if u have ur motor out o ring the block cant go wrong with it not going to make it worse it will make it better for you!

 

35 and above psi

 

is this relative? cylinder pressures are relative to power output and not turbo pressure isn't it?

 

I kid you not. I'm also getting the L19's and a new head gasket when I start pushing ~40PSI or more. I may not need these things but I'll be the one laughing when your blow your motor (I won't really be laughing, just a figure of speech). I figured it to be cheap insurance to o-ring the block too.

 

True, cylinder pressure and boost pressure are not related.

Cylinder pressure is regulated by a wastegate.

 

is that a joke? i dont understand american sense of humour

 

lol!!!!!!!!

 

If this is wrong, I'm never going to Wikipedia for answers again lol.

 

that sentence went from A to D without talking about B and C. fail

looks like information on wikipedia is about as reliable as information found on forums... oh wait

 

I'd say it depends on who is building your motor and who is tuning it.

Its a nice safety net in case you find yourself with some unforeseen knock at high HP. Buschur also uses regular ARP's on his O-ringed heads IIRC.

 

i think i may just o ring the head or go no rings at all. the machine work on the block is finished so if anything i may do the head. im using L19's for sure tho

 

I O-ringed my head at the last minute, just to be safe. If I had to do it again, I'd O-ring the block instead. Having to resurface the head after it's been O-ringed may be a problem in the future, who knows.

 

O-ringed my block never had the head off the car my car has seen as much as 48psi more than 1 time

 

All you guys are taking what JohnBradley said as a reason not to get your block o-ringed. But what you didn't hear was JB said they only _recently_ figured out ways to deck and surface the head and block so they don't need to. So unless you are getting your block and head prepared by ER, I wouldn't consider his advice as saying you don't need o-rings.

 

I would not do O-rings. My engine is not, good good surface finish, factory HG, and good studs.

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