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

http://img.photobucket.com/albums/v482/BBBjake/Dyno%20Sheets/109vsE85SAE.jpg

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


http://www.youtube.com/watch?v=yoM9naSrdXg

[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.

[BurnTire]

5378

Tuning chart I found. There are a few numbers floating around for 85% stoich.
This chart will give you a good idea on how to scale stoich for variances.

[BADASS03SVT]

nice chart....Ill use that when i go back up and try it on the bottle.

as far as a/f, i thought you could go a bit leaner on the gas scale bc optimal a/f for E85 was more like 12.1

[BurnTire]

nice chart....Ill use that when i go back up and try it on the bottle.

as far as a/f, i thought you could go a bit leaner on the gas scale bc optimal a/f for E85 was more like 12.1

The research I did indicates that richer seems to generate more power due to the additional cooling effect. Most of the tuners I talked to shoot for the mid 11's on the A/F.

That would be a good dyno project. See if it puts down more power richer.

What plugs are you running. I have the BR7's at .031 with no blowout issues.

[BADASS03SVT]

The research I did indicates that richer seems to generate more power due to the additional cooling effect. Most of the tuners I talked to shoot for the mid 11's on the A/F.

That would be a good dyno project. See if it puts down more power richer.

What plugs are you running. I have the BR7's at .031 with no blowout issues.

haven't changed them since 2006. TR6's....use them on the blower and on the bottle. Was going to look into it though as im not sure how the bottle is going to effect the car on E85

[BADASS03SVT]

did you do anything with the injectors form gas to e85?

also I found this on YB. I might go back to the dyne and try going richer




Lambda E85 AFR Gas AFR
0.500 4.880 7.350
0.510 4.978 7.497
0.520 5.075 7.644
0.530 5.173 7.791
0.540 5.270 7.938
0.550 5.368 8.085
0.560 5.466 8.232
0.570 5.563 8.379
0.580 5.661 8.526
0.590 5.758 8.673
0.600 5.856 8.820
0.610 5.954 8.967
0.620 6.051 9.114
0.630 6.149 9.261
0.640 6.246 9.408
0.650 6.344 9.555
0.660 6.442 9.702
0.670 6.539 9.849
0.680 6.637 9.996
0.690 6.734 10.143
0.700 6.832 10.290
0.710 6.930 10.437
0.720 7.027 10.584
0.730 7.125 10.731 @ Max Power Multi Turbo
0.740 7.222 10.878
0.750 7.320 11.025 @ Supercharged/Turbo
0.760 7.418 11.172
0.770 7.515 11.319 @ Max Power NA
0.780 7.613 11.466
0.790 7.710 11.613
0.800 7.808 11.760 @ Consistant Race
0.810 7.906 11.907
0.820 8.003 12.054
0.830 8.101 12.201
0.840 8.198 12.348 @ Part throttle RACE
0.850 8.296 12.495
0.860 8.394 12.642
0.870 8.491 12.789 @ Idle
0.880 8.589 12.936
0.890 8.686 13.083
0.900 8.784 13.230
0.910 8.882 13.377 @ Part throttle STREET (economy)
0.920 8.979 13.524
0.930 9.077 13.671
0.940 9.174 13.818
0.950 9.272 13.965
0.960 9.370 14.112
0.970 9.467 14.259
0.980 9.565 14.406
0.990 9.662 14.553
1.000 9.760 14.700
1.010 9.858 14.847
1.020 9.955 14.994
1.030 10.053 15.141
1.040 10.150 15.288
1.050 10.248 15.435
1.060 10.346 15.582
1.070 10.443 15.729
1.080 10.541 15.876
1.090 10.638 16.023
1.100 10.736 16.170
1.110 10.834 16.317
1.120 10.931 16.464
1.130 11.029 16.611
1.140 11.126 16.758
1.150 11.224 16.905
1.160 11.322 17.052
1.170 11.419 17.199
1.180 11.517 17.346
1.190 11.614 17.493
1.200 11.712 17.640

[BurnTire]

I upped the injector delta pressure to 50PSI.

What is your injector duty cycle?

[BADASS03SVT]

I upped the injector delta pressure to 50PSI.

What is your injector duty cycle?

Im not sure if Im reading it right on the logs....I think its labeled ISC Duty? the highest I see is .910.

my base fuel pressure is 30 @ idle...not sure what you mean by delta pressure.

[BurnTire]

inj duty cycle

You may need to update to a newer version of live link.

Delta pressure is what the tune commands. Stock is 39. If you up it to 50 at wot they will flow more. If you have not changed that with 80lb injectors you may be close to the limit. I will have to lookup the scalar in the tune. SCT has a value file for 50 psi.

[BADASS03SVT]

inj duty cycle

You may need to update to a newer version of live link.

Delta pressure is what the tune commands. Stock is 39. If you up it to 50 at wot they will flow more. If you have not changed that with 80lb injectors you may be close to the limit. I will have to lookup the scalar in the tune. SCT has a value file for 50 psi.

well I know someone running 80s @ 42 base on a 3.4 whipple, e85 making 725+ so I don't think they are close at 520.

I think I have the latest version??

I set the Regulator to 40psi at zero vac / boost. then with the vac line on its at 30psi.

[BurnTire]

I still have returnless. At 50psi I am at 85% inj duty cycle.

[BADASS03SVT]

and I do have an old version of LL....downloading the new one now

maybe we didn't log IDC?

[BurnTire]

I know the old stuff didn't have it.

[BADASS03SVT]

I know the old stuff didn't have it.

so I downloaded the new LL off SCT's site and it doesn't open...Ive deleted and downloaded it 3 tis and all the same outcome

[BurnTire]

I can send you the file when I get home if you like.

[BADASS03SVT]

I can send you the file when I get home if you like.

thanks....

[BurnTire]

I will shoot you an email tomorrow night.

[BADASS03SVT]

inj duty cycle max is 83. crossing the traps at 6780 they were 77

[BurnTire]

inj duty cycle max is 83. crossing the traps at 6780 they were 77 Nice and Safe.

[BADASS03SVT]

Nice and Safe.

yea...seems so at low pressure.

have you notice any difference in IAT2s or coolant temps with the e85? I have to go over some logs form last year but both of mine actually seem higher?

[BurnTire]

They look about the same to me. My ET and MPH improved so thats all that matters to me.

[BADASS03SVT]

They look about the same to me. My ET and MPH improved so thats all that matters to me.

yea or about the same. just thought the cooling effect would show up

[BurnTire]

yea or about the same. just thought the cooling effect would show up
It is more about a cooler burn. Others say the car doesn't seem to be affected by ambient temps as much with E-85.
Did notice home much quieter the valve train is?

[BADASS03SVT]

It is more about a cooler burn. Others say the car doesn't seem to be affected by ambient temps as much with E-85.
Did notice home much quieter the valve train is?

I can't hear anything over my exhaust. Lol

[4Jenna]

I'm liking E85 so far also!

[trucker]

it must have been one cold ass day but nice pass