93 octane vs E-85 back-to-back results

[10.5]

Went to Twiggs tonight with 93 in the car and E-85 in a jug on back of the truck. Carried my jets/air bleeds, tools, etc and did some back-to-back testing. First two passes were 93 pump gas--...2 hundredths between the two passes w/ 13.2-13.4 a/f. Then pulled the carb, changed jets from 84's to 98's/99's, changed high speed air bleeds from .039's to blanks on all 4 corners. Car slowed by 7 hundreths w/ 11.6-11.8 a/f. I didn't have any smaller air bleeds than the .028's (which didn't change the a/f much from .039's on the street). I decided to put two of the .028's in and leave blanks in the other two air bleeds. That put me much better. I ran absolutely identical to the average of the first 2 passes...and both passes were nearly identical to each other with a/f at 12.4 (still a touch fat on motor). I didn't want to fool with trying to tune to go any faster with timing, so I went ahead and changed plugs, pulled timing out, and put a bottle in. I went from 32* timing on motor to 24* timing on the spray (that's more than I needed to pull, but I was being extra safe). With a cold bottle ~850 bp, 5 psi fuel pressure 53N, 63F the turd went exactly 3 tenths faster than on motor. That pass had the a/f up in the 12.5 range (with low bottle pressure) so I went to a 63N, 82F w/ 5 psi fp, and warmed the bottle to ~950 psi. Ended up going 4 1/2 tenths faster than on motor w/ 11.0 a/f. I've never sprayed that small of a nitrous jet to that motor, but it ran pretty decent. No hiccups what so ever. I did notice that I have to be a little more careful when staging with the E-85 as the carb is leaner when idling, so when I get up on the 'brake, I have to stall it just a little to make sure it doesn't go lean and stall out. Other than that, it ran smooth and smelled sooooo good:D
I think that I'm going to go back to a 10 jet spread and bump the fuel pressure up to 6psi or so. Once that tune-up is on, I'll be digging for the big pills:D

Anyone have any 120 nitrous pills??? :D:D:D

Oh, and my lights were:

.462, .457 (daylight), .425, .445, .405 (that's right baby:D), .416, .426, .426, .431

[Patch]

Then pulled the carb, changed jets from 84's to 98's/99's, changed high speed air bleeds from .039's to blanks on all 4 corners. Car slowed by 7 hundreths w/ 11.6-11.8 a/f.

Wow....I didn't think E85 was THAT much more dense than Gas. that's a shit load of jetting lol.


your E85 A/F is supposed to be around 9.7

[10.5]

Wow....I didn't think E85 was THAT much more dense than Gas. that's a shit load of jetting lol.


your E85 A/F is supposed to be around 9.7

Yeah, I hope that I've got enough fuel pump when I get to the "big" pills. It's good for 230 gph, so hopefully I'm good...


Stoich for E-85 is 9.8, so best power would be about 8.8 on motor, and to be safe on the spray 7.8-8.0. That is on the E-85 scale. I was using the gasoline scale, which both are just a mathmatical manipulation of lambda. If you're using a gas scale for E-85 (or any other fuel), then you pretty much still look for 12.8-13.2 on motor, and 11.6-11.8 on the spray...at least that's where I'm trying get.

[Boomer]

So let's hear about those ET's? :D

[Kelly K]

10.5 I have some 102 and 110 nos jets if you want to try them on those cast pistons? We are planning on bringing the slow S10 tonite. I've made a couple of changes hoping to get some 6.5's out of the pos. The hood should stay on and not try to fly off.

[anything fast]

Yeah, I hope that I've got enough fuel pump when I get to the "big" pills. It's good for 230 gph, so hopefully I'm good...


Stoich for E-85 is 9.8, so best power would be about 8.8 on motor, and to be safe on the spray 7.8-8.0. That is on the E-85 scale. I was using the gasoline scale, which both are just a mathmatical manipulation of lambda. If you're using a gas scale for E-85 (or any other fuel), then you pretty much still look for 12.8-13.2 on motor, and 11.6-11.8 on the spray...at least that's where I'm trying get.

Sounds pretty good Randy for the first real outing, sorry I missed Friday with ya at Twiggs. Good news is I just made a my first hit in front of the shop out on the street with the new combo and it ran pretty good for a mild combo. First hot rod I have ever had with an air horn on the carb and something with timing on pump gas. I must be getting old.... :steering: Just glad to smell smoke!

[10.5]

Went back to Twiggs tonight for some more testing. I think that I'm ready to start racing with E-85! Went ahead and bumped up the nitrous to a 73N/91F (still with 24* timing...more than I've ever ran on pump gas). Had a good solid run (after it hiccup'd on the starting line...forgot to bring the R's up some when staging). I went in a little deep (staging) on that pass, saw yellow, and still went .394 red. I'll post some vids tomorrow after work. Next, I went ahead and went to some big pills...91N/110F. Two passes back-to-back in two different lanes and only had .006 between the E.T.'s between the two passes. MPH was identical down to the hundredth. STILL had 24* timing. I'm only about .05 off from my best ever with less nitrous. A/F was 11.5 when I looked down at the guage. I still need to bring the meter in and download the files, but I'll get to that tomorrow. All in all, this E-85 shit...IS the SHIT!!!

[F8LSNAKE]

We need to get you a FLEX FUEL emblem for your car now.

[EAD-fishing]

We need to get you a FLEX FUEL emblem for your car now.

:lol::lol:

[10.5]

First vid from last night w/ 73N/91F. As you can see, it didn't get right up on the 2-step at first...just need to remember to bring the R's up everytime w/ the E-85. I may be able to tune it out of the carb though. As you can see, you saw amber flash before I let go of the 'brake, but I still went .394 red...guess I was a little deep:D

http://www.youtube.com/watch?v=frPV-CD8-To

[10.5]

Here's a pass with 91N/110F. Notice that the shift light pretty much stays on in this vid versus the last vid:D

http://www.youtube.com/watch?v=LL0Li1qhYMM

[PangleRacing]

YAWN... Weaksauce..

Answer your PM BIOTCH!!!

Sammy

[10.5]

Last pass. Only .006 difference between this pass and the last one.

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

[joecoupe]

when you gona wash the windshield?

[10.5]

when you gona wash the windshield?

Then it would lose it's POS reputation.























O.K...that's BS...it'll still be a POS:D