MAP Turbochargers / 722whp Stock Frame Twin Scroll
#97
Evolved Member
iTrader: (42)
Join Date: Aug 2005
Location: St. Charles, IL
Posts: 2,502
Likes: 0
Received 0 Likes
on
0 Posts
I wouldn't say its creeping as it hits ~40psi right about where you'd expect it. Creep is usually meant to describe boost that is increasing past peak boost. If you saw it continuing to increase to 6-6.5k I'd say you could call that creep. It however looks like it is able to create a decent amount of boost before that, unlike your single scroll black When running boost that high not all turbo's will have a very slopey boost curve; some jet up to a certain level then take a bit to keep moving past that point, which might be the case in this test. It could also have something to do with the boost control method as you mentioned, w/g or bc.
#105
Former Sponsor
iTrader: (38)
I will see if I can get my associate Bob in here to field the above question as he will be better suited than I, but basically running any turbocharger at its limits will have an adverse affect on longevity and we have to consider how we will be structuring our warranty program. Some of our competitors discourage the use of external wastegates simply due to the fact that exhaust pressure will eventually force open an internal wastegate effectively creating a maximum boost pressure and limiting shaft speeds. There are a lot of considerations to be made in regards to the launch of this program