Quote:
Originally Posted by Sleepless
Well, you made a very hyperbolic statement (as is the one above about the power level) with a title about "facts". So, just keeping the "facts" straight...
Tuned properly, 10PSI or more is perfectly "safe" for a lot of people; even those of us that track the car heavily.
Let's keep the hyperbole down a bit and truly stick to facts  |
I would like to expand on this a little, assuming your S/C is putting out close to a factory Subaru wrx turbo.
A Wrx with factory boost limit
Boost and Altitude Correction to Compression
You are running 15.9 PSI of boost at an altitude of 500 feet. Your motor's static compression is 10.6 :1. At this boost level and altitude your effective compression ratio is 21.97 :1, and without altitude correction your compression ratio would be 22.07 :1.
A BRZ with factory bottom end and 10 psi
Boost and Altitude Correction to Compression
You are running 10 PSI of boost at an altitude of 500 feet. Your motor's static compression is 12.5 :1. At this boost level and altitude your effective compression ratio is 20.90 :1, and without altitude correction your compression ratio would be 21.00 :1.
You are actually less building less effective compression then a stock Wrx.
So if your tune is close to a factory spec tune for a wrx I see no reason to say its not safe in a street environment.
Two things to add, one part numbers are different on a brz to a wrx for the connecting rod, so I can not compare them as I don't have a factory wrx rod.
Two the wrx is still breaking rods in factory trim not a lot but some. So tracking or a hotter than stock tune to reach your 300hp I would not call it bullet proof.