STI 7 : important information about engine failure
10 April 2003, 04:36 PM
#61
The standard Cossie ECU suffers from the same problem in that it does not have a part throttle map. So when highly tuned, it is recommended not to part throttle them, as you get all the boost and not the fuel...
However, the SECS ECU does have this ability (as does the Pectel T6).
However, the SECS ECU does have this ability (as does the Pectel T6).
10 April 2003, 07:47 PM
#62
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Does any map tuner know if STi7 and 8 have scaled or linear maps regarding TP ???
I was just thinking about some kind of EMI adapter (like the Vishnu one) to raise TPS at certain values... and eventually correct other signals such as MAF.
XNWRX, do you see what I mean ?
I was just thinking about some kind of EMI adapter (like the Vishnu one) to raise TPS at certain values... and eventually correct other signals such as MAF.
XNWRX, do you see what I mean ?
10 April 2003, 09:33 PM
#64
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I do see STI_M8 Changing the TPS signal is not a problem. But what rules are to be applied and in respect to what (RPM ; Boost) ?
I can imagine TPS is used as load as well for ignition MAP, fuel MAP, boost MAP ...etc !
Changing the TPS signal is not a problem. But what rules are to be applied and in respect to what (RPM ; Boost) ?I can imagine TPS is used as load as well for ignition MAP, fuel MAP, boost MAP ...etc !
04 June 2003, 12:47 AM
#65
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Out of curiosity, I did a few runs this morning. JDM STI7 Type RA, std fuel pump, exhaust, ECU. Aquamist 1s WI kit.
Firstly, I had trouble holding 1bar boost exactly. I could only get it between 0.95 and 1.05bar and hold it steady around there. Did about 10 runs, mostly in gears 4 and 5.
- My SECS showed a AF value of 0.75.
- My turbotimer Lambda function showed a value between 11.8 and 12.2.
- My SECS showed a Injector Duty of 150-160ms.
I had reckoned that the mixture was a bit richer than the above at WOT, so I threw in a few WOT runs. For WOT, the Lambda value dropped to approx 11.2.
At no time did I see hints that the mixture was going to head back to 14.7 at part throttle/1bar. How long do you have to hold this for? I don't think I held any run for longer than 5 seconds.
John/Bob - are these SECS figures in the right ballpark?
Deep/Ray - you guys have JDM STI7s too right? Do you get such figures?
Cheers!
Edited to add that my KL was absolutely quiet thru all this. Not even a single green.
[Edited by RT - 4/6/2003 12:53:30 AM]
Firstly, I had trouble holding 1bar boost exactly. I could only get it between 0.95 and 1.05bar and hold it steady around there. Did about 10 runs, mostly in gears 4 and 5.
- My SECS showed a AF value of 0.75.
- My turbotimer Lambda function showed a value between 11.8 and 12.2.
- My SECS showed a Injector Duty of 150-160ms.
I had reckoned that the mixture was a bit richer than the above at WOT, so I threw in a few WOT runs. For WOT, the Lambda value dropped to approx 11.2.
At no time did I see hints that the mixture was going to head back to 14.7 at part throttle/1bar. How long do you have to hold this for? I don't think I held any run for longer than 5 seconds.
John/Bob - are these SECS figures in the right ballpark?
Deep/Ray - you guys have JDM STI7s too right? Do you get such figures?
Cheers!
Edited to add that my KL was absolutely quiet thru all this. Not even a single green.
[Edited by RT - 4/6/2003 12:53:30 AM]
04 June 2003, 12:07 PM
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RT and all others JDM cars owners, no offense, but I think that if we mix measures from JDM and Euro 5 STIs many of the readers may be confused. It's sure that standard JDM cars are far away in the mix domain due to your less strict pollution laws...
Apart that, keep in mind that european and english ECUs have not the same ref. number, perhaps only due to the RHD/LHD difference, but not sure; are your cars Euro 5 emissions compliants ?
[Edited by Scooby50WRX - 4/6/2003 12:46:59 PM]
Apart that, keep in mind that european and english ECUs have not the same ref. number, perhaps only due to the RHD/LHD difference, but not sure; are your cars Euro 5 emissions compliants ?
[Edited by Scooby50WRX - 4/6/2003 12:46:59 PM]
04 July 2003, 11:25 AM
#68
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Sorry, for the lack of information, both STIs are running with a sport cat, one with a Prodrive one, and the second with a Madac one (same measures).
It's strange for me if mix is different on a non full decat exhaust (I'm not a specialist ;-).
One of our friends says that he had see same problems on a non decat one with only backbox changed...
Could we suppose that with standard exhaust this lean point is displaced ?
Apart that, in fact, a lot of STIs are running with non standard exhaust so I hope the information will be helpful for a lot of us. The ones who are running with standard exhaust and more power are not numerous.
[Edited by Scooby50WRX - 4/7/2003 11:37:30 AM]
It's strange for me if mix is different on a non full decat exhaust (I'm not a specialist ;-).
One of our friends says that he had see same problems on a non decat one with only backbox changed...
Could we suppose that with standard exhaust this lean point is displaced ?
Apart that, in fact, a lot of STIs are running with non standard exhaust so I hope the information will be helpful for a lot of us. The ones who are running with standard exhaust and more power are not numerous.
[Edited by Scooby50WRX - 4/7/2003 11:37:30 AM]
04 October 2003, 03:07 PM
#69
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As boost achieve is not proportionnal to throttle position, you might have this "feeling" even if it has switched from stoich to rich...
I can't remember the way it was with the stk exhaust, but I had a similar sensation with my 98' as ECU was trying to achieve maximum boost from a certain -low- TP (open loop above 0.3b)
[Edited by STi M'8 - 4/10/2003 7:41:15 PM]
I can't remember the way it was with the stk exhaust, but I had a similar sensation with my 98' as ECU was trying to achieve maximum boost from a certain -low- TP (open loop above 0.3b)
[Edited by STi M'8 - 4/10/2003 7:41:15 PM]
