LT1-LT4 Modifications 1993-97 Gen II Small Block V8

95 TA...15.4@90mph!!??!?!?!

Thread Tools
 
Search this Thread
 
Old May 12, 2009 | 08:40 PM
  #1  
dre2013's Avatar
Thread Starter
TECH Resident
iTrader: (7)
 
Joined: Jun 2005
Posts: 773
Likes: 0
From: Akron OH
Default 95 TA...15.4@90mph!!??!?!?!

ok. friend of mine has a 95 TA, 90k miles, a4, all stock with an exhaust cutout and an air intake. heres the story:

The car used to have an sts rearmount on it..blew a ringland on the stock motor. Had the motor rebuilt with forged pistons and was SUPPOSED to have ported heads and a small cam, but the backyard hilljack who did the work put the STOCK heads and STOCK cam. So after running with the turbo at about 4psi he pulled the turbokit off and it is just stock now. Ever since he had the motor rebuilt the car hasnt been running 100% for the most part. He had a mailorder tune done after the turbo was taken off. The car has no power above 4k rpm, and ran 15.4@90, when before the motor was redone all stock it ran 13.8@100. any ideas?
Reply
Old May 12, 2009 | 08:43 PM
  #2  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by dre2013
ok. friend of mine has a 95 TA, 90k miles, a4, all stock with an exhaust cutout and an air intake. heres the story:

The car used to have an sts rearmount on it..blew a ringland on the stock motor. Had the motor rebuilt with forged pistons and was SUPPOSED to have ported heads and a small cam, but the backyard hilljack who did the work put the STOCK heads and STOCK cam. So after running with the turbo at about 4psi he pulled the turbokit off and it is just stock now. Ever since he had the motor rebuilt the car hasnt been running 100% for the most part. He had a mailorder tune done after the turbo was taken off. The car has no power above 4k rpm, and ran 15.4@90, when before the motor was redone all stock it ran 13.8@100. any ideas?
I'd perform a compression and leakdown test to access the health of the engine.
Any codes?
From there I would check the plugs & wires.
Clean the MAF.
Test the o2's with a scanner.
How's the fuel pressure?
Reply
Old May 12, 2009 | 08:53 PM
  #3  
gregrob's Avatar
TECH Senior Member
iTrader: (8)
 
Joined: Sep 2008
Posts: 5,130
Likes: 4
From: 6,000+ feet
Default

Hilljack probably jewed the motor all up.

ss gave u some good things to start out with.

How do u know the pistons are stock? Maybe it is lower compression... That would kill the power
Reply
Old May 12, 2009 | 09:17 PM
  #4  
za355tx's Avatar
TECH Resident
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (109)
 
Joined: Dec 2007
Posts: 994
Likes: 2
From: Dfw
Default

If it's built for a turbo but it doesn't have a turbo that's what they call a low compression turd.
Reply
Old May 12, 2009 | 09:43 PM
  #5  
My95Z's Avatar
TECH Regular
iTrader: (8)
 
Joined: Mar 2009
Posts: 475
Likes: 0
From: Maryland
Default

Originally Posted by ss.slp.ls1
I'd perform a compression and leakdown test to access the health of the engine.
Any codes?
From there I would check the plugs & wires.
Clean the MAF.
Test the o2's with a scanner.
How's the fuel pressure?
Check out all of these, but I'd be leaning more towards one of those two.

It could be a lower compression engine, but I doubt it would run that slow even with 9:1 compression, you're about a second and a half off. But then again if it depends what it is tuned for and what is actually in there.

What about the valve spirngs are they in decent shape?
Reply




All times are GMT -5. The time now is 02:37 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE