instigator

maybe frogs wouldnt bump there a$$ if they had wings. look, what i said shouldnt have caused a big heartache if it did so be it. as far as the respect thing, there is not one sole on this internet that deserves my respect, untill ive met the person, and that means you too blue but i do show some curtousy(sp) to others and what i said to gadget doesnt cross the line., if ot did for him he coulda just pm'ed me and discused it thata way

now back to the heat exchanger thread

MudYota

which airline you work for?? can you get me a job?? yes i have my A&P .


Jason

instigator

just pm'ed ya mudyota. hang in there

Duffdog

has anyone thought about running the fuel line next to the exhaust??? i mean, its right there--you cant get much hotter than that can ya? I'm sure there is some way to create some sort of armor that would prevent problems in an accident. Does anyone think that running a solid metal line next to the exhaust is viable? If it is-=--whomever created a working model of this could then patent it and sell it to the automakers. The problem i have with some sort of electric "heat exchanger" is that it requires power to run it, being from the alternator, which comes from the crank, which comes from your gas tank. Using parasitic heat which is expended anyways to increase efficiency would not require the addition of any systems that require power to operate!!!

any M.E. people out there know much about this?

Tim

MudYota

Ok let me start by saying that running a metal tube fuel line anywhere near you exhaust is bad news. think about how hot the exhaust really is. now let me go into a personal experience with a buddies car.

1983 GT with a 302, car runs well. He ran 1/2" solid fuel line aprox. 1.25"s away from the right header bank. from there it went to the pressure regulator and then to the carb. problem he was having is the exhaust was heating the fuel line and after the car got up to temp(around 15 min.) the fuel was actually vaporizing inside the line. it then vent as a vapor to the regulator which is designed to control fluid not a gas. he was experieincing problems with the car surging so one day we got underneath and looked at the fuel line and the line had actually been turned a blue color form the heat in about a 6" length near the header.

if i had to run anytype of heat exchanger for the fuel it would be one that i could control the amount of heat the fuel was recieving befor it went to the carb or injection system. now i am sure there is a way to run it close enough to heat the fuel and not cause vapor locking inside the line but why try to risk it?



Jason

flecker

Why not use the coolant in some way??? wold that get hot enough Maybe a line run from the radiator to a solid core of some sort just to create a heat source? Then run the fuel line through that I am no genius But maybe?

cstary

the way Gadget told me he did it was to unhook the coolant lines to the TB, and use that as a source for heat. he wrapped copper tubing around a larger tube which had the coolant passing through it, and passed the fuel through the copper tubing. he then wrapped the whole thing and the fuel rails in insulation.

he did one other thing that makes the whole operation tricky: he relocated the FPR (fuel pressure regulator). the fuel pressure in the rail is a lot higher with the fuel heated, and you would lose too much fuel through the fuel return line, so you have to relocate the FPR to a spot before the heating occurs. now this either takes a little machining to come up with a plug for the fuel rail where the FPR was, or you need another FPR (and just block off the fuel return line on the fuel rail FPR). this is the trick that's kept me from doing it. i finally found another FPR that should work, so now it's a matter of machining an insertion point for the new FPR site.

another question i had was: is it OK to relocate the FPR? i always thought that the idea of a fuel rail with the FPR at the end of flow was to create a manifold effect - so you get equal distribution of pressures at all 6 injectors. would removing the regulation of pressure from the end of the path change that?



creed

HaveBlue

That's the same method I used only I modified it a little. Rather than heating the fuel from the primary line, I heated the fuel from my Fuel Atomizer. Consequently, I gained another .5 MPG in town and 1.2 MPG on the highway.
I bought a couple spare radiator hoses, cut one of them, inserted a piece of copper pipe (2" OD if I remember correctly) and wrapped approximately 5 feet of 3/8" copper tubing. I double clamped each end of the copper pipe to insure no coolant leaked. I then attached the vapor hose from the Fuel Atomizer to one end of the copper tubing and fuel line form the other end of the copper tubing to the PCV inlet on the S/C. The atomized fuel from the Fuel Atomizer still ends up in the same place, it just takes a heated detour.

midiwall

Any pictures? It would help to get a visual on how you routed everything and tied it all down.