I have a goal of 600 on e85.

I have a motor with 25k on it. No issues.

Is it possible to pull one at a time and torque 1 at a time in sequence without removing the head ? It's clearly a lot more work removing the head and want to know the success rate of people using this method. I've heard of it working. But want the experts .02

I do realize its a used HG but hey I might as well ask. But I've also heard of some stock head bolts holding 600 and of some not. So.

 

I've heard of it working and of it not also.

 

I've heard of it but never done it.

 

i wouldnt bother changing the studs unless you want to put in a thicker head gasket or something. 600hp on stock motor shouldnt be a problem.

 

I thought 600 was too much for headbolts ?

 

If I can run 600 with oem head bolts then problem solved. I just need that to be confirmed

 

Realstreet ran over 800hp for a long time on an uncracked block with stock studs. It eventually lifted just enough to pop a freeze plug, but nothing serious. The F-20 is very capable in stock form aside from the stock retainers. If you do replace the studs I wouldn't replace with a thicker head gasket as mentioned above. OEM gasket is plenty strong and having stronger studs just gives you extra security.

 

head can lift @ over 30psi.

i would not pull the studs one at a time. very ghetto. pull the head, replace the studs, then reinstall the head.

however, i wouldnt do any of that for 600whp.

 

So at 590 headbolts are cool ?

 

I thought they had studs ??