I recall seeing someone had an issue where the cap you put over the pump nipple wasn't seating well in the hanger and was leaking.

 

Do you mean the accordion-like grommet on the outlet of the pump?

 

yep that's it.

 

A restricted return line would be the opposite effect, create higher fuel pressure, not lower. I have a car running twin walbro 450's with the ECA sensor in the return line and it's not an issue. You have something else going on. Bad pump, clogged/clogging fuel filter assembly, oring/grommet not seated on pump outlet, or the oring on that black thing that snaps into the bottom of the pump housing next to the fuel pump.

 

I also have my ethanol sensor in my return line without issue at 30psi 600whp+

I know some domestic tuners put the sensors in the feed lines and don't have issues at 900whp.

I also would encourage you to get the ability to view fuel pressure. It helps a ton.

 

900 seems super low to me. Even if you say 70% energy density of e85 over regular gas, that'd be under 1300cc. Why so much difference here? I feel something isnt adding up.

 

I'm not worried about the sensor being a restriction. I'm worried about the 90 degree quick disconnects that I used. But, what you guys are saying about a restriction in the return not lowering fuel pressure makes sense to me.

It occurred to me tonight that I may be able to mount my oil pressure sensor in the fuel rail and datalog fuel pressure that way temporarily.

 

90’s won’t make a difference as long as the internal radius isn’t choked. I have like a billion 90’s in my fuel system with the surge tank and what not.

I have my pressure sensor right before the rail. I also have one on the surge tank. Your thinking would work just fine.

 

On my car, I’m at 1392 with the 1650s on 93, so should be around 1070 on E85. With my old FIC1050s, I was at 1008 on 93. The 1650s do seem to “run small.”

The load discrepancy I’m seeing is about 15-20% higher with the 1650s at 20 psi. Who knows...maybe it’s fine and tuning in 40 degree weather vs 80 degree weather is throwing me off because the air temp compensation tables are off. I think my next step is going to be monitoring fuel pressure. I hate messing with the pump and my tank is full anyway.

 

the new buddy club seat rails have arrived. now back to waiting on those seats.... eta, april-may

 

Ugh, that reminds me I need to go ***** at Vivid for this 2mo wait if yours showed up right away.

 

that said, evasive may have had it already in stock - not sure.

 

All depends on how the other fuel stuff is setup- MAP/VE, RPM/VE and how the fuel table looks. I don't think Aaron tuned my car wrong

 

35-40% volume hit is what I believe is more commonly used when scaling for E-85. That would put 1650 in the upper 900 range. Ethanol actually has higher viscosity than gasoline so that also factors in. Then there are just all the other tables and settings like LGTD was mentioning plus more that play a role. It's really up to the tuner how they want to approach turning the dials.

 

Finally got a response from Vivid and they said its now pushed back another month to 2/26. So MFG is just giving numbers at that point and will probably slip further. Canceling with them and sent Evasive an email to see if they have it in stock and yours wasnt the last.