So I have been building my fuel system for my turbo AP1 recently and am overwhelmed with all the information I am coming across. So I wanted to put together my setup and see what others think. Hopefully other people can share there systems and results so we can have a nice collection of fuel specs with hp/fuel results. The big issue with my setup is I am still unsure what fuel I want to use so it is key for me to run a versitle system that will support 1000hp on gasoline or 800hp on ethanol.

Current System-

In-Tank Walbro 255
-8 AN Adapter fitting on stock tank feeding a 5" x 5" x 10" surge tank mounted in the center of the trunk
Dual -10 AN feeds to dual bosch 044`s powered by seperate 30AMP 10Gauge Relays
Y fitting
-10 AN feed to the fuel rail
Currently have ID1000`s
Inline Pro or Full Blown -10 Fuel Rail(Forget what on is the true 10AN one)
-8 AN Return off a Weldon Fuel Pressure Regulator
-8 Return line to the surge tank
-8 Overflow/Return from the surge tank to the stock tank

My idea is to run 100psi of base fuel pressure and with the ID1000`s I should easily be able to make my goal of 700whp on C16/Q16. My question is would this setup also support 700hp+ if I were to run E85, VP C85, or Ignite E98??? I know ID2000`s would do the job but I am trying to get away from having to spend $900 on a set of new injetors. Also ID2000 are not rated for MTBE so I could not run VP Q16 due to the swelling it causes.

 

 

The numbers seem close for E85. Assuming 850bhp, .8 BSFC, 80% duty, and 100psi you'd need 1473cc of injector flow, and at 100psi ID1000s are flowing 1530cc. You'd need 352 liters/hr of fuel flow and the 044s are pumping out ~220 liters/hr each @ 100 psi. (someone please correct me if my math was wrong somewhere). Have you considered getting 1300s? A little pricey but still compatible with all fuels and you can run a MUCH lower base pressure. Regardless, the 255 seems undersized for having dual 044s in your surge tank. A 450 would be better matched for your system.

 

Cool good to know sir. I really am trying to stay away from having to buy injectors... it just ANOTHER thing I would have to do, but if I need to then I will. As far as the 255 goes everyone I have talked to said it is more than enough. All the stock hanger/255 does is keep the surge tank filled. It provides no additional pressure to the system. Simply just maintains the surge tank capacity.

Thanks for your help man!

 

I know actually for a fact Geo @ Real Street in his stock motor S2000 that made 713 had a near identical setup. A walbro 255 intank with a integated engineering dual 044 surge tank. But they ran Ignite E98 and ID2000`s

 

It is certainly sufficient for most of the operating period, but with the in-tank flow ~350 lph in vs the theoretical 440 lph out from the surge tank it seems like it COULD empty but at the level you're shooting for it's real close. If nothing else swap out the non-E85 Walbro with a 320 E85 AEM, they're pretty inexpensive. I hear you on paying for injectors, my eyeballs about pop out when I see the price of 2000s, and 1300s are almost the same price.

 

good idea... yeah the 320 is cheap and easy to install

 

1000cc + 100psi base pressure will be cutting it too close to make 700whp on e85. I won't say it's not possible, but definitely not recommended. In addition the 100psi base pressure compounds your problems pushing the rail pressure up to about 130psi at 700whp. As you can see the Upper E85 Mark off the chart to the right. Does that make you feel comfortable?






What you may expect using 1300cc injectors at 75psi base pressure which would put the injectors at roughly 90% duty cycle.



And finally the spacious 2000cc injectors at 43.5psi base pressure.

 

which weldon fpr do you have?

 

So do I just went with id1300 and a walbro 450 E85 pump do you think I can push 600 on e85 by turning my fuel pressure up?