I am now running boost juice (49% meth, 51% water). I am looking to switch to 75 meth/25 water. Or even pure meth.

The problem i have is choosing wich meth to go with. There is M1, M3, and M5 from VP Racing Fuels: http://www.vpracingfuels.com/vp-drag-racing.html

Im unsure about running pure meth because of the corrosion problem. But with there newer M3 and M5 meth mix, it might be alright to run it pure and not corrode up the pump or injectors (Im running the basic cooling mist pump and injectors). Im am also unsure if a 75/25 mix might cause a problem when running pure M1 meth with water.

any suggestions here?

 

 

That is so wrong!

 

What brand pump do you have?

Some can't handle pure meth or even a majority meth ratio (such as 75/25 meth/water) so be sure to check. I've heard even some that advertise they can handle pure meth end up living a short life, just an FYI.

 

cooling mist pump. They advertise they can handle 100% meth, and a few people have.

 

I'm using Methyl Hydrate, you can get it at most hardware-type stores for cheap, 99.9xxx % pure, mixing 75/25 with a 200psi Shur-flo pump (they're all the same)

I'm yet to find any reason why this is worse than the stuff VP sells, other than not being certified as a fuel.

 

sweet thanks, did some searching and it seem like Methyl Hydrate is a good choice. And i can pick it up at Home Depot.

Thanks for the tip!

 

oh, how long have to been running the 75/25 mix?

 

Why not E85? Its 85% alky.

 

Because E85 is an Ethanol-gasoline blend, very flammable/combustible and wouldn't really be suitable for auxiliary injection IMO. I agree, if you have E85 available, it's a great alternative to run strictly in the tank and not even worry about AI, but it's not even remotely available to me (150+ miles) not sure about sen2two.

Also, Ethanol has a higher energy content than Methanol, and a lower latent heat of evaporation. Meaning, you can use more Methanol and absorb more heat than Ethanol by volume while replacing the same amount of gas in your tune.

 

^basically what he said.

and theres only one E85 station in my area. And its 30 minutes away. But thats not the problem. Im on the stock ECU. To make the swicth from pump gas to E85, tuning will need to be done...

 

yeah, but to add any significant amount of meth, you will need to tune for it too. I ran meth all last summer 75/25 and had to take some fuel off the top with it on, running around 15psi. Going to be cranking it up this summer.

What kind of turbo and set-up are you planning on using with a stock ecu?

 

its stock turbo. basically stock everything. seeing what i can get out of it stock, and later on adding a BNR or similar style turbo...

Im running 50/50 right now with no tuning, and it runs great. Im going to make slight adjustments and try a 75/25 mix to see what the results are. if it dosnt work, then i'll just switch back.

 

We used the winter blend E85(E70) and mixed in the homedepot alky. 3 gallons of E70 and 2 of denatured alky for what we figured to be an 82% alky blend. We tuned up to 14psi but stopped for the day when we had trouble getting the AFRs higher than 10. We are going to try again soon. If we can't get it to lean out I'll probablly switch back to the pure denatured alky. I just hate the $15 per gallon + 10% tax. ***** expensive in Chicago.

Would I lose power with a 50 water 50 denatured blend?

 

you mean you're using the E85 mix for AI but running on pump? And Denatured alcohol is just another name for Ethanol, it just has small amounts of methanol added to it so it's not consumable.

 

Yeah premium pump in the fuel tank and e85 in the AI tank. Figured instead of paying $15 a gallon I would pay $3 and its only at %15 less strength. This might be a failed experiment as we might be pulling more than %20 from the fuel tables to get proper AFR's. I was also considering using the spring/summer blend E85(3 gallons) with 2 gallons of ethanol mixed in to give a 91% alky mixture.

I was reading up on E85 and found some documentation stating that E85's actual octane rating is more like 94-96 and not the 105 being hyped.

At this point I'm not sure what to run for AI. My tuners choice AI is straight ethanol from home depot. Probably going to just stick with that for the next tuning session unless my tuner wants to keep experimenting with the e85.

I plan on converting to just E85 for next summer. Theres a station less than a mile from my house.

My mods are: Rotary res rebuild with street port, holset h1e, greddy IC, Jacobs on the primary, NGK 9's all around and a LT8s. I'm shooting for 400 HP.

 

Well, I'd suggest trying meth instead of the e85, mix it 75/25 with water, or even straight. You'll be pulling more heat out of the air, it will stop knock better, and it's a little safer to store than the e85 mix. Plus, you'll only have to pull maybe 10% of your fuel out or less, depending on your nozzle size(s), so if it fails you're that much less likely to run lean and blow your engine.

I know JRat on the forum made some good power and was using straight ethanol injected, not sure if he ever switched to meth or not.

 

What type of output difference between 100% ethanol to 75/25?

 

probably none, AI isn't really intended to add power, it's to add a safety margin and run higher levels of boost and/or advanced timing on lower octane fuel, which in turn creates more power. The side effect is that it cools your charge down, which can increase power. In that department, methanol works better.

 

Pretty much exactly what my tuner says. I'll be switching back to 100% homedepot juice for the next session.

 

although i have also read everywhere that E85 is about 105 octane. I have a conversion table from isecorp that list E85 at 123 octane.

I trust it because everything else on the LARGE conversion table is exactly correct. I dont see how a billion dollar corp. could be wrong, especially when its what they do. but i dont see how everyone one else would be wrong either...???

 

side note:

I have always been against injecting any amount of meth pre-turbo. but lately i been wanting to inject pre-turbo with a mixture. Im just curious about the corrosion hype. anyone here inject a mixture pre-turbo and have any turbo damage/corrosion?

 

I did it last summer, but not for long enough to notice any kind of wear. Plus, my compressor wheel nut came loose under boost, so....

 

about how long, and what mixture?

I think i just might try it out on my stock turbo. if it wears, i'll upgrade it to a bigger hybrid.

 

not even 1000 miles, 75/25 meth/water mix, only about ~350cc pre-turbo though.