rb20 build trouble (gaskets)

[camo240]

i know there is prob a thread somewhere on here that will have what i want but i spent last two hours searching here and google and no one ever gives straight answers or has a diffrent setup or question.... i have stock pistons, plus one intake valvesa diffrent turbo planning on running 18lbs some day after i get injectors and tune. but untill then 12-14. i need to know how thick my head gasket should be if my head was decked 6 thousandths (.006)? i dont wanna run stock if it will raise compression to much and not allow me to run 18lbs of boost in future. i need something that will be SAFE!!! i would rather be safe then push more power and blow it up if thats the case. plz help im held up on having my car back bc of this lol any info will help thank you

[camo240]

i will be on tomorrow i hope someone can help me out with this thank you for taking the time and giving your advice/suggestion.

[Sileighty_85]

just get a 1.2 or 1.5 mil,

When i had my Head milled I ran a stock H/G atill no issues.

Tunning is gonna be your key when dealing with your engines life

[fliprayzin240sx]

Shit, im gonna be running stock HG and ARP studs. I've seen folks push over 400hp on fresh stock HG on RB20s.

[trickey1991]

I'm making 355whp on 20lbs on 94 octane . on my 20. Motors never been cracked and Its been tuned since May 21. Compression is still 160 all across board.

I'm running 25lbs in the spring hoping to make around 400whp.

just shows you don't need head studs and head gaskets to make the reliable power.

a buddy of mine has an uncracked engine that made 432whp for 5 years beaten daily and drifted competitively weekend after weekend.

[camo240]

So being shaved .006 won't matter to much if I ran stock gasket? I know alot of people say its safe for a good amount of bourse power but like someone above said its on a un opened motor compared to mine where the head was shaved down. And trickey what do u have done to ur car for that horse power? And was that a estimate or dyno confirmed hp of 355? Thanks

[camo240]

And also I have arp head studs I'm gonna use. And plus one intake valves will they have clearence problems with head being shaved and using stock head gasket

[camo240]

Bump is any one out there? Lol plz help me out if you cAn thanks.

[camo240]

still stuck in a shitty spot. anyone have any more info about running stock gasket with shaved head and overside valves? just +1s. and head was decked .006 any help is appreciated i need this thing back together

[Sileighty_85]

just run a 1.2

TOMEI - RB 20/25/26 Headgasket - Enjuku Racing Parts, LLC (http://www.enjukuracing.com/products/TOMEI-%252d-RB-20%7B47%7D25%7B47%7D26-Headgasket.html)

[budderigs]

Stock head gasket will be fine. tune is the key. I don't know how much power im making bit im running 25#s with stock head gasket and bolts. Im running e85. Street tuned at 11.4 afr with a modified vg30 turbo.been fine for the last 6 months racing it every weekend.

[camo240]

what kind of tune do u have? i wanna run like 18-22 lbs. and reason i was worried is bc being shaved raises my compresion ratio and in turn limits my boost potential

[budderigs]

what kind of tune do u have? i wanna run like 18-22 lbs. and reason i was worried is bc being shaved raises my compresion ratio and in turn limits my boost potential

.006 is very little. I would have to play with several insturments for at least an hour before I could detect that change. it at most with raise your compression by .1 - I dont remember the specs off the top of my head but I think the 25 has a ratio of 9-1 so now you have a ratio of 9.1-1 its not like your going to 10.5-1. you will be safe on 91 oct gas at 14psi. pull 2 degrees of timing to be on the safe side.

that is on gas. e85 is another story. on e85 as long as you have the fuel you can run pretty close to anylvl of boost. and limit det. to a min. e-85 cools the exhuast temps so well you can even over boost smaller turbos without burnning up the turbine wheels. or another respect. it has a high oxigen amount so it will spool large turbos quicker reducing lag.

I am tuning with a combination of proper maf sizing and a safc to fine tune to my in car lc1 wideband.

safc's are kinda tricky to tune with so keep in mind they wont fix every tune. and once your maf perameters are out of bounds you will lose or gain timing. I would not recomend using one if your a novice at tuning. they seem easy to use, they are really not. they are just cheap.