E-85 with Ron's Injection vs Carb

After running methanol earlier this year, I switched over to E-85 on Saturday on my Ron's Flying Toilet Injection system. Thanks to James Monroe at http://www.killerrons.com for the tune-up recommendation. I really liked the methanol, but the E-85 is even cheaper and works great with my 13.5 CR engine. I was happy to make it to the semi-finals before the rain started and we split the money 4 ways. The track was running 1/8th mile due to a Top ET (electronics) $5k double header, even though us footbrakers were running our regular 1 race and purse. In time trials, it went 5.92 both times and in eliminations every pass was 5.91 as the temp cooled into the evening (and relative humidity went up).

First I would like to compare my runs with E-85 last year in this same combo when I was running the "little" 950 carb. My 511 CID always liked the bigger Dominator carb in 2007 when I ran gas, so I figured it would like the added airflow of the Flying Toilet too.

At first estimate, I think the car would have run the following in the 1/4 mile last night:

9.515 x 5.914/6.007 = 9.37

Good data Jim.... what does that Ron's toilet flow

This is the big 4.1" Flying Toilet throttle body, and they publish 1800 cfm! The 4" is 1435 cfm. http://ronsfuel.com

I was happy with the sixty foot times on my old Phoenix slicks too (180 passes), 1.27

Jim

Your car and your results continue to amaze me.

Can't wait for the next report.

Todd

Here is a comparison with methanol and E-85 with the same injection system.

Estimating 1/4 mile time with the E-85 from the injection data (methanol), I think the car would have run:

9.236 x 5.914/5.834 = 9.36

Great info, JIM! For a bracket car, it is great fuel, and thanks for the info on consistency. Am curious , did timing differ on the fuels?

For those interested in the tune-up, open the attached file showing my wide band oxygen sensor data (LM-1). The black trace is the engine rpm, and the purple trace is the air/fuel ratio (set on the gasoline scale). It was pretty flat at 12.3 A/F, corrected to actual mixture for E-85 would be:

Stoichiometric ratio:
Gasoline 14.7
Ethanol 9.00
E-85 9.76

Lambda = 12.3/14.7 = 0.836
A/F act = 0.836 x 9.76 = 8.17

Quote:

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Great info, JIM! For a bracket car, it is great fuel, and thanks for the info on consistency. Am curious , did timing differ on the fuels?

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I am running the same ignition timing on gas, E-85, and methanol; 34 degrees.

On the 1st day tuning the injection with methanol in April, I started with 30 degrees to be safe. When I saw the A/F was OK, the next day I went to 34 degrees. I haven't tried little changes. In the attached PDF, during run 5 the fuel pump pulley came off just before 1/8 mile, so no timeslip. (34 degrees ignition timing)

Attached File

5291645-InjectionResults.pdf  (128 downloads)