k well i sorted all the problems on my car now. but now my car isnt pulling hard how it use to, its doesnt have the kick back(almost 2 mnths ago it would pull quite hard). it makes perfect boost. Could it be something to do with clutch related or something to do with the engine?

 

Compression test? I had a similar issue and it turned out that I had blown a side seal on the rear rotor.

 

umm guess i ll check dat out! But the motor is running flawless, no rough ideal wats ever!

 

Obviously it's not running flawlessly, given that it lacks power. Trust me, you won't know you had low compression until you test it. A side seal going only compromises ONE rotor face, so it's not nearly as perceptible as apex seal failure.

 

maybe ur *** dyno is bored

 

umm kk i ll get that checked out thanks

 

possible you just got used to how the car feels.. drive in a slow car then get in there after 2 days of driving see how it feels now, or it could be ur clutch is slipping ?

 

do a 0-60 and time it report back

also do a 3rd gear boost run...its possible ur secondary turbo is not kicking in and the 10-8-10 is trailing with the primary only..same psi but not the same cfm

if it was a side seal your engine vaccuum would be off at idle

 

no i bearly drive my car so no i dont think its that.. and i am running non sequential.. and other thing i was thinkin could high flow cat cause this? I did recently take off the all the emission stuff off and was fine the first couple times i drove it after that just didnt have that pull or the kickback watever u wanna call it

 

Um, do you have a boost gauge?

 

yes i do!!

 

i think ur pull/kickback = TORQUE = )

im facing similar problems too... im suspecting primary turbo blown on my car, i feel a turbo lag, or barely feel boost or hear my turbos spin at low boost =O

but i feel it when i go on high boost, and i can hear and feel the secondary kick in =.=

 

My C5 doesn't feel as fast as it was when I bought it either. Just means I got use to 550hp.

 

no their something definatly wrong cuz i know how strong the car pulled b4 but now it doesnt pull hard how it use to!! whats the vaccum idle suppose to be?

 

do you have a boost gauge? check your pattern.

 

yes i do have boost gauges and its boosting perfect!! I am running non seq. any ideas? i think it could be the turbos( i remeber lil while ago a little bit of smoke was coming out of it but that was only when i start my car after that it would go away, but this would happen only if i hadnt started my car in while or drivien it).

 

Here's a thought. Maybe you've just gotten used to the car at the level it's at now. That has happened to me a bunch of times. I thought my current car was fast when I first got it, but now it feels slow. Sometimes you just get used to the power that your car is making, so that "thrown back" feeling gets lost.

Other things you can look at:
- Heat? You have any way of telling what your IATs are?
- Oil change? When was the last time you changed the oil?
- Spark plugs?
- Fuel filter?

If the car runs perfectly then it probably isn't the last two, but you never know I guess. Decrease in fuel or spark, or hot intake air could definitely have an effect on the power your car is making, although I'm pretty sure the engine wouldn't be running smoothly if you had that kind of problem.

 

no i dont have any way of telling IAT. umm recently idid the oil change! i just changed the fuel filter like 3 days ago but havnt changed the spark plugs yet. I will be changing those soon! But honestly guys i can tell u that my car defintly doesnt pull hard like how it use to at full boost! i know you guys think i got use to the power maybe so but i can defintly tell decrease in it and besides i dont drive my car everyday its more like ever other weekend

 

What's your idle rpm, and what is the vacuum at that rpm?

 

the idle rpm is around 800 to 700 and far as vacuum i dont know

 

You said you had a boost gauge though, how can you not know your vac when it's right there in front of you?

 

never really payed attention to the vac to be honest but i am not 100% sure i think its around .4

 

.4 bar (6 psi)?

You said that it makes "perfect boost" Does that mean it's getting to the peak boost that you were seeing before? Is it taking longer for the turbos to spool at all, or are they building boost like they always have?

Check your couplers in the turbo system. Sometimes they can develop cracks or holes. Boost leak would definitely make your car seem slower. Change the air filter recently?

 

it is making .7bar. but thats what it says i dunno how to convert it into hg.. its around -.6 kpa around their but i will check it out today or tommrow to make sure its around their

 

no the air filters are pretty dirty so thats the next thing i am goin clean is that