79lb racetronics
79lb racetronics i am considering buying these for my set up. anyone running them? do you like em? will be running 12-14 lbs boost with dual walbros and boost a pump on stock lines and rails
.. i was figuring it will leave a little room for growth. i would go bigger but havent found any high imp that are bigger. anyone know of any? if so how about a link. also whats the best price anyone has seen on the 79's
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guys.... use www.rceng.com/technical I do have a sticky in this main page under fuel and injection.
you can calculate all your numbers there, if you have questions, PM me
you can calculate all your numbers there, if you have questions, PM me
Former Vendor
Joined: Mar 2009
Posts: 39
Likes: 0
Just some advice on disc injectors.
They have some great flow advantages, quick response, good spray pattern, etc. We also sell disc injectors. The one thing they do NOT DO is handle additional uncompensated fuel pressure increases (ie, static increases and not an increase that is balanced by a rise in manifold pressure). You can jack the pressure up on pintle injectors like the Siemens 60lb or 80lb injectors quite high and see an increase in flow. If you try to do this with a disc injector, it may become inconsistent and with enough pressure will eventually fail to open possibly leading to lean conditions and eventually engine armageddon. So, DO NOT EXCEED THE DESIGN PRESSURE ON DISC INJECTORS! To do so is to risk your engine.
Here is a great simple pdf explaining the design differences:
http://www.bmotorsports.com/download...tor_design.pdf
Here is a great example video put together by another sponsor on this forum. Normally a competitor of ours, we are happy he put this video together because it is quick and useful:
http://www.youtube.com/watch?v=7oTirEZNRw8
I should note that in the above video, the newer Lucas disc design still flows well at higher pressures and this is the same style disc injector we sell whereas the older Multecs completely fail at higher pressures. Regardless of the design however, we still recommend against raising the static fuel pressure of any disc injector to increase fuel flow.
They have some great flow advantages, quick response, good spray pattern, etc. We also sell disc injectors. The one thing they do NOT DO is handle additional uncompensated fuel pressure increases (ie, static increases and not an increase that is balanced by a rise in manifold pressure). You can jack the pressure up on pintle injectors like the Siemens 60lb or 80lb injectors quite high and see an increase in flow. If you try to do this with a disc injector, it may become inconsistent and with enough pressure will eventually fail to open possibly leading to lean conditions and eventually engine armageddon. So, DO NOT EXCEED THE DESIGN PRESSURE ON DISC INJECTORS! To do so is to risk your engine.
Here is a great simple pdf explaining the design differences:
http://www.bmotorsports.com/download...tor_design.pdf
Here is a great example video put together by another sponsor on this forum. Normally a competitor of ours, we are happy he put this video together because it is quick and useful:
http://www.youtube.com/watch?v=7oTirEZNRw8
I should note that in the above video, the newer Lucas disc design still flows well at higher pressures and this is the same style disc injector we sell whereas the older Multecs completely fail at higher pressures. Regardless of the design however, we still recommend against raising the static fuel pressure of any disc injector to increase fuel flow.
Last edited by Bmotorsports; Apr 18, 2009 at 09:15 AM.
TECH Resident
Joined: Dec 2008
Posts: 995
Likes: 0
Just some advice on disc injectors.
They have some great flow advantages, quick response, good spray pattern, etc. We also sell disc injectors. The one thing they do NOT DO is handle additional uncompensated fuel pressure increases (ie, static increases and not an increase that is balanced by a rise in manifold pressure). You can jack the pressure up on pintle injectors like the Siemens 60lb or 80lb injectors quite high and see an increase in flow. If you try to do this with a disc injector, it may become inconsistent and with enough pressure will eventually fail to open possibly leading to lean conditions and eventually engine armageddon. So, DO NOT EXCEED THE DESIGN PRESSURE ON DISC INJECTORS! To do so is to risk your engine.
Here is a great simple pdf explaining the design differences:
http://www.bmotorsports.com/download...tor_design.pdf
Here is a great example video put together by another sponsor on this forum. Normally a competitor of ours, we are happy he put this video together because it is quick and useful:
http://www.youtube.com/watch?v=7oTirEZNRw8
I should note that in the above video, the newer Lucas disc design still flows well at higher pressures and this is the same style disc injector we sell whereas the older Multecs completely fail at higher pressures. Regardless of the design however, we still recommend against raising the static fuel pressure of any disc injector to increase fuel flow.
They have some great flow advantages, quick response, good spray pattern, etc. We also sell disc injectors. The one thing they do NOT DO is handle additional uncompensated fuel pressure increases (ie, static increases and not an increase that is balanced by a rise in manifold pressure). You can jack the pressure up on pintle injectors like the Siemens 60lb or 80lb injectors quite high and see an increase in flow. If you try to do this with a disc injector, it may become inconsistent and with enough pressure will eventually fail to open possibly leading to lean conditions and eventually engine armageddon. So, DO NOT EXCEED THE DESIGN PRESSURE ON DISC INJECTORS! To do so is to risk your engine.
Here is a great simple pdf explaining the design differences:
http://www.bmotorsports.com/download...tor_design.pdf
Here is a great example video put together by another sponsor on this forum. Normally a competitor of ours, we are happy he put this video together because it is quick and useful:
http://www.youtube.com/watch?v=7oTirEZNRw8
I should note that in the above video, the newer Lucas disc design still flows well at higher pressures and this is the same style disc injector we sell whereas the older Multecs completely fail at higher pressures. Regardless of the design however, we still recommend against raising the static fuel pressure of any disc injector to increase fuel flow.
