Fuel System Help 700rwhp
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Fuel System Help 700rwhp
Right now I wave a dual Walbro external setup but the pumps keep crapping out. What are people running to support the power I have? The external Walbro just isn't working out.
Racer
Joined: Jul 2008
Posts: 273
Likes: 2
You can use this switch and adjust it at 2 psi of boost to kick the second pump.
http://www.summitracing.com/search/p...boost-switches
http://www.horsepowerfreaks.com/part...l_System/18678
Racer
Joined: Jun 2012
Posts: 492
Likes: 1
That could be the problem, that they both external. I assume that means you have the stock internal pump as well? If so, that means both external pumps have to draw everything through the stock single pump and sock. Perhaps try swapping out the internal pump to better one or 2 better ones rather than using external pumps. Also the stock wiring is very small. If you only have the external pumps and nothing internally, maybe the bulkhead you used is too small? Are you boost referenced? How much boost are you running and what is your fuel pressure at WOT?
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
No internal, tank is tapped, -10. 14lbs an second pump comes on at 4lbs. Fuel pressure is 60psi. Racetrnix harness as well.
I thought about the pumps not being able to suck enough fuel from the fittings, or just burning up cause of the heat.
What I would really like is advise on some kind of internal setup. I do not mind completely redoing my fuel system rather than working with what I have. I just want something that would be relatively reliable.
I thought about the pumps not being able to suck enough fuel from the fittings, or just burning up cause of the heat.
What I would really like is advise on some kind of internal setup. I do not mind completely redoing my fuel system rather than working with what I have. I just want something that would be relatively reliable.
Melting Slicks
Joined: Jun 2011
Posts: 2,315
Likes: 53
From: VERNON CT
im in the same boat as you howerver ill be closer to 800whp and by summer aiming for 1000whp.
i was trying to get more info on this
http://www.coloradospeed.com/aeromot...e-p-15182.html
i was looking into maybe a magnafuel pump on a hobbs switch so i don't have to listen to the obnoxiously loud pump all the time, just when im wot.... they have pumps for about $400 that can support 1000-2000hp.
i was trying to get more info on this
http://www.coloradospeed.com/aeromot...e-p-15182.html
i was looking into maybe a magnafuel pump on a hobbs switch so i don't have to listen to the obnoxiously loud pump all the time, just when im wot.... they have pumps for about $400 that can support 1000-2000hp.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
im in the same boat as you howerver ill be closer to 800whp and by summer aiming for 1000whp.
i was trying to get more info on this
http://www.coloradospeed.com/aeromot...e-p-15182.html
i was looking into maybe a magnafuel pump on a hobbs switch so i don't have to listen to the obnoxiously loud pump all the time, just when im wot.... they have pumps for about $400 that can support 1000-2000hp.
i was trying to get more info on this
http://www.coloradospeed.com/aeromot...e-p-15182.html
i was looking into maybe a magnafuel pump on a hobbs switch so i don't have to listen to the obnoxiously loud pump all the time, just when im wot.... they have pumps for about $400 that can support 1000-2000hp.
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Melting Slicks
Joined: Jun 2011
Posts: 2,315
Likes: 53
From: VERNON CT
i was trying to find more info on it like how wide the mounting plate was. if its the right dimensions you may be able to make it work. i have a 99 aswel. just seems no one has any info on it.
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
Get rid of the crappy Walbros and put Bosch 044 pumps on it....
I have had nothing but problems with Walbro pumps through the years on my other cars and bikes... Now I run Bosch 044s and have had no more problems.... A single Bosch 044 will support 600rwhp on our busas with no meth..
I would have each pump on its own line, have both feeding a fuel log then going to the rail.
On my C5z, I have an LPE 225lph in tank pump for driving around on, using a Racetronix hot wire kit and the stock fuel line and tying into a fuel log. Then I have an external Bosch 044 on its own -8an line going to the same fuel log....The external bosch is on a Hobbs switch and uses a KB BAP.
I have WAY more fuel then I have power...(ofcourse a ton of meth helps). I have had no issues with this setup.... I am sure this setup would support 1000rwhp with meth, if not more, and drives like a stock car with no additional noise or fuel boiling.
I have had nothing but problems with Walbro pumps through the years on my other cars and bikes... Now I run Bosch 044s and have had no more problems.... A single Bosch 044 will support 600rwhp on our busas with no meth..
I would have each pump on its own line, have both feeding a fuel log then going to the rail.
On my C5z, I have an LPE 225lph in tank pump for driving around on, using a Racetronix hot wire kit and the stock fuel line and tying into a fuel log. Then I have an external Bosch 044 on its own -8an line going to the same fuel log....The external bosch is on a Hobbs switch and uses a KB BAP.
I have WAY more fuel then I have power...(ofcourse a ton of meth helps). I have had no issues with this setup.... I am sure this setup would support 1000rwhp with meth, if not more, and drives like a stock car with no additional noise or fuel boiling.
Supporting Vendor
Joined: Dec 2001
Posts: 1,573
Likes: 31
From: A dealer near you.
Do you have a filter(s) before your pumps and if so what type and micron rating?
