[BAzombie]

Ok guys I need some help for my winter build. I have about 90% of my build figured out. What I need help with is the fuel system.

I going to run a 5.3L block with a Logan intake and stage 3 N/A cams from MHS. I plan on turning 7k RPM and I'm hoping to see between 360 & 380 HP to the tires.

I'm thinking either 39# or 42# injectors. I would hate to go with 30#ers and be pushing the duty cycle on them. What I have no clue on is what I should use for a fuel pump.

Anyone have any suggestions ?

[04 orange cobra]

I'd check with who ever is going to tune the car....

[BAzombie]

Thanks Rob, that would be Pete.

I don't know shit about fuel requirements. Just what I've read comparing fuel systems with HP output.


Only bad part of my plans is that I dying for winter to hurry up and get here.

[SaratogaSaleen]

LOL .... whoaaa, slow down there ... it's only the 1st full day of summer !!!

[BAzombie]

^


I feel like a kid waiting for Santa on a Christmas Eve that last's for 7 months.

[SaratogaSaleen]

yea ... i get "antsy" too come october / november ... planning out what mods i want to do over the winter

[FrostByte]

Originally Posted by BAzombie

Thanks Rob, that would be Pete.

I don't know shit about fuel requirements. Just what I've read comparing fuel systems with HP output.


Only bad part of my plans is that I dying for winter to hurry up and get here.

DONT WISH YOUR LIFE AWAY FOR ANYTHING KID!!!!! Enjoy the summer, we never know how many we more we have.

[modularmustang]

you should be fine with 39# injectors, 30# would be pushing the limit on their duty cycle (93% assuming 380rwhp). You should Try to get as small of injector as you can so you can more easily tune at idle and low rpm.

You should be at about 85% duty cycle to be safe. So with stock fuel pressure of ~39psi you'll need ~33lb injectors.

a 255lph walbro should do the trick for you too

edit:
here is an injector sizing site i have saved in my favorites:
http://www.gtsparkplugs.com/InjectorSizeCalc.html

[On Edge]

Originally Posted by modularmustang

you should be fine with 39# injectors, 30# would be pushing the limit on their duty cycle (93% assuming 380rwhp). You should Try to get as small of injector as you can so you can more easily tune at idle and low rpm.

You should be at about 85% duty cycle to be safe. So with stock fuel pressure of ~39psi you'll need ~33lb injectors.

a 255lph walbro should do the trick for you too

edit:
here is an injector sizing site i have saved in my favorites:
Injector Size Calculator

great info....just trying to understand...if you are trying to get as small of an injector....would this example use 33 lbers or 39 lbers. because you say you would need 33s, but 39s would be fine. so 39s arent too big? just wondering and learning. thanks.

[joswo1980]

Go with 39# unless u can find some 42# green top lighting injectors with the 39#s ul need to also buy adapters but flow just as good as 42u, im running a division x stryker 340lp pump works great im at 83 duty cycle at at 416 rwhp on a boosted mustang, should be more than what u need for a all motor build

[On Edge]

Originally Posted by joswo1980

Go with 39# unless u can find some 42# green top lighting injectors with the 39#s ul need to also buy adapters but flow just as good as 42u, im running a division x stryker 340lp pump works great im at 83 duty cycle at at 416 rwhp on a boosted mustang, should be more than what u need for a all motor build

how much was that division x stryker 340, and where do you buy them from ? thanks.

[joswo1980]

Originally Posted by On Edge

how much was that division x stryker 340, and where do you buy them from ? thanks.

The pump is 150 from lethal performance, u will have to do a ppv delete and drill holes in the bottom of basket or ul pump will suck the basket dry

[On Edge]

Originally Posted by joswo1980

The pump is 150 from lethal performance, u will have to do a ppv delete and drill holes in the bottom of basket or ul pump will suck the basket dry

what is a ppv delete ?? does the stryker fit right into the old spot ?

[joswo1980]

The pprv is a delete u do in order to free up duty cycle cause its a major fuel restriction, all u gotta do is, when u pull ur housing out ul c 2 accordin style house and a small housing on top wit 2 tiny screws, ur gonna take them off and throw them right out, then ur gonna buy 1ft of gates 5/16 submerseable fuel line (no other lines will work, the gas will eat it ) ur gonna hook that hose straight from pump to ur fuel hat, makeing sure ot dosent kink, i used a brass elbow were it bends so i know it wont kink but u can also use a nylon elbow, but be4 that ur also gotta drill about 4-5 5/16 holes in bottom of basket

[joswo1980]

Yes its a direct fit just need to reuse ur old fuel pump sock or buy one like it, some ppl had to widen out top of basket were fuel pump comes up but i didnt have to