quickkris2006

iTrader: (8)

I'm building a 5.3 with a turbo. And want to order all my gaskets now so once the motor is back from the machine shop I can re assemble.. I read somewhere on here that I should get copper head gaskets? So that they expand with the head with boost pressure ?? Others have said just spray the the copper sealer on the head gaskets? So just looking for opinions.. and links to where I can buy them

quickkris2006

iTrader: (8)

Also want to know what the thickest gasket I can run. I'm running hand ported 317 heads with studs

Beatdown Z

iTrader: (18)

Any GM MLS head gasket along with some head studs will work just fine. Why are you using 317's? They kill the compression ratio.

Beatdown Z

iTrader: (18)

How serious is this build? Stock bottom end?

quickkris2006

iTrader: (8)

I'm using the 317s to drop the compression ratio for boost.. my studs already came in and I'll probably end up going with ls9 head gaskets

vettewreck

iTrader: (1)

Everything ive read on here, from the simple low boost turbo build to 800rwhp+ 20lbs of boost are all using the LS9 head gaskets. I just bought my LS9s.

BottleFedZ346

iTrader: (17)

Stock 5.3 MLS gaskets will work, been 8's and made over 850+whp on them with no issues!

a-low

iTrader: (26)

[QUOTE=BottleFedZ346;18014049]Stock 5.3 MLS gaskets will work, been 8's and made over 850+whp on them with no issues![/QUOT

+1 I'm running stock ls1 gaskets set paid 30.00 bux

LS1NOVA

iTrader: (12)

Stock MLS LS1 3 layer gaskets didnt hold on mine at 950whp and 28lbs, lifted the heads and coolant pushing at top and bottom of cylinders.

Switched to LS9's and had no trouble after that.

Now switching to TFS220 heads and I didnt like the larger 4.100 bore on the small bore of the 5.3 so now using Trick Flow 3.945 bore gaskets. Havent ran it yet but they look nice and are much closer to the correct bore size. Extra material cant hurt.

Modchevelle

iTrader: (9)

Where do you get those gaskets and what about bore size?

LS1NOVA

iTrader: (12)

Are you asking me?

Summit, Jegs, etc.

Forcefed86

iTrader: (4)

I wouldn't spray anything on an MLS head gasket. They are installed dry for a reason. If you want lower compression cometic makes MLS gaskets any thickness you want really. I've seen as thick as .075 on the shelf that aren't considered "custom". I've run as thick as 3mm (.11") head gaskets with no problems at 34+psi. (not on an LSx)

Running less compression isn't a bad thing IMO. Leaves you a wider area for errors in the tune and makes the motor less detonation happy. I went 8's on 25lbs of boost with my JY 5.3. Dished pistons, LS9 gasket, 317 heads. 8.6:1 compression. A full point of compression is only worth about a 5% hp gain NA.

quickkris2006

iTrader: (8)

ill be going with the ls9 gaskets.. found them cheapest at scotty dickens