fresh 408 needs more fuel please help

Vehicle specific forum for tuning the Foxbody Chassis Mustangs utilizing the LUX0, GUFA, GUFB, and GUF1 Strategy

fresh 408 needs more fuel please help

Unread postby Kurt_capri » Sun Mar 25, 2018 10:51 am

*edit* i have just downloaded the GUFX.xdf from this sites tread also***
Hey guys thanks in advance got the help..
engine is currently running the 93 cobra tune X3Z.bin and GUFB_56k.xdf and i have also tried an A9L tune with 24lb injectors but im getting what we believe is spark knock pre det throughout all load positions.. ive pulled some of the spark plugs and i feel like its running a bit lean i would like to add more fuel in the tune but i do not know how to do it im a little confused if you could offer some assistance it would be greatly appreciated...
Im running 94 octane with octane booster i have the distributor set at 10 degrees base timing. when the engine is cold it doesnt want to stay running easily till it warms up a bit which also makes me think its slightly lean.
the fuel pressure regulator is set at about 40lbs (if i need to up that please let me know)

im newish to tunerpro so please be specific on what table numbers that would need to be changed to add more fuel.. thank you very much!
i will be getting a professional tune done in the coming months with 42lb injectors i just need to get car running decent to make sure its all good before i bring it 4 hours away and pay some good $$ for a tune and to find out something is wrong lol
last summer i was running a 302 with afr165 heads with the same injectors and maf and an a9l with 24lb injector tune and didnt have any knocking

Here is the specs of the motor
A9L computer with SCT chip
87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Sun Mar 25, 2018 11:16 am

the rhs heads are fast burn heads which take a significantly less amount of timing than the very slow burning afr heads, I wouldnt recommend anymore than 22 degrees of timing at WOT until u get it tuned, and them injectors are gonna be done by 2k rpm on that setup at 40psi base, if u have an adjustable fuel pressure regulator id recommend kicking it up to 75psi base for the time being.

Toss in the a9l2 tune, adjust the spark per the mbt recommendations, with the 55psi 24lb injector loaded in multiply the slopes, breakpoint and offset by 1.2 for the 75psi base vs 55psi.

load in the fox 24lb maf transfer as the a9l2 states

that should get you 90% of the way there, then just rape the maf to get your fuel correct for the time being
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Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Sun Mar 25, 2018 11:20 am

thank you for quick reply!
im a bit confused on some of that you wrote lol i understand increasing my fuel reg to 75psi....and thats about it lol
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Sun Mar 25, 2018 12:01 pm

the a9l2 and the getting started write up on the homepage will fill in the rest
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Sun Mar 25, 2018 12:54 pm

i have found what ur tlaking about and i have done up to the spark table part...
im confused on what to do here can you elaborate... i dont understand the formula
For engines with aftermarket heads, its typical to reach loads of up to 90 and greater, increase the ENTIRE TABLE (ALL CELLS)
by the difference of MBT spark at 3k+ subtracted by current value in tune at 80 load and 3000 rpm.
MBT reference can be found HERE
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Sun Mar 25, 2018 2:03 pm

the mbt reference chart for the rhs heads lists 22 degrees

in the a9l2 at 80 load and 3k rpm there's an interpolated value of 27 degrees

since you have 27 degrees now in the a9l2 and you want 22 just subtract the whole table (fn2200) by 5 degrees
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
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00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Sun Mar 25, 2018 2:15 pm

can i subtract 5 degrees using the Global spark modifier - KPS1 or do i have to edit the whole table minus 5 degrees? also in the table if the value is 7 do i make the value 2 and if its 2 do i just set it at 0?
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Sun Mar 25, 2018 3:30 pm

no never use global multipliers like that

just click the top left of the table and it will highlight the whole table, then go up to the adjustment box and put in -5 make sure the drop down has +/- selected and not multiply or divide
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Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Sun Mar 25, 2018 4:36 pm

lol ok that seems easier haha

i have entered in the list of stuff that the A9L2 guide says but i cant get the maf transfer close to being right i have used the drop down menu on the guide to select 24lb calibration and tired both the regular and the simplified and both make the car run way to rich just sputters when i accelerate

i have dialed back the timing 7 degrees on the X3Z bin and i tried to add fuel with that global fuel multiplier and it seems to run pretty good like that im going to take it for a longer drive and see yet but is it ok to add fuel using that global fuel.. i set it at .95

also maybe im setting up the engine size settings wrong and the manifold slow and fast fill constants.. could u help with that

thank you again for all your help!!
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Sun Mar 25, 2018 9:51 pm

you need to dial in the maf
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Sun Mar 25, 2018 10:50 pm

ok... one last question.. even tho my MAF is calibrated for 24lb injectors.. should i just drop in my 42lb injectors, set the injector stuff for 42lb and then just adjust the MAF transfer till i get the right ratios? or is there other things i need to do to put 42lb injectors in with a 24lb maf?

