I have ordered 99.98% meth, a 55 gallon drum. I will more than likely run a 100%, but here is some is testing in the mean time.

I know there are tons of parameters to test around. I understand that the true power to be gained is in the increase of boost and/timing. But, FWW here is 60(meth)/40(water) window washer fluid (Prestone -25*) just added to the scenario. All runs are from dead stop to 100MPH on HPT. Tonight it was 75* out.

1ST run (No meth/water) Actual Shift Points were 5908/5990/n/a
IAT @ start was 127*. ECT @ start was 183*
IAT @ end(100MPH) was 162* and ECT was 190*
Advance @ Launch 17*
AFR @ 1/2 was 12.56 ( not sure what happened there).
AFR @ 2/3 was 11.73 (11.60 commanded)
AFR @ 100MPH 11.45 (11.41 commanded)
Advance @ 100MPH 13.5*
Highest InjDty Cycle was 98%
0 to 100 MPH was 14.391

2ND run (meth/water) Actual Shift Points were 6044/5912/n/a
IAT @ start was 124*. ECT @ start was 181*
IAT @ end(100MPH) was 151* and ECT was 185*
Advance @ launch 17*
AFR @ 1/2 was 11.84 (11.70 commanded)
AFR @ 2/3 was 11.34 (11.60 commanded)
AFR @ 100MPH 11.00 (11.41 commanded)
Advance @ 100MPH 14.5*
Highest InjDty Cycle was 95%
0 to 100 MPH was 13.47

3RD run (meth/water) Actual Shift Points were 6040/5979/n/a
IAT @ start was 122*. ECT @ start was 183*
IAT @ end(100MPH) was 151* and ECT was 190*
Advance @ launch 17.5*
AFR @ 1/2 was 11.91 (11.70 commanded)
AFR @ 2/3 was 11.25 (11.60 commanded)
AFR @ 100MPH 11.05 (11.41 commanded)
Advance @ 100MPH 14.5*
Highest InjDty Cycle was 95%
0 to 100 MPH was 14.6 ( I tried 2wd..ugh...beginning of scan is all spin.)

So, not tuning around 60/40 of meth/water (okay okay, windshield washer fluid...not the same I guess, but I'd gamble pretty close) it appears this particular mix...

took 11* off my end IAT, which helped recover a degree of timing, and dropped my AFR not much at all in the beginning but about 4.5 by the 100MPH mark. I am commanding 18* at 6K but only seeing 14.5*, this isn't good. My IAT retard table isn't pulling timing until 158*. I am not going to mess with my tune that much for now as I am getting 2 bar soon, but I thought most would find this interesting if anything. I always wanted to see the results of such a test on a "normal" modded FI truck.

The other cluster screw is my meth injection system, I built it out of a msd rpm switch and a boost switch, along with an injector, siphon pump, and pump from a speed shop. I can't get my rpm switch to activate(rpm signal has me baffled). SO I put jumpers in the rpm switch but the boost switch keeps everything from coming on until 3.5 psi.

My analysis for now...3rd gear sucks ***. 4889rpm at 100mph at 11.01 afr. Ugh. Definitely take some fuel away fom her in upper air speeds. Hey it was fun. Slower than what I was thinking also, but she is heavy and tuned a little passively.

 

Very interesting, BTW I think the 2000 ext cabs are the heaviest of all the nbs Chevy’s. lol

What did you pay for the drum?

One other off topic question, What color is your truck??

 

That's cool. It would be good if you could do 3 back to back runs of meth/no meth to find an average.

 

Methanol Price On the scales without me she weighs in at 5225, half tank of gas. That's with a hard/fiberglass cover and the LT package. The every so popular maroon.

I really wanted to do this. But in all fairness of a test I wanted to get away from heat soak and I was limited to how much craziness I could get away with on Memorial Day...cops frequenting my "test dragstrip". So, with that said I drove a 12 mile stretch of road that has about 4 real good long flat straight aways on it. After each run I could drive and cool my ECT and IAT back to the same as it was on the prior run. Making comparison a little more fair, since I wouldn't be doing alot of one run to get an average. I agree this is a way better way to get results, multiple shots in the same format.

I will say I am boggled why I am losing some timing compared to commanded. I do have some degrees taken out of the low octane table, but I don't understand why that would affect anything.

 

I don't know if 98.98% and 99.95% is much of a differance but WWW.vpracingfuels.com
has warehouse's all over the us and it is about the same price.

 

Good Info. I hope to do the same type testing soon. I've got to get the EIO for HPT so that I can pull AFR and boost in and log.

Curious how you command AFR during PE?

 

For comparison sake, I was at the strip on Saturday night running 100% water, and my IAT's at the start of the run were low 110's (111-115), and I was always high 130's to low 140's at the end of the run. I am running as much as 21* timing in the mid-high RPM range and about 18.5* towards the top (IAT spark table is pulling about 2-3* through the run). 1-2 shift at 6500 RPM, ran the whole thing without shifting into 3rd. I have no idea where your timing loss would be coming from. No KR right? No IAT reduction....burst knock wouldn't give a constant reduction, maybe ECT reduction? You should try logging all of the spark PID's that you can and see where it's coming from. It's gotta be in there somewhere.

AFR's were dialed in pretty much spot-on at 11.5:1 through the entire run.

 

PID commanded AFR High resolution

LOL I zero'ed out those tables.

I am working my way there, I have dual springs and the cam to do it, just seems so wrong you know? LOL I want to creep up the shift points and trying to see where the power falls off at. Somebody is borrowing my G-Tech right now or I could just compare g forces between shifts.

So 100% water will lower your IAT's twice as much as my 60/40. Goes to be expected I guess, twice as much water. Hehehe. So you hvae your IAT table pulling at 130? 140?

All my spark tables aren't "supposeded" to be pulling anything, ECT, IAT, all of them are zero in the respectable temps I am at.

What kind of boost are you seeing in your run mentioned thunder?

Seems what is hard (at least 1bar) to tune for is the 11.0 afr I am getting in third gear but not in 1-2. I only know to mess with PE multiple right? In that table 5000 rpm is 5000 rpm. (***EDIT***NEVERMIND...PE Fuel adder vs Intake Temp is adding some fuel in those temps. I will correct this to see if we can get these afr's in line in the upper IAT areas.)

 

Update...I deleted my IAT PE fuel adder for certain temps...and I did one run and had 11.4(instead of 11.0) for afr at 100mph, then...my afr froze. ARGHGHGH!!!! The zip tip tie melted and my pigtail fell onto my lovely 1600* exhaust. That's not good. Freaking jerry riggin A-holes...wait that was me...! LOL Nevertheless, I seemed to get more of a commanded advance this time. Felt ALOT stronger...SOTP. I will repair the WBO2 and fill in as I adjust and add more timing and less fuel.
Good night all.

 

great info...can you post some pics of your meth set up?