Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > Vendor Row > Sponsor Forums > JGS Turbo
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Closed Thread
 
Thread Tools
Old 03-09-2014, 09:43 PM   #1
91shelbydaytona
 
91shelbydaytona's Avatar

Name: 91shelbydaytona
Title: Too Much Time
Status: Not Here
Join Date: Nov 2008
Location: Viroqua, WI
Member`s Gallery
Posts: 317
What size wastegate?

On my 12v with a 62/68 over s475 or possibly s478, Which size gate do you recommend for feeding the primary? Should I be looking at the 40mm or 50mm?
__________________
Chris

94 1500 RCSB 12v, Joker Fabrication, Farrell Diesel Service, Hamilton Cams, Airdog
 
Old 03-10-2014, 10:27 PM   #2
Extended Power
 
Extended Power's Avatar

Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
Member`s Gallery
Posts: 2,976
This is only my opinion...but if I had to do mine over, I would rather error on the bigger side of gates. That leaves room to grow, if you ever add more fuel and air.
Going too small is just useless...

You can open the bigger gate "less" than 100%...but you can't open the smaller gate "more" than 100%.

....see what Lance has to say.
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph


If It Ain't Broke...Fix It Until It Is!!!
 
Old 03-11-2014, 08:34 AM   #3
Backhoe man
 
Backhoe man's Avatar

Name: Backhoe man
Title: nobody
Status: Not Here
Join Date: Apr 2008
Member`s Gallery
Posts: 472
I just talked to Lance about this, he said 40 is easier to control. I have a 50 and can not seem to make it happy.
 
Old 03-11-2014, 09:13 AM   #4
jgsturbo

Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
Member`s Gallery
Posts: 483
I think on fuel only, the 40mm will control that secondary very well.
I'd only recommend the 50 if you had plans for big nitrous.
We need to size the gate for charger its controlling (with respect to desired PR). And our 40mm easily handles a 68mm turbine.
__________________
Lance Humbert
JGS Precision Turbo Control Products
 
Old 03-11-2014, 09:16 AM   #5
jgsturbo

Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
Member`s Gallery
Posts: 483
Quote:
Originally Posted by Backhoe man View Post
I just talked to Lance about this, he said 40 is easier to control. I have a 50 and can not seem to make it happy.
In a compound / wg reroute setup or a Single or WG dump setup?
Big difference in pr across the gate.
__________________
Lance Humbert
JGS Precision Turbo Control Products
 
Old 03-11-2014, 09:36 AM   #6
91shelbydaytona
 
91shelbydaytona's Avatar

Name: 91shelbydaytona
Title: Too Much Time
Status: Not Here
Join Date: Nov 2008
Location: Viroqua, WI
Member`s Gallery
Posts: 317
I do have a nitrous kit, but if i ever decided to install it i would rather install a second gate to have total control over boost.
__________________
Chris

94 1500 RCSB 12v, Joker Fabrication, Farrell Diesel Service, Hamilton Cams, Airdog
 
Old 03-11-2014, 02:45 PM   #7
Backhoe man
 
Backhoe man's Avatar

Name: Backhoe man
Title: nobody
Status: Not Here
Join Date: Apr 2008
Member`s Gallery
Posts: 472
Quote:
Originally Posted by jgsturbo View Post
In a compound / wg reroute setup or a Single or WG dump setup?

Big difference in pr across the gate.

It's a single gated into the exhaust system, s400 charger with a 74/83 turbine
 
Old 03-11-2014, 06:05 PM   #8
Extended Power
 
Extended Power's Avatar

Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
Member`s Gallery
Posts: 2,976
Sorry to high jack here...

Lance, my secondary is a 68mm, and my primary is a the S480/96/1.32

I had one 38mm JGS gate, but no matter what, drive pressure remained at over 100 psi.

Just picked up a second 38mm gate, so I can run one on each bank.

Was this a good idea, or should of I went with a single 50mm?
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph


If It Ain't Broke...Fix It Until It Is!!!
 
Old 03-11-2014, 08:35 PM   #9
jgsturbo

Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
Member`s Gallery
Posts: 483
If the waste gate isn't getting good direct flow from both banks you will get poor gate performance.
We see this in turbo gas V8s all the time, installation on a inline motor is more straight forward and predictable.

BTW- We don't build a 38mm wastegate, never have.
__________________
Lance Humbert
JGS Precision Turbo Control Products
 
Old 03-11-2014, 08:44 PM   #10
jgsturbo

Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
Member`s Gallery
Posts: 483
Quote:
Originally Posted by Backhoe man View Post
It's a single gated into the exhaust system, s400 charger with a 74/83 turbine
Single setups like this do have problems using a 50mm correctly, the large pressure drop across the gate makes a 50mm gate flow a metric ton more than if it was breathing back into a 20-40psi hot pipe.
__________________
Lance Humbert
JGS Precision Turbo Control Products
 
Old 03-11-2014, 08:54 PM   #11
Extended Power
 
Extended Power's Avatar

Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
Member`s Gallery
Posts: 2,976
Quote:
Originally Posted by jgsturbo View Post

BTW- We don't build a 38mm wastegate, never have.
Well, then they are 40mm.

Here's the one I used last summer....needs some new o-rings.

Click the image to open in full size.


And the one I picked up today from Colin.

Click the image to open in full size.


I'm not trying to start anything...I love the JGS wastegates and BOVs.
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph


If It Ain't Broke...Fix It Until It Is!!!

Last edited by Extended Power; 03-11-2014 at 08:56 PM.
 
Old 03-11-2014, 09:42 PM   #12
jgsturbo

Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
Member`s Gallery
Posts: 483
Dirty! Its all good, just a reminder
The second one is a much older diaphragm model so be careful with it.

The V-band 40mm does seem to flow better than the old 2 bolt model.
__________________
Lance Humbert
JGS Precision Turbo Control Products
 
Old 03-11-2014, 10:07 PM   #13
Extended Power
 
Extended Power's Avatar

Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
Member`s Gallery
Posts: 2,976
Oh crap...I thought it had o-rings like the one I already had.
Damn...

Are they still serviceable? (The old diaphragm style?)
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph


If It Ain't Broke...Fix It Until It Is!!!
 
Old 03-11-2014, 11:04 PM   #14
jgsturbo

Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
Member`s Gallery
Posts: 483
We ditched the diaphragm quite a few years ago. They were expensive and people wanted to use pressure to close the gate.
We had to buy $8K of them at a time as well.

We do offer an upgrade service to install piston hardware for $100.
__________________
Lance Humbert
JGS Precision Turbo Control Products
 
Old 03-12-2014, 12:27 PM   #15
Extended Power
 
Extended Power's Avatar

Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
Member`s Gallery
Posts: 2,976
Quote:
Originally Posted by jgsturbo View Post
We ditched the diaphragm quite a few years ago. They were expensive and people wanted to use pressure to close the gate.
We had to buy $8K of them at a time as well.

We do offer an upgrade service to install piston hardware for $100.
Augh...

Can you PM me a price for 2 new 40mm gates that have the Vband connections please?

To all: I am selling both of my 40mm JGS gates that are flange mount.
The one I own will have new O-rings installed.
The one I bought from Collin will come just the way he posted it in the for sale section.
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph


If It Ain't Broke...Fix It Until It Is!!!
 
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:23 AM.

 


Powered by vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2018, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com