[flyboyzack]

I'm about ready to get my tune at topspeed, check out this thread for my project:

http://forums.nasioc.com/forums/sho...91#post13837791

Anyway, what are the main differences of running 50/50 versus 100 percent meth? From a power standpoint, reliability stanpoint, "engine cleaning," risk, etc, etc.

From what I hear 100 % meth does NOT give you twice the gains of 50/50. Any thoughts or experiences?

thanks guys

[modifyd]

50/50 ftw. I made 452whp with 50/50 on an FP green @ Topspeed!

[flyboyzack]

Nice ride, I saw it on Topspeed's page. How much power did you make off the meth, and did you do a 100% meth dyno run?

[RacerXS]

I was running 100% meth......until Friday when it got very hot out. I learned a very important fact about Meth....It boils @ 150 Degrees! If your running an underhood system, the Meth will boil and the pump can't pump a boiling liquid. This is a recipe for disaster.
Our underhood temps can get as high as 185 on a very hot day idling in traffic.
So, my conclusion....play it safe & either run the tank in the trunk or go 50/50 mix (at least in the summer).

As far as power differences.....I have heard that it's really not much.

[flyboyzack]

Yeah I have my setup in the trunk, I have just been searching forever and can't find out really how much more power you get by going 100% versus 50/50. Does anybody have some numbers or experiences? Topspeed usually uses 100 meth, but meth is very flammable. I doubt my trunk would get to 150 degrees, but still having a very flammable liquid in your car is kinda nerve-wracking.

[flyboyzack]

Nevermind...I found a thread, but any other insight would be cool though

[STimo]

^^What are you putting down with that SZ65? Do you have any dyno charts? How is the spool on it? How much boost and what type of gas you running? Sorry for all the questions i just haven't seen anybody run this turbo and i would like to see how it performs compared to my turbo.

[flyboyzack]

Well.............I dunno yet, I haven't got it tuned....yet muahahaha!!! If everything goes well, I'll have numbers tommorrow night. I can tell you that this turbo is NOT that laggy.


Any before/after plots of the 50/50 vs 100% meth?

[ninjaboy76]

I'm not sure about the power difference, but you should ask Doug. He usually suggest 100% meth. I would think the biggest advantage to just running 100% meth is not having to mix it. You are going to have to be dead on from a mixing stand point or you could run into real problems.

[Flycaster]

Originally Posted by ninjaboy76

...I would think the biggest advantage to just running 100% meth is not having to mix it. You are going to have to be dead on from a mixing stand point or you could run into real problems.

Oh common'...I use a one gallon container, fill it up with each, pour them into a 2.5 gal. jug, slosh around and voila, I have 50-50 dead on. It doesn't take rocket science to mix 2 liquids equally.

Moreover, the power gain of running 100% vs. a 50-50 mix is minimal due to the loss in cooling benefit of the water and the difference in safety is huge. On a recent GT30R tune, my tuner told me they saw about a 12 whp (3%) differential between the two mixtures. You have to ask yourself: is 3% worth carrying around a bomb in your trunk, much less in the engine compartment?

Not to me...

[ninjaboy76]

Originally Posted by Flycaster

Oh common'...I use a one gallon container, fill it up with each, pour them into a 2.5 gal. jug, slosh around and voila, I have 50-50 dead on. It doesn't take rocket science to mix 2 liquids equally.

Moreover, the power gain of running 100% vs. a 50-50 mix is minimal due to the loss in cooling benefit of the water and the difference in safety is huge. On a recent GT30R tune, my tuner told me they saw about a 12 whp (3%) differential between the two mixtures. You have to ask yourself: is 3% worth carrying around a bomb in your trunk, much less in the engine compartment?

Not to me...

You'd be surprised at what some people might try. Not everyone on here uses their brain. With only a 3% difference though you make a good point, but so far your the only one that has replied to this thread with any type of difference. Looks like running a mix maybe the way to go.

[flyboyzack]

Thanks guys...I have my tank filled w/ water and I'm wondering do I leave the water in and add the appropriate amount of meth, or do I just empty the damn thing out.

Seems like 100% will give you some more power, but are the risks worth it and the cost? I can get meth for 3 bucks a gallon, but distilled water is only 50 cents a gallon.

We'll see what Doug says tommorrow, and the numbers WILL follow

[Flycaster]

Originally Posted by flyboyzack

We'll see what Doug says tommorrow, and the numbers WILL follow

I'll be curious to see what he says. Frankly, if you interested in peak power with none of the EGT benefit of water, I think you're much better off just going to high octane fuel and be done with it.

I think a 50-50 mix is the best of both worlds: the substantial cooling benefit of water plus enough octane added back in to offset the power loss with minimal fire danger. But that's just me...

[billg]

Originally Posted by Flycaster

I'll be curious to see what he says. Frankly, if you interested in peak power with none of the EGT benefit of water, I think you're much better off just going to high octane fuel and be done with it.

I think a 50-50 mix is the best of both worlds: the substantial cooling benefit of water plus enough octane added back in to offset the power loss with minimal fire danger. But that's just me...

I'm just about to add my SMC meth kit in a week or so, and my research would indicate that Flycaster has it right for the reasons he cited. I'm going 50/50.

[flyboyzack]

I know it's more complicated for mixing but what about a 60/40 or maybe even a 66.6/33.3? Has anyone tried these combos out. If someone didn't mind the complication of mixing, it seems like one of these ratios may be a pretty good way to go. Any thought for you gurus out there?