so I've been messing around with the DCR calculator, now I have a question or two....
08-15-2008, 06:45 PM
#1
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so I've been messing around with the DCR calculator, now I have a question or two.... setup: 347
Forged LS6 block
6.125 callie rods and 3.905 diamond flat top -2valve relief pistons
LS6 heads stock combustion cc's and stock valves
.040 cometics
228/588 112 comp cam
ARP head bolt kit
what I'm wanting to do is mill the heads because my DCR sucks *** right now. playing around with the DCR calculator from this link ( https://ls1tech.com/forums/showthrea...dcr+calculator ) it shows I need to mill my heads to 59cc and advance my cam 2 degrees using the same head gasket thickness I have.
now, my question is, since the motor has about 6,000 miles on it and the heads will be milled so they will be completely flat.... is there another type of head gasket out there BESIDES MLS that I can use and will be a .040 thickness since the deck of my block COULD be...not completely flat? I've already reused my cometics once and sprayed copper spray on them so no matter what I will be getting new head gaskets. I kinda like the idea of using graphite because it seals so well plus it's kind of extra insurance if I do decide to spray and the pressure doesn't want to be in the chamber anymore lol.
I have done some checking around and it seems pretty much that is all there is, MLS. If u know of any other type of gasket out there that is .040 and not MLS PLEASE let me know.
Forged LS6 block
6.125 callie rods and 3.905 diamond flat top -2valve relief pistons
LS6 heads stock combustion cc's and stock valves
.040 cometics
228/588 112 comp cam
ARP head bolt kit
what I'm wanting to do is mill the heads because my DCR sucks *** right now. playing around with the DCR calculator from this link ( https://ls1tech.com/forums/showthrea...dcr+calculator ) it shows I need to mill my heads to 59cc and advance my cam 2 degrees using the same head gasket thickness I have.
now, my question is, since the motor has about 6,000 miles on it and the heads will be milled so they will be completely flat.... is there another type of head gasket out there BESIDES MLS that I can use and will be a .040 thickness since the deck of my block COULD be...not completely flat? I've already reused my cometics once and sprayed copper spray on them so no matter what I will be getting new head gaskets. I kinda like the idea of using graphite because it seals so well plus it's kind of extra insurance if I do decide to spray and the pressure doesn't want to be in the chamber anymore lol.
I have done some checking around and it seems pretty much that is all there is, MLS. If u know of any other type of gasket out there that is .040 and not MLS PLEASE let me know.
08-15-2008, 08:57 PM
#3
I do not know if it is an issue or not but have you checked into how well a graphite gasket will hold up to the heat and compression compared to a MLS?
I myself would prefer MLS ( but have no data to back it up ) just always been a fan of factory MLS gaskets.
If you are going to run .040 gaskets though you need to make sure your quench height is in check by checking piston out of the hole too, very important part of your DCR equation.
I myself would prefer MLS ( but have no data to back it up ) just always been a fan of factory MLS gaskets.
If you are going to run .040 gaskets though you need to make sure your quench height is in check by checking piston out of the hole too, very important part of your DCR equation.
08-16-2008, 03:07 AM
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my piston out of the hole should be .01 instead of the factory .006, so I have been told since of the different rod length...and pistions? I'm guessing that is one reason the typical aftermarket flat top piston has -2cc valve reliefs, and to run a bigger cam w/o flycutting.
