Injector HP Capability

[SanTa_]

For a 100% Duty Cycle of my 75lbs/min I'd have to go with the 1150cc.
Though if I wasn't running 100%, which I'll leave it at 80% then these will do just fine.

I'll increase boost up for track use at 100% to get the turbo to its 75lbs/min. Or should I increase the inectors since "I do not advocate running the fuel pumps at their maximum flow"


If I can reach full boost at any of these listed psi's.

Denso Supra 260 (Rewired)

10psi = 82.91lbs/min
11psi = 82.38lbs/min
12psi = 81.83lbs/min
13psi = 81.28lbs/min
14psi = 80.73lbs/min
15psi = 80.17lbs/min
16psi = 79.60lbs/min
17psi = 79.03lbs/min
18psi = 78.46lbs/min
19psi = 77.88lbs/min
20psi = 77.08lbs/min
21psi = 76.71lbs/min
22psi = 76.11lbs/min
23psi = 75.51lbs/min
24psi = 74.91lbs/min
25psi = 74.30lbs/min

Should I run 15psi for street and track?

 

[the_mork]

Honestly I'm not sure you're really going to reach anywhere near 75lbs/min. Keep in mind that 16g turbos when really pushed can hit about 400hp with around 40lbs/min. The reason that you do not run a fuel pump at its full rated capacity is because there are losses due to fuel line restrictions between the fuel pump and the injectors. There is also the possibility of voltage drops which will also impede pump flow.

I would suggest that if you are really trying to reach the top end of this turbo you will be boosting well in excess of what that chart shows and you will need a larger fuel pump but you also may never reach the point where your compressor is flowing at that rate. Keep in mind that the compressor only flows as much as the engine breathes.

If your goal is still 400-450hp then probably you would be fine with a single pump, even a wally 255hp with the pressure relief punched in and injectors in the 750cc range. I would generally go with about 40% more fuel system than my car would need on pump gas because the extra cost is minimal and it allows you to switch to e85 with a healthy safety margin if you choose.

 

[SanTa_]

Yeah I understand. I'll be more logical then.

I'll stick with the denso 260 for time being as it'll be more benefitial later.

I was thinking 1150's too on safer note if you say you like to do 40% more

No near e85 gas stations near my area

 

[endeffect0]

sounds like a good plan, the denso supra pumps arent that hard to find... just gotta look on the MK4 supra tuning sites.

and i agree that you wont be reaching that 75lbs/min of flow. but you want a fuel pump and injector setup that would get you close. I think you will be fine with the denso and the 1150s for a good long time.

post up when you get some pics of all the fun parts.

 

[ElectronVTEC]

I picked up a Supra TT pump for around $100 used, planning on adding an 044 inline if I ever push more air than the pump can handle (very doubtful).

 

[SanTa_]

Thanks for the insight guys! :]

Well I did mount the fpr today. Starting to do the relocation fuse box..
AWD conversion is in the works now..

Engine bay is painted.

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[SanTa_]

Now that I'm doing my AWD swap..would bigger injectors be suitable? Like.. 1200's +?

 

[endeffect0]

hey man, you can go as big as you want. but i really think you have you butt covered for a long time with the 1100s. the awd change over isnt really gonna affect how much boost your engine can handle or how much fuel you will need. just how that power gets to the ground. my advice is just start saving up for broken AWD parts and when your done replacing things that fail you will be ready to up the boost and add more fuel.