I was asking about the billet coupler. I have ran a stainless y from grainger industrial supply before, and was just wondering if the path in the coupler has a path of a y. I see the pump outlet is dwarfed by a -6 an let alone a -8 fitting. Is your response to say the coupler is the last thing to worry about in terms of flow? Also just curious on how the heck that coupler seals completely, it seems a little loose on the pumps. I would think aproaching 70 psi just being pushed into a oring in that coupler. It must work though, I would think if it leaked the least bit at all it would show up under pressure on a hard run.
New racetronix dual in-tank fuel systems
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Racetronix
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More than enough flow in coupler.
O-rings do not leak at high pressure.
If you have any further questions of this nature please e-mail sales@racetronix.com.
I only asked on this forum because I am part of the buick community and would like this infomation to be shared with other buick guys who are interested in this product that is advertised on this forum. I do not spend anytime on your forum, and I have emailed you with questions, I have always had my questions answered. I would have assumed since it is advertised here it would be appropriate to chat about it here. Please do not take that the wrong way. I appreciate the products you have brought to us! I am assuming you do not know what the path flow is in that coupler, no problem just wondering.
Racetronix
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The DP is designed with all the best components possible while allowing it to be serviceable.
The most relevant question is whether or not the system delivers the fuel you require using dual 255LPH or 340LPH pumps.
We have posted the flow specs for both pumps.
Racetronix
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Fuel rail feed fittings:
-6 X 16mm X 1.5 Male O-Ring, F.I.
or
-8 X 16mm X 1.5 Male O-Ring, FI
Fuel rail return fitting:
-6 X 14mm X 1.5 Male O-Ring, F.I., BLK
Front frame rail fittings:
Feed:
6 X 16mm X 1.5 Female, “O” Ring Seal
or
-8 X 16mm X 1.5 Female, “O” Ring Seal
Return:
-6 X 14mm X 1.5 Female, “O” Ring Seal
or
-8 X 14mm X 1.5 Female, “O” Ring Seal
KEVLAR/TEFLON LINES COMING SOON!!!
-6 X 16mm X 1.5 Male O-Ring, F.I.
or
-8 X 16mm X 1.5 Male O-Ring, FI
Fuel rail return fitting:
-6 X 14mm X 1.5 Male O-Ring, F.I., BLK
Front frame rail fittings:
Feed:
6 X 16mm X 1.5 Female, “O” Ring Seal
or
-8 X 16mm X 1.5 Female, “O” Ring Seal
Return:
-6 X 14mm X 1.5 Female, “O” Ring Seal
or
-8 X 14mm X 1.5 Female, “O” Ring Seal
KEVLAR/TEFLON LINES COMING SOON!!!
Racetronix
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- Joined
- Oct 1, 2001
- Messages
- 1,590
Q1. Is the Hobbs pressure switch included with the DP system?
A1. The Hobbs pressure switch and interface harness are OPTIONS you can select via the drop-down menu in our web store. These are listed as options because not all customers require them. Some customers have computers, which can control both pumps via the jumpers (shown in our picture) on our dual harness. Some customers have upgraded return lines and chose to run both pumps all the time. We recommend using either your computer or our Hobbs switch to control the second pump. This reduces the electrical load, fuel heating and wear on the secondary pump. The primary and secondary pump may be easily switched by swapping the control jumpers if you wish to balance out the run-time on the pumps. The DP harness comes with both control jumpers plugged in as shown in our ad. In addition to this the DP harness comes with a Weather-Pack connector so you can interface the secondary pump control to your aftermarket computer or any pull-to-ground signal.
Q2. Can other pumps be used in the DP sender as an option?
A2. Only Walbro 255LPH, Racetronix RXP340M and Aeromotive 11140 340LPH pumps will fit through the tank opening side-by-side. It is a VERY tight fit. The DW and Siemens will not fit!
Q3. Is the DP system E85 compatible?
A3. The Buick fuel system was never designed for use with E85. True E85 certified systems have their electrical connections fully isolated from the fuel and the internal pump components that come in contact with the fuel are made of special plastics and nickel. Some HP pump vendors are currently marketing their pumps as E85 compatible but there is just as much compatibility with their construction as there is to a Walbro 255. Customers have been running E85 with the Buick sender and Walbro 255 pumps but we cannot vouch for their longevity. If you use E85, you do so at your own risk. Racetronix RXP340M and Aeromotive 11140 pumps may be used with reduced life expectancy.
