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07-22-2013, 09:52 AM
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#1
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Name: RonA
Title: Too Much Time
Status: Not Here
Join Date: Feb 2008
Location: Liberal ground zero.
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Posts: 11,058
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50mm gate spring question.
Good morning Lance.
What would be your best guess on the change in opening pressure between running the 50mm gate with the stiffest large spring, and running the stiffest large spring with the added smaller spring that fits in the middle. Also, what grease do you recommend on the piston O-rings when I put it back together?
Thanks.
Ron Allen
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55 years of work and all I got was a T-shirt.
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07-22-2013, 10:14 AM
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#2
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Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
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We use high temp silicone O-ring lube from mcmaster.com, that's the best I found. A little silicone grease they sell for caliper slides seems okay too.
Just apply the thinnest skim of lube.
What a spring is worth depends on which gate your installing it.
The large top 500R the springs are worthless in terms of actuator pressure.
I had this all worked out some where, IIRC the preload of the small heavy should be worth 10-12psi of top pressure. The large heavy is similar if not a little lighter.
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Lance Humbert
JGS Precision Turbo Control Products
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07-22-2013, 10:31 AM
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#3
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Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
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Posts: 483
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And when I say actuator pressure I mean pressure applied in the top wastegate port.
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Lance Humbert
JGS Precision Turbo Control Products
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07-22-2013, 10:45 AM
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#4
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Name: RonA
Title: Too Much Time
Status: Not Here
Join Date: Feb 2008
Location: Liberal ground zero.
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Posts: 11,058
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This is what I have.
2.33 piston
.162dia. large spring
.125 inner spring.
__________________
55 years of work and all I got was a T-shirt.
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07-22-2013, 11:33 AM
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#5
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Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
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Posts: 483
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I knew I had a 50/50 chance... In that case-
Changes it to +12-15psi by adding smaller spring.
Again this is a rough guesstimate of what the spring pre-load is worth in top port air pressure.
__________________
Lance Humbert
JGS Precision Turbo Control Products
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07-22-2013, 11:43 AM
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#6
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Name: RonA
Title: Too Much Time
Status: Not Here
Join Date: Feb 2008
Location: Liberal ground zero.
Member`s Gallery
Posts: 11,058
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Quote:
Originally Posted by jgsturbo
I knew I had a 50/50 chance... In that case-
Changes it to +12-15psi by adding smaller spring.
Again this is a rough guesstimate of what the spring pre-load is worth in top port air pressure.
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That's about what I'm looking for. Thanks Lance.
RonA
__________________
55 years of work and all I got was a T-shirt.
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07-22-2013, 11:47 AM
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#7
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Name: diesel_importer
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Fairfield,TX
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Posts: 4,501
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When applying psi to top port only, should I plug or leave open bottom port?
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01 QCSB 2WD AUTO: Redline/Smarty, Monster VP, 6x.013, S467 FMW, Goerend Trans, Caltracs.
Fuel only - 11.85 @ 114, 50 Shot - 11.58 @ 116 w/ 1.69 60'
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07-25-2013, 04:33 PM
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#8
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Name: diesel_importer
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Fairfield,TX
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Posts: 4,501
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Bump. Anybody?
__________________
01 QCSB 2WD AUTO: Redline/Smarty, Monster VP, 6x.013, S467 FMW, Goerend Trans, Caltracs.
Fuel only - 11.85 @ 114, 50 Shot - 11.58 @ 116 w/ 1.69 60'
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07-25-2013, 04:42 PM
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#9
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Name: TheNatural31
Title: Missing pieces.....
Status: Not Here
Join Date: Aug 2008
Location: Texas
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Posts: 848
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Quote:
Originally Posted by diesel_importer
Bump. Anybody?
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Let it vent to atmosphere.
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07-25-2013, 05:35 PM
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#10
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Name: diesel_importer
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Fairfield,TX
Member`s Gallery
Posts: 4,501
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That's what I thought. Thanks.
__________________
01 QCSB 2WD AUTO: Redline/Smarty, Monster VP, 6x.013, S467 FMW, Goerend Trans, Caltracs.
Fuel only - 11.85 @ 114, 50 Shot - 11.58 @ 116 w/ 1.69 60'
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01-04-2014, 01:05 PM
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#11
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Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
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Posts: 2,978
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On the bench, if you hook up a regulated supply to the bottom port, as soon as the valve lifts, I hear air passing through the valve guide. (Clearance of course.)
If I am using a boost controller, would I not plug the bottom port, as the control is done through the top port only. (Solenoid energized to keep gate closed, another solenoid to bleed pressure off the top, opening the gate...nothing on bottom port at all.)
Leaving it open just allows the soot to pass through the bottom port, an just gets everything dirty.
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph
If It Ain't Broke...Fix It Until It Is!!!
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01-04-2014, 07:59 PM
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#12
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Name: Hurley
Title: BLAKLUNG
Status: Not Here
Join Date: Apr 2008
Location: Statesville, NC
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Posts: 3,698
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Quote:
Originally Posted by TheNatural31
Let it vent to atmosphere.
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fwiw, this was the best control I had as well.
__________________
THIS
IS
COMPD.
95 2500 RCSB 2wd back-halfed and 4-linked
5x14/7mm +100cc/4k/11-blade billet 63/68/.91 T4
539/989
03 RCLB 4x4, SSR
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01-04-2014, 08:24 PM
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#13
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Name: jgsturbo
Title: caveman
Status: Not Here
Join Date: Dec 2011
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Posts: 483
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If you PLUG the lower port the gate will draw air from the guide but then it will be awful slow to return, not good.
I dream of a seal that would actually last but its nto an option in the given situation.
Tighter clearances = a higher jamming risk.
Looking in to some coatings that will keep the soot from sticking.
__________________
Lance Humbert
JGS Precision Turbo Control Products
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01-04-2014, 08:46 PM
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#14
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Name: Extended Power
Title: Too Much Time
Status: Not Here
Join Date: May 2006
Member`s Gallery
Posts: 2,978
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Quote:
Originally Posted by jgsturbo
If you PLUG the lower port the gate will draw air from the guide but then it will be awful slow to return, not good.
I dream of a seal that would actually last but its nto an option in the given situation.
Tighter clearances = a higher jamming risk.
Looking in to some coatings that will keep the soot from sticking.
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I'm thinking of running an air system, so no more hot dirty air inside the cylinder. (Yes, I have a filter on the lines now.)
Shouldn't be a slow return using solenoids to pressure up, and vent off the top of the actuator. (Air to close it, and vent it off to open it.)
__________________
2003 Ford KingRanch F-350 4x4
793HP fuel only
12.2 @ 113.06mph
If It Ain't Broke...Fix It Until It Is!!!
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