fuel vaporization.
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Elder User
Joined: Nov 2004
Posts: 726
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From: So. California
fuel vaporization.
In a liquide gasoline engine fuel theoretically does not always mix well with the air and is said to fall out of suspension in the plenum creating unequal and inconsistant fuel mixtures. I would like to vaporize my gasoline. I wonder if by heatin my intake hot enough I could vaporize the fuel completely into the air so the mixtures accross the cylinders would be more consistant. The might not be need for a dual plane in this application and I would just run a single plane. I understand that Smokey Yunick built an engine with a heated intake that vaproized fuel improving thermal effecinecy. Eventhough fuel is getting to be mega-bucks I am not ready to give up my v8 and pickup. Do throtel bodie injection systems atomize fuel better than a well tuned carburater?
Posting Guru
Joined: Sep 2005
Posts: 2,238
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From: Kiefer, Northeastern Okla
A cooler, denser charge makes more power. When using an aftermarket intake with older style heads with the exhaust crossover, I block them off, and do everything I can to keep the fuel lines, carb, and intake as cool as possible. The fresh fuel charge is also responsible for cooling the intake valve. A lot of the heat is removed (transfered) when the valve is on the seat. Exhaust valves are typically made of a more heat-resistant material for this reason. Atomization is affected greatly by the design of the intake manifold, intake ports in the heads, engine rpm, and combustion chamber design. Velocity is the key. Higher intake charge velocities not only prevent the air-fuel mixture from falling out of suspension, it also promotes better cylinder filling, and increased volumetric efficiency. JMO, but as far as carb vs. TPI, it's REALLY hard to beat a properly tuned carb that is matched for size and design in a high performance application. EFI has its' good points, like cold starting ability, etc. also, in a normal engine. A long read, but good points from some of the best minds in engine building today:
http://speedtalk.com/forum/viewtopic...el+atomization
Pete
http://speedtalk.com/forum/viewtopic...el+atomization
Pete
