DR750's V1 guess the dyno

[kywhitelightning]

We are saying the same thing and you're beating your head against a wall trying to explain the same thing I already said. I could reduce the timing and the boost and then again prove the same thing. Adding the C16 to the mix, you would think would get the octane value near what the methanol brings when injected. The C16 mix with 93 only proves that the cooling effect that methanol adds allows the settings to be turned up to the levels they are without knocking. It's genious and right up your ally, bang for the buck. Maybe saying it differently will get you to see that. It's the same as running straight C16 vs the pump/meth mix with all the settings staying the same. Will it make more power just doing that? No. It has to be tuned/optimized. Can it make more? It should.

The reason I have chosen to run as much methanol as possible was your idea when you were running the 720's trying to stretch the capability of the arc. I'm stretching the capability of simply running 93 and filling my little tank occasionally with methanol.

Jeff

[CoopKill]

I thought all were on the same page that it allows power to be extracted, not adding it?

J are you saying different?

Sent from the Man Cave!

*\( ^o^ )/*

[kywhitelightning]

Coop, often times I have considered putting the 550's I have back in to see if they can do it. I think they could but like a friend of mine suggested, why run them at near max when these are being barely pushed. The 550's had very little starting problems and where very easy to flash in a solid tune with. The 680's were much more difficult to get right (mainly starting problems). IDK why and maybe Greg can expand on things I can't explain. That would certainly be a nail in the coffin on how much power from the extra fueling the methanol is providing. You would think that the IDC's + the rail pressure ran would speak volumes but, some just like to argue I think.

Jeff

[kywhitelightning]

Fuel volume test completed. There was no difference in volume hot or cold. There was a difference in the guage pressure hot and cold though. ~1.5 gallons/min both times. I put a line on the jug to mark it with the hot reading and the cold level was at the same spot.

Jeff

[fastbikes76]

Informative post and testing. I have the same enquiring thought process as you and always like too prove all my theories.

8-)

[kywhitelightning]

Methanol volume test today was 1675ml/min. I'll retest with the 3/8 feed and report back. Fingers crossed for a healthy increase in flow.

Jeff

[CoopKill]

Fuel volume test completed. There was no difference in volume hot or cold. There was a difference in the guage pressure hot and cold though. ~1.5 gallons/min both times. I put a line on the jug to mark it with the hot reading and the cold level was at the same spot.

Jeff

Would flow testing under pressure change the results at all?

[kywhitelightning]

I don't think you can and if you did I don't know how you would get any useful data from it as pressure is created from restriction. Looking for flow on a restricted line would change the pressure ie create more flow reducing pressure.

Jeff

[Chris@Rvengeperformance]

I think what he is saying is the 30 PSI of pressure in the intake piping is going to reduce the methanol flow.

[J. Fast]

Like I had mentioned earlier it's just the fluid in the gauge reacting with temperature. Onto a second issue, boiling fuel. If infact you are superheating fuel in a racing environment such as road course (you aren't) the tune will start to lean out and your power output will drop about 5%. That is a result of heat of vapoiization and specific gravity changes in the fuel. Keep testing, you'll find your own way.

As far as the comments made earlier regarding making the same power output on racegas as methanol, I'm sorry but that's a mis-nomer too. The only reason why the power output was the same was because the timing and afr was the same. One of the benefits of meth is its heat of vapoiization and burn off time. Those qualities impact timing. The knock threshold for meth is about 6° beyond that of racegas. Where you have to stop with racegas due to knock... you can keep advancing with meth. Unless you have an ignition control device you cannot optimize and reap 100% of the benefits of methanol. As I recall Matt M likes the stock ECU. You will never see 20+ degrees of timing advance in a stock ECU at 25+psi. If you have no ignition manipulation device ofcourse one can say you can't make more power. However, talk to Lucas English who performed back to back tests and increased power output by 10% in area under the curve...and 9 second bracket cars that shave .3 in the 1/4 mile from the fuel swap alone.

If you optimize combustion events for any fuel at the same afr the one with the higher BTU rating will make more power. That's chemistry and physics.