Q4. I have your D-I-Y DP kit on a factory sender and I would like to upgrade / replace the sender. Can I buy the sender with the required parts?
A4. If you have our DP D-I-Y kit and would like to buy the parts we can help you BUT we MUST KNOW which parts you purchased. Some customers bought our kit with the brass pump coupler or silver/red billet coupler. If you have the brass coupler you will need to purchase the billet unit. If you have the billet coupler and it is being used on the factory, sender you will require a larger outlet o-ring to be able to place it on the new Racetronix sender b/c the tube OD is much larger. The dual pump mount may be re-used. The bulkhead, in-tank and intermediate wiring have all been upgraded and come pre-installed on the SS sender. If you have your sales order or invoice number, please supply it along with your e-mail inquiry.
Q5. Can the single Racetronix Hotwire Harness be used to power the new DP system?
A5. No it cannot. The harness for the DP system is very different in almost all aspects.
Q6. Can I buy the entire DP system in a D-I-Y format?
A6. We are only selling a DP D-I-Y kit for the purpose of installing it on a factory GM sender. Our complete assembled and tested DP kit is not that much more than the D-I-Y kit so in effect the assembly, testing and sender are being included at a minimal price. We prefer to assemble all the DP systems here to rule out any problems and to ensure that every DP system that ships meets stringent performance specifications.
Q7. I already have some Walbro 255LPH pumps. Can I use them with your system?
A7. Only the GSS340M and GSS294M pumps can be used with our dual pump mount bracket. This bracket is designed to accommodate pumps with a machined 22mm centered inlet ONLY! The non 'M' version of the GSS340 supplied by other vendors will not work (this is for a mustang application). The GSS341, GSS342, F20000169 pumps will not work. Please note that you are responsible for any damage or lack of performance as a byproduct of installing your own pumps.
Q8. I have heard some bad things about Walbro pumps on this forum. Are there other options?
A8. This is old news. The pump in question was the F20000169. Racetronix never sold this with any of our Buick-specific kits. Racetronix has always bundled the GSS340M pumps with our kits so our customers did not have the multitude of problems people had to deal with YEARS ago. Racetronix is currently bundling the GSS294M with its single and dual kits. This pump has the same guts and spec as the GSS340M. Racetronix adjusts the pressure relief valve on the GSS294M to guarantee improved performance at elevated operating pressures.
Q9. I have a digital dash car. Do you have a sender for me?
A9. Yes, please select the digital dash level sender in the drop-down menu in our web store.
Q10. What size of fuel line do you recommend if I decide to upgrade?
A10. We recommend a Teflon braided -8 feed and a -6 return line. We do not recommend any type of rubber (braided or not) for use with modern-day fuels. These Teflon lines will be more than able to support the full performance of our DP system.
Q11. Where is the biggest restriction in the fuel system?
A11. The factory steel lines running up the front of the motor.
Q12. Is the factory filter able to flow enough for the DP system.
A12. A clean factory filter is more than adequate. We do not recommend most aftermarket cartridge paper filters or SS mesh filters. The idea here is to protect the motor.
Q13. Can I use a volt-booster with your system?
A13. Yes, increased system voltage benefits pump performance.
Q14. What brand of fuel pressure regulator do you recommend?
A14. Accufab
Q15. Where do I get support?
A15. Via our support forum 24/7. The web URL which explains how to register is listed in our sales orders, sales invoices and packing slips.
Q16. Do you offer a -10 / -8 outlet version of this sender?
A16. We do not offer a -10 / -8 outlet version. The -8 / -6 version is more than large enough to support the fuel volume two pumps provide. You can see the oultet comparisons here for a comparison:http://www.racetronix.com/images/Fuel_Pumps/Walbro_pump_head-a.jpg
The outlet tubes will not easily accept larger fittings. If your motor really needs -10 / -8 lines to support the HP it produces then perhaps a dedicated external fuel system is worth considering. We offer in-line Weldon gear and Walbro screw pumps in our web store.
Q-SPEC. What are the performance specs of the DP system?