Are you running a single -10 line to each pump?
Are you using rubber or Teflon lines?
Premium Supporting Vendor
Joined: Oct 2004
Posts: 23,599
Likes: 1,226
From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
We have 100's of these systems out there working flawlessly for years, we are running a winter special now of $1,195.
Bosch 044 pump, all hose, wiring, custom fuel supply block, and upgrades are easily made to the same system if you increase power down the line.
http://www.eastcoastsupercharging.co...ategory_id=302
Bosch 044 pump, all hose, wiring, custom fuel supply block, and upgrades are easily made to the same system if you increase power down the line.
http://www.eastcoastsupercharging.co...ategory_id=302
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Is the split to -6 not providing enough fuel to the pump?
We have 100's of these systems out there working flawlessly for years, we are running a winter special now of $1,195.
Bosch 044 pump, all hose, wiring, custom fuel supply block, and upgrades are easily made to the same system if you increase power down the line.
http://www.eastcoastsupercharging.co...ategory_id=302
Bosch 044 pump, all hose, wiring, custom fuel supply block, and upgrades are easily made to the same system if you increase power down the line.
http://www.eastcoastsupercharging.co...ategory_id=302
Supporting Vendor
Joined: Dec 2001
Posts: 1,573
Likes: 31
From: A dealer near you.
Everybody is so quick to trash the pumps or try to sell this person a new system. The best solution is to figure out what is wrong with his current configuration in the hopes of correcting it with minimal expense.
Supporting Vendor
Joined: Dec 2001
Posts: 1,573
Likes: 31
From: A dealer near you.
How are you feeding the jet pump in the P/S tank?
Where did you purchase your components / pumps etc.?
What type of media does your 80-micron pre-filter use and what is its flow capacity/pressure drop?
Most in-line pumps have weak suction so they should be ideally mounted under the fuel level in the tank. Your -6 feed lines may be of issue especially if they are rubber.
Rubber lines should not be used in a C5+. Apart from not meeting CARB requirements for vapor penetration (constant smell of fuel), they will break down and swell over time. Rubber bits can make their way into various C5 fuel system components over time causing system failure. Gearotor pumps (GSL392), check valves and jet pumps (part of the Corvette dual-tank transfer system) will suffer b/c of their tight clearances and tendency to clog. Rubber hose once softened due to exposure to solvents in pump gas will sometimes start to collapse under suction. Bottom line is that Teflon lines should be used in all new vehicle fuel systems. This is why C5/C6 factory fuel systems do not use ANY rubber parts!
If you wish to discuss your problem further, you may e-mail our tech dept. support@racetronix.com.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
How high above the bottom of the tank, are the pumps mounted?
How are you feeding the jet pump in the P/S tank?
Where did you purchase your components / pumps etc.?
What type of media does your 80-micron pre-filter use and what is its flow capacity/pressure drop?
Most in-line pumps have weak suction so they should be ideally mounted under the fuel level in the tank. Your -6 feed lines may be of issue especially if they are rubber.
Rubber lines should not be used in a C5+. Apart from not meeting CARB requirements for vapor penetration (constant smell of fuel), they will break down and swell over time. Rubber bits can make their way into various C5 fuel system components over time causing system failure. Gearotor pumps (GSL392), check valves and jet pumps (part of the Corvette dual-tank transfer system) will suffer b/c of their tight clearances and tendency to clog. Rubber hose once softened due to exposure to solvents in pump gas will sometimes start to collapse under suction. Bottom line is that Teflon lines should be used in all new vehicle fuel systems. This is why C5/C6 factory fuel systems do not use ANY rubber parts!
If you wish to discuss your problem further, you may e-mail our tech dept. support@racetronix.com.
How are you feeding the jet pump in the P/S tank?
Where did you purchase your components / pumps etc.?
What type of media does your 80-micron pre-filter use and what is its flow capacity/pressure drop?
Most in-line pumps have weak suction so they should be ideally mounted under the fuel level in the tank. Your -6 feed lines may be of issue especially if they are rubber.
Rubber lines should not be used in a C5+. Apart from not meeting CARB requirements for vapor penetration (constant smell of fuel), they will break down and swell over time. Rubber bits can make their way into various C5 fuel system components over time causing system failure. Gearotor pumps (GSL392), check valves and jet pumps (part of the Corvette dual-tank transfer system) will suffer b/c of their tight clearances and tendency to clog. Rubber hose once softened due to exposure to solvents in pump gas will sometimes start to collapse under suction. Bottom line is that Teflon lines should be used in all new vehicle fuel systems. This is why C5/C6 factory fuel systems do not use ANY rubber parts!
If you wish to discuss your problem further, you may e-mail our tech dept. support@racetronix.com.
Thank you for the info.
Premium Supporting Vendor
Joined: Oct 2004
Posts: 23,599
Likes: 1,226
From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
jobberone
Joined: Aug 2003
Posts: 2,062
Likes: 8
From: Kailua Kona HI
Not one answer. I run a Walbro internal and have an Aero external for my 346 running about 800 RW on high boost. If you're going to do it yourself either engineer your own or buy and tried and true system and install it yourself. There are vendors who will help you.
