[joey9576]

I went to the track this last weekend and made 11 passes. My car was running okay for the first 9 passes but after that through 3rd gear it felt like a significant power loss. I compared traps and times and I lost about 6 tenths. Not sure what happened but to be safe I took the car home. Anybody recognize this problem? It is a bpu supra and made 362 whp, and my times went from13.1-13.3 to 13.7-13.9. They were all pretty consistent runs untill this problem. I have no idea what's wrong.

 

[1A1]

Could be many things.

Slipping clutch, boost leak, bad plugs, etc. I would do a pressure test first. Also, what was your boost set at during the runs? DId boost decrease at the end of the night?

Steve

 

[JamesN1830]

So you only lost on the big end? Sounds like it was pulling timing.

 

[joey9576]

boost was ok through the runs. Boost is at a little less than a bar of boost. It was only in the top end. Just trying to find out if it is something i should attempt to fix or take to the shop.

 

[Steady Boostin']

i'd say its pulling timing. slipping clutch would be more lower end wouldn't it?? but a boost leak would cause it as well. maybe a coupler split or a hose split.

 

[crossways]

Sounds like you had plenty of runs and ended up heat soaking and pulling timing.

 

[joey9576]

If I were pulling timing will the car be ok now that it has cooled down or did I were something out?

 

[Silver Orchid SP60]

If I were pulling timing will the car be ok now that it has cooled down or did I were something out?

Reset the ECU. It wont go back to the original timing till u do.

 

[HotSoup]

If I were pulling timing will the car be ok now that it has cooled down or did I were something out?

:faint: