6.0LSX-C10

What's up guys I am new to this forum. I drive a 1983 c10 that is running a newly built carbed lq4 and an M20 4 speed. The motor runs great, but lacks bottom end torque because of my 31in tires, 3.42 rear gear, and Edelbrock 2216 cam. I used the sachs 1050 flywheel and all is good, but I am worried that the flywheel bolts were short. I searched and searched to find what blots to use and many said to use either the arp 330-2802 or ARP Pro Series Flexplate Bolt Kits 244-2901 or GM flywheel bolts...#11569956, which I used. Here is one of the threads https://ls1tech.com/forums/conversio...050-bolts.html. I just don't want what happen to the guy in this thread had happen to happen to me. Here is the link http://www.pirate4x4.com/forum/gener...ge-inside.html.
Thanks for your help in advance!!!

stevieturbo

How far did your bolts extend through the flywheel ?

garys 68

iTrader: (1)

If you used the GM bolts for the manual trans truck flywheel, you'll be fine. I've used them for the sachs truck flywheel a LS1 flywheel.

6.0LSX-C10

From what I remember they stuck out about half way. The crank flange was tapped all the way flush to the flange. I was worried about not having the recommended 16.5 mm of thread engagement for an 11mm bolt. That is roughly .65in. The bolts I used had .800 UHL that means the flywheel would roughly have to be .150 thick, and I known that it was like .400in or a little less thick. So I think about half of the bolt is engaged.

6.0LSX-C10

How long were the bolts that you used (garys 68)?

stevieturbo

half way is very descriptive as far as length goes

If you're saying there is only 11mm of thread engagement in the crank, then I cant say I'd be overly happy with that, although it probably is ok.

Most nuts would only be around that thickness and they offer sufficient strength when used.
16.5mm wherever you got that number from would sound better, probably more than is really needed though

Quite honest though, I've never measured factory or ARP bolts, or had any concerns when screwing them in, so not sure how long they are or far they engage.

garys 68

iTrader: (1)

No idea. I just trust GM puts the correct length bolts. I think the same bolt cross references to Camaros, Corvettes, etc.
On a stock motor, I don't see much advantage in ARPs.
Btw, the crank flange is drilled all the way through to the 7/8 journal. Thinking too long might present some interference issues.

6.0LSX-C10

The bolts probably had .400in of engagement. So I should be okay. Thanks for the reassurance. I just wanted some opinions before I raise my rev limiter and beat on it a little.