Turbo Fueling System
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From: Jonesboro, Ga
Turbo Fueling System Whats up guys, my goal is to have a fuel system to support 800rwhp, or enough power to support a 9.0 @ 150 pass (long term goal) in a 3400-3500# car. Currently I'm looking at the billet fuel rails speed inc is having a group purchase on right now. I have (1) holley 255 lph pump in tank right now, and I'm going to order another one and run (2) holley 255 lph pumps with a hobbs switch.
I have done some searching and I'm not quite sure what injectors I need. I was looking at the RC Engineering 75# on forcedinductions.com. They are under $800. However, there are other injectors of the same size for several hundred less. Will these cheaper injectors work with my PCM or will they require some sort of controller box or a standalone? I'm not 100% sure what would make such a big difference in the price of the injectors. Are the RC Engineerings worth the cash? I noticed the cheaper injectors are low impedance. Which are compatible and what will I need to make this happen.
Also, would 75# be sufficient for the level of power I'm hoping to achieve? I was looking at the motron 60# injectors, but was afraid they probably wouldn't be up to snuff for 800rwhp especially when I'm hoping to make that through a power robbing th400 and 9 inch.
FWIW: For my power level I am not against using alcohol/methanol injection.
Mods feel free to move this to the fueling section, as I just realized I didn't post it in there.
Thanks,
Josh
I have done some searching and I'm not quite sure what injectors I need. I was looking at the RC Engineering 75# on forcedinductions.com. They are under $800. However, there are other injectors of the same size for several hundred less. Will these cheaper injectors work with my PCM or will they require some sort of controller box or a standalone? I'm not 100% sure what would make such a big difference in the price of the injectors. Are the RC Engineerings worth the cash? I noticed the cheaper injectors are low impedance. Which are compatible and what will I need to make this happen.
Also, would 75# be sufficient for the level of power I'm hoping to achieve? I was looking at the motron 60# injectors, but was afraid they probably wouldn't be up to snuff for 800rwhp especially when I'm hoping to make that through a power robbing th400 and 9 inch.
FWIW: For my power level I am not against using alcohol/methanol injection.
Mods feel free to move this to the fueling section, as I just realized I didn't post it in there.
Thanks,
Josh
Originally Posted by distortion_69
What are the advantages of running high impedance injectors that would make them so much more expensive?
Thanks,
Josh
Thanks,
Josh
I went with Racetronix 95LB/HR injectors on my setup, they are low-z but bigstuff3 will drive them with no additional hardware.
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From: Jonesboro, Ga
Will the injectors I'm looking at (RC Engineering 75LB/HR) produce the power I'm looking for without getting into the whole bigstuff3, etc? Also, out of curiosity what does bigstuff 3 cost, and what are other advantages besides not needing a driver box and cheaper injectors.
Thanks,
Josh
Thanks,
Josh
That box costs about 2500, you can get other systems for around 1500 though, and they are complete standalone computers (my car has no stock computer in it, at all).
Anyway, the 75LB/HR should be around 80% duty cycle at around 800WHP from my calculations, but I am no expert.
Anyway, the 75LB/HR should be around 80% duty cycle at around 800WHP from my calculations, but I am no expert.
Found these formulas, not sure how to figure out BSFC but they say it should be around 0.65 for a F/I motor and 0.5 for N/A
Fuel injectors max HP (lb/hr)* =
Injector flow rate x Number of injectors x 0.8
BSFC
Or
Fuel injectors max HP (cc/min)* =
Injector flow rate x Number of injectors x 0.8
BSFC x 10.5
Fuel injectors max HP (lb/hr)* =
Injector flow rate x Number of injectors x 0.8
BSFC
Or
Fuel injectors max HP (cc/min)* =
Injector flow rate x Number of injectors x 0.8
BSFC x 10.5
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Originally Posted by distortion_69
Whats up guys, my goal is to have a fuel system to support 800rwhp, or enough power to support a 9.0 @ 150 pass (long term goal) in a 3400-3500# car. Currently I'm looking at the billet fuel rails speed inc is having a group purchase on right now. I have (1) holley 255 lph pump in tank right now, and I'm going to order another one and run (2) holley 255 lph pumps with a hobbs switch.
I have done some searching and I'm not quite sure what injectors I need. I was looking at the RC Engineering 75# on forcedinductions.com. They are under $800. However, there are other injectors of the same size for several hundred less. Will these cheaper injectors work with my PCM or will they require some sort of controller box or a standalone? I'm not 100% sure what would make such a big difference in the price of the injectors. Are the RC Engineerings worth the cash? I noticed the cheaper injectors are low impedance. Which are compatible and what will I need to make this happen.
Also, would 75# be sufficient for the level of power I'm hoping to achieve? I was looking at the motron 60# injectors, but was afraid they probably wouldn't be up to snuff for 800rwhp especially when I'm hoping to make that through a power robbing th400 and 9 inch.
FWIW: For my power level I am not against using alcohol/methanol injection.
Mods feel free to move this to the fueling section, as I just realized I didn't post it in there.
