uneven power curve....
Thread Starter
Drifting
Joined: Jul 2003
Posts: 1,613
Likes: 0
From: Orlando FL
uneven power curve....
under 2500 (or so) RPM the car is fast and powerful, then over that its UBER fast and slap your butt powerful!
seems like the car is suddenly saying "oh, you want more?"
thats all find and good unless you are making a right turn out of a parking lot, pedal down and this lil wake up happens. amazing how quickly the car gets VERY sideways. (and how quickly you can recover)
i guess the question is whether or not this is a L98 characteristic, or if it can be smoothed out with not too expensive mods, or if there is a problem to be looked into.
seems like the car is suddenly saying "oh, you want more?"
thats all find and good unless you are making a right turn out of a parking lot, pedal down and this lil wake up happens. amazing how quickly the car gets VERY sideways. (and how quickly you can recover)
i guess the question is whether or not this is a L98 characteristic, or if it can be smoothed out with not too expensive mods, or if there is a problem to be looked into.
Melting Slicks
Joined: May 2004
Posts: 2,286
Likes: 2
From: Stamping Ground KY
If you're not experiancing lunging (like the power goes away, then the power kicks in), I'd guess it's just a by-product of your muffler system and chip (gutted cats will improve top end, but could steal some from the bottom), although my guess would have been that your mods would actually give you a more even power distribution... I'm certainly no pro...
Thread Starter
Drifting
Joined: Jul 2003
Posts: 1,613
Likes: 0
From: Orlando FL
the problem is the unpredictable slap on the butt. its like 2 different cars. and if you just so happen to cross this threshold in the middle of a turn, the added torque lights the tires. then its tight sphincter and creative steering time. the power curve just does not seem to be smooth at all. nothing nothing nothing....BLAM!
would long tube lingenfelter headers help?
would long tube lingenfelter headers help?
Melting Slicks
Joined: May 2004
Posts: 2,286
Likes: 2
From: Stamping Ground KY
I would think headers would make it worse.
Here's my 100% uneducated guess:
Since the L-98 is notorious for starving at higher rpm, and your car doesn't have this issue, I'd say that she's running super rich (that's more than pig rich) and therefore is getting more neutral (not lean, per se, just less rich) as you get up in rpm and this is causing the powerband spike. If the car seems to bog down a little during stoplight launches (from idle), that would help my argument.
Anyway, a dyno would really be a good idea, you'll learn a lot about your car and won't have to guess as to what's going on...
Here's my 100% uneducated guess:
Since the L-98 is notorious for starving at higher rpm, and your car doesn't have this issue, I'd say that she's running super rich (that's more than pig rich) and therefore is getting more neutral (not lean, per se, just less rich) as you get up in rpm and this is causing the powerband spike. If the car seems to bog down a little during stoplight launches (from idle), that would help my argument.
Anyway, a dyno would really be a good idea, you'll learn a lot about your car and won't have to guess as to what's going on...
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Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by Orlando85UCFvette
the problem is the unpredictable slap on the butt. its like 2 different cars.
would long tube lingenfelter headers help?
would long tube lingenfelter headers help?
RACE ON!!!
Racer
Joined: Sep 2004
Posts: 495
Likes: 0
From: berwick pennsylvania
i have this problem as well. i am gonna try replacing the
tps. i feel what you have stated if i go slowly thru rpms in
every gear it kinda hits a dead spot then grrrrrrrrrrrrrrr lets run.
so my next logical would step would have to be check the tps.
i dont plan on this till i have the motor apart in feb.-mar., so if you descide to try this gimme a shout and let me know how you
make out. good luck
tps. i feel what you have stated if i go slowly thru rpms in
every gear it kinda hits a dead spot then grrrrrrrrrrrrrrr lets run.
so my next logical would step would have to be check the tps.
i dont plan on this till i have the motor apart in feb.-mar., so if you descide to try this gimme a shout and let me know how you
make out. good luck
