lt4 "peakiness" normal?
Thread Starter
Racer
Joined: Dec 2000
Posts: 300
Likes: 0
From: Fairfield CT
lt4 "peakiness" normal?
My lt4 does something weird at about 4800 rpm and again at 5500 ish.
It like, hesitates a second, then revs FASTER than it did before.
The car doesn't miss or anything, just kinda pauses, then revs faster than it did up until 4500-4800 ish to red line. like boost engaging.
Perhaps it's a diff cam, doesn't feel like any of the the lt1's i've driven, maybe a hot cam the previous owner installed and didn't tell me?
Any one with a similar situation lemme know. Not that i mind the sudden surge of power, but it just feels wierd for an naturally aspirated car with a suposedly stock cam.
[Modified by Snackdragons, 6:50 AM 3/16/2003]
It like, hesitates a second, then revs FASTER than it did before.
The car doesn't miss or anything, just kinda pauses, then revs faster than it did up until 4500-4800 ish to red line. like boost engaging.
Perhaps it's a diff cam, doesn't feel like any of the the lt1's i've driven, maybe a hot cam the previous owner installed and didn't tell me?
Any one with a similar situation lemme know. Not that i mind the sudden surge of power, but it just feels wierd for an naturally aspirated car with a suposedly stock cam.
[Modified by Snackdragons, 6:50 AM 3/16/2003]
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: lt4 "peakiness" normal? (Snackdragons)
Even with a hot cam you wouldn't feel anything like that. A hot cam in an otherwise stock motor still leaves a very smooth power curve. After you add headers it throws a nice jump in there around 3500 rpm's but there's still no hesitation to it.
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
Re: lt4 "peakiness" normal? (LT4BUD)
Definitely not normal!!!
Smooth, strong rush to redline. Like a big electric motor on steroids.
Larry
code4coupe
:seeya
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: lt4 "peakiness" normal? (Snackdragons)
...just kinda pauses, then revs faster than it did up until 4500-4800 ish to red line. like boost engaging....
Eric
Thread Starter
Racer
Joined: Dec 2000
Posts: 300
Likes: 0
From: Fairfield CT
Re: lt4 "peakiness" normal? (silver & red CE)
yeah, i've had my opti go before already, but this one has like 10 thousand miles on it. i drive it in winter and rain etc... so mine dont last long, fortunately my warranty covers the opti-suck, and sometimes even plugs and wires if i can claim they broke cuz of optispark failure.
I'm thinking it's that or plugs/wires. I'll do it in spring, along with all the other maintenance.
I'm thinking it's that or plugs/wires. I'll do it in spring, along with all the other maintenance.
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Joined: Feb 2003
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From: T.Dot ON
Re: lt4 "peakiness" normal? (Black96Corvette)
Id bet on the wires. I have 2 olds auroras (ok, theyre Mom and Dads not mine). after about 25k miles the cars they seems to sputter slightly at around 3500 and then pull hard to redline. Every time its the wires on the back 4 (by the firewall). seems they just cant stand the heat. This solved it every time so far for that car... its just a guess but maybe theyre dying.
Thread Starter
Racer
Joined: Dec 2000
Posts: 300
Likes: 0
From: Fairfield CT
Re: lt4 "peakiness" normal? (Black96Corvette)
Nice car! Not sure if I met you today... but I think so. I love the LT4
hit me up on aim or yahoo messenger "snackdrag" if you ever wanna cruise around. I'm like 15 minutes from milford.