E85 Results, Track / Dyno

[BADASS03SVT]

Video at the bottom has all the info as well if you don't want to read!

Got the car tuned on Thursday on the E85 and had some great results. Same timing, same 11.9-12.0 A/F ratio and it picked up over the VP109 gas. Here is the graph



So she picked up about 15-20hp and 10-15tq through the whole curve. All we did was drain the tank and add the E85 and retune.

So fast forward to today. Was a bit chilly for racing but similar weather to what we get in October so this is a great comparison. I usually go easy the first pass or 2 to make sure the car feels stable and nothing is weird before going all out. Thank god i did bc the first pass I had an air bubble in the cooling system and about the 1/8 mile I saw the temp gauge go to 215+.

Let it cool for an hour and topped off the coolant. Said F*%$ IT, im going for it. Car felt fine

So shocks full loose, 2 step mid range and ready to rock. Car left great but didn't "feel" much stronger then the norm but man once I hit the 60' it came on HARD. For Comparison....

Previous best at home track (similar weather)
October 2010 after heavily messing with the launch (rpm, suspension etc)

1.341 (almost a 1.33!!!)
6.295 @ 108.19
9.940 @ 133.79

Previous best a couple weeks (Nov 2010) later down in Maryland ("Fast track")
(similar weather)

1.35
6.27@108.75
8.23
9.90@134.4x

AND TODAYS NEW BEST....FIRST AND ONLY FULL PASS OF 2011!

1.356
6.218 @ 109.74
9.823 @ 135.12

NO OTHER CHANGES TO THE CAR EXCEPT NEW FUEL SYSTEM AND THE USE OF E85!!!

Now to tweak it and go the 9.7x i know it will!

VIDEO

[4Jenna]

Awesome man congrats!

I'm in the middle of swapping over also!

-Chris

[BurnTire]

Welcome to the corn club Jake. E85 Rocks compared to expensive race gas.
Just be sure to test the consistency. I have seen 80 to 87% ethanol variance so far.
It change the stoich in the tune according to the ethanol %. I am tuned for 11.6 A/F on the gas scale.

[BADASS03SVT]

Welcome to the corn club Jake. E85 Rocks compared to expensive race gas.
Just be sure to test the consistency. I have seen 80 to 87% ethanol variance so far.
It change the stoich in the tune according to the ethanol %. I am tuned for 11.6 A/F on the gas scale.

yea I really have ot up here in the northeast bc I got E77-78 in the tank now. My next batch will probably be a little higher and Ill probably see E85 come June/July

[silvrsvt]

damn E85 is the shit!

Would be really cool to see gains over 91 pump!

[BurnTire]

yea I really have ot up here in the northeast bc I got E77-78 in the tank now. My next batch will probably be a little higher and Ill probably see E85 come June/July

What stoich was set in your tune?

[BADASS03SVT]

What stoich was set in your tune?

we tried using the 9.7 but it wouldn't work. we used 10.7 and it instantly worked.

[BurnTire]

we tried using the 9.7 but it wouldn't work. we used 10.7 and it instantly worked.

Would have probably been around 9.95 with 78-79%. You would have had to adjust the MAF Transfer to work with the correct stoich.

I move the stoich .05 for ever % of E-85 Change. 80% I use 9.85 86% 9.55

[BADASS03SVT]

Would have probably been around 9.95 with 78-79%. You would have had to adjust the MAF Transfer to work with the correct stoich.

I move the stoich .05 for ever % of E-85 Change. 80% I use 9.85 86% 9.55

.05 for every 1%? using 9.76 for stoich?

so if it was 78% you would add 7% or .30 and go with 10.01?

[BurnTire]

.05 for every 1%? using 9.76 for stoich?

so if it was 78% you would add 7% or .30 and go with 10.01?

Less ethanol = higher stoich.

If you had 85% and used 9.76. 78% would be 10.16 which is 4% more fuel 10.16/9.76 = 1.04

I got the A/F perfect at 11.6.
I just change the stoich accordingly based on Ethanol content and the A/F stays at 11.6

I usually datalog the first run when the content has changed to make sure the A/F looks good. It has always been safe.