FP T25/28 17 psi actuator

Did a couple quick searches but didn't turn up anything. Just curious about this. http://linux.forcedperformance.net/merchant2/merchant.mv?Screen=PROD&Store_Code=FP&Product_Code=WAT28DSM17psi

Couple questions: Why would this be any different than using a mbc at 17 psi? Why does it show a pretty large hp increase over an mbc at 17 psi? And isn't 17 psi a little high for the T-too small? At twice as much as a mbc, and less adjustability, I don't see why they are selling this. :confused:

"Run 013 was the stock actuator with the boost turned up to spike to 17psi and drop to around 12psi. Run 023 is the New 17psi actuator running a steady 17ps"

12psi vs 17psi, it's an unfair comparison

They're probably selling it for people who want a stock appearing engine bay,(the people running T28's)

To just about everyone, they see a stock turbo running stock boost, no mbc.

Thanks crunchy, that makes more sense.

no problem

The reason to upgrade the actuator is to keep the flapper from blowing open prematurely. The t25/28 has a very resitrictive turbine housing, raising pressure on the manifold side of the flapper, which then pushes it open (force = pressure x area). Another reason is to allow EBCs to run more boost (most do double WG spring pressure), but this is unlikely to be a reason to do this on such small turbos. Also, running more than double spring pressure with an MBC can lead to very unstable boost.

I installed a Forge 17 psi actuator on my EVO8 turbo. No change in the max boost I could run, but it was worth the 150 bucks to rule out a flapper blowing open problem. The EVO8 turbo seems to be designed very well since it doesn't blow the flapper open at up to 28 psi.

Ah, I see. Thanks Kevin. :)