Ign Timing - Couple questions

Non-vehicle specific forum for tuning all ford ecu's 1994-2004, including the 1994-1995 Mustang, 93-98 Mark VIII, 99+ F-150, 99-04 Mustang, 03-04 Cobra, 99-03 Harley Davidson and Lightning F-150

FBFG2, CBAZA, CZAJL, and all EEC-V

Ign Timing - Couple questions

Unread postby Fanged03 » Thu Jul 12, 2018 8:17 pm

Guys,

I'm working on making a tune for E85, car is currently on the stock timing map. Bare with me, I've never really dealt with timing before, not even on a distributor.
1. I'm wondering if the timing numbers in the tables are based on a zero point of TDC or from the programmed timing offset?
2. As far as I'm aware the timing curve should be inverse to the load curve, correct? or can you just flat line the timing pas a certain rpm?
3. SAFTOT is the correct pid to datalog?

Thanks guys
Fanged03
General Poster
 
Posts: 11
Joined: Tue Apr 10, 2018 6:46 pm
Location: NW Indiana
Name: BRENT
Vehicle Information: 2003 Cobra
FBGI0 / AMZ2
QH / BE

Re: Ign Timing - Couple questions

Unread postby jsa » Thu Jul 12, 2018 8:43 pm

1. From TDC
2. LOAD and rpm
3. Yes
Cheers
John
jsa
Power Poster
 
Posts: 370
Joined: Thu Jan 16, 2014 1:44 am
Location: In the shed or On the Computer, 'straya
Name: John
Vehicle Information: Escort RS Cosworth
EEC-IV GHAJ0 ANTI or COSY

Re: Ign Timing - Couple questions

Unread postby Fanged03 » Sun Jul 15, 2018 2:16 pm

Thanks for the reply John. Where abouts in Oz? I spent some time in Queensland last year and got to experience the Northern Nats, loved it up there, even with the high concentration of animals that want to you kill you.

Reading my #2 question over, it was pretty vague. Let me rephrase/clarify.

I know spark is determined by rpm/load. Lets say during a WOT run, how do you typically set up your timing curve for the WOT area of the table? I read an old mustang and ford magazine article where they put timing at 23* everywhere from 3000 to 6500 rpm. I don't plan to go that far, I'd like to get to 18-20* then get to a dyno for further dialing in. But does that seem right, flat lining the timing?

Another question I'm wondering about, going to e85, should I just add some timing to the entire table right off the bat? say 2*s?

Thanks.
Fanged03
General Poster
 
Posts: 11
Joined: Tue Apr 10, 2018 6:46 pm
Location: NW Indiana
Name: BRENT
Vehicle Information: 2003 Cobra
FBGI0 / AMZ2
QH / BE

Re: Ign Timing - Couple questions

Unread postby jsa » Sun Jul 15, 2018 3:11 pm

I am in Brisbane. Glad you enjoyed your stay and didn't fatten up the wildlife, lol.

I wouldn't take much notice of magazines that say flatline advance over a broard range. Tuning is about finding what the engine wants. Certainly e85 wants more advance, so take it up a little at a time and see what gets best power for least advance. Do you know what detonation sounds like?

I don't have experience with your engine, so I won't give you any magic numbers to plug in.
Cheers
John
jsa
Power Poster
 
Posts: 370
Joined: Thu Jan 16, 2014 1:44 am
Location: In the shed or On the Computer, 'straya
Name: John
Vehicle Information: Escort RS Cosworth
EEC-IV GHAJ0 ANTI or COSY


Return to EEC-V & SN95 Tuning

Who is online

Users browsing this forum: Patricktjms and 13 guests