CasperCasper

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 ?

CasperCasper

Anyone help a brother out here ?

garys 68

iTrader: (1)

Before you think about this too much, any thought on what you'll do about starter engagement?

CasperCasper

Gary

I was told the oem 4.8 flywheel will work as they came with the long crank

garys 68

iTrader: (1)

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.

jmd

iTrader: (4)

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.

garys 68

iTrader: (1)

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

CasperCasper

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

CasperCasper

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 ??