im buying a wideband tomorrow.
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 9:05 am

calibrated mafs are for stock tunes only, once you have the ability to tune the ecu the maf calibration is no longer valid

the maf write up explains it in more detail http://www.efidynotuning.com/maf101.htm

anytime you change injectors there's 5 things that need to be changed

AHISL -Injector High Slope - the actual injector flow rate when linear
ALOSL - Injector Low Slope - the low pulsewidth flow rate when the injector is not linear
FUEL_BKPT - Injector Breakpoint - where the ecu uses more of the high slope than the low
FN367 - Injector Offset - the injector "lag" time, the actual time it takes for the injector to open for a given voltage
Crank PW - Cranking PW, with larger injectors you need to reduce the time the injectors are firing during startup otherwise it'll startup rich

and for later EEC-V with returnless fuel systems there's the 4 deltaP multipliers for fuel pressure, that doesn't apply/exist on eec-iv though
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 9:10 am

Ok so I can put the 42lb injectors in and set those 5 things u mentioned and just dial in the maf transfer?
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 9:29 am

yes, or you can leave in the 24s and dial in the maf makes no difference
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 9:49 am

Oh awesome!! Thank u!! You been so helpful!! If I have some issues later I know where to go thanks man!!
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 11:45 am

what exactly do i do with this Breakpoint 0.0000237991 number from the FRPP 42 @55psi table in the A9L2.bin... there is 2 injector breakpoint tables... 1 table shows values of 5.00008463386 and the other table just shows 0.0000100
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 11:56 am

those functions are both the same

the 5.xxx function is for the older style breakpoint for those who choose to use it

the 0.0000100 breakpoint function is the same function just displayed in mass as thats how ford racing shows their values

change 0.0000100 to 0.0000237 from the injector data page

make sure you change the whole y axis (right side) of that function to the same value 0.000237 from the top to bottom on the right side
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 12:02 pm

ok i did that thank u... im confused on the load scaling and what to put in the FN035 table lol and for the Engine Size Displacement - SARCHG i put 408?
Kurt_capri
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Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 12:33 pm

once you get your maf dialed in you simply do a wot pull from idle to redline and plug in the perload correction into fn035 at each rpm point, nothing to worry about for now

yep sarchg is the engine size, just as the a9l2 states:

SARCHG Cubic Inch Displacement Input your actual engine size or scaled percentage if applicable (CLICK HERE FOR SCALING)

since your tune isn't scaled plug in your actual engine size of 408 cubes
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 12:36 pm

ok so i dont need to adjust the FN035 right now? also i dont have my own dyno so where do i find my preload correction figures? do i need some kind of data logger to get that?

also my 24LB injectors arent in the injector list... how would i find the specific slopes on them.. 0280155923 is the part number
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 12:46 pm

correct don't worry about fn035 for now, the a9l2 values are going to be pretty decent since your tune isn't scaled and you have a stroker

you don't need a dyno

Perload is a logged value

A dyno won't give you that info only way to get it is to log it using a quarterhorse or the like

if you don't have any way to datalog then you need to make fueling based on throttle position only to do that:

set fn303 the WOT multiplier to the lambse you want at WOT, just set the whole y axis to 0.865
change fn320a the ect OL threshold below 240 degrees from 0.95 or whatever it is to 2.00 load to null it
change the top 3 rows of the base fuel table from 0.875 and 0.805 to all 1s just like the cells beneath it, do not change the last column for overheat protection

it already should be but make sure the WOT threshold is 550 ad counts or 3.0 volts
it already should be but make sure the open loop throttle position threshold scalar is 550 ad cts or 3.0 volts

if you have a wideband then force open loop clear the kams and log the maf voltage with a volt meter, adjust the maf transfer to get the fuel dialed in, once you get it dialed in re-enable closed loop

if you do not have a wideband then keep it in closed loop and hope for the best, make sure you have new o2 sensors in it and that the o2 enable/disable switch is hooked up on the back of the cylinder head, thats the hego ground wire that MUST be grounded to turn the hego on otherwise the hego will dump fuel until it fails and forces open loop setting a check engine light
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 1:09 pm

Ok my wideband comes in tomorrow... so when logging the maf voltage do I have to be driving the car or just sit in neutral and hold it at different rpms get the voltage and AFR and adjust the maf transfer at that logged voltage?

