C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LOOKS FAST!, runs slow

Thread Tools
 
Search this Thread
 
Old Mar 24, 2010 | 01:51 PM
  #21  
LTxDave's Avatar
LTxDave
Safety Car
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 1999
Posts: 3,946
Likes: 63
From: Marianna FL
Default

If you have Nitto drag radials, you will have great traction on the street (unless its cold out). My Goodyear GS-D3's spin easily on the 95. The Nitto drag radials I had on my 96 (6 speed with 4.10's) would almost dead hook on the street in warm weather.
Reply
Old Mar 24, 2010 | 02:19 PM
  #22  
1973Jasonr's Avatar
1973Jasonr
Thread Starter
Instructor
 
Joined: Apr 2009
Posts: 140
Likes: 0
From: Lees Summit Missouri
Default

We have the same wheels Tombrammer, just different color. I also notice you have mud guards on. I've been thinking about putting some on myself. You car looks sweet. Great photos too.

I'm kind of thinking you might be right about the tire spin. I probably should have purchased a manual transmission if I really wanted tire spin.
Reply
Old Mar 24, 2010 | 10:30 PM
  #23  
1973Jasonr's Avatar
1973Jasonr
Thread Starter
Instructor
 
Joined: Apr 2009
Posts: 140
Likes: 0
From: Lees Summit Missouri
Default

Ok, I did the fuel pressure test and I she idles at 35 PSI and jumps to 45 PSI while revving. Its dropping pressure when I turn the car off. In fact its been 3 hours and the fuel pressure is reading zero. Can this be right? Do you guys have any thoughts on these numbers?
Reply
Old Mar 24, 2010 | 11:07 PM
  #24  
tombrammer's Avatar
tombrammer
Pro
10 Year Member
 
Joined: May 2008
Posts: 670
Likes: 56
Default

Thanks for the compliments on my vett! I got those mud guards off ebay, the first mod I did and a good one too. You have something wrong with that fuel pressure of only 35 at idle, it should be 40 and it shouldn't bleed off to 0 in a few hours, mine runs 40 at idle and drops only to about 20-25 overnight. It could be injectors leaking, maybe that is why you don't have much power. Watch the injector vids at the beginning of the tec forum, lots of good info there. I just put new injectors on my car and wow what a difference, runs smoother, stumble gone that came in around 1800rpm, you can talk to Jon at Fuel Injector Connection for questions. It could be your fuel pump leaking and not holding pressure too, I'm not sure how you check that but you can check your injectors with an ohm meter. Hopefully someone else will chime in.
If you want wheel spin you need to do 3.45 gears and a stall then you'll be able to burn them all you want! I used to have a 60 elcamino with a 400 small block, alum heads, headers and 411 gears, I loved roasting the tires with that car, but the vett I like much more, just a different mind set. I know my vett is much faster than that elcamino even though it had tons more hp.
Reply
Old Mar 25, 2010 | 10:27 AM
  #25  
1973Jasonr's Avatar
1973Jasonr
Thread Starter
Instructor
 
Joined: Apr 2009
Posts: 140
Likes: 0
From: Lees Summit Missouri
Default

Thanks Tombrammer,
It sounds like you had the same problem I’m looking at. I will do some more testing on the fuel pump. I didn't get a chance to take it out last night and run her with the fuel pressure tester. So I'm not sure what my pressure will be when it’s out of open loop. The fuel pressure could drop some more. I will say I don’t have any difficulty starting her; the fuel pressure is always there.
Reply
Old Mar 25, 2010 | 12:42 PM
  #26  
RC000E's Avatar
RC000E
Le Mans Master
 
Joined: Sep 2009
Posts: 6,937
Likes: 348
From: My interests are mobile
Default

Fuel pressure is fine....move on. Its not uncommon for the pressure to bleed within 3 hours. Heck I've seen cars bleed a heck of a lot quicker than that, and they still ran perfectly. The pressure drop may indicate a slight lack of efficiency in the system, but the point is, if the pressure is maintained by the pump when the car is running and dropping vacuum (i.e. increasing pressure) the system is working properly.
Reply
Old Mar 25, 2010 | 05:51 PM
  #27  
TLS_Addict's Avatar
TLS_Addict
Team Owner
 
Joined: Oct 2007
Posts: 26,745
Likes: 694
From: PA
Default

My car does this once in a while.

The hesitation happens in a few instances.

1. I am lugging in a gear and going up a steep incline.
2. I hammer on it and it bucks for a second and takes off.
3. Lugging down the road under 2500rpms and the cruise on.

It has done it twice in the last 400 miles. My car is 100% stock other than the 1-4 skip shift eliminator. It has the stock plugs and wires still on it...lol I have the plugs and wires and plan to change out the fuel filter as well. I did clean on the throttle body for about 30 minutes and actually it seemed to really help with throttle response.
Reply




All times are GMT -4. The time now is 04:53 PM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-4
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-5
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-6
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-7
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-8
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-9
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE