G
Guest
·I noticed last weekend at willowsprings that my car was kinda weak... coming out of corners, and down the straights.. i figured it may have been tcs retarding timing or doing some other stupid crap. So, for this weekend at buttonwillow, i popped the trac fuse and tested it.
At buttonwillow, the car felt even weaker... the midrange was just awefull, and the topend was marginal. On the street it feels ok (i can feel the second turbo come on at 3200 solidly)... but on the track it just feels slow.
Here is some info, if anyone has an idea what it could be:
Stock boost, exhaust, intake.
Trac fuse removed.
I have seen it smoke for a split second on startup 2 or 3 times... i think it was after i turned it off without letting it idle, and restarted when it was cold. Maybe valve seals?
Also at buttonwillow (and willowsprings), i was running the suck ass southern california 91 octane gas.. combined with the heat (100+ degrees) at both tracks, could that have been causing the knock sensor to retard the timing enough to cause loss of power? I was thinking about pumping in 100 octane at BW, but i didnt remember what exactly you had to do with the mkiv when switching to (unleaded) race gas.
At BW, it actually felt like the second turbo wasnt coming online... thats how slow it felt... altho i went back and forth from the street and the track multiple times throughout the day and i know the second turbo was working.
Also, i ended up using nearly 1/2 a tank of gas per 30 minute run session.. that seems way abnormal..
Any thoughts/opinions would be appreciated..
I havent had a compression test done, but im planning to. If anyone can recommend a good tuning shop that can look at and work on my car in so cal let me know...
-mike <-- still no overheating problems.. yet
At buttonwillow, the car felt even weaker... the midrange was just awefull, and the topend was marginal. On the street it feels ok (i can feel the second turbo come on at 3200 solidly)... but on the track it just feels slow.
Here is some info, if anyone has an idea what it could be:
Stock boost, exhaust, intake.
Trac fuse removed.
I have seen it smoke for a split second on startup 2 or 3 times... i think it was after i turned it off without letting it idle, and restarted when it was cold. Maybe valve seals?
Also at buttonwillow (and willowsprings), i was running the suck ass southern california 91 octane gas.. combined with the heat (100+ degrees) at both tracks, could that have been causing the knock sensor to retard the timing enough to cause loss of power? I was thinking about pumping in 100 octane at BW, but i didnt remember what exactly you had to do with the mkiv when switching to (unleaded) race gas.
At BW, it actually felt like the second turbo wasnt coming online... thats how slow it felt... altho i went back and forth from the street and the track multiple times throughout the day and i know the second turbo was working.
Also, i ended up using nearly 1/2 a tank of gas per 30 minute run session.. that seems way abnormal..
Any thoughts/opinions would be appreciated..
I havent had a compression test done, but im planning to. If anyone can recommend a good tuning shop that can look at and work on my car in so cal let me know...
-mike <-- still no overheating problems.. yet