Fuel Pump Questions
#1
Fuel Pump Questions
Ok guys here is my delima, I am trying to finish up my engine build and het it installed. I have built a 6.0 and will be running TFS 235 heads with about 11:1 CR. Fast 102 with a 102 TB and a 100mm MAF and 60# injectors. I am hoping to be a little over 500hp. What size fuel pump and system to I need to be looking at to allow me to have the proper fuel pressure and flow? I have been looking at the Racetronix 135-RFPK-001 and adding the upgraded battery ground and booster and pump booster controller kit.
https://www.texas-speed.com/p-2358-r...ic-system.aspx
I am currently not running type of power adder. I may in the future though.
Is this system adequate or do I need to be looking at something else totally. Also I have heard the with some aftermarket fuel pumps the fuel bucket need to be modified. Will this require any modification?
https://www.texas-speed.com/p-2358-r...ic-system.aspx
I am currently not running type of power adder. I may in the future though.
Is this system adequate or do I need to be looking at something else totally. Also I have heard the with some aftermarket fuel pumps the fuel bucket need to be modified. Will this require any modification?
#2
The Racetronix is a direct replacement requiring no modification to the bucket.
Fuel Pump Assembly FPA-001A Good to 600 HP.
Scroll to bottom of page.
http://www.racetronix.biz/items.asp?...atus=0&Tp=&Bc=
Fuel Pump Assembly FPA-001A Good to 600 HP.
Scroll to bottom of page.
http://www.racetronix.biz/items.asp?...atus=0&Tp=&Bc=
Last edited by Ollie8974; 03-09-2014 at 07:07 AM.
#4
Im also trying to figure this out.
From those links it says to take 60lb * .80 (duty)=46/.5=96HP * 8 injectors gets you HP good to 768 with 60lb injectors?
Can anyone confirm I'm doing this right and would 42Lb injectors work just fine for a 500HP motor as he said? 42*.80=33.6/.5=67.2*8=537.6 HP?
No clue on fuel pump as Im also looking for answers for something like your build. Why did you go with 60# injectors?
From those links it says to take 60lb * .80 (duty)=46/.5=96HP * 8 injectors gets you HP good to 768 with 60lb injectors?
Can anyone confirm I'm doing this right and would 42Lb injectors work just fine for a 500HP motor as he said? 42*.80=33.6/.5=67.2*8=537.6 HP?
No clue on fuel pump as Im also looking for answers for something like your build. Why did you go with 60# injectors?
Last edited by NuckenFuts; 03-09-2014 at 12:01 PM.
#5
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There is nothing wrong with going over 80% IDC. I've seen stock vehicles exceed that number. I've hit 98-100% IDC in my cam/head 2001 ZO6 for years without any issues. Now I have 36 lb/hr Fast injectors (41 lbs/hr @58psi) in my 418 stroker that hits 85% IDC. And my stock fuel pump maintains 56 psi @7000 rpm at WOT.
The 80% IDC rule is published by injector suppliers to sell more injectors to people that don't need larger injectors. You don't make more power with larger injectors if your IDC is <100%.
Russ Kemp
The 80% IDC rule is published by injector suppliers to sell more injectors to people that don't need larger injectors. You don't make more power with larger injectors if your IDC is <100%.
Russ Kemp
#6
The Racetronix is a direct replacement requiring no modification to the bucket.
Fuel Pump Assembly FPA-001A Good to 600 HP.
Scroll to bottom of page.
http://www.racetronix.biz/items.asp?...atus=0&Tp=&Bc=
Fuel Pump Assembly FPA-001A Good to 600 HP.
Scroll to bottom of page.
http://www.racetronix.biz/items.asp?...atus=0&Tp=&Bc=
Im also trying to figure this out.
From those links it says to take 60lb * .80 (duty)=46/.5=96HP * 8 injectors gets you HP good to 768 with 60lb injectors?
Can anyone confirm I'm doing this right and would 42Lb injectors work just fine for a 500HP motor as he said? 42*.80=33.6/.5=67.2*8=537.6 HP?
No clue on fuel pump as Im also looking for answers for something like your build. Why did you go with 60# injectors?
From those links it says to take 60lb * .80 (duty)=46/.5=96HP * 8 injectors gets you HP good to 768 with 60lb injectors?
Can anyone confirm I'm doing this right and would 42Lb injectors work just fine for a 500HP motor as he said? 42*.80=33.6/.5=67.2*8=537.6 HP?
No clue on fuel pump as Im also looking for answers for something like your build. Why did you go with 60# injectors?
There is nothing wrong with going over 80% IDC. I've seen stock vehicles exceed that number. I've hit 98-100% IDC in my cam/head 2001 ZO6 for years without any issues. Now I have 36 lb/hr Fast injectors (41 lbs/hr @58psi) in my 418 stroker that hits 85% IDC. And my stock fuel pump maintains 56 psi @7000 rpm at WOT.
The 80% IDC rule is published by injector suppliers to sell more injectors to people that don't need larger injectors. You don't make more power with larger injectors if your IDC is <100%.
Russ Kemp
The 80% IDC rule is published by injector suppliers to sell more injectors to people that don't need larger injectors. You don't make more power with larger injectors if your IDC is <100%.
Russ Kemp
#7
TECH Resident
iTrader: (1)
Before spending money on a fuel pump you might not need, plus the effort to drop the tank to swap the pump, I would tape a fuel pressure gauge to the windshield. Then go WOT til redline, if the pressure drops below~55 psi, you need a higher output pump. Make sure to replace the fuel filter first.
That Racetronix pump kit is more than enough, and is probably not needed for your power level. I still have the OEM pump in my ZO6.
Russ Kemp
That Racetronix pump kit is more than enough, and is probably not needed for your power level. I still have the OEM pump in my ZO6.
Russ Kemp
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#8
Before spending money on a fuel pump you might not need, plus the effort to drop the tank to swap the pump, I would tape a fuel pressure gauge to the windshield. Then go WOT til redline, if the pressure drops below~55 psi, you need a higher output pump. Make sure to replace the fuel filter first.
That Racetronix pump kit is more than enough, and is probably not needed for your power level. I still have the OEM pump in my ZO6.
Russ Kemp
That Racetronix pump kit is more than enough, and is probably not needed for your power level. I still have the OEM pump in my ZO6.
Russ Kemp
#10
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if you have a dirty injector / old injector and you stay in the 95~100% duty cycle range you are risking losing an engine. I have witnessed this twice so far. We have done all the troubleshooting down to every component, and we go back and look at the data log and see 100%+ duty cycle and check everything, and it came down to the injectors.
Why risk killing an engine with a not so expensive upgrade? I just don't get it. Either upgrade or make damn sure your fueling system has new filters & injectors are clean.
a single 255 pump will net you enough fuel supply for 8 x 51# injectors, if your engine requires more fuel than this, you will start noticing a drop in fuel pressure with those 60# injectors.
On a Naturally aspirated engine 675HP will require SMALLER injectors than a boosted application. That is why the 42# seems to be the number you come up with.
If you go boosted, those injectors (60#) will carry you depending on how much boost you run & power you make. Those injectors are likely rated 60# @ 43.5psi which at our 58psi rail pressure are actually 69# injectors.
boost a pump...don't bother. Seen many failures/issues with these over time.