Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

Flywheel Dimensions ???

Thread Tools
 
Search this Thread
 
Old Apr 15, 2016 | 01:41 PM
  #1  
CasperCasper's Avatar
Thread Starter
On The Tree
5 Year Member
 
Joined: Jan 2016
Posts: 136
Likes: 4
Default Flywheel Dimensions ???

Does anyone have access to the different types of LS1 flywheels and dimensions ? I am trying to do a long crank 6.0L with a super T-10 manual trans and I've had a million mixed ideas about what flywheel etc. to use. I have a truck bellhousing with a Novak adapter ring. I want to just draw things to scale and determine what parts to use. I need dimensions of flywheels however, mainly thickness, mounting face to clutch engagement face offset etc. Does anyone have this info ?
Reply
Old Apr 19, 2016 | 09:34 PM
  #2  
CasperCasper's Avatar
Thread Starter
On The Tree
5 Year Member
 
Joined: Jan 2016
Posts: 136
Likes: 4
Default

Anyone help a brother out here ?
Reply
Old Apr 25, 2016 | 04:02 PM
  #3  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

Before you think about this too much, any thought on what you'll do about starter engagement?
Reply
Old Apr 26, 2016 | 11:50 AM
  #4  
CasperCasper's Avatar
Thread Starter
On The Tree
5 Year Member
 
Joined: Jan 2016
Posts: 136
Likes: 4
Default

Gary

I was told the oem 4.8 flywheel will work as they came with the long crank
Reply
Old Apr 27, 2016 | 09:41 AM
  #5  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

I've heard there are a few of the long crank, manual trans combos out there in 99-00, but have not run across one. I do have the thick 01-07 sachs 1050 flywheel for short crank and a gen II BBC 11" clutch if that helps.
Your best bet might be to get the 99-00 long crank flywheel/clutch combo. Check for starter engagement, then try to find a compatible 26 spline disk.
Reply
Old May 1, 2016 | 06:39 PM
  #6  
jmd's Avatar
jmd
TECH Addict
20 Year Member
Photogenic
Liked
Loved
iTrader: (4)
 
Joined: May 2002
Posts: 2,620
Likes: 36
From: T56th Street, Aridzona
Default

Originally Posted by garys 68
I've heard there are a few of the long crank, manual trans combos out there in 99-00, but have not run across one.
And you never will. All flywheels in LS trucks were short crank compatible. All else was flexplates.

Let's not pass along steaming piles that will be repeated.
Reply
Old May 2, 2016 | 07:26 AM
  #7  
garys 68's Avatar
TECH Junkie
15 Year Member
Photogenic
iTrader: (1)
 
Joined: Dec 2007
Posts: 3,724
Likes: 39
From: Camdenton, MO
Default

Rarer than hens teeth?
I did run across this at Novaks site a while back indicating long crank 4.8 flywheels, but again, I've never seen one. Not holding my breath either.
https://www.novak-adapt.com/knowledge/gm-crank-spacing

Originally Posted by jmd
And you never will. All flywheels in LS trucks were short crank compatible. All else was flexplates.

Let's not pass along steaming piles that will be repeated.
Reply
Old May 2, 2016 | 10:32 AM
  #8  
CasperCasper's Avatar
Thread Starter
On The Tree
5 Year Member
 
Joined: Jan 2016
Posts: 136
Likes: 4
Default

Pioneer makes a flywheel i believe fw101 for a 99 4.8l but i have no idea if it works. Thanks for all the input guys
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Aug 2, 2016 | 11:09 PM
  #9  
CasperCasper's Avatar
Thread Starter
On The Tree
5 Year Member
 
Joined: Jan 2016
Posts: 136
Likes: 4
Default

Ok now I'm a little creeped out. My buddy told me he has a flat flywheel which has a .4in spacer in it. He brought it over and we removed the spacer. We bolted it up to my motor and held the starter in place. It looks like it will engage perfectly. Checkout this drawing I made. GM part number is 12561758. Anyone have any comments here ? Does this look promising ??
Name:  flywheel_zpsqpf1sfif.png
Views: 3928
Size:  9.4 KB
Reply




All times are GMT -5. The time now is 05:45 AM.

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