Thanks.

 

"Boost" isn't the same between superchargers or turbochargers. Or even between different spec turbos for that matter. That said the F20C has proven to be pretty stout. I wouldn't be suprsed to see a relaible 400+WHP on stock internals and pump gas. You'll be "safe" at whatever boost level you tune [well] for.

 

I will be running around 10 or so on my S when it is done. Turbo GT35R. Stock compression conservative map.

 

We've run 13 psi on a stock bottom end with 10.4:1 compression on 91 octane. This is a Vortech supercharged car, which means that midrange boost is less (and that's where detonation tends to be most likely). With compression in the 9.5:1 range up to 15 psi on 91 octane is feasible as long as the turbo is in its efficiency range and you have a good intercooler and tuning.

UL

 

tuning is going to be key. inline put down 530whp on the stock bottom end with lowered compression via headgasket.

Kyle R

 

yes but how long will the stock block hold up?

 

Well, I'm sure he's not running high boost and race gas all the time. He probably has boost turned down for daily driving...

 

Slightly less than 10:1 compression ratio and a good tune with an AEM EMS or MoTeC, 12 - 13 psi on 93 octane would be on the conservative side. 15 psi with water injection.

 

i have aquamist i agree with fperra, methenal injection ( is what i use) is super safe and i have run up to 18lbs now i have turned it down a bit im @1.2 bar not everyday though via headgasket and aquamist