stock head stud limit?

[91-gsx]

I was wondering what the limit of the stock head studs are? I am planning to run a sc6152 and have arp head studs that have not been installed yet. I wanted to install them when I put cams in, but also dont want to risk my head gasket and engine by using the stock studs. I know it would be safer to install them now, but I still would like to know how much boost and how big of a turbo some of you are getting away with using the stock head studs.
thanks for the help

 

[blackGSX2g]

If you do them one at a time, you can replace the stockers with ARPs without taking the head off. I re-torqued mine that way about 6 months ago. Some people may disagree, but it worked fine for me. Just be aware that worst case senario is that you need a new $30 head gasket and a few hours of time.

 

[black12]

ive pushed 26 psi on stock headgasket with stock headstuds torqued down to about 90+lbs
i will be pushing the limits even more when i put on my bigger turbo

 

[91-gsx]

I did 25 psi on the 14b with the stock head studs and gasket, but I was told that 25psi on a big turbo like my sc6152 will easily blow the head gasket without arp's. I was wondering if this is true?
thanks for the help

 

[CanadianTSi]

I'm pretty sure the Colt that put down 708WHP was usuing the Stock headstuds.

 

[91-gsx]

I'm pretty sure the Colt that put down 708WHP was usuing the Stock headstuds.

See, I hear things like this all the time, yet people still believe that I will blow something without the arp's in there. The arp's are stronger and they do not stretch, but what would cause the stock studs to stretch other then extreme knock or something?
thanks for the help, maybe we can get rid of some sort of misconception or clarify the reasoning behind it.

 

[andymoraitis]

I'm pretty sure the Colt that put down 708WHP was usuing the Stock headstuds.

Ty: If I remember correctly that was a stock composite gasket with ARP's.

How much the head studs can handle is heavily dependent on the quality of tune. A 14B doesn't create nearly as much cylinder pressure as a 6152. That being said, knock on the smaller turbo would have to be nasty to lift the head but with the larger turbo it wouldn't take as much knock to lift it. I would recommend the stock gasket with ARP's as simple insurance and peace of mind.

Install them as Matt mentioned (one at a time) and step torque them. Run the motor through a heat cycle and then torque them again. I run a stock HG on ARP's torqued to 90 lb/ft at 27 psi daily and the combination has worked like a champ.

Just my .02,

Andy

 

[nanokpsi]

I made close to 430whp on pump on a stock hg and head bolts on my stock motor set up and pt67. I also ran an scm6152e at 28 psi and made right at 400whp on c16 (stock intake mani) proir to bolting on the t4 set up and magnus mani.

 

[timloomis]

A guy on our local forums has over 700 whp and runs 10's on arp's and a stock mitsu headgasket.He has a good argument,which would you rather break if something goes wrong?A blown headgasket or a busted piston/rod.

 

[fwdeclipse]

I run 25psi on stock studs and gasket with my 60trim.

 

[11secDSM]

I ran 31psi and over 400whp on stock studs and HG in my old Talon on a 60 trim without issues.

 

[droppinbottom]

Bottom line is that it all comes down to your tune. Local guy here runs 28psi daily on stock hg and stock head studs.

 

[1997hciv]

Bringing back from the dead...

So what is considered a good tune? I know ~11.1 afr is good but else would be considered a "good" tune. I will be installing Link, 850's, S256, 255hp, fmic, and fp intake, not to much longer fp2's, and AFPR.

What I am wondering is if I could just torque the stock studs when I install the cams by going through the springs. I am looking for 400hp just like everyone else on this thread

Oh and my compression is about 175-180 across the board.

Thanks

 

[CanadianTSi]

Very minimal knock is considered a good tune.

 

[1997hciv]

Yea thats what I figured...get as much timing without any knock...Im guessing this is pretty hard to do, but hopefully I can get used to Link quickly so I can get my car to where I want. Thanks