SleepinGVR4
Well-known member
What size the wastegate flapper on a E316G? And why doesn't FP offer the 34mm as an upgrade? Just wondering.
The Top Mitsubishi Galant VR-4 Resource
Join the best E39A 1991-1992 Mitsubishi Galant VR-4 community and document your GVR4 journey.
- Software Upgraded - Reset Your Password to Login
In order to log in after the forum software change, you need to reset your password. If you don't have access to the email address you used to register your GVR4.org account, you won't be able to reset your password. In that case, follow the instructions here to regain access to the forum.
Wastegate flapper question?
- Thread starterSleepinGVR4
- Start date
boostedinaz
Well-known member
From what I have read most people who use to get the larger flapper were using that to get rid of boost creep when running large exhaust. Back then 20 psi was considered a lot and so trying to keep the tubro below that was hard without good porting and a large flapper.
Today most people are running a lot more boost on that turbo, say 25+, so creep usually isn't an issue but the larger flapper area is. With more area the pressure required to keep the flapper closed is much greater so running the smaller flapper is better for high boost situations.
My .02
Today most people are running a lot more boost on that turbo, say 25+, so creep usually isn't an issue but the larger flapper area is. With more area the pressure required to keep the flapper closed is much greater so running the smaller flapper is better for high boost situations.
My .02
SleepinGVR4
Well-known member
Makes sense, thanks.
RedTwo
Well-known member
The Evo III exhaust housing already has a 34mm wastegate flapper
Evo III 070 on left, standard 060 on the right.
Evo III 070 on left, standard 060 on the right.
Last edited:
