I went to the tracks the other day and made 2 runs. The first run I had to shut down due to the back end getting too loose in 2 ond gear. My second run looks like this:

60' 2.2
1/4 mile 14.1
103mph


this was done on street tires ( full pressure)
12lbs of boost
shifting at 7000 rpm

I spun the tires like crazy off the line. I left at 4000 rpm with some wheel hop. Tried feathering the throttle a little to help with traction but it didn't help my 60' times. This was a shake down run so I didn't expect too much but what do you guys think? What kind of times do you think I could get with slicks?

thanks
Kelvin

 

Next time I'll run more boost and hold the revs a little more. Just taking it easy on the first few runs!

 

With your setup, I assume you have a full exhaust, I would expect to see low 12's pretty easily and probably 11's. My concern is not your 1/4 mile time or your 60' but rather your trap speed. Why is it so low? 103? That is less than a bone stock FD?

 

Your trap is kinda low for running 12lbs. A 103 with good 60 foot will get you low 13s at best.

 

Thanks guys. I am suspecting I am losing some boost via the wastegate right now. Is there any way to check for leakage?

 

Get an aftermarket boost gauge?



-Ted

 

I got a boost gauge but I think I want to get one with a playback feature. I did not watch the boost gauge during my first two runs. I looked at my power FC after the run to see max boost.

Kelvin

 

Ok what did your power fc tell you?

 

max boost .80
max rpms 7104
max temp 89c

 

You should learn to watch the boost gauge during the run, especially in 3rd gear.&nbsp You're not fast enough right now to zip through 3rd, and you should be able to glance at the boost gauge at the top of 3rd gear.&nbsp You're shifting into 4th gear right before the traps, right?&nbsp The car will normally run 1/3rd of the track in 3rd gear with your kinda power...



-Ted

 

Wow, you right on the money there. I shifted into 4th not too far from the finish line. Does that mean I should have stayed in 3rd though the traps?

thanks
Kelvin

 

disregard my last post...I see what you meant

 

I don't have a boost controller hooked up right now so I adjust boost via the wastegate spring. Could this be partly a reason why my top speed is so low? Losing too much exhaust energy . My vac/boost line is hooked up directly to the wastegate. I also have the spring tensioner bolt backed out pretty far because my wastegate spring is in the 14lbs plus range. Apexi does not sell a lower lbs spring for this wastegate. Maybe I should purchase another wastegate with a lower spring rate (maybe a TIAL?) Also what boost controller would you recommend with my mods. I don't want to use the PFC to contol boost. Comments...please

 

bump

 

Doesn't the FD come with a Torsen LSD? If your tail is getting happy during the run, I would suggest more rim and tire back there.

Your runs sound like mine. My turbo is too big for my application. Makes me slower. Might want to research that... I posted the times in the drag times thread.

~Jeremy