Wastegate size?’s

Reply Subscribe

Thread Tools

Search this Thread

Nov 23, 2018 | 01:09 PM

Drj8787

Thread Starter

TECH Apprentice

Joined: May 2010

Posts: 361

Likes: 0

Wastegate size?’s

Is it better to use two smaller wastegates one each bank or just one larger one on one bank?

Nov 23, 2018 | 05:17 PM

jordoza

TECH Enthusiast

Joined: Dec 2017

Posts: 676

Likes: 72

If you use one large on you will need it to feed from both banks. Some have done it with it on only one bank but it isnt the right way to do it.

Nov 23, 2018 | 09:06 PM

truckdoug

9 Second Club

iTrader: (26)

Joined: Nov 2013

Posts: 6,389

Likes: 558

From: Portlandia

unless you are keeping the banks divided right to the turbine inlet, a single with priority flow best for simplicity sake

personally i prefer to put my gates right on the turbine housing

Nov 24, 2018 | 08:58 AM

01ssreda4

TECH Senior Member

iTrader: (96)

Joined: Aug 2007

Posts: 24,241

Likes: 89

From: Turnin' Wrenches Infractions: 005

I just tuned one, with a single 44, that made 12 psi on as 7 pound spring. Gate is not directly in the exhaust flow path due to the design of the hotside. Since mine is divided, and I had a 44mm already, I just added a second one, one to each side, and tried to get them more in line with the exhaust flow. I think it's gonna work well.

Nov 24, 2018 | 09:10 AM

Drj8787

Thread Starter

TECH Apprentice

Joined: May 2010

Posts: 361

Likes: 0

Quote:

Originally Posted by truckdoug

unless you are keeping the banks divided right to the turbine inlet, a single with priority flow best for simplicity sake

personally i prefer to put my gates right on the turbine housing

well the reason I ask is I feel it will be difficult to give a single one priority and have it vent both banks.

Nov 24, 2018 | 10:30 AM

fif_gen_powa

Staging Lane

Joined: Mar 2015

Posts: 79

Likes: 2

Two wastegates, one on each bank, is the easiest and safest way to go. If the merge and location is not right on the big single it will creep up top (depending on turbo size)

Nov 24, 2018 | 11:48 AM

Drj8787

Thread Starter

TECH Apprentice

Joined: May 2010

Posts: 361

Likes: 0

Quote:

Originally Posted by fif_gen_powa

Two wastegates, one on each bank, is the easiest and safest way to go. If the merge and location is not right on the big single it will creep up top (depending on turbo size)

on3 7875. I'm going to put it where the battery is/was haven't got started yet just ordering all my parts as of now.

Trending Topics

Oil Bypass Barbell

10

215
406 Hydraulic to Solid Roller cam results

14

441
Replacing My LS3 with an LSA Did I make the right choice?

6

249
Many Camaros Chevys GM at Veteran's Car Show today

6

175
4L80e loosing line pressure

36

1.1k

Nov 25, 2018 | 10:04 AM

fif_gen_powa

Staging Lane

Joined: Mar 2015

Posts: 79

Likes: 2

Quote:

Originally Posted by Drj8787

on3 7875. I'm going to put it where the battery is/was haven't got started yet just ordering all my parts as of now.

I had a comp 78/75 with a single 45mm Wastegate (with a not so great merge design) and it worked fine. Switched to a pt88 and it had bad boost creep on a 10psi spring would hit 18-9psi up top. This was on a ls3 motor huronspeed gen5 Camaro single turbo kit, had to add a second Wastegate to get it under control.