Do I probe pin 9 or pin 50 for the maf voltage?
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 1:10 pm

yep you can do it standing still since its a naturally aspirated engine get it in the ball park then drive it and hold the mafv stable while driving to double check it and make sure it stays at the same afr as well as reach the higher mafv points you can't reach standing still
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Mon Mar 26, 2018 1:14 pm

Which pin do I probe for maf valtage is it pin 9 or pin 50?
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Mon Mar 26, 2018 1:59 pm

pin 9 if memory serves, its been a while since i probed one
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Wed Mar 28, 2018 3:57 pm

I’ve put my 42lb injectors in.. what should I set my fuel pressure reg to? 39 or 55?
Kurt_capri
General Poster
 
Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Wed Mar 28, 2018 6:14 pm

55psi
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decipha
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Posts: 15314
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Wed Mar 28, 2018 6:35 pm

ok i have it set at 55PSI and i have the 42LB injectors settings loaded in from your website for the FRPP 42lb injectors at 55 and i have the MAF table from Fox - 24lb "calibrated" - simplified and the car is really rich and back fires with that table... do i decrease the kg/hr values to lean it?
im having a hard time even getting it to start somtimes cuz i think its too rich

my maf is a granatelli 24lb maf
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Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Wed Mar 28, 2018 10:06 pm

yes decrease it at the mafv its rich, better to be lean than rich
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Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Thu Mar 29, 2018 8:48 am

Wait do I decrease the V or the kg/hr values? Lol u confused me there for a sec
Kurt_capri
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Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Thu Mar 29, 2018 9:25 am

the flow, the kg/hr
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
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00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Thu Mar 29, 2018 1:21 pm

well i give up... cant get it to run worth a shit plus the engine kicked back and sheared some teeth off the flywheel so im done... she gonna get a new flywheel and im taking it to toronto for a professional tune
Kurt_capri
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Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby decipha » Thu Mar 29, 2018 6:12 pm

engine kicking back isnt a tune issue thats due to the ignition timing being way out of wack

you also said earlier in a previous post it was backfiring, if it were backfiring through the exhaust that means you have an ignition issue as well

make sure u get it fixed before u bring it to get tuned, the typical fee for diagnostics is on average $600+ at my shop which is extremely cheap considering on average it usually takes 16 hrs to diagnose in almost every case the owner knew they had issues but ignored them
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Thu Apr 19, 2018 8:15 am

So I’ve taken the car to a dyno shop that uses SCT and he got it running decent but he didn’t dial in the fuel 100% it was pinging for him too.. also when driving at 2500rpm and u slightly press the throttle the car leans right out and pings... was thinking of getting a quarterhorse and trying it myself again since this guy charges A LOT for tuning per hour
Kurt_capri
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Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby Kurt_capri » Thu Apr 19, 2018 9:18 am

Also would there be a way I can extract his sct tune and edit it?
Kurt_capri
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Posts: 19
Joined: Sun Mar 25, 2018 10:40 am
Name: Kurt Brown
Vehicle Information: 87 mustang with capri font clip.
408 stroker (currently 24lb injectors) **will be changing to 42lb later**
tubular gt40 intake
4" anderson power pipe and 4" maf for 24lb injectors
RHS 215 64cc heads
BBK swap shorty headers
comp cam 291THR7 Thumpr
http://www.compcams.com/Company/CC/cam- ... =1527&sb=2

Re: fresh 408 needs more fuel please help

Unread postby Paulie » Thu Apr 19, 2018 10:35 am

Kurt_capri wrote:Also would there be a way I can extract his sct tune and edit it?

You can use a Moates Jaybird to read what is on the chip.
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Re: fresh 408 needs more fuel please help

Unread postby decipha » Thu Apr 19, 2018 4:10 pm

most likely its junk, if you have issues you need to fix that first before tuning it
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decipha
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Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce


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