A-SPECS:
These are the typical specs with 2 x Walbro 255LPH pumps:
500LPH @ 43.5PSI @ 13.5V @ 15.9A
425LPH @ 58.0PSI @ 13.5V @ 18.5A
625LPH @ 43.5PSI @ 16.0V @ 17.6A
577LPH @ 58.0PSI @ 16.0V @ 20.6A
345LPH @ 80.0PSI @ 13.5V @ 23.4A
432LPH @ 80.0PSI @ 16.0V @ 26.2A
These are the typical specs with 2 x 340LPH pumps (UPDATED 2/15/13):
680LPH @ 43.5psi @ 13.5v @ 22.5A
820LPH @ 43.5psi @ 16.0v @ 27.5A
635LPH @ 58.0psi @ 13.5v @ 24.5A
790LPH @ 58.0psi @ 16.0v @ 29.5A
550LPH @ 80.0psi @ 13.5v @ 28.0A
710LPH @ 80.0psi @ 16.0v @ 32.5A
A1. The Hobbs pressure switch and interface harness are OPTIONS you can select via the drop-down menu in our web store. These are listed as options because not all customers require them. Some customers have computers, which can control both pumps via the jumpers (shown in our picture) on our dual harness. Some customers have upgraded return lines and chose to run both pumps all the time. We recommend using either your computer or our Hobbs switch to control the second pump. This reduces the electrical load, fuel heating and wear on the secondary pump. The primary and secondary pump may be easily switched by swapping the control jumpers if you wish to balance out the run-time on the pumps. The DP harness comes with both control jumpers plugged in as shown in our ad. In addition to this the DP harness comes with a Weather-Pack connector so you can interface the secondary pump control to your aftermarket computer or any pull-to-ground signal.
Q2. Can other pumps be used in the DP sender as an option?
A2. Only Walbro 255LPH, Racetronix RXP340M and Aeromotive 11140 340LPH pumps will fit through the tank opening side-by-side. It is a VERY tight fit. The DW and Siemens will not fit!
Q3. Is the DP system E85 compatible?
A3. The Buick fuel system was never designed for use with E85. True E85 certified systems have their electrical connections fully isolated from the fuel and the internal pump components that come in contact with the fuel are made of special plastics and nickel. Some HP pump vendors are currently marketing their pumps as E85 compatible but there is just as much compatibility with their construction as there is to a Walbro 255. Customers have been running E85 with the Buick sender and Walbro 255 pumps but we cannot vouch for their longevity. If you use E85, you do so at your own risk. Racetronix RXP340M and Aeromotive 11140 pumps may be used with reduced life expectancy.
Q4. I have your D-I-Y DP kit on a factory sender and I would like to upgrade / replace the sender. Can I buy the sender with the required parts?
A4. If you have our DP D-I-Y kit and would like to buy the parts we can help you BUT we MUST KNOW which parts you purchased. Some customers bought our kit with the brass pump coupler or silver/red billet coupler. If you have the brass coupler you will need to purchase the billet unit. If you have the billet coupler and it is being used on the factory, sender you will require a larger outlet o-ring to be able to place it on the new Racetronix sender b/c the tube OD is much larger. The dual pump mount may be re-used. The bulkhead, in-tank and intermediate wiring have all been upgraded and come pre-installed on the SS sender. If you have your sales order or invoice number, please supply it along with your e-mail inquiry.
Q5. Can the single Racetronix Hotwire Harness be used to power the new DP system?
A5. No it cannot. The harness for the DP system is very different in almost all aspects.
Q6. Can I buy the entire DP system in a D-I-Y format?
A6. We are only selling a DP D-I-Y kit for the purpose of installing it on a factory GM sender. Our complete assembled and tested DP kit is not that much more than the D-I-Y kit so in effect the assembly, testing and sender are being included at a minimal price. We prefer to assemble all the DP systems here to rule out any problems and to ensure that every DP system that ships meets stringent performance specifications.
Q7. I already have some Walbro 255LPH pumps. Can I use them with your system?
A7. Only the GSS340M and GSS294M pumps can be used with our dual pump mount bracket. This bracket is designed to accommodate pumps with a machined 22mm centered inlet ONLY! The non 'M' version of the GSS340 supplied by other vendors will not work (this is for a mustang application). The GSS341, GSS342, F20000169 pumps will not work. Please note that you are responsible for any damage or lack of performance as a byproduct of installing your own pumps.
Q8. I have heard some bad things about Walbro pumps on this forum. Are there other options?
A8. This is old news. The pump in question was the F20000169. Racetronix never sold this with any of our Buick-specific kits. Racetronix has always bundled the GSS340M pumps with our kits so our customers did not have the multitude of problems people had to deal with YEARS ago. Racetronix is currently bundling the GSS294M with its single and dual kits. This pump has the same guts and spec as the GSS340M. Racetronix adjusts the pressure relief valve on the GSS294M to guarantee improved performance at elevated operating pressures.
