JaredW

It’s finally about time to take my car in to convert to e85! I have had a fuel sending unit issue since I bought the car so while I am replacing the sending units I figured it would be a good time to take advantage of some e85! Curious as to what you guys think I will pick up?

Currently the car makes 555/508 on one dyno and 579/528 on another, the car was tuned on the lower number dyno and will be going back to that same dyno. Those numbers were made on 93 octane.

BTR Stage 3
Heads milled .030
Melrose 1 7/8” with Hi Flow Cats
B&B PRT
Halltech MF 103
NW 102
Mamo MSD
Walbro 450
FIC 850’s
DSX Flex Fuel Kit

When the car was tuned, he said that he did see some knock with 93 so hopefully this turns out to be beneficial!

Jayfabs

jayyyw

Depends on how conservative the 93 octane tune was. If they saw knock and pulled some timing you'll pick up more. I'm going to guess on the low end: 10whp/15wtq

JaredW

I’m guessing on the low end as well, then if it picks up more I’ll be pleasantly surprised! He said that he did pull some timing when he saw the knock just to keep it safe.

TXGS507

subscribed... in for results.

BigVette427

I see your mileage going down 40%.

JaredW

Can’t argue that But e85 is half the price of 93 here so it won’t be bad.

JaredW

Goes on the dyno at the end of the month.

jayyyw

I get better mileage on E85 because of the cost. Just have to fill up twice on E85 per 1 tank of 93. If you look at it that way, of course.

JaredW

Yeah it should end up being close to a wash between the two fuels. Not like most of us really picked these cars for their gas mileage

jayyyw

Getting over 30mpg on the highway when it was stock was pretty awesome. LOL

RamAir972003

The first dyno with the lower readings is what you want 588 525....the other dyno is reading high looked like std numbers..

nuke61

Awesome enough to go back to stock? I didn't think so, me either.

jayyyw

Yeah, definitely not.

MTPZ06

15/18

Macattack

Hey Jared, looks like your car is coming along nicely! I’m not surprised on the dyno differences, my two baseline dynos were off about the same amount when Mike moved to his new shop. Interested to see your net gains, your plan makes sense.

JaredW

Thanks! Yeah he said that's been the case with about everything since he moved to the new place. I'm going to have him do a new baseline because I have different wheels now, so that way it will eliminate as many variables as possible and be a true back to back.

Macattack

Good plan Jared, tuned in for results!

Drew03tx

I'm running a flex fuel setup on my HCI and did not gain a single horse on peak numbers, gained about 10hp and 20tq through the midrange though. Only difference was my heads were not milled and the sensor was reading only 70% ethanol. Not sure how much difference that makes

JaredW

Not having the heads milled is probably why you didnt see a huge change. E85 really needs some compression to shine. That's pretty good gains in the mid range though, that's more useful than peak anyway!