dual wastegate spring size question
07-25-2009, 10:17 AM
#1
dual wastegate spring size question
I had a questions on what spring is recommended for a dual 44mm wastegate setup. The turbo i am using is the twinscroll s372 with the hondata s300 boost controller. tried searching but couldnt find anything. Any help is appreciated thanks in advance.
Last edited by jdm inc; 07-25-2009 at 11:45 AM.
07-25-2009, 03:30 PM
#6
Honda-Tech Member
Join Date: Mar 2006
Location: Newark, DE
Posts: 6,381
Likes: 0
Received 0 Likes
on
0 Posts
07-25-2009, 03:32 PM
#7
Honda-Tech Member
Join Date: Sep 2007
Location: PA
Posts: 800
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
what ever spring you choose make sure you switch to a JS boost controller for perfect boost control 
and yes s300 can control the dual stage versions if you dont want to use a switch.
and yes s300 can control the dual stage versions if you dont want to use a switch.
Trending Topics
07-26-2009, 12:29 PM
#10
Honda-Tech Member
Join Date: Mar 2006
Location: Newark, DE
Posts: 6,381
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
You definately wont even get close to that with 6psi springs w/o Co2, I would think 1 bar springs should get you close......
07-26-2009, 07:15 PM
#14
Honda-Tech Member
Join Date: Sep 2003
Location: MD
Posts: 2,322
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
OP, I'd suggest anything from 10-13 psi depending on what kind of boost you want to run in first gear.
07-26-2009, 07:30 PM
#15
Honda-Tech Member
Join Date: Mar 2007
Location: dayton, oh, usa
Posts: 433
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
i dont know if you can still find it or not but i had the same question with same gates and same target boost and there was a really informative thread that came out of it with pictures and diagrams explaining how i got my results but i ended up getting over 25 psi from one 3 psi spring in each gate with more testing still to come i think i can go higher and i was able to turn it down to around 5 psi . i was told and argued with that you couldnt get more boost than double what your spring was rated at. i proved this wrong by a lot, its all about how you route the lines and maybe adding a second solenoid. i was pushed hard to buy a co2 kit but i still dont think ill need it to get to 35psi. search around in this forum for the thread i dont remember the name but it was around last fall. unfortunately the thread ended with me having a hurt engine that i have yet to tear down but the info is there!
edit: here i found it for you https://honda-tech.com/forums/forced-induction-16/dual-tial-44mm-wgs-not-opening-help-2426232/ the first page or two is arguing about wg placement which i also proved my case on but theres still good info that could help you out. hope it helps and maybe you can continue the testing!
edit: here i found it for you https://honda-tech.com/forums/forced-induction-16/dual-tial-44mm-wgs-not-opening-help-2426232/ the first page or two is arguing about wg placement which i also proved my case on but theres still good info that could help you out. hope it helps and maybe you can continue the testing!
Last edited by got wide; 07-26-2009 at 07:44 PM.
07-27-2009, 06:49 AM
#18
Honda-Tech Member
Join Date: Jan 2006
Location: Shifting through socal with 3 toes
Posts: 2,221
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
I have 1bar springs in my sestup and im running the same turbo, this was recommended to me by a well known person on here also!
07-27-2009, 07:55 AM
#19
Honda-Tech Member
Join Date: Dec 2002
Location: Milton, Ontario, Canada
Posts: 810
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
07-27-2009, 01:25 PM
#21
Honda-Tech Member
Join Date: Mar 2006
Location: Newark, DE
Posts: 6,381
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
We have FWD cars with huge amounts of power, there is no laying down the power in 1st gear....... I didnt even make 14psi in 1st or 2nd gear I spun so hard on slicks there was no load to build the boost.
With that being said I have 10psi springs in my new Tial 38mm MVS's but I am running AEM and its supposed to have a much better PWM driver that can make 3x to 4x spring pressure according to my tuner.
With that being said I have 10psi springs in my new Tial 38mm MVS's but I am running AEM and its supposed to have a much better PWM driver that can make 3x to 4x spring pressure according to my tuner.
07-28-2009, 12:46 PM
#23
Honda-Tech Member
Join Date: Mar 2006
Location: Newark, DE
Posts: 6,381
Likes: 0
Received 0 Likes
on
0 Posts
Re: dual wastegate spring size question
I dont know, I think the solenoid frequency is the Smanager software is non-adjustable, which will probably affect the total amount of boost you can make.
Typically you can make 2x spring pressure, sometimes more.
Typically you can make 2x spring pressure, sometimes more.
