Fuel System: Go big or go home?

[87M-GTE]

Hey Guys,

I have almost all of the parts for my single turbo 1JZ project, I just have the fuel system to get before the swap. My goal for the car is to crack 600rwhp.

I am thinking PTE 1000cc, DM dual pump hanger, 2 walbros, and SS lines throughout.

Are there any benifits or problems I might run into with running too big of an injector?
Will the 1000cc's be too much of an overhead for this goal? I want to overkill the fuel system so-to-speak so that I don't have to worry about maxxing out my injectors.

Any tips or advice is appreciated!

Thanks guys

Sam

 

[aphxero]

850cc would be plenty. As would a stock return line.

 

[86_sports_1jz]

Hey Guys,

I have almost all of the parts for my single turbo 1JZ project, I just have the fuel system to get before the swap. My goal for the car is to crack 600rwhp.

I am thinking PTE 1000cc, DM dual pump hanger, 2 walbros, and SS lines throughout.

Are there any benifits or problems I might run into with running too big of an injector?
Will the 1000cc's be too much of an overhead for this goal? I want to overkill the fuel system so-to-speak so that I don't have to worry about maxxing out my injectors.

Any tips or advice is appreciated!

Thanks guys

Sam

are you going to be running e85 or pump gas?

850cc would be plenty. As would a stock return line.

at what hp do you need to change the stock return line?

 

[aphxero]

usually somewhere in the 600's. It really about keeping you pressure from being too high. If you have so much pump that it's jumping like 2:1 under boost and stuff then yeah get a bigger line. If regualtor is staying 1:1 and you can get it down where you need it then yeah it's fine.

Short answer? When it starts messing with your tune.

 

[blackkarma]

850cc or 880cc would be more than enough for what u want....remember u still need to be able to control your injectors so i hope u have a standalone

 

[87M-GTE]

850cc would be plenty. As would a stock return line.

I was thinking -8 feed, -6 return. SS all the way.

are you going to be running e85 or pump gas?

at what hp do you need to change the stock return line?

Pump/Race gas for the time being.

850cc or 880cc would be more than enough for what u want....remember u still need to be able to control your injectors so i hope u have a standalone

Is there going to be any advantage going with 1000s over ~880s or something smaller?

I have a Haltech PS2K

Thanks,
Sam

 

[aphxero]

the smaller the injector the more control you're gonna have at low load. prioritize the floor not the ceiling. it sounds like you had your mind made up already. just sayin.

 

[87M-GTE]

the smaller the injector the more control you're gonna have at low load. prioritize the floor not the ceiling. it sounds like you had your mind made up already. just sayin.

Thanks for the tip, I am not 100% set on any size injector at the moment.
I want to see what other people with similar setups are running (standalone, single, etc..)

Thanks again guys!
Sam

 

[aphxero]

word.

 

[Jostar]

Sam... im gonna run 1000cc, I seen Sp tune a few cars wit bigger injectors & idle like stock....

 

[GrimJack]

I'm running 890s and my idle is fine. Modern injectors can run a LOT better at minimal duty than the ones from the 80s.

I don't see a whole lot of reason to go bigger, either - unless you're thinking of switching fuels, anyway, running something like straight meth tends to muck with your required size.

Also keep in mind there comes a point where the injectors won't fit in a stock rail... it would suck to order some, then have to order the fuel rail when you find they don't fit!

 

[IBoughtASupra]

Sequential injection and a good tuner always helps with smooth idle.

800CC is good. There is a guy on SupraForums running 1200CC for 500HP, it is overkill but good overhead room and smooth idle as well. It is up to you.

You should be running a top feel fuel rail expecting to get to those numbers though.

 

[87M-GTE]

I'm running 890s and my idle is fine. Modern injectors can run a LOT better at minimal duty than the ones from the 80s.

I don't see a whole lot of reason to go bigger, either - unless you're thinking of switching fuels, anyway, running something like straight meth tends to muck with your required size.

Also keep in mind there comes a point where the injectors won't fit in a stock rail... it would suck to order some, then have to order the fuel rail when you find they don't fit!

By switching fuels you mean E85? I am planning on pump/race gas.

Sequential injection and a good tuner always helps with smooth idle.

800CC is good. There is a guy on SupraForums running 1200CC for 500HP, it is overkill but good overhead room and smooth idle as well. It is up to you.

You should be running a top feel fuel rail expecting to get to those numbers though.

I do have an HKS top feed rail.


I appreciate the help guys!!!

Sam

 

[GrimJack]

By switching fuels you mean E85? I am planning on pump/race gas.

Yes, that or pure methanol or ethanol. I'm not as familiar with E85, it's not available here, but meth/eth needs a larger fuel system. Not that I would run them, either, except as an additional injector to increase octane and reduce intake temps.

 

[JPsToyota]

E85 also needs a chunk of additional fuel over gasoline also ^

E85 has a good bit less energy (around 1/3 less) than premium gasoline but an octane rating of around 100 so it burns a little better.

 

[funky_monkey58]

I would go with twin aeromotive stealth 340 pumps, and some ID 2200cc injectors if I were to do it all over again.

 

[arknotts]

Pump/Race gas for the time being.

E85 also needs a chunk of additional fuel over gasoline also ^

E85 has a good bit less energy (around 1/3 less) than premium gasoline but an octane rating of around 100 so it burns a little better.

^^This is why I'm going with -10 AN for my feed line. I do hope to run 600+ whp on E85 in the future, so I'm leaving myself plenty of headroom. -8 may work, but -10 is only another $30 if you think you might benefit from it at some point in the future.

 

[AlterEgo]

Do yourself a favor and get Injector Dynamics 1000cc high impedence injectors. Very easy to tune, will support the power you are looking for and there's plenty headroom if/when you do upgrade for more power. Also very e85 friendly if you choose to burn the corn. E85>race gas imho.

 

[SupraMedical68]

I'm running 890s and my idle is fine. Modern injectors can run a LOT better at minimal duty than the ones from the 80s.

I don't see a whole lot of reason to go bigger, either - unless you're thinking of switching fuels, anyway, running something like straight meth tends to muck with your required size.

Also keep in mind there comes a point where the injectors won't fit in a stock rail... it would suck to order some, then have to order the fuel rail when you find they don't fit!

I know he stated that he is planning to run a HKS Top feed, but just for my own knowledge are there reasonable injectors out there that are a direct swap and are larger than the USDM 550s?

 

[tmsperformance]

dual walbros arent ideal. I would go with twin bosch 44's if your for real about your fuel system.