another pump question

See if your battery voltage is dropping.

I'm not E85 yet but i've done enough reading on this Forum to say that I'm knowledgeable enough to answer your Post. While all setups are never the same, i would say that your tune is off. In the search field above just type "e85 80 lbs" and you'll see a history of posts regarding this subject. It's a good one!

DUH.... I missed the use of corn

Hiwinds said:

Ok I have a hot wire kit going to a turbo tweek 340. I have -8 line to a fram high flo filter housing with a wix filter then -8 to the rail then -6 back to the tank. 80# injectors. Motor is a stock bore 3.8 trws, ported heads and intake, 212 roller and a little bitty ta49. With fuel pressure set at 42 with the line off I am seeing 100% idc at 17-18 pounds of boost should I not be able to get atleast to 20-21 psi before running out of pump or injector on e85.?

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Its a huge mystery which injectors will fit your build. There seems to be no right answer other than go larger than you think you need. In my case the answer was to go 120's or blow up the engine. According to your information provided, it appears 80's would work ok. Things to look at that affect IDC are tune (if running pig rich, you are asking the injector to work harder). Voltage. Make sure that you have 13.6 at idle, and take a look when in your boost that you have this voltage. If not, there is your answer. I would encourage a volt booster of some sort. Make sure you are not starving the injectors by not supplying enough fuel (as in my case). The way I determined this was looking at a log. I looked at boost pressures and fuel pressure increases with each pound of boost pressure. As you know they are 1:1. If you notice huge spikes of IDC in the curve, this is an indication of fuel supply starvation whether it be restrictions, voltage, pump being bad, etc..... I explain it like this, if we are running along and someone takes out all your air, you will gasp and take bigger breaths for air, frequently, and more often, and erratic. The same is said about what the injector is doing, it is your lung. My car is a 575 rwhp car, boost pressure at 19lb, twin DW340s, 6262 turbo, all opened up, nice teflon lines no restrictions, etc....and my IDC with 120's was 78%.

What chip? Can you post a log?

Hiwinds said:

Ok I have a hot wire kit going to a turbo tweek 340

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Does that hotwire kit have upgraded grounds ?? All the voltage in the world won't help a pump with poor grounds . The circuit needs to be completely upgraded from battery + to battery - .

Post a log.
I would confirm fuel pressure under boost.