nguyen365

Hi guys just checking in to see what else I need to run on e85. I have id1000s gtx3076 stock fuel line with fbm340 fuel pump using stock filter. Pfab elt manifold.

I purchased the gm flex fuel sensor and I have aem V2.
Currently tuned at 11.5 psi on 91 Costco octane. (Is it true that shell 91 octane is better).

I do not run a boost controller. Do I need one of these to have my tuner tune of e85? I mean what is going to tell my bov to not expell hot gases when I'm on e85 running at 22psi vs 11.5psi on 91 octane. Does the ecu take care of it?

Tony

Mijae007

Are you just running off wastegate spring? If you dont plan on setting up boost by gear or high and low boost settings then a boost controller isnt needed. If you have a my s2000 with return fuel line all you need is to empty fuel tank completely(there are many creative ways to do this lol), fill with e85 and tune.
if you have an ap2, i highly encourage getting return fuel line put in, then e85 and tune.
your 1000cc injectors may max out at around 450-500whp on e85. Other than that, its all in the tune.

Mijae007

Also since you already have the flex fuel sensor install it and tune for flex fuel. Im running 100% e85 all the time so its just tuned for that, no sensor. Some will argue e85 content will differ season to season and gas station to gas station, but propel and pearson e85 stations here in cali have consistently been 85-90% all last year when tested. If anything, the car will run a little more rich if you fill up on gas thats lower on e85 content. Some dont want to risk getting bad gas so yea, a full flex fuel tune is ideal.

Charper732

My car is currently on a flex fuel setup. I was thinking I would run 93 more than I do, but I've ended up being on e85 all the time. It's interesting to see difference in ethanol content of e85 at different stations. If you are doing this for power, then 1000cc injectors will not get you there. As Mijae said, you will end up at 450-500 on e85 maxing out the injectors, which is about the same hp you can safely get on 93. . Depending on what power level you are going for, id1300s seem to be the sweet spot between good power and idle characteristics. Moddiction had a pretty sick deal going on when I called ryan.

On a side note, I had issues with a brand new 340 pump failing when hot, on the dyno. I swapped it out for a walbro 450. Just using the stock FPR its at 60psi base pressure.

nguyen365

Thanks for the input. I really want to have the option of switching between the two fuel just in case I go out of town. 91 has the range. With my aem V2 my car can automatically adjust boost between 91 octane to e85 and any mixture of the two.


I found out from my tuner that what I needed was a boost solenoid not a boost controller. E85 can run with a boost controller but it's cheaper to run a boost solenoid and let my aem V2 be the boost controller.

My tuner said that I shouldn't go past 15psi but there are lots of guys that are at 22psi on e85. I think it'll be safe at 18-19psi?

Charper732

That is entirely dependent on how aggressive the ignition timing is.

I'm at 508hp on e85 at 16psi on a PTE6062

s2000442

Yes you will be more than fine at 18-19psi. That will put you around 550-570 depending on the dyno. I ran that level for years all stock no issues.

MorngWoodStewie

Ya it's all a trade off. If u don't go solenoid you'll be stuck to one psi. Which would only allow u to exploit timing with more E.

doesnt matter how low of a psi between what you think is safe on E and your tuner. Cause his lower psi on E could have more timing then what you think is safe (higher psi) but with less timing.

Point is being able to adjust timing and psi as percentage raises, this will give you the greatest potential for tuner to dyno graph and say "ok it wants more psi, or more timing vice versa.

If your stuck at 15lbs and u run a tank of 91 you'll have super low total timing at red line.

Edit: I'm at 490 and 343 on pump 92 around 75% injector duty cycle, so there is some to be had but honestly think with the common research of 30% more fuel to make the same power, these #'s might just match up or be "negligible" I have decided not to push em. I do however spike my pump (not with additive tho) to 15% E or 2ltrs of a higher octane (preferred) race gas when I know I'm gonna be doing continous competition "Cruz" runs.

​​​​​​I'm on ID1ks

nguyen365

dont get me excited.

nguyen365

darn should have gotten 1300s. I'll max my id1000 first