ok i have a question what all determins how much boost you can run on a motor i have a 347 stroker all forged with a 9:1 compression ratio and im putting a single t-68 turbonetics turbo on it with intercooler how do i find out how much safe boost i can run? thanks

 

theres no equation. sometimes (as with the stock 4.6) you can determine a safe "limit" but thats only determined by those who have broken parts consistantly enough to study these breakages and come to a point where you realize these failures occur. since you are using a turbo, its easy for you. get your car on a dyno and adjust the wastegate for a low boost level. run it more and more until the environment seems to become unsafe or your satifsied with the results. your setup leaves open areas. which heads?cams?intake? these all play effect on your boost level. you should be more concerned about how much rwhp your motor can put out before becoming unsafe. the 347 is a big stroke, so be careful. is this a street car?

 

yes this is a street car i have a fully ported cobra intake upper and lower a 75mm inlet on the upper a 75 mm throttle body gt40p heads with a 3 way valve job and a e303 cam i also have a main support for added strength but how power do you personaly think my motor can hold just as a guess??? thanks a lot

 

all that motor with gt40 heads and a ecam....? i dont know much about these motors. i seen a 1000hp 347 once.

 

yeah i know im thinking of going with ported victor jr heads and a x cam i think that may work much better thanks for your help