here is a quick run down of many things rolled into one.

water injection.

75/25 mix will yield the most power. if you screw this mixture up. you will lose power quickly. you would actually gain power by shutting it off and running race gas if you chose to run a 50/50 mix. fuel. not water. think about it.

gmr vs 272. i love my gmr cams. picked up 12whp and 10 ft lbs overall against the 272 graph. it held the torque longer, held the hp longer as well. nothing else has changed on my car aside from the cams.

both are good cams, just depends if you wanting to stay with a blower, or go turbo. they have their own flaws.

street tune afr and timing the car put down 290 whp and 260ftlbs 11.3-11.4 afr 20-22 degree's of timing on a 75/25 mix. just a small comparison against the 272's same afr. same timing. same pulley. the 272's did 283/257

why push the crap out of a car when you don't need to?

so in closing, take what you will from this. im giving out more info than i should, so run with it kids!

p.s. no i won't post the ***** out OMG dyno numbers. reality vs fiction

 

Nice job B, glad your happy

 

damn all of this on a stock heaton, very impressive.

 

i was giggling like a school after the first dyno run.

10.2 afr same timing the car did 286 right off the street. then leaned it out. 288. bit more. 290. then i fucked my water/meth mixture up. so i had to drain the tank. then it was onto bigger dumber things.

FYI. this is on a stock eaton. and a 2.7

stock head. stock manifold

 

Getting to close to my numbers know lol, i may have to go back to reassure my manhood.

 

hmm...exactly what i thought..i knew/said 272's werent good for the supercharged cobalt...glad someone actually proved it...good post bryan

 

check your pm's in a second

 

hmmm...

 

i wouldnt mind see your ***** out dyno numbers. im guessing you pushed it to about 12 - 12.5 afr on meth like you had on your 3.0 pulley dyno?

 

Im very curious as to why this is?

this is what i understand so far about water/meth

water is there for its (far greater) latent heat absorbtion
methanol is there for its higher octane properties

So once you reach an octane level where you can run your max timing,
wouldnt excess methanol be a waste?
wouldnt it be more beneficial to use water in its place to gain more cooling?

I must be missing somethin?

 

Great Info!

 

subscribed great info area

and good questions anamolous

 

an0malous thats a very good question. Soooo with that theory then. A 100% water mixture would be best for cooling right? If thats the case, since I am not tuned for meth yet, maybe I should run just straight water to keep her as cool as possible, which is my goal until i am tuned.

 

I wont pretend i know the answers to that 100%....
BUT water has a far better latent heat absorbancy than methanol

 

Great numbers Area getting closer too that 300whp mark! Why is it that you need 75 meth/ 25 water. If you run straight distilled water what kinda numbers you make? Also do you have full exhaust, header etc and a Heat exchanger/Option B??

 

he needs the more meth i am assuming because of the advanced timing. The reason people add methanol is so they can have more octane and can advance the timing without blowing there motors or having any knock etc. The water though is what keeps the motor cooler, i believe. So with that being said, he was probably running a 75/25 mix so he could have more timing advancement.

 

The "perfect" setup would be water before the blower and meth after the blower, that would take 2 kits though....or would it

 

that makes perfect sense to me,
but i know very well area can run that timing on a 50/50 mix

im not questioning it, because area only gives his first hand data, so it obviously happened.
im just interested in the "why" (as usual lol)

 

Eh, the point of the water is to control combustion chamber heat, so its still doing what you want if its after the blower. I would think that the methanol would evaporate through the blower and actually pull more heat, but I could be wrong.

 

The water will work best before the blower because it's purpose is for cooling, so it will pull some heat out of the blower. The meth is mostly for the added octane and you get more of it delivered after the blower.

 

hotter flame vs colder intake.

meth itself burns rather warm anyways. we know this. zoomer was actually right on the 50/50 mix part.

in a nutshell. octane. i wasn't going for cooling, i was going for power. water will not produce power in this type of engine. straight methonal will produce way more power than 50/50 anyday of the week. we know this. so why not run straight meth? flash point of 185 degree's. adding water raises the temperature. invisible fire during the day is bad.

im sure there is more to it than that. im just no where near awake enough to think about it right now

 

ehh, I like the sound of the 75/25 mix.

 

Nice number! Man, I'm excited to see what mine puts down. I'm hoping for 270ish, with a 2.9" on 87 octane (THATS RIGHT!!!). I should be fine, since I'll be running less boost than stock, and my intercooler is heavily modified, not to mention everything is cryo frozen (dissipates heat 33% better).

 

weaksauce.

 

you won't be running less than stock boost. you're be more efficient in producing power.

eat it turbo boy.

as i recall it took you race gas and a 2.5

:X