willizm

iTrader: (10)

Wasn't sure if this was possible or if the bore size is different. Trying to figure out what my best option is for head gaskets on a stock block ls1 running 8-10lbs of boost. I'm also getting ARP rod and head bolts for extra security.

stevieturbo

How about stock GM MLS LS1 gaskets....

I know its a long shot !

willizm

iTrader: (10)

Ok, then for a boosted engine is the GM LS1 MLS sufficient for 10lbs max? What thickness is ideal. .056 or .051?

willizm

iTrader: (10)

Something like this?

http://www.summitracing.com/parts/NAL-12498543/

skinnies

iTrader: (33)

Do arp head studs and I run the ls9 gasket on my 5.3 with no issues.

willizm

iTrader: (10)

^isn't the bore diameter something like 4.090 for those ls9 gaskets? Is that going to be an issue with a ls1 with 3.9xx bore? I wouldn't mind using them, they seem cheap enough. The studs are a good $100 more. Is there a benefit to having them if only pushing around 16-17lbs down the road?

XtremeDime

iTrader: (16)

Youll be fine with ls1 MLS gaskets and GM head bolts at 10psi.

pdasterly

iTrader: (4)

i run them with no problems

stevieturbo

You'll hardly find much cheaper than factory GM gaskets, and plenty of people pushing more than 16psi with them.

Unless you have very good reason for not using studs.....use studs.

rotary1307cc

iTrader: (5)

run the LS9's, bore is 4.1 on those

willizm

iTrader: (10)

I'm also considering getting the 317 heads along with the ARP studs just to help bring down the compression. If I go that route is there going to be an issue with the bore size on an ls1 using those heads and what gaskets would you run with the 317's?

Mike454SS

iTrader: (4)

If the LS9 gaskets (or any of GM's other MLS choices) where a thickness that'd work with my built bottom end and head combo to set my CR and quench I'd have them already...but I need 0.040 thick, so I have to spend more and go with Cometics...oh well.