well if you have the head machined for flatness you need a thicker gasket, its a must. i have a .020. over marine gasket under my o-rings just becasue i had one laying around still when i rebuilt the engine

 

I would recommend o-rings and a marine .020" over headgasket, as well as re-torqued bolts or studs. What set up are you running to be at 65psi?
Sean

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Depends on your set up. I'd say 38-50 or somewhere in that area.
Sean

 

around here the big 12v guys r just puttin stock headgaskets and studs and runnin up to 60 psi... still holdin, i dont understand how but they r . only use the marine head gasket if u have the head milled if not it will smoke all the time.

 

There is a guy on another forum that talks about torque of stock head bolts. I know one person here who is running 448psi of boost with no problems.

 

448 psi? Typo I assume

 

you wouldnt have a head anymore if it was 448psi. i was hitting 45 easy with a stock head no o-rings or studs. till i put my exhaust break on, then that gave me the excuse for studs and o-ring and port/polished exhaust

 

Yeah, you can re-torque stock head bolts to about 155ft.lbs. You have to take them up pretty slowly though, and I would recommend using new bolts instead of your old ones. Having a bolt snap in the block sucks. The stock bolts do hold quite well, especially if you are running o-rings and a marine gasket.

As for marine gaskets making the truck smoke all the time. Not that I have seen. It does lower compression a little bit, and in theory widens the spray of the injector because you're lifting it higher above the piston. However, if you run a thinner copper sealing washer, or play with your timing a little bit, everything will work out fine. Thats just my opinion though.
Sean

 

when i started the post i was jw cause i was going to bid on a set of twins. and now i won the twins and the guy said he had 370's 10 plate, lazer cut DV's and his 215 pump and was pushing 65 to 70 psi. its an hx35 with banks exhaust housing and an ht3b. i will be running the twins 435's, not sure what my plate is but its from DDP ill take a pic when i pull it out next, my 175 pump, lazer cut DV's since they came in the auction, 4gsk, and what ever needs to be done to the head.

so now that its for sure that im going to need stuff done and you have knowlege on exactly what my truck is gonna have what other than o ringing, studs and marine gasket since i will probably have the head milled would you suggest? im mostly wondering what timing i should run on it

 

i wouldnt use a thicker or marine gasket unless you had to have your head decked for flatness. first it will drop the compression and make it harder to start in the winter and second marine gaskets dont seem to be quite as strong under lots of boost and or timing. just my 2 cents

 

ya only use it if you have decked/ machineing thats the only reason i am using a .020 over isbecaus when i rebuilt the engine i shaved the head and decked the block