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-   -   help w headgasket selection. (http://www.toyota-supra.info/forums/mkiii-supra/7226-help-w-headgasket-selection.html)

marc 01-25-2007 11:19 PM

well im keeping my engine in my car, and never plan on running more than 25lbs thru it. so botls or studs? im buyin them today.

marc 01-26-2007 02:19 AM

im just ganna go bolts

SupraDupra 01-26-2007 12:51 PM

I may need some education here ,I don't know a ton about turbos but 25 lbs boost sounds pretty intense.By my calculations that would put you at a little over 14:1 compression ratio under full boost.Although according to wikipedia that's an ideal ratio ,wouldn't you need to run race fuel for that?

IHateHacks 01-26-2007 04:29 PM

First of all if you are running anywhere close to 20psi you will need more than head studs, a metal head gasket and race gas. You will need rods, ARP rod bolts, pistons, lexus maf, 550's, walbro pump, and something to tune it, at least a S-AFC. But to do it properly "I" would strip the block, send it to a shop, do it right.

Use bolts only if you are going to keep it fairly stock, like no more than 10psi. If you are using a metal head gasket then don't skimp out, use head studs.

marc 01-26-2007 05:29 PM

lol ok realasticly maybe 18 lol. i wwouldnt run that much with this car. a future one def tho.

marc 01-26-2007 05:30 PM

and that wont be any time soon.

marc 01-26-2007 05:31 PM

k studs it is.

IHateHacks 01-26-2007 05:46 PM

Just remember what I said in the last post on the first page of this thread.

"Studs are much more difficult to install with the engine in the car, but are stronger and less prone to stretching. Head Bolts will be easier to install with the engine in the car, but are not reccomended for high-boost applications."

It's a 2 way street. Studs are very hard to install with the block in the car but will hold up to alot of abuse. Bolts are VERY easy to install but are not meant for high boost.

Thats why I just used bolts, very easy.

It's not like that for all cars. Like transverse mounted engines such as an EVO, studs are no harder to install than bolts because the head doesn't have to clear the firewall.

marc 01-26-2007 05:58 PM

y are studs so much harder?

marc 01-26-2007 06:18 PM

hacks how old r u? im 17 and im ganna be doin this pretty much all myself, i have ebnough knowledge of cars to be confortable doing it. i wonder if this is a record or sumthing lol.


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