LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Torque converter options?

Thread Tools
 
Search this Thread
 
Old Feb 15, 2007 | 10:37 AM
  #1  
Reckless's Avatar
Thread Starter
Super Moderator
20 Year Member
iTrader: (9)
 
Joined: Nov 2001
Posts: 10,060
Likes: 33
From: Canton, GA
Default Torque converter options?

Is anyone making a higher stall converter for these cars? Or is there an alternate GM 258mm converter that has a higher stall?

We are stuffing an LS4/4T65E setup into a Diablo replica (Fiero chassis). We will be eliminating the D.O.D. and adding heads and cam.
Reply
Old Feb 15, 2007 | 02:08 PM
  #2  
Area47's Avatar
TECH Fanatic
 
Joined: Jul 2006
Posts: 1,732
Likes: 0
From: K.C.
Default

zzperformance.com
Reply
Old Feb 15, 2007 | 07:21 PM
  #3  
Reckless's Avatar
Thread Starter
Super Moderator
20 Year Member
iTrader: (9)
 
Joined: Nov 2001
Posts: 10,060
Likes: 33
From: Canton, GA
Default

All I see is converters for the 3800 engines there? The LS4 is a 258mm converter, not 245mm.
Reply
Old Feb 15, 2007 | 09:26 PM
  #4  
Compg's Avatar
12 Second Club
 
Joined: Jul 2006
Posts: 372
Likes: 0
From: Goldsboro, NC
Default

Originally Posted by Reckless
All I see is converters for the 3800 engines there? The LS4 is a 258mm converter, not 245mm.
The LS4 is mated to a 4T65-E(HD) just like the supercharged 3800s. Yes the LS4 and SC3800 uses a 258mm converter and the ones they sale are 245mm(N/A 3800 tranny converter). You have to drill you flexplate to mount a 245mm converter because the stock holes do not line up. Or just buy one from ZZP at the same time for all of $40. People do it every day in the SC3800 world with the same tranny so I think you will be alright.
Tate
Reply
Old Feb 16, 2007 | 08:57 AM
  #5  
eddiemoney's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: Sep 2006
Posts: 716
Likes: 0
From: Eastern Iowa
Default

I would agree with this statement. I would just purchase the convertor and flex plate together and i think they will drop in.
Reply
Old Feb 16, 2007 | 12:17 PM
  #6  
live2ride's Avatar
TECH Apprentice
 
Joined: Oct 2006
Posts: 308
Likes: 0
Default

The stock converter stalls pretty high with the LS4. How much more would you expect from the smaller one with out changing heads and cam?
Reply
Old Feb 16, 2007 | 01:04 PM
  #7  
Reckless's Avatar
Thread Starter
Super Moderator
20 Year Member
iTrader: (9)
 
Joined: Nov 2001
Posts: 10,060
Likes: 33
From: Canton, GA
Default

We are not going radical with the cam, so I think we will see how the stocker works and go from there. Thanks for the answers!
Reply
Old Feb 16, 2007 | 04:05 PM
  #8  
BADDLS1SS's Avatar
TECH Enthusiast
20 Year Member
iTrader: (22)
 
Joined: Oct 2003
Posts: 648
Likes: 0
From: Slinger WI
Default

Go with a pretty mean converter if your gonna change it... Stock is NICE to me and pretty loose. They are about 3200 stall or so.

Id go 3800-4000 with a mid 2 STR, should be enough to be a mean **** down low, but you will give up roll racing punch as the looser converter is more inefficeient at transfering power at those speeds.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo




All times are GMT -5. The time now is 12:34 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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