How does alchy, specifically Methanol, make it easier to run much higher boost? I know it cools the intake charge tremendously but the composition of the chemical makes it a good fuel as well. So the question is this, would running a large shot of methanol and race gas help or is it redudant? Does anyone have a real answer and not just speculation?

In other words... does the benifit from running methanol get stopped at a certain arbitrary number (So say it can cool any fuel to be the equivelent of running 110 octane) or does it just simply give an added bonus to any fuel? So on 93 octane, you can run say 30psi, 110 you could run 37 and C16 you could run 46? Im just curious... The other idea I have been thinking about trying is to actually spray a very large amount of meth into the motor via 4 injectors mounted on the intake manifold in front of each cylinder (To make sure each cylinder gets the same charge) and see if i can run more than 50% meth as the fuel source.... possibly even get it to over 80% meth. Granted this would most likely require a different o2 sensor to read the extremely low lambda reading accurately but I think it would be a very neat thing... especially in this big day in age of hybrid cars

Thanks for any info!

 

I believe the Dynoflash car runs methanol injection on top of VP Import (over 116 octane), so it must help even with the best race gas.

You can run an extra fuel rail for the alky injection. I think this is something that DSMotorsport has posted about before on here.

 

That would be another means to get it in the motor yes but more fabrication would be required... Then again I guess it would be necassary to make sure you have enough pressure across each cylinder. I like Nate.. he thinks like me

I know Al uses it on top of whatever he runs but thats not what Im asking.. Im asking for someones real results with it. Not just what he does... VP Import should not need any alchy imo regardless... I cant remember the name but the guy that decided to get rid of the wastegate on his Supra to run infinate boost... he capped out a 5 bar map sensor and shot a huge nitrous shot in it and the car still didnt detonate on the fuel Dont think Al's little car needs to worry about reaching the limits of VP Import

 

i dont see why meth wouldnt cool intkae charges with VP less than 93 octane

 

Well I would understand it may cool it down but how much of a gain would I see from it when using something like C16? Obviously the difference in 93 is huge.. but if I can run 35psi on c16 without the meth... how much of a change would it really give me or would it turn into more of an intercooler chiller type device where all it does is cool the intake charge some? The main question at hand is, is mixing say 25% meth to 75% race gas giving me any power?

 

Methanols octane rating is closer to 140, but it also requires a AF of 6/1. It not only thermally cools it's a huge octane boost hence the ability to run lot's of boost on pump.

I don't know of anyone that sprays methanol on top of race gas. C16 is good for 40psi+ and VP Import 120 octane is good for more, so just tune, tune, tune IMO>

 

The benefit is leaner/meaner tune. Higher ign timing numbers are a considerable gain as well as higher boost/ anti detonation characteristics. You do however reach a point where the fuel burns so slow that it is burning in the exhaust and this is the point that you speak of.

 

Well I was thinking more towards the 110 octane that you can buy for cheap. It is everywhere and is very cheap. I can run my car to almost 30psi with that... would adding meth make it capable of running 35 or so... and would it actually make it produce more power (By cooling the intake charge and by the added oxygen)?

 

We have hit over 34psi on the stock turbo on the MR. It makes a ton of torque. We deliberately went rich at that spike as to insure that it would not knock on the dyno. There would probably be a bit more on the table with leaner a/f at those boost levels, but we felt it was already pushing the limits as is on the stock bottom end.

 

bah Mine is stock bottem end... I ran it at 26-27 many many times on the 35R and did some tuning at 30 before the clutch took a crap. I think the bottom is fine till around 600... Who knows though right?

 

the bottom end can definitely hold upwards of 500whp pretty well as long as the car is tuned properly and isnt getting beat to death. As far as methanol raising octane, I'm not so sure about that. I thought the major difference between meth and race gas was that it in fact DID NOT raise octane but only cooled the intake charge drastically?? I could be wrong though.

 

I am pretty sure that it raises Octane greatly. The cooling effects are mainly from the water mixture that most people run.

 

Like mentioned above it raises octane at the same time it cools the charge.
To run that much methanol effectively you will need more cylinder pressure to burn it. Otherwise it will not get burned and your only benefit will be cooling effect. Remember though that the methanol at those levels will start to eat away at everything aluminum in the engine, like the manifold and cylinder head.