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Drag Racing Where ALL Racers are Welcome- From ET Bracket, all the way to ProStreet and Top Diesel! |
05-10-2019, 09:53 AM
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#1
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Name: fosterriley
Title: Just wanna go fast
Status: Not Here
Join Date: Apr 2015
Location: Oakdale/Bozeman
Member`s Gallery
Posts: 169
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48RE Dump valve
Got a few questions about 48RE dump valves.
If one was running a large single on the street and wanted to keep a tighter converter for efficiency purposes would you be able to use a dump valve to get on the charger. Then shut it once up on boost or will this cause issues with fluid temp/converter temp. Would the truck try to push through the brakes once closed?
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2006 5.9 HX60, Steed, Exergy 250%, GPD Fuelboss, dual pumps, Cope Billet 48re valvebody, CA tuned
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05-11-2019, 02:10 AM
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#2
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Name: jlibert
Title: Too Much Time
Status: Not Here
Join Date: Jun 2007
Location: CA
Member`s Gallery
Posts: 3,454
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It’s not something you’d use while cruising around on the street. It’s intended for spool up in a drag racing application. Using It doesn’t seem to have any major effect on fluid temp.
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05-11-2019, 11:17 PM
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#3
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Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,310
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We only use our dump valve when triggering the transbrake. Josh our employee uses one on his race truck without a transbrake but he uses it like w spoolaid at the drag strip. On a lockup converter with full release pressure flow, it raises stall speed about 250 to 300 RPM.
__________________
95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm
OEM 12v Block
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05-11-2019, 11:22 PM
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#4
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Name: JQmile
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Nov 2006
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Posts: 6,976
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Manually shift it to keep smoke down and spoolage up on the street.
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89 Dodge 972rwhp on the hose, still a VE!
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05-13-2019, 10:37 AM
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#5
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Name: fosterriley
Title: Just wanna go fast
Status: Not Here
Join Date: Apr 2015
Location: Oakdale/Bozeman
Member`s Gallery
Posts: 169
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JP, Yes I I understand that it would not be used during the street driven applications. But it would be used for staging.
Todd, When josh uses that to get on the charger does he release the switch on the launch?
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2006 5.9 HX60, Steed, Exergy 250%, GPD Fuelboss, dual pumps, Cope Billet 48re valvebody, CA tuned
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05-13-2019, 11:24 AM
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#6
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Name: 04DEEZELRAM
Title: Offshore operations
Status: Not Here
Join Date: Nov 2007
Location: Kentucky
Member`s Gallery
Posts: 416
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I also interested in one on my 47re
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2017 Ram 3500: Some parts fell off
1999 ECSB cummins: race truck build for paul...big turbo and a lot of fuel
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05-13-2019, 02:29 PM
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#7
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Name: fosterriley
Title: Just wanna go fast
Status: Not Here
Join Date: Apr 2015
Location: Oakdale/Bozeman
Member`s Gallery
Posts: 169
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Quote:
Originally Posted by Big Blue24
We only use our dump valve when triggering the transbrake. Josh our employee uses one on his race truck without a transbrake but he uses it like w spoolaid at the drag strip. On a lockup converter with full release pressure flow, it raises stall speed about 250 to 300 RPM.
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Correction Will*, When josh uses that to get on the charger does he release the switch on the launch? Sorry about that
__________________
2006 5.9 HX60, Steed, Exergy 250%, GPD Fuelboss, dual pumps, Cope Billet 48re valvebody, CA tuned
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05-21-2019, 10:47 AM
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#8
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Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,310
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Quote:
Originally Posted by fosterriley
Correction Will*, When josh uses that to get on the charger does he release the switch on the launch? Sorry about that
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Yes, with the low compression 5.9 and single 488, Josh needed to use the dump valve to get the turbo lit at the starting line, otherwise he had to carefully spray the perfect sized spool jet to get it to light.
When he launches, he releases the button similar to releasing a transbrake. The converter doesn't recover immediately meaning it acts extra loose during the first 20 to 30' which lets him launch with more boost than normal and then the converter tightens back up once it get's fully charged with fluid.
__________________
95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm
OEM 12v Block
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05-21-2019, 09:42 PM
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#9
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Name: 91shelbydaytona
Title: Too Much Time
Status: Not Here
Join Date: Nov 2008
Location: Viroqua, WI
Member`s Gallery
Posts: 334
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Does anyone make such a thing for a 47rh?
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Chris
94 1500 RCSB 12v, Joker Fabrication, Farrell Diesel Service, Hamilton Cams, Airdog
11.40 @ 119.28
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05-21-2019, 11:42 PM
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#10
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Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,310
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I'm not sure what other transmission builders offer or sell, but we can and have added dump valves to 47rh, 47re, and 48re models. Our dump valve requires case modifications, it's not a simple VB swap. The dump valve on JP's truck might be 100% VB mods, I haven't seen it in person.
__________________
95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm
OEM 12v Block
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05-22-2019, 07:40 PM
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#11
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Name: PRINCETON_JAKE
Title: Too Much Time
Status: Not Here
Join Date: Jan 2010
Location: Princeton Minnesota
Member`s Gallery
Posts: 1,125
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Doesn’t Goerend have a patent on the dump valve?
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silver 2006 ram 2500 4x4, crew cab short box, 48RE auto with "stuff" done, 5.9 with more "stuff" done
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