Head work?
 

What kinda head work needs to be done to handle 65psi? Will just studs do it or do I need more?

I've heard of just going and re-tightening your stock studs and you can handle a bit more, does anyone know about how much the head can handle with just re-tightening stock studs?

o-rings on the head will handle 65psi with a stock gasket and studs but thats about the limit im having the block and head o-ringed.

so o-ring the head and stock studs? or aftermarket studs?

Stock, they are "bolts" not studs. :w2:

whats a ball park figure on how much it will cost to get it o-ringed:humm:

I am more concerned on who will do it. No one in nh does that stuff.

i got my head o-ringed for $250. i have o-ringed and ported/polished head and am running 12mm arp studs with a .020 over marine gasket

how many PSI should one expect to have when running around 400rwhp

dont mater about psi it depends on the size of the turbo. you can have the stock turbo at 30-35psi making 400hp or you can have a aftermarket big turbo making 20-25psi paking 400hp it all depends on what you got for modifications

if im going to o ring it and have studs should i just be putting back on a stock thickness gasket or something a little thicker? is there a benefit for using a thicker gasket or different gasket then stock?

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 lol. 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

A short drive from NH down into Mass and you will find Scott Hovey's MassDiesel shop.If Scott can not do the work then no one can in New England.

MassDiesel Home

If nothing is taken off the head when it is done(and I highly doubt that will happen as every used head off a 6BT is off enough to redeck)you will loose a tad of compression with a .020 marine gasket.The marine gasket is stronger than the original and will take as much abuse as you can give it IF the head is installed and the PROPER retorques are done.As for cold weather starting,mine has had a .020 gasket on it since the first head job and I run with more than 20 drgrees of timing with no cold start issues.The truck is my daily driver and it sits out all night long during the winter with no aid of being able to plug it in and when I come out,cycle the grids and twist her off she lights and goes.

i would have to agree, i think them marines are strong and have little to no effect on cold starts. i havent noticed any differnet whith running mine

Definite typo on my part.:argh:

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quote=94cummins12v;336795]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[/quote]
Why did the install of an exhaust brake give the excuse of o-ring of the head? Has to be more to the story than that.

Why did the install of an exhaust brake give the excuse of o-ring of the head? Has to be more to the story than that.[/QUOTE]

if i remember he installed the exhaust brake and ended up popping the head gasket shortly after.

hey guys i was thinking of head work myself i hear alot of people using cometic gaskets what are the pros and cons to using one

if i remember he installed the exhaust brake and ended up popping the head gasket shortly after.[/QUOTE]

yepers that was the issue so when i pulled the head i had it o-ringed, ported and polished and orderes a set of ARP studs