Fuel setup. NRG tank, Duel Bosch pumps, #2 40 micron ss aeromotive filters (before pumps), #1 100 micron engine bay filter (removed), GE fuel rail, ID 2000, fuellab fpr set at 65 psi, fuel lines two -8's Y int one -10 upfront, -6 return.. Running e85

During tuning inj were at 89% duty cycle at 25 psi. We thought filter might be dirty so we removed the engine bay filter. Still same prob. Got off dyno inspected and cleaned both pre pump filters, they were like new still clean. What else could the problem be? Hondata s300 tuned by Daniel from churches

Any advise.there is no way we should be close to maxing out the injectors at 25psi.

Some pics of the fuel set-up

 

Do you really trust that? 2000cc even on e85 should be good for at least 900whp at 65 base FPR. Do you have the vacuum line hooked up for the 1:1 boost reference?

 

what kind of power were you making?

 

What hp? and what turbo at 25psi?

 

Why do you have 40 micron filters before the pump and a 100 after? and why is your base pressure at 65lbs?

 

It made 580 on 20psi. (pte 6262 .82) Was shooting for 35psi but it started leaning out at 25psi. We were steping up boost step by step. Started 15 psi- 20 - 25... Ran into problem. What else could cause this? Clog lines?

 

The 100 micron filter was removed. Just has the two 40 before the pump

 

Trust what

 

What base psi be at. left it to the tuner. I'm not very experienced with e85. Could this be the prob.

 

TTT

 

How do you have your fuel pumps wired?
Next time you do a pull, check to make sure that the fuel pressure rises as boost comes on with a fuel pressure gauge.

Either your pumps are not getting enough power or you pressure drops in boost due to a FPR.

 

Are you sure both pumps are running?

 

Yes both pumps are running.. Fuel pressure stayed at 65psi through out boost.. Pumps are wired to fuse box 12v each w/ individual relays.

 

Did u guys try turning up the fuel pressure?

 

do you have the vacuum line to the regulator hooked up? it should rise equal to boost pressure.

 

stayed at 65psi? with 25psi of boost it should have gone up to 90psi assuming its a 1:1 regulator.

 

This is a valid question that I caught too. Your filters should step smaller in sequence. Going from 40 micron to 100 micron is backwards. Thats like using a coffee filter and then chicken wire. Alot of people make this mistake.

Another observation is the physical size of the 40 micron filters. The amount of surface area vs the micron rating is responsible for the flow. I have a single 10 micron filter after my pumps but its way bigger than yours. What model number are the two 40 micron Aeromotive filters?

Are you sure your filters are Ethanol compatible? If not the Orings can deteriorate and possibly clog.

 

The 100 micron filter was removed on he dyno. Just have two 40 micron filters before pump. They are ethanol compatible. O rings were fine and filters were clean. I don't remember the fuel pressure rising under boost but I could be wrong, have to double check with my tuner again.

 

What size wires are going to the pumps? I would use at least a 10 gauge wire. Did you check to make sure both of the pumps are working?

I have the same setup as you and I had a lot more fuel to work with.

 

What do you mean it is wired to the fuse box?
The way I set mine up was use the power wire from the stock fuel pump as a trigger for the relays of each pump. Which is wired straight to the battery.

 

I have done several cars like this it seems to work well.

 

make sure witha test light or a volt meter that both pumps are working, if only one is work or one is working harder then the ohter they can back feed through the other pump. base should be 100 psi to make the id 2000s flow 2000cc a min

 

Base pressure is not really his problem right now, his problem is probably a failing FPR that cannot increase pressure as boost rises. If he had a failing pump his pressure would probably drop at this power. Test both the pumps and FPR.

 

Set how, car off or car running on idle?
If its set off, then on idle the fuel pressure should drop slightly. If it doesnt, then sounds like there no manifold pressure referencing going on with the FPR, which would also explain why the pressure isnt rising with boost.

 

Your problem is your FPR. 65psi through boost isn't correct. You should be 1:1 so at 10psi your gauge should read 75psi if base is 65. Check you vac line for cracks/splits/connection leaks.