4 bolt vs 5 bolt (ford style) discharge housing
#16
Evolved Member
iTrader: (83)
Originally Posted by 03whitegsr
Oh, one last thing, wastegate placement. Putting the wastegate in the scroll area of the turbo like the 5-bolt hosung is a good way to create boost creep issues often times. Wastegates belong in the collector of the manifold before entering the nozzle area of the turbocharger, IMO.
Most of the vendors I've spoken with simply don't offer a 4 bolt housing due to A/C interference. The SS tubular manifold mounted wastegate and a V-band exhaust is the way to go.
#17
Account Disabled
iTrader: (6)
Join Date: Aug 2005
Location: PeakBoost.net
Posts: 266
Likes: 0
Received 0 Likes
on
0 Posts
we've tested the 4bolt T31 housing vs. the ford 5bolt housing in a ~400whp nissan application.
same turbo(GT2871R), same boost, no changes...
baselining with the 5bolt housing and the T31 4bolt gained 20whp.
and just to toss it in there, we only use the T31 4bolt housing in all of our turbosystems. including our HVS topmount kit with a 3" 4bolt to vband adapter for the downpipe connection.
hope this helps
same turbo(GT2871R), same boost, no changes...
baselining with the 5bolt housing and the T31 4bolt gained 20whp.
and just to toss it in there, we only use the T31 4bolt housing in all of our turbosystems. including our HVS topmount kit with a 3" 4bolt to vband adapter for the downpipe connection.
hope this helps
Thread
Thread Starter
Forum
Replies
Last Post
OakosAutomotive
EvoX 'For Sale' Miscellaneous
175
Nov 29, 2019 07:50 AM
Creamo3
Evo Engine / Turbo / Drivetrain
12
Apr 3, 2009 04:31 PM