Are you suggesting to run them at rated pressure of 43.5 psig. LS1 FP is 58 psig. Is running LS1 FP risky with those 79Ib racetronix injectors?
http://www.racetronix.com/01D129xFM.html
Last edited by Denali08; Apr 18, 2009 at 10:16 AM.
Former Vendor
Joined: Mar 2009
Posts: 39
Likes: 0
Thanks for informing.
Are you suggesting to run them at rated pressure of 43.5 psig. LS1 FP is 58 psig. Is running LS1 FP risky with those 79Ib racetronix injectors?
http://www.racetronix.com/01D129xFM.html
Are you suggesting to run them at rated pressure of 43.5 psig. LS1 FP is 58 psig. Is running LS1 FP risky with those 79Ib racetronix injectors?
http://www.racetronix.com/01D129xFM.html
At 80lb/hr I would recommend these Siemens pintle injectors before the Delphi disc injectors:
http://www.bmotorsports.com/shop/adv...&keywords=80lb
Last edited by Bmotorsports; Apr 19, 2009 at 08:18 PM.
No I am not. The 120lb/hr and 79lb/hr new Lucas / Delphi design should work well at 58psi static pressure. To be clear the injectors showcased in the video, from left to right, are a Bosch pintle design, the new Lucas / Delphi disc design (ie the 79lb/hr and 120lb/hr Delphi injectors), and finally the older Delphi disc design. The only design to fail explicitly in this video was the older Delphi design where the design used in the 79lb/hr injectors ramped through all pressure ranges successfully. My only point here is not to drive up the pressure on the older disc designs and I generally recommend not ramping the static pressure way up on ANY disc designs to the high pressures (ie 80psi+) some people like to run on pintle designs to increase their flow rates.
At 80lb/hr I would recommend these Siemens pintle injectors before the Delphi disc injectors:
http://www.bmotorsports.com/shop/adv...&keywords=80lb
At 80lb/hr I would recommend these Siemens pintle injectors before the Delphi disc injectors:
http://www.bmotorsports.com/shop/adv...&keywords=80lb
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
Thanks for informing.
Are you suggesting to run them at rated pressure of 43.5 psig. LS1 FP is 58 psig. Is running LS1 FP risky with those 79Ib racetronix injectors?
http://www.racetronix.com/01D129xFM.html
Are you suggesting to run them at rated pressure of 43.5 psig. LS1 FP is 58 psig. Is running LS1 FP risky with those 79Ib racetronix injectors?
http://www.racetronix.com/01D129xFM.html
The Siemens 80's are a faster injector and can operate at a slightly higher pressure. Most people will never be running at fuel pressures where this becomes an issue.
The Siemens 80's have a narrow pencil-stream spray pattern where the SMP 79's have a tri-cone pattern. It would be best to check with your motor builder and/or tuner which injector is best for your intake system and which injector they have experience tuning.
The Siemens 80's can support upwards of 1000-1100 HP at LSX pressures assuming you are running a FMFPR system so that the FP tracks manifold pressure 1:1. This will also depend on your motor's BSFC and the A/F you feel safe running.
Siemens (now Continental) engineers do not classify the DEKA 4 injector family as being pintle-types.
There are some major advantages using low-impedance injectors with a peak / hold driver system but it does add to the cost.
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
There are no problems running these injectors at a LS1 base pressure of 58PSI. There are some older versions of this injector floating around / being sold used with a part number of 01D077.. which are not recommended for LSX 4-bar applications. It would be best to buy a new 1% flow-matched set.
The Siemens 80's are a faster injector and can operate at a slightly higher pressure. Most people will never be running at fuel pressures where this becomes an issue.
The Siemens 80's have a narrow pencil-stream spray pattern where the SMP 79's have a tri-cone pattern. It would be best to check with your motor builder and/or tuner which injector is best for your intake system and which injector they have experience tuning.
The Siemens 80's can support upwards of 1000-1100 HP at LSX pressures assuming you are running a FMFPR system so that the FP tracks manifold pressure 1:1. This will also depend on your motor's BSFC and the A/F you feel safe running.
Siemens (now Continental) engineers do not classify the DEKA 4 injector family as being pintle-types.
There are some major advantages using low-impedance injectors with a peak / hold driver system but it does add to the cost.
The Siemens 80's are a faster injector and can operate at a slightly higher pressure. Most people will never be running at fuel pressures where this becomes an issue.
The Siemens 80's have a narrow pencil-stream spray pattern where the SMP 79's have a tri-cone pattern. It would be best to check with your motor builder and/or tuner which injector is best for your intake system and which injector they have experience tuning.
The Siemens 80's can support upwards of 1000-1100 HP at LSX pressures assuming you are running a FMFPR system so that the FP tracks manifold pressure 1:1. This will also depend on your motor's BSFC and the A/F you feel safe running.
Siemens (now Continental) engineers do not classify the DEKA 4 injector family as being pintle-types.
There are some major advantages using low-impedance injectors with a peak / hold driver system but it does add to the cost.
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
You had best get those drilled-out injectors checked before you use them.
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
Low impedance injectors are faster and much less effected by changes in battery voltage, temperature and fuel pressure. We have many customers who run our impedance converter system with 85, 95 and 120 lb injectors. Their motors run silky smooth and the mileage is quite respectable. Many tuners who have used our system are very surprised how well the motors dial in and how consistent they are.
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<