E-85 vs. pump gas wtih Methanol injection

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v10tt

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Nov 8, 2007
Guys, I know some of you use 100% methanol injection with pump gas with great results. e-85 is good also, but reuires bigger injectors and noise biger fuel pumps, plus in a true street car it becomes a pain the ass, as you become prisoner of E-85, and end up alwyas coordinating your trips around E-85 stations, etc.

Now power wise, are GNs making similar power on both set ups, or E-85 just owns all pump gas combinations?

thanks!
 
v10tt said:
Guys, I know some of you use 100% methanol injection with pump gas with great results. e-85 is good also, but reuires bigger injectors and noise biger fuel pumps, plus in a true street car it becomes a pain the ass, as you become prisoner of E-85, and end up alwyas coordinating your trips around E-85 stations, etc.

Now power wise, are GNs making similar power on both set ups, or E-85 just owns all pump gas combinations?

thanks!
Click to expand...
I listened to a guy talk on TV (Speed channel) the other night being interviewed about his car that was set up for E-85 and he stated where he lived it was 105 octane. I don't know much about E-85 but I can't see pump gas and alky making any where near the same octane. I could be wrong tho.

I agree tho, if you build ur car around E-85 you are stuck with it and you must find an E-85 pump otherwise ur screwed. I think eventually it will become more available but until then pump gas/alky seems the only choice unless one wants to spend $15.00 a gallon on Race gas.

I'm pretty sure the motor octane ratings is between 104-108 but it takes more of this fuel to create the same energy as pump gas. Your car will use quite a bit more fuel and your fuel economy would suffer so I don't think it is cheaper to run but octane benifits are certainly there.

But considering you will need more fuel pump, bigger fuel lines and more injector some might think it's not worth the benifit. The added cooling effect I would think would make it perform more it perform more like 110-115 Octane Racing gas.

There are guys running very high compression on E-85. I think like 16.1 so it obviously works well. I don't think pump gas/alky can compete with that.
 
I think there are "MAYBE" 1 or 2 BUICK guys in the 10s with E 85 :confused: . BUT there are a LOT of guys in the 10s and a few in the 9s with pump gas and alky :cool:

2 things to me against E 85..
1.Limited supply
2. need a lot of Fuel stuff (BIG pump, inj, fuel lines)


......... Also what are you E85 getting for fuel mileage ??? We do a lot of driving on the street . I don't want a gas guzzler :frown:
 
Grumpy

Add to the list. One of my best friends builds high dollar alcohol carbs for a lot
of the go fast guy's. The have had problems long term with E-85 uniformity.
Chasing tune with inconsistent fuel, not cool. But they are looking at dead on parameters.
 
Any advantage in using 100% methanol, vs. the 50/50 mix?

Does anybody know the octane rating of methanol?
 
v10tt said:
Any advantage in using 100% methanol, vs. the 50/50 mix?

Does anybody know the octane rating of methanol?
Click to expand...

we run straight Meth on my daughters street GN .. Works awesome .. BUT I am talking PUMP gas AND injecting alky so your not using alky all the time just driving around ..
 
I e-mailed VP racing fuel asking about the Octane rating of their M-1 Methanol.
This is a quote of their response:

M-1 does not have an octane, the machine will not test out to a
number that high. The octane machine can only give a number up to 120, anything over that is just a mathematical equitation
Click to expand...
 
v10tt said:
I e-mailed VP racing fuel asking about the Octane rating of their M-1 Methanol.
This is a quote of their response:
Click to expand...

well we have gone 138+ mph with pump gas and alky so it has to be doin some good :cool:
 
Grumpy said:
well we have gone 138+ mph with pump gas and alky so it has to be doin some good :cool:
Click to expand...

I think you would need more than 104 for octane to support that power level :eek:

Or rephrased.. how much octane would be needed to support 138+ MPH in a 3600 lb Buick running pretty :eek: high boost :confused:
 
blackmonte said:
110= 93/ alky?Or just meth?
Click to expand...

I'm talking about pump gas + methanol injection.

There are couple of cars in my neck of the woods running very fast on E-85 though.
An evo that runs 9.4 @ 150, and a honda S2000 with a Supra engine that runs 6.60s at 163 traps..
 
blackmonte said:
110= 93/ alky?Or just meth?
Click to expand...
110 RON for Methanol. Here it shows 113 but I have seen it as high as 123 RON as well.

Examples of octane ratings
The RON of n-heptane and iso-octane are exactly 0 and 100, by definition. The following table lists octane ratings for various other fuels.[4][5]
FuelRONMONAKIhexadecane< -30n-octane-10n-heptane0diesel fuel15–252-methylheptane23n-hexane252-methylhexane441-heptene60n-pentane62requirement for a typical two-stroke outboard engine[6]69671-pentene84n-butanol87E10 gasoline87–93n-butane91"regular" gasoline in US and Canada91–9287"EuroSuper" or "EuroPremium"9590–91t-butanol97cyclohexane97"premium" gasoline in US and Canada97-9893"SuperPlus" in Germany and Great Britain9893-94iso-octane10095-96benzene101"BP Ultimate 102"[7]10297-98E85 gasoline105methane107ethane108propane110methanol113toluene114ethanol116xylene117hydrogen*> 130very low[8]
 
v10tt said:
Razor, the Alki system you sell uses 100% methanol, or the 50/50 mix?
Click to expand...

Can use either. Its just your spraying preference. Most of us use 100%.

As you can use water, the tuning is different the higher you go in water concentration.

Grumpy runs where done on 100% methanol.
 
Grumpy said:
TSM boost 24#s :p :biggrin: Guys I am talkin a street car NOT a RACE car .
Click to expand...

You have to take that toothpick out of the gauge holding the needle.

Couple years ago, Laz was at BG and Roy ran 9.5 with iron heads, popped the glovebox and the boost gauge showed 24#. Thing was there was a bleeder on the line so 24 was the bled boost :eek: :D

I personally like second screw readings on a 30 PSI gauge :cool:
 
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