moe7404

so we all know that gasoline has a flash point of -45 degrees F. and ethyl alcohol flash point of 55 degrees F. so what flash point is the 10% ethyl alcohol in gasoline? i will guess -40 degrees F.

Mr.4spd

My guess would be that the ethanol/gasoline combo would be worse than gas by itself, by how many degrees I have no idea. It never gets colder than -12 or so where I live so I'm not sure how to test it real world.

Coronet 500

Why?

moe7404

i got to thinking about how easy gas starts cause its flash point is -45 F. but ethyl alcohol is 55 F a lot harder to start. so how much does the gas with 10% alcohol change in flash point. making it harder to start than gas.

RacerHog

The Answer is.... None..... You left it in a state of liquid.... And the last time I dipped a match in a can of gas... The flame went out..

demetri

I would expect that the flash point will be dominated by the fluid within the mixture with the highest flash point, as long as it is in there in sufficient quantity. I.e., the property may not be proportional with concentration.


But don't know for sure.

Coronet 500

See pg7. http://tsocorp.com/wp-content/upload...eaded-E-10.pdf

moe7404

well -5.8 degrees F is a bigger change than i wold have guessed, with only 10 % so with the -5.8 flash point if the air temp -5 F or less it will be hard to start.

RacerHog

Why is it harder to start?

Mr.4spd

Because Obama.

moe7404

generally a higher flash point is harder to start.. ever see the nitro guys use gasoline to start a nitro engine? gasoline -45 f.....methyl alcohol 52 F......ethyl alcohol 55 F.....nitromethane 95 f......xylene 63 F.......touene 40 F..... kerosine 100--162 F.....diesel fuel 1-D 100 F.... acetone 0 F.....benzene 12 F

RacerHog

That was burnt out before it got started....

RacerHog

Really? Ok... So thats what makes it harder to start? Hummmm...

moe7404

the flash point is the point at which the fuel will ignite. if you have diesel in a cup at 50 degrees. you can not light it with a flame. the special jet fuel in the SR-71 has a flash point of 140 F, and boiling point 550 F. cause the body of the SR-71 is 500 F at full speed.

RacerHog

Ohhhhh... Got it.... Your working on a SR-71 with a hard start problem... Why didnt you just say so? The AFB Or AVS might be running to rich for that altitude. You may need to lean the fuel out because their is not enough air going threw it, and it's blowing out the flame? Get out your Belarc advisor, and trace the protocalls....Check the heater while your there. Might be too cold...

moe7404

NO NO NO iam to young to have worked on the SR-71. LOL LOL the SR-71 has a special cone at front of the engines to drop the air speed down so it does not over pressure the engine. that moves in and out with the air speed. at mach 3 the air pressure is very high. much faster than your Hemi Cuda. LOL LOL

RacerHog

Why does it have to be a Cuda?......lol
It's was a Challenger...That car is Long gone now..... Shipped it off to Japan...
Now I wished I had kept it..... But I put a nice down payment on a house with the money...
Oh and it was never hard to start,,,,,

moe7404

i was thinking about the 1968 HEMI Cuda. dont for get chrysler didnt use the name Cuda untill the 1968 HEMI cuda. the other "A" bodys was called barracuda. then the "E" body was called Cuda. and the Challenger was a very cool car to.

RacerHog

So it was a B,A,E, Is that what your telling me? on that one....

Gorts 5th

I suggest leaning out the carb I had a lot of ethinal issues hard starting boil overs vapor lock (fixed it ...with sealed fuel system. And thermol spacer.) On my 650 avs I leand out the primaries 8% and the.secondaries 12%
also no real initial advance factory set. experimented with mechanicle advance curves
also my car sits.for days at a time and I find the fuel in the carb is evaporated away.

440roadrunner

These are dual fuel vehicles. You have to start them on petrol and then switch over to the main tank on distillate when warmed up a bit

moe7404

to gorts 5th how do you know you did 8% and 12%? that is a lot. AFBs go by diameter.