Powerglide Dump Valve Usage - Page 2 - Yellow Bullet Forums
;

Go Back   Yellow Bullet Forums > Technical Section > Transmission - Hutch's Transmission Service

Transmission - Hutch's Transmission Service

Reply
 
Thread Tools Display Modes
Old 09-07-2019, 10:18 PM   #16
allan5oh
Member
Pullin gears
 
allan5oh's Avatar
 
Join Date: Oct 2012
Posts: 950
Default

Quote:
Originally Posted by PR_Jr View Post
Quote:
Originally Posted by VtamRLN View Post
Quote:
Originally Posted by Hutch View Post
Where is this connected to? Internal in the trans or in the cooler line?


Hutch

The Dump Valve replaces the Servo cover. Everything works as normal when not engaged. When activated some of the fluid servicing the backside of the servo gets rerouted back to the pan instead of going to the converter charge port. (my understanding).
I’m so confused.... my head may explode
What hes saying is its an external dump not an internal dump. Squat to do with converter pressure. This issue seems to come up a lot.
__________________
WILLING TO SELL RIGHTS TO AVATAR FOR ONE FREE ECU
allan5oh is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-07-2019, 10:20 PM   #17
Hutch
Transmission Specialist
Smoked Another SBC
 
Hutch's Avatar
 
Join Date: Mar 2005
Location: London Ontario Canada
Posts: 18,793
Default Re: Powerglide Dump Valve Usage

I am very aware of the workings of this trans. The device described has no use as I stated earlier.


Hutch
__________________
www.hutchtrans.com
519-453-4318
Hutch is offline   Reply With Quote
Old 10-20-2019, 09:41 PM   #18
VtamRLN
Junior Member
Launchin
 
VtamRLN's Avatar
 
Join Date: Sep 2009
Location: Charlestown, IN
Posts: 458
Garage
Default Re: Powerglide Dump Valve Usage

Testing results were definitive although not what I was hoping for.


Baseline pass 1.044 2.953 4.551 @ 153.11


Pass 1 w Dump Valve .000-1.000 1.057 2.979 4.578 @ 153.11


I believe in A-B-A testing. A-B-A-B if possible




Base pass 2 1.045 2.957 4.555 @ 153.10



Pass 2 w Dump Valve .000-1.000 1.058 2.978 [email protected] 153.10


Conditions for Pass 2 had deteriorated a bit and and was starting to get dew-ey.


Observations: While I did see approximately 200-250 RPM stall increase on the Racepak, what I did not anticipate was a slower 60 ft. My car was dead hooking on the baseline passes and was handling full launch hit. The higher RPM was not as hard even though the RPM was higher. I could definitely feel the coupling when the dump valve closed. If I had been slipping on the launch, I think the softer hit would have been very helpful.


The engine tune-up was a little lean. I actually anticipated something more like 154.5+ MPH. On my car, the MPH gets super consistent when lean although a bit slower e.t.
VtamRLN is offline   Reply With Quote
Old 10-20-2019, 10:05 PM   #19
Hutch
Transmission Specialist
Smoked Another SBC
 
Hutch's Avatar
 
Join Date: Mar 2005
Location: London Ontario Canada
Posts: 18,793
Default Re: Powerglide Dump Valve Usage

If connected to the servo cover as it was said to be, I would expect the band to slip affecting reaction times and the 60ft with a complete band meltdown shortly thereafter.


Hutch
__________________
www.hutchtrans.com
519-453-4318
Hutch is offline   Reply With Quote
Old 10-21-2019, 10:51 AM   #20
VtamRLN
Junior Member
Launchin
 
VtamRLN's Avatar
 
Join Date: Sep 2009
Location: Charlestown, IN
Posts: 458
Garage
Default Re: Powerglide Dump Valve Usage

Perhaps my understanding of how it works is incorrect.
My documentation of performance is accurate.
As it is not accomplishing my objective....a little higher stall resulting in moving me a bit more into the power band w potentially better performance.....I doubt I will use it very much. If I happen to be in adverse conditions (poor track prep or slippery conditions), I will probably give it a shot.

It does seem odd that FTI would produce a product that would lead to other component failure?? I suspect they have tested this solution extensively and have not encountered the problem you describe.
VtamRLN is offline   Reply With Quote
Old 10-21-2019, 02:50 PM   #21
Hutch
Transmission Specialist
Smoked Another SBC
 
Hutch's Avatar
 
Join Date: Mar 2005
Location: London Ontario Canada
Posts: 18,793
Default Re: Powerglide Dump Valve Usage

By your description of the plumbing that was my take. I have to believe your description to be accurate unless you can point me in the direction of an explanation or photo of it.


Hutch
__________________
www.hutchtrans.com
519-453-4318
Hutch is offline   Reply With Quote
Old 10-21-2019, 06:47 PM   #22
autotransdesign
Member
Pullin gears
 
autotransdesign's Avatar
 
Join Date: Nov 2013
Location: Germantown, WI
Posts: 947
Default Re: Powerglide Dump Valve Usage

Hutch,
FTI incorporated the dump valve mount into the servo cover. It uses conventional plumbing, cooler feed to the solenoid, dump oil to sump, route residual tothe cooler return.
__________________
Automatic Transmission Design, Inc.
www.autotransdesign.com
autotransdesign is offline   Reply With Quote
Old 10-21-2019, 08:18 PM   #23
Rick!
Member
Pullin gears
 
Rick!'s Avatar
 
Join Date: May 2014
Location: West Fargo
Posts: 946
Garage
Default Re: Powerglide Dump Valve Usage

Not a glide but I would the concept is the same...


Rick! is online now   Reply With Quote
Old 10-21-2019, 08:41 PM   #24
Hutch
Transmission Specialist
Smoked Another SBC
 
Hutch's Avatar
 
Join Date: Mar 2005
Location: London Ontario Canada
Posts: 18,793
Default Re: Powerglide Dump Valve Usage

Quote:
Originally Posted by autotransdesign View Post
Hutch,
FTI incorporated the dump valve mount into the servo cover. It uses conventional plumbing, cooler feed to the solenoid, dump oil to sump, route residual tothe cooler return.
So the solenoid is only mounted to the cover but does not get oil supply from the servo feed.


Hutch
__________________
www.hutchtrans.com
519-453-4318
Hutch is offline   Reply With Quote
Old 10-21-2019, 11:44 PM   #25
autotransdesign
Member
Pullin gears
 
autotransdesign's Avatar
 
Join Date: Nov 2013
Location: Germantown, WI
Posts: 947
Default Re: Powerglide Dump Valve Usage

^^^^ Correct
__________________
Automatic Transmission Design, Inc.
www.autotransdesign.com
autotransdesign is offline   Reply With Quote
Old 10-23-2019, 05:12 PM   #26
redvictor
from across the pond...
Smoked Another SBC
 
redvictor's Avatar
 
Join Date: Mar 2005
Posts: 6,916
Garage
Default Re: Powerglide Dump Valve Usage

Better to say governer cover, as servo cover is not what that contraption is bolted to...
__________________
Gone from this place...
redvictor is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-23-2019, 08:54 PM   #27
autotransdesign
Member
Pullin gears
 
autotransdesign's Avatar
 
Join Date: Nov 2013
Location: Germantown, WI
Posts: 947
Default Re: Powerglide Dump Valve Usage

^^^^^ It is on a Glide, as that is what the OP has....
__________________
Automatic Transmission Design, Inc.
www.autotransdesign.com
autotransdesign is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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



All times are GMT -4. The time now is 12:14 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 0%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Yellow Bullet LLC
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.