Q9. I have a digital dash car. Do you have a sender for me?
A9. Yes, please select the digital dash level sender in the drop-down menu in our web store.
Q10. What size of fuel line do you recommend if I decide to upgrade?
A10. We recommend a Teflon braided -8 feed and a -6 return line. We do not recommend any type of rubber (braided or not) for use with modern-day fuels. These Teflon lines will be more than able to support the full performance of our DP system.
Q11. Where is the biggest restriction in the fuel system?
A11. The factory steel lines running up the front of the motor.
Q12. Is the factory filter able to flow enough for the DP system.
A12. A clean factory filter is more than adequate. We do not recommend most aftermarket cartridge paper filters or SS mesh filters. The idea here is to protect the motor.
Q13. Can I use a volt-booster with your system?
A13. Yes, increased system voltage benefits pump performance.
Q14. What brand of fuel pressure regulator do you recommend?
A14. Accufab
Q15. Where do I get support?
A15. Via our support forum 24/7. The web URL which explains how to register is listed in our sales orders, sales invoices and packing slips.
Q16. Do you offer a -10 / -8 outlet version of this sender?
A16. We do not offer a -10 / -8 outlet version. The -8 / -6 version is more than large enough to support the fuel volume two pumps provide. You can see the oultet comparisons here for a comparison:http://www.racetronix.com/images/Fuel_Pumps/Walbro_pump_head-a.jpg
The outlet tubes will not easily accept larger fittings. If your motor really needs -10 / -8 lines to support the HP it produces then perhaps a dedicated external fuel system is worth considering. We offer in-line Weldon gear and Walbro screw pumps in our web store.
Q-SPEC. What are the performance specs of the DP system?
A-SPECS:
These are the typical specs with 2 x Walbro 255LPH pumps:
500LPH @ 43.5PSI @ 13.5V @ 15.9A
425LPH @ 58.0PSI @ 13.5V @ 18.5A
625LPH @ 43.5PSI @ 16.0V @ 17.6A
577LPH @ 58.0PSI @ 16.0V @ 20.6A
345LPH @ 80.0PSI @ 13.5V @ 23.4A
432LPH @ 80.0PSI @ 16.0V @ 26.2A
These are the typical specs with 2 x 340LPH pumps (UPDATED 2/15/13):
680LPH @ 43.5psi @ 13.5v @ 22.5A
820LPH @ 43.5psi @ 16.0v @ 27.5A
635LPH @ 58.0psi @ 13.5v @ 24.5A
790LPH @ 58.0psi @ 16.0v @ 29.5A
550LPH @ 80.0psi @ 13.5v @ 28.0A
710LPH @ 80.0psi @ 16.0v @ 32.5A
Racetronix
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Q17. How much HP will this system support in a Turbo Buick? (Will it support my HP requirements?)
A17. Multiply your HP by 0.42 which will give you the required fuel in LPH with a 20% safety margin. You must consider the flow at your maximum boost pressure. For example, if you base fuel pressure is 43.5PSI and your your regulator increases 1LB of fuel pressure for every 1LB of boost and you run 20PSI of boost your maximum fuel pressure would be 63.5PSI. Using the flow data above, confirm that the DP system is able to provide the required flow at your maximum fuel pressure and voltage. This calculation does not factor restrictions in the fuel lines. Since the condition of each system tends to vary it is best to run a return flow test at max fuel pressure once the DP is installed to determine if upgrading the fuel lines is required.
A17. Multiply your HP by 0.42 which will give you the required fuel in LPH with a 20% safety margin. You must consider the flow at your maximum boost pressure. For example, if you base fuel pressure is 43.5PSI and your your regulator increases 1LB of fuel pressure for every 1LB of boost and you run 20PSI of boost your maximum fuel pressure would be 63.5PSI. Using the flow data above, confirm that the DP system is able to provide the required flow at your maximum fuel pressure and voltage. This calculation does not factor restrictions in the fuel lines. Since the condition of each system tends to vary it is best to run a return flow test at max fuel pressure once the DP is installed to determine if upgrading the fuel lines is required.
Racetronix
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For those who need a solution between a 255 and 500LPH+ we now offer this E85 option:
http://www.turbobuick.com/forums/threads/new-racetronix-416lph-e-85-pump-ss-sender-combo.386869/
Please post all questions and comments in the relevant thread above.
http://www.turbobuick.com/forums/threads/new-racetronix-416lph-e-85-pump-ss-sender-combo.386869/
Please post all questions and comments in the relevant thread above.
