knock knowledge feed back on detonation needed
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dyno run today detected knock help
just got my car on a dyno and at first some detonation was detected at around 3000 rpm @9 lbs, but i remembered that the profec b pump is mounted in my engine bay w/o isolaters so the taps from the valve regulating the pressure is heard in the cabin. well anyway my car ran 216.9 hp with my max air/fuel @17.5. detonation was present @5500 rpm.
it could be from the UTEC that was preprogramed for stage 2, and my timing is off. my mods are as follow (utec set for stage 2, hks cat back, profec b, silencer mod.) awaiting to install pde up and pde down pipes. what you guys think
it could be from the UTEC that was preprogramed for stage 2, and my timing is off. my mods are as follow (utec set for stage 2, hks cat back, profec b, silencer mod.) awaiting to install pde up and pde down pipes. what you guys think
Last edited by UU R X; Dec 10, 2002 at 02:54 PM.
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Stage 2 is a turboback,yes?
So you are tuned for a turbo-back, but are using the stock downpipe?
Yes, that is your problem. People have blown engines running Stage 1 setups with Stage 2 Unichip maps.
I would strongly recommend tuning your car properly.
Where was the max air fuel? 17.5:1 is WAY lean. Did you mean boost pressure at 17.5 psi? On what turbo? Stock? That's too much if you're on the stock turbo Try down around 15 - 15.5.
If you don't know what you're doing with the tuning, I would just pull the UTEC off until you get the downpipe installed. Then you should be better off. Still, I wouldn't drive around with 17.5 psi on the stock turbo.
So you are tuned for a turbo-back, but are using the stock downpipe?
Yes, that is your problem. People have blown engines running Stage 1 setups with Stage 2 Unichip maps.
I would strongly recommend tuning your car properly.
Where was the max air fuel? 17.5:1 is WAY lean. Did you mean boost pressure at 17.5 psi? On what turbo? Stock? That's too much if you're on the stock turbo Try down around 15 - 15.5.
If you don't know what you're doing with the tuning, I would just pull the UTEC off until you get the downpipe installed. Then you should be better off. Still, I wouldn't drive around with 17.5 psi on the stock turbo.
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Originally posted by UU R X
thats what i think its is the fact i dont have my up and down pipes in, well im disconnecting my unichip and running stock ecu untill i install everything. do you think iv'e damaged anything? (from the slight knock)
thats what i think its is the fact i dont have my up and down pipes in, well im disconnecting my unichip and running stock ecu untill i install everything. do you think iv'e damaged anything? (from the slight knock)
Consfused.. Top post you said Utec. This post you say Unichip.
CT
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If you have the UTEC do some data logging, find where you have detonation and back off your timing a degree at a time at that load point until the detonation goes away. You may want to download the utec logger to help easily identify your detonation points from http://24.79.147.167/utec/uteclogger12.zip . Always remember that stock maps are starting points, not gospel. You usually have to do some fine tuning for your specifics. Also, do you get 91 or 93 octane where you live. The stock TurboXS maps are set up for 93 octane-if you get 91 you may have to retard your timing between 2-4 degrees.
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