DO I NEED AN ADJUSTABLE FPR??
#1
DO I NEED AN ADJUSTABLE FPR??
Yes I've searched. Yes if I get one it will be AEM
So I have a turbo b18c5, it has a walbro 255, Delphi 525cc injectors,stock fuel rail. I'll be somewhere around 400hp
Now I read you need one on anything bigger then a 190lph pump to keep your pressure lower but I have a feeling my injectors are going to be pretty much maxed, so the psi might need to be higher anyways?
TIA
So I have a turbo b18c5, it has a walbro 255, Delphi 525cc injectors,stock fuel rail. I'll be somewhere around 400hp
Now I read you need one on anything bigger then a 190lph pump to keep your pressure lower but I have a feeling my injectors are going to be pretty much maxed, so the psi might need to be higher anyways?
TIA
#3
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Re: DO I NEED AN ADJUSTABLE FPR??
No, you need to take the car to a tuner. 525CC injectors should be able to flow enough to handle up to 450whp, and any competent tuner can set it all up to work correctly for you. Don't waste your money on an FPR.
#6
Re: DO I NEED AN ADJUSTABLE FPR??
I would get one. It keeps a linear fuel pressure curve 100% reliably which means no random funny business down the road. For 100$ now you could save your whole setup someday.
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Re: DO I NEED AN ADJUSTABLE FPR??
Ask your tuner. I've been running DSM 480's on my turbo setup, 255, and completely stock everything else with zero problems. I doubt you'll need one.
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Re: DO I NEED AN ADJUSTABLE FPR??
Currently, a hair under 230. I've been talking to my tuner about my current build-in-progress, and he agreed that I won't need an adjustable FPR for the 500WHP I'll be making on the street, or the 700 goal on my track tune.
Is it useful? Hell yes it is. Is it needed? No.
Is it useful? Hell yes it is. Is it needed? No.
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Re: DO I NEED AN ADJUSTABLE FPR??
Your definitely gonna need bigger injectors or you are gonna have to crank up the fuel pressure for 500 whp. It's recomended to upgrade the fuel rail at that level. You'll be seeing over 100psi of fuel pressure with those injectors.
500hp x .60 B.S.F.C. = 300
4 inj. x .80 duty cycle = 3.2
300 / 3.2 = 94
94 x 10.50 = 987cc
500hp x .60 B.S.F.C. = 300
4 inj. x .80 duty cycle = 3.2
300 / 3.2 = 94
94 x 10.50 = 987cc
#12
Re: DO I NEED AN ADJUSTABLE FPR??
I said around 400hp my injectors should be good might have to turn the psi some though depending on when I want to stop making more power, most likely like I said it will be once I hit 400 hp cuz it will be a dd. I'm not going to upgrade the fuel rail I'm just wondering if I'm going to need the fpr
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Re: DO I NEED AN ADJUSTABLE FPR??
Get one. Get 750cc injectors for room to grow. Better to have injectors that can take whatever your throw at it and not be anywhere near full duty. But i'd keep it to 300hp on the street. 350 max.
#16
Re: DO I NEED AN ADJUSTABLE FPR??
And my real goal is high 300s low 400s. I didn't put all this money into this build to only make 300hp which we all know coulve been done stock.
So again guys, I will need it for sure correct?
Thanks again for the response
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Re: DO I NEED AN ADJUSTABLE FPR??
500 crank hp x .15 = 75
500 - 75 = 425whp roughly
400 crank hp x .15 = 60
400 - 60 = 340whp roughly
300 crank hp x .15 = 45
300 - 45 = 255whp roughly
500 crank hp x .60 B.S.F.C. = 300
4 inj. x .80 duty cycle = 3.2
300 / 3.2 = 94
94 x 10.50 = 987cc
500 - 75 = 425whp roughly
400 crank hp x .15 = 60
400 - 60 = 340whp roughly
300 crank hp x .15 = 45
300 - 45 = 255whp roughly
500 crank hp x .60 B.S.F.C. = 300
4 inj. x .80 duty cycle = 3.2
300 / 3.2 = 94
94 x 10.50 = 987cc
#18
Re: DO I NEED AN ADJUSTABLE FPR??
OEM fuel rail, FPR and lines are good for up 500whp with needing to upgrade. So the stock FPR will be fine no need to upgrade it.
ID 1000cc injectors for the win, all the injector you will need unless going to E85 or super crazy power.
ID 1000cc injectors for the win, all the injector you will need unless going to E85 or super crazy power.
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Re: DO I NEED AN ADJUSTABLE FPR??
OEM fuel rail, FPR and lines are good for up 500whp with needing to upgrade. So the stock FPR will be fine no need to upgrade it.
ID 1000cc injectors for the win, all the injector you will need unless going to E85 or super crazy power.
ID 1000cc injectors for the win, all the injector you will need unless going to E85 or super crazy power.
43.5psi fuel pressure 1:1
fuel flow needed 1000cc/min
injector size 1000cc/min
160psi fuel pressure 1:1
fuel flow needed 1000cc/min
injector size 525cc/min
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