Fast 95 Z28

Was wondering if I can run this headgasket on my 408 LS3 headed build? 4.060 bore. http://www.summitracing.com/parts/TFS-30694060-045/

Fast 95 Z28

Engine is a LQ4... with pistons .005-.007 out of the hole, bored .030" over

98hc4mula

iTrader: (5)

Yes. That's fine. What are your heads specs? I'm going to run a 4.160 408 with 230 AFR heads to clear the head chambers

Fast 95 Z28

Stock 821 castings, LS3 69.8cc chambers

Fast 95 Z28

anyone else' opinions?

gectek

iTrader: (2)

No that is not fine. You need at LEAST 4.065 bore. You will have to run a 4.080-4.085 bore gasket. If you do not the gasket will leak.

Fast 95 Z28

why won't it seal? I thought .030" over the bore size was recommended?

Fast 95 Z28

i asked texas speed if i could run the 4.060" gasket and Aaron there said it would be okay. I'm just confused now since he said it would be fine and the other person told me it needs to be 4.080". I need more input on this!

ssnovaturbo

iTrader: (19)

Ls9 headgasket. Thats whats in my 408 and most of the other ones on here

Fast 95 Z28

thanks, do they make an LS9 gasket at .045" compressed thickness? Still want a .045" gasket.

ssnovaturbo

iTrader: (19)

I think the ls9 is close to that... iirc its .050

MikeFSKSpeed

iTrader: (37)

We use Cometics in our engine shop, 4.130" bore in either .027/.040/.051 on 408 builds. Nothing but great luck!

gectek

iTrader: (2)

Because the chamber size is a tad bit bigger or right on the edge of 4.060 as it is. The fire ring may not seat well. As Jesse at Scoggin Dickey, they sell them all the time.

Fast 95 Z28

Would this gasket work? http://www.summitracing.com/parts/FEL-1041/ and is .034" quench running it to close on a street 408? i measured my pistons and they range from .005-.007 out of the hole.

gectek

iTrader: (2)

Why are you so against the cometics? You should use a 4.085 gasket in any thickness you want. Thats it. As long as you abide by that you are ok. No need to complicate it with a 4.100 or larger gasket, you have the answer in front of you. SD can get you the gasket you need.

Fast 95 Z28

I'm just under a budget and wanted to order everything from the same site to same all the hidden shipping costs. I'll prolby just end up ordering the Cosmetic LS1 4.085" gaskets from texas speed.

gectek

iTrader: (2)

FYI you can order everything you could ever want from Scoggin Dickey.