KILLER-LS1

iTrader: (18)

hey i just finished building a 404ci iron block with ARP main & head studs, eagle forged crank & rods, ARP rod bolts, Mahle forged pistons, 9.5:1 comp ratio, Edelbrock pro-port heads CNC'd by West Coast Racing Cylinder Head with a 74cc chaimber. stock 6.0 MLS headgaskets, Patriot dual valvesprings w/ shims on the intake valves. just curious what type of max boost i could run safely (this would only be for dynoshootouts/occasional track use)

this is just a street car btw

stevieturbo

How long is a piece of string ?


Far too many variables to give an answer. The only way to establish this, is on a dyno whilst tuning your setup.

cjmatt

iTrader: (4)

just based on your components and compression, id try to keep at at 19-20 max. prob best off to tune it at 15 and see how much you make

TurboAv

iTrader: (6)

15psi with a crappy tune could be to much. 20 psi with a good tune might hold. Every engine is different. While there are some generalities, it comes down to how your engine is built and the tune. The more efficient you can make your engine with regards to getting air into it and out of it, the less boost you have to run for a given RWHP. With my build I am hoping to get the 750-800rwhp I'm looking for for with less than 18psi. If I can't meet that goal I will need to buy new heads, as mine are GM 243's, to get the thicker deck.

KILLER-LS1

iTrader: (18)

Well yes, I understand about the tune and quality of the build. But let's assume it has a great tune and tho motor was built perfectly... I'm really wondering what the components can hold themselves, ie pistons rods headgasket etc.

Oh and btw I'm actually running the new LS9 head gasket

stevieturbo

If everything was perfect....then none of the items you mentioned are of concern. Boost is also irrelevant.

What sort of forced induction system will you use, and how much power are you hoping to achieve, what fuel ? etc etc etc...


So once again, there is no answer to yuor question, as there are nowhere near enough details in your question

blacksi

iTrader: (3)

8# is safe, until you get bored with that then 10# til you get bored with that, then 12# til ah you get it. Each time the tune will determine if your fuel is up to par and what RWHP you are making. Call eagle and ask what your rods are rated for.

jomomma

iTrader: (39)

what size turbo are you running?

Snyper

iTrader: (27)

Yeah the turbo (if thats what your running) will also be a huge deciding factor. 20#s on a T76 is MUCH different than 20#s on say a 101mm.

KILLER-LS1

iTrader: (18)

its a 76mm, im curious if i can hit the 1,000rwhp mark on the dyno just for fun. id never drive it that way. im assumin that would take 22ish psi?

355TurboLT1

iTrader: (11)

I dont think there is any way you will see 1000rwhp with a 76 on that motor. Forced inductions did a test on the 76 vs the PT-88. The T-76 did not break 1000rwhp as I recall and that was at 24psi.

Snyper

iTrader: (27)

yeah not gonna happen..youll see around 800 at that amount.

venom ws7

iTrader: (13)

76mm is way to small for 400+ci I want to run bigger than that in my 347ci.

Is the car M6 or auto?? If its a stalled auto then go 91mm and if M6 i'd go with 88 to spool it a little faster..

About the boost depends on the tune and fule used