Ask Andi B. about problems with swapping.
As for the differences, no one knows.... The OBD2 does give timing back, it just takes some time.
As for the differences, no one knows.... The OBD2 does give timing back, it just takes some time.
Do you have an EGT gauge?QuikSilverTT said:I swapped my OBDII ECU for an OBDI ECU and the only problem I had was the TRAC light flashing and TRAC not functioning. I unplugged the TRAC ECU connectors and that cured the TRAC light problem. So basically everything functions properly, but the OBDI swap will eliminate the TRAC.
650C is okay. That means your car is running pretty close to optimal IMHO.. (I'm assuming the 650C is at the end of a long pull to 150mph, not a short 3rd gear blast to 90 or a 4th gear romp to 120)...QuikSilverTT said:I've got an EGT guage, but I have not tried it with the OBDII ECU. With my OBDI ECU, I've never seen anything above 1200F(~650C). But I also do not have an aftermarket fuel computer to try and play with a/f ratios.
The OBDI ECU I have is a used G-Force I purchased from a friend with a 94TT T04R. He called G-Force and had them burn 2 new PROMs for stock timing and stock fuel with the exception of speed cut, boost cut, and rev limit at 7600rpm. Since I had heard mixed opinions on G-Force tuning, I decided to have them put everything back to stock except for necessary items(i.e., fuel cut, boost cut and speed cut.
Don't Jinx me AndiAndi said:
650C is okay. That means your car is running pretty close to optimal IMHO.. (I'm assuming the 650C is at the end of a long pull to 150mph, not a short 3rd gear blast to 90 or a 4th gear romp to 120)...
Back when I had an OBD1 ECU, I could easily see 700C by the end of a 40 to 120 pull. The wideband o2 said I was running 13:1. Not cool.FYI I tried 4 different combinations with the same results: MAF with no fuel computer, S-AFC with MAF, VPC by itself, and VPC with a SFC-R. None of these combinations changed the results at all; it was as if the OBD1 computer was ignoring the MAF reading and staying in closed loop! Weird shit....
This was with a stock '94 ECU. Same results when I tried it with a different OBD1 ECU, this one being a EuroX modified ECU.
Then I put the '98 ECU back in, didn't change anythign else, and EGTs were back to maxing out at 650-660C at the end of a long pull.
I guess my '98 is one of the few that really just doesn't like OBD1 ECU's.... and my guess is that Scott Smith's '98 is another...
Andi
Sounds like your car is tuned ok.QuikSilverTT said:Here are the results from my run tonight:
Started in [email protected] - 825F(426C).
Top of 4th - 1175F(621C)
Mid 5th - 1225F(649C).
I stayed in 5th for ~4 seconds. Don't ask me mph because I was too busy watching the road! I've only got country roads to do this on!![]()
Zerosoul said:guys,
see if you can help me out a bit on my EGT situation.
I am 94 BPU running 18psi on stock MAF and stock fuel and FMIC. recently after I installed my Omori EGT gauge with probe on top of DP, I have been geting EGT reading up to 750Con a hard pull to 130+ on 5th gear.
I know its running way too hot, can you guys help me identify what could be the problem?
I just ordered the HKS AFR hoping to dial more fuel into the engine and make it run extra rich, other than that I am suspecting the problem originates from our shitty california 91 octan pump gas.
Also, my fuel filter was changed around 20,000miles ago.
thanx
Jonas
Looks like I have some calculation errors.QuikSilverTT said:Here are the results from my run tonight:
Started in [email protected] - 825F(426C).
Top of 4th - 1175F(621C)
Mid 5th - 1225F(649C).
I stayed in 5th for ~3 seconds. Don't ask me mph because I was too busy watching the road! I've only got country roads to do this on!![]()