Dyno Run

[Majite]

I am getting my exhaust put on today. Well the shop offered me a free dyno run with it. 152hp/146lbs tq. They told me I am running really rich. I don't understand how. I have no fuel mods. I have a Walbro 255 waiting to be put in tho. This was run at 9 psi. Could it be cause the boost is so low??

 

[titogs95]

Same thing is happening to my friend Ivancho (98 gst)
He is only running 12psi and he is really rich. You can notice a little bit from the exhaust. It is all stock.

But I will like to see the logical explanation.
Sorry for not answering your post I just wanted to make a comment about it.

 

[dave99gst]

9psi can be part of it -- the stock ECU is set to favor the rich (safe) side of things. Most people that get a AFC with stock fuel mods end up leaning out around 5% to get more out of the car.

 

[Majite]

But would leaning out -5% equate to me losing that much power? Doesn't a stock gst push 180ish to the wheels? I did do a 3rd gear pull log the other day and made a post about it.

http://www.dsmtuners.com/forums/showthread.php?t=177311

According to the log I'm running rich all the time and my timing is very jumpy.

Trying to get the car ready for an event we are having here soon. $10 All day at the track 8 am until midnight.

 

[CanadianTSi]

9 psi is kinda low, stock cars usually run 12ish and the car is designeed to run rich from the factory.