so why are you saying the 100ll will hurt the car, my friend ran avgas in his RX7 all the time granted its rotary but still!

 

Rotarys don't have valves to gunk up, they run more like a two stroke ... and perhaps he didn't need to run any o2 sensors.

As for the EVO ... ANY 100LL fuel eventually damage stuff, probably sooner than later. I would personally not run it. There is too much risk of having lead in the fuel do more damage than intended.

If you're so intent in running high-octane fuel in the EVO, and keeping it as inexpensive as possible, I'd run some 91 mixed with Sunoco 104 or something. Or to get to 93 oct. for the street, buy some Xylene or Toluene and mix that with 91 or 93.

Good Luck,

jcnel.

 

hmmm I wonder if I can run 93 Octane in my lear jet ???

Avaiation Fuel = Airplanes
Automotive Fuel = Automobiles

any questions ???

 

Yes you can.....U can run just about anything you want.....Kerosene, diesel, 80 oct., heating oil, rubbing alcohol, irish whiskey.....(Not necessarilly legal for the FAA).

Although believe it or not, some turbine engines are actually APPROVED to burn AVGAS. But then it is only for a limited time before Ohaul cause Gasoline will burn hotter than the Jet-A

A jet engine is real easy to work. If its flamable....it will run(Not always efficently). They have even talked about new fuels for jets that are coal dust based.

Another fun bit of info....Bill Lear (The inventer of Learjet), Conceived a Nuclear powered plane with a small reactor to power it. Obviously it never got produced but it would be pretty cool to fly forever and never need refueling.

 

hmmm or maybe a nuclear car?

 

NASA or maybe the air force developed a nuclear powed cruse missle. All the way to the point of having a full size engine prototype running, and an airframe ready.

I saw it on Discovery Wings channel, what was that dammed thing called... ?

 

Sir, you must be from the east coast. Around here they only sell 91 octane at the pump. If they sold 93/94 here, I would not even consider putting AvGas in my car. But since they don't, us west coasters have to find other ways to boost our octane.

The unleaded race gas around here is $5 a gallon for 100 octane. The most inexpensive mixture to attain 93 octane is 3 gallons of 100 plus 11 gallons of 91 (roughly $2.30 a gallon.)

(100 x 3) + (91 x 11) = 1301 .... 1301/14gallons = ~92.93 (close enough)

($5 x 3) + ($2.30 x 11) = $40.30

So for a tank of 93 octane using 100 octane race gas I will pay $40.30. Not very inexpensive if you ask me.

AvGas is sold for $2.75 a gallon and has a MON rating of 98.8 octane. To attain a 93 octane mixture requires 4 gallons of AvGas and 10 gallons of 91 octane.

[i](98.8 x 4) + (91 x 10) = 1305 .... 1305/14gallons = ~93.23 octane.

($2.75 x 4) + ($2.30 x 10) = $34.00

Going with AvGas saves roughly $6.30 on every tank compared to 100 octane race gas. Let me also add that at just 35 cents a gallon more than 91 pump gas, I am paying only $1.40 per tank more for using AvGas.

My question yesterday was, "Do you have any experience running 100LL in your car?" So far, no one has anything to offer but speculation and alternative solutions.

 

somebody should really try out the theory, if not on an evo engine at least on a 2G DSM, the engines are kind of similar

 

Well I can answer the question. I have run Avgas in my other car and to be honest it seemed to run worse. I also have some speculation about it damaging my O2's. The car hasn't idle'd the same since I ran two tanks of full avgas.

 

Avaiation fuel has more air in the mix. Not a good thing.

 

if you do use it at least mix it with regular 93 octane gas this will help with the lack of additives that aviation fuel has and you still end up with 97% or so if you do 1/2 and 1/2

 

Yes ... and my experience has been don't run it, 100LL. AvGas is what a lot of people would get from my father (a professional aircraft mechanic) to try to put up with a super high compression ratio on a rebuilt V8 something.

The lead in there will eventually kill you. There are just too many 'extras' AvGas has been formulated with for the ol' Continential aircraft motors. There are better ways for Octane boosting.

Try some Xylene, Effective Octane ... 118.

(1 gal. x 118 oct.) + (13 gal. x 91 oct.) = 1301. 1301 / 14 gal. = 92.92 ... close
enough, again.

(1 gal. Xylene x $5) + (13 gal. x $2.30) = $34.9. and safer to run in the long run.

In about 30 sec. of internet searching I came up with this:

http://www.vtr.org/maintain/gasoline-octane.html

More upfront money would eventually mean getting a water-injection system.

BTW ... I think what you're finding is people on this board DON"T want to run 100LL, but they are kind enough to put something useful on this thread ... take that as a good sign.

0.02

Cheers,

jcnel. -> (your fellow math buddy from the worst western state on gas, anyways)

 

I run 100 octane unleaded that is supplied to me from a pump at the local 76 union wholesaler, Northern lights Energy, here in Redding..I paid $3.25 a gallon for it last time I used it. They supply it to a lot of hotrodders here for the drags and to the crotch rocket set. They are even opon on Saturday. I believe the manager there told me that it conatains metheletheline so it is sold as race fuel only (smirk, grin). Btw the owners manual for my car stipulates the use of 98 Octane (research number).

 

Care to elaborate on your personal experience with using 100LL? Your response on the matter is vague and 100% opinionated.

Basically what you're saying is it's safer to use paint thinner as fuel instead of aviation gasoline? You are aware, I'm sure, that there is no lubricating agent in toluene or xylene? The cost figures from that website are also off by quite a lot. The cheapest I have found toluene around here is $6 a gallon, and xylene is $11.

I'm sure not many (myself included) will want to store volatile chemicals in the garage to mix and stir as fuel for their car. I certainly don't mind a gas can full of gas sitting there. I can just store it next to the one for the lawn mower.

Bottom line is I am looking for a safe, convenient, inexpensive method of boosting octane.

It's more so people on this board "DON'T want to run 100LL" because no one has any facts pertaining to the pros and cons. It's ALL theory, unless you have some specifics to share on your personal experiences with using AvGas in a passenger car?? (facts only please)

 

Doug,

Unfortunately not only are we talking about the same gas but you and I are talking about the same pump at the same airport (Falcon field)... A lot of people go there at night to fill up their cars, and I've heard mixed things about the gas there. I've run several tanks of it on my turbo mazda mp3 and as I had stated before the car didn't feel to run, or idle very well while on the gas. After experiencing backfire and idle problems during the second fill up I spoke to Beau from Mental Addiction motorsports and he told me I should mix it with the 91 octane out here and that if I ran too much of it undiluted tha tit would kill my O2 sensors.

Since then I've found a GREAT fuel additive. It's not crap that you can buy at any automotive store but it's actual racing formula. It's called Torco and you can buy it from Beau at MAM- he now carries it since I discovered it. They have all the dyno charts to prove it's effectiveness and from what I can tell it does no harm. The cheapest place to order it is directly from Beau at www.mentaladdictionmotorsports.com but if you want to read up and research it go here http://www.need4speedpower.com/torco.html

"The Unleaded concentrate when blended with a 93 octane super unleaded makes up to a 104 octane race fuel for many of today's street cars, motorcycles, watercraft, ATV's, and many other motor sport applications!"