Thanks,
Josh
I have done some searching and I'm not quite sure what injectors I need. I was looking at the RC Engineering 75# on forcedinductions.com. They are under $800. However, there are other injectors of the same size for several hundred less. Will these cheaper injectors work with my PCM or will they require some sort of controller box or a standalone? I'm not 100% sure what would make such a big difference in the price of the injectors. Are the RC Engineerings worth the cash? I noticed the cheaper injectors are low impedance. Which are compatible and what will I need to make this happen.
Also, would 75# be sufficient for the level of power I'm hoping to achieve? I was looking at the motron 60# injectors, but was afraid they probably wouldn't be up to snuff for 800rwhp especially when I'm hoping to make that through a power robbing th400 and 9 inch.
FWIW: For my power level I am not against using alcohol/methanol injection.
Mods feel free to move this to the fueling section, as I just realized I didn't post it in there.
Thanks,
Josh
Make sure you do your Fp reg. up front by the rails and get a tuner that tune the car....... the stock PCM is going to have fun with your setup if your going turbo............
Thatsthe main reason i went with BS3 also...... Ask Allen about how Weather from day to day will affect how the car drives......... if you dont like tuning the car every time you drive it go with a standalone with that much power.Kyle
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FormerVendor
Joined: Dec 2001
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From: WWW.SPEEDINC.COM
I think dual walbros are a good choice. I've been running the same ones for years with no problems.
Yes, if one doesn't work you will go lean. But if your single ginormous pump starts failing it will go lean as well.
I think if the quality of the work/wiring done is good, than a dual pump system will be reliable.
Yes, if one doesn't work you will go lean. But if your single ginormous pump starts failing it will go lean as well.
I think if the quality of the work/wiring done is good, than a dual pump system will be reliable.
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From: Jonesboro, Ga
Is there any sort of safety device in a standalone to pull timing or cut ignition in the event of an extreme lean condition such as the failure of one pump? What would be a safer choice rather than 2 pumps in the event one fails. FWIW: This car will be driven less than a 2500 miles on the street per year. My only goal is to be able to drive the car to the track if necessary, and to the local cruise spot about 10 miles up the highway. I could run lower boost settings for this. Could I avoid the FP reg if I used 2 higher volume pumps such as 340's. One goal with the car is to keep the noise down. The quieter the fuel pump the better. The car will be on quiet exhaust for the street and a cutout for the track. So anything thats at least reasonably quiet (can't hear over engine, or stereo).
Peace,
Josh
Peace,
Josh
Originally Posted by distortion_69
. Could I avoid the FP reg if I used 2 higher volume pumps such as 340's.
Im sure if i missed anything INTMD8 will post it.
Kyle
im not sure if the 75 lb'ers would be enough for your long term goal of 9.0@150.
if it was me id step up to a 96'lb injector, standalone BS3 would be good, but HPT will some have a 3bar map sensor SD tuning capibility, so you would just need a driver box for your low impedance injectors.
if it was me id step up to a 96'lb injector, standalone BS3 would be good, but HPT will some have a 3bar map sensor SD tuning capibility, so you would just need a driver box for your low impedance injectors.
I ruin the end of films...
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From: Taking back some video tapes
Originally Posted by Boostaholic
Found these formulas, not sure how to figure out BSFC but they say it should be around 0.65 for a F/I motor and 0.5 for N/A
Fuel injectors max HP (lb/hr)* =
Injector flow rate x Number of injectors x 0.8
BSFC
Or
Fuel injectors max HP (cc/min)* =
Injector flow rate x Number of injectors x 0.8
BSFC x 10.5
Fuel injectors max HP (lb/hr)* =
Injector flow rate x Number of injectors x 0.8
BSFC
Or
Fuel injectors max HP (cc/min)* =
Injector flow rate x Number of injectors x 0.8
BSFC x 10.5
.45 for N/A motors
.55 for supercharged
.65 for turbo'
The 0.8 is the duty cycle which can be played with a little, although 80% is what's considered "safe".
Also, the King Sumo pumps from Magnaflow are scrap. I'm using an A-motive 10 micron filter, Weldon 2035 pump, SX 100 micron filter, Weldon voltage regulator, Weldon fuel regulator and 72# Siemens injectors on my turbo car. Even at higher f.p. the 72s aren't enuff.
My setup ran me an easy 2Gs. 
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Joined: Nov 2001
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From: Las Cruces, NM
Originally Posted by NA$TY-TA
and to get that much fuel out of those pumps you will have to use a rate rise FP reg and set your base at 60 psi and climb from there..... ask Mighty mouse.... he had to run 80 psi of FP to get his to work
Gary
Originally Posted by red ws6 99
That actually just the opposite of what you want to do to a pump. If you look at any of the pump curves the lower the outlet pressure the higher the volume. So you increase pressure you get less flow from the pump but more flow from the injectors.
Gary
Gary
Yes i know that... thats why i said dont do it.......... im going with 96# injectors and BS3........ with twin Bousch 420L external pumps i should have plenty of fuel.
Kyle