Racetronix
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Racetronix DP systems now feature our new RXP340M Turbine-Tech 340 L/Hr fuel pumps. New lower pricing on DP systems with 340 L/Hr pumps and AN option.
Racetronix
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New 680LPH DP Senders undergoing QC testing with new RXP340M pumps
Racetronix
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Filter flow / pressure drop tests with OE type filter
Filter flow / pressure drop tests with FRAM /WIX E-85 6-micron filter.
We are conducting these tests as part of our DP line+fitting kit development.
Filter flow / pressure drop tests with FRAM /WIX E-85 6-micron filter.
We are conducting these tests as part of our DP line+fitting kit development.
Racetronix
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The new purple pumpers 
Q. What are the performance specs of the DP system w/2x340LPH pumps?
A. These are the typical specs with 2 x 340LPH pumps (UPDATED 2/15/13):
680LPH @ 43.5psi @ 13.5v @ 22.5A
820LPH @ 43.5psi @ 16.0v @ 27.5A
635LPH @ 58.0psi @ 13.5v @ 24.5A
790LPH @ 58.0psi @ 16.0v @ 29.5A
550LPH @ 80.0psi @ 13.5v @ 28.0A
710LPH @ 80.0psi @ 16.0v @ 32.5A
Q. What are the performance specs of the DP system w/2x340LPH pumps?
A. These are the typical specs with 2 x 340LPH pumps (UPDATED 2/15/13):
680LPH @ 43.5psi @ 13.5v @ 22.5A
820LPH @ 43.5psi @ 16.0v @ 27.5A
635LPH @ 58.0psi @ 13.5v @ 24.5A
790LPH @ 58.0psi @ 16.0v @ 29.5A
550LPH @ 80.0psi @ 13.5v @ 28.0A
710LPH @ 80.0psi @ 16.0v @ 32.5A
Racetronix
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We have separated / moved our dual 680LPH fuel pump system to a separate item in our web store to avoid some of the confusion with our previous listing:
It is currently on sale.
http://www.racetronix.biz/customkititems.asp?kc=DPFS-G7680AN&eq=
These are the typical specs with 2 x 340LPH pumps:
680LPH @ 43.5psi @ 13.5v @ 22.5A
820LPH @ 43.5psi @ 16.0v @ 27.5A
635LPH @ 58.0psi @ 13.5v @ 24.5A
790LPH @ 58.0psi @ 16.0v @ 29.5A
550LPH @ 80.0psi @ 13.5v @ 28.0A
710LPH @ 80.0psi @ 16.0v @ 32.5A
.
.
It is currently on sale.
http://www.racetronix.biz/customkititems.asp?kc=DPFS-G7680AN&eq=
These are the typical specs with 2 x 340LPH pumps:
680LPH @ 43.5psi @ 13.5v @ 22.5A
820LPH @ 43.5psi @ 16.0v @ 27.5A
635LPH @ 58.0psi @ 13.5v @ 24.5A
790LPH @ 58.0psi @ 16.0v @ 29.5A
550LPH @ 80.0psi @ 13.5v @ 28.0A
710LPH @ 80.0psi @ 16.0v @ 32.5A
.
.
(click image to enlarge)
Racetronix
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Just a quick update. We have all the lines fabricated and being installed this week.
Flow testing will be done this weekend.
HOPEFULLY we will have line kits available late next week...
Flow testing will be done this weekend.
HOPEFULLY we will have line kits available late next week...
Just a quick update. We have all the lines fabricated and being installed this week.
Flow testing will be done this weekend.
HOPEFULLY we will have line kits available late next week...
Any update?
Racetronix
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- Oct 1, 2001
- Messages
- 1,590
We are working on two systems.
One system will offer Goodridge 825-series Kevlar/Teflon hose. The three lengths of hose along with crimped fittings weighs ONLY 3.5LBS. This kit will have radius fittings as well as some in-house custom machined fittings to interface to the factory rail and regulator.
The second system will use SS/Teflon hose along with some Fragola adapter fittings.
If 12 an lines for feed and 10am lines for return. Were used would a Hobbs switch be necessary for use with the double pumper ? Are all the supply an fittings not braced or welded on the backside like the return an fitting? If so what is the reason?
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