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12-12-2009, 12:17 AM
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#1
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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Walrbo 255 limits
Does anyone know a way to find the HP limits a 255lph pump can support?
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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12-12-2009, 12:22 AM
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#2
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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A hotwired/racetronix kit is good to about ~500 WHP.
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1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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12-12-2009, 12:23 AM
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#3
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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Yea, was worried about that. Thanks.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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12-12-2009, 10:41 AM
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#4
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,215
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Run a voltage booster if you need the extra fuel. There is nothing wrong with a voltage booster, in fact it's better for the pump than the stock setup that adds resistance to slow the pump down. I'll have to look around, but I thought I remember an article showing LS1 Corvettes making 550-600 rwhp with the stock pump and the voltage booster with no problems.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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12-12-2009, 10:44 AM
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#5
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
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http://www.slowgt.com/Calc1.htm#FPHP
seems like a Brake specific fuel consumption of .6 and estimated flywheel hp of just under 700 puts you at the 255 range. dual walbros!
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12-12-2009, 02:29 PM
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#6
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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Quote:
Originally Posted by JL8Jeff
Run a voltage booster if you need the extra fuel. There is nothing wrong with a voltage booster, in fact it's better for the pump than the stock setup that adds resistance to slow the pump down. I'll have to look around, but I thought I remember an article showing LS1 Corvettes making 550-600 rwhp with the stock pump and the voltage booster with no problems.
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Voltage booster as in the hotwire kit Jeff?
And Adam I was thinking just a standalone instead of dual pumps.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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12-12-2009, 02:36 PM
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#7
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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If I am right, Jeff means like a MSD, Boost-a-pump
__________________
1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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12-12-2009, 05:26 PM
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#8
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,215
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Boost a pump voltage booster. I think the info was on the Kenne Bell website. Hotwire gets you more than the stock wiring setup but the boost a pumps jump it up closer to 17 volts I think.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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12-12-2009, 08:42 PM
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#9
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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@ 490 hp, car dropped off with fuel. so i would say a tad under 500hp (rwhl #'s)
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Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
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12-12-2009, 09:32 PM
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#10
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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That was a boost car right?
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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12-12-2009, 10:06 PM
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#11
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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yea
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Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
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12-13-2009, 10:23 AM
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#12
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,215
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There's a ton of tech infor on the Kenne Bell site. I searched around and finally found the reference.
Quote:
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8.BOOST-A-PUMP(Corvette Kits) These graphs illustrate the flow and pressure differences between a stock Corvette fuel pump and the same pump equipped with the Kenne Bell BOOST-A-PUMP. A good rule of thumb is 10 psi of fuel pressure will affect AF ratio by a potentially dangerous 8%. The Corvette pump flow is increased from 134 to 232L @ 60 psi with the BOOST-A-PUMP. That's a whopping 385lbs of fuel, enough for 600rwhp supercharged. In the Corvette, a "255L" Walbro is 192L @ 60 psi and 274L or 454 lbs fuel with the BOOST-A-PUMP or enough fuel for 750 rwhp. Subtract 20 lbs fuel for every 10 psi of boost pressure if fuel pressure is not increased to compensate for the higher manifold pressure.
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http://www.kennebell.net/techinfo/gm...e_TechTips.pdf
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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12-13-2009, 12:19 PM
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#13
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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Thanks Jeff, but thats for a power application where the increase in fuel can be added linearly. I am more worried about a sudden 150 shot pushing the pump to much in too short a time period and have fuel pressure just face plant.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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12-13-2009, 12:26 PM
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#14
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
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an auxiliary fuel system would sure stop that from happening.....
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12-13-2009, 02:00 PM
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#15
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,215
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Quote:
Originally Posted by LTs1ow
Thanks Jeff, but thats for a power application where the increase in fuel can be added linearly. I am more worried about a sudden 150 shot pushing the pump to much in too short a time period and have fuel pressure just face plant.
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The boost-a-pump can also be rpm triggered I believe so that should work with nitrous wouldn't it? Check with Injuneer Fred to see how he set up his car for nitrous.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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12-13-2009, 02:19 PM
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#16
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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aeromotive sells a nice fuel pump booster/controller too.
__________________
Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
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12-13-2009, 03:02 PM
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#17
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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Quote:
Originally Posted by JL8Jeff
The boost-a-pump can also be rpm triggered I believe so that should work with nitrous wouldn't it? Check with Injuneer Fred to see how he set up his car for nitrous.
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He runs a separate pump for the nitrous.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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12-13-2009, 03:35 PM
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#18
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
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Quote:
Originally Posted by LTs1ow
He runs a separate pump for the nitrous.
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i think what he means is you don't have to have the boost-a-pump always on overworking the fuel pump. when you need it, it can be triggered on.
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12-13-2009, 04:49 PM
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#19
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NJFBOA Supporting Sponsor
Join Date: Feb 2006
Location: HULMEVILLE, PA
Posts: 2,023
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255lph of gasoline is good to:
806.4 BHP N/A
672 BHP F/A
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JSSPEEDANDCUSTOM.COM
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12-20-2009, 11:04 PM
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#20
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Guest
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Just run a stand alone, it will get you ready for when you have a built
bottom end and want to hit it with a larger shot. Not only that but it's cheaper to run c16 in that than in the whole tank and safer than spraying on pump gas
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12-21-2009, 02:15 PM
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#21
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Join Date: Sep 2009
Location: Staten Island, NY
Posts: 206
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i have the 255 plus the hot wire kit never saw a problem with fuel drop
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383 Motor with 9:1, P1SC Procharger and much more
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