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Leaning fuel on carbeurator.....HELP
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dekocards90 Offline
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Post: #1
Leaning fuel on carbeurator.....HELP
Hello everyone I will soon be putting my generator on my 1985 chevy dump truck with a 350 carburetor engine. I have much experience with building and installing generators, it's common to see doubled mpg on V8's but what should I expect on a carburetor, should I set back the idle to lean fuel if so how much for a 1.8lpm unit? Thank you!
05-25-2009 03:48 PM
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firewheel56 Offline
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RE: Leaning fuel on carbeurator.....HELP
hi. from working with carbuertor engines i have used a adjustable fuel pressure reguiator that is vaccum controled. if you lower fuel pressure you are lowering the fuel level in carb. which will take more vaccum to draw into the engine giveing to leaner fuel. per say. the main reason for a vaccum control fuel reguiator is so under load the fuel is not leaned out. and not killing power.

LANDY.
05-25-2009 05:15 PM
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dekocards90 Offline
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Post: #3
RE: Leaning fuel on carbeurator.....HELP
Thank you, do you know where I can get one or howmuch they are? Also, what are gains you have seen on carburetors?
05-25-2009 05:19 PM
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firewheel56 Offline
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RE: Leaning fuel on carbeurator.....HELP
there are some on ebay under 50.00. or check auto parts shops. so you can ask and see what you are getting . you will know when you are getting to lean it may ping or run hot faster / have less power and less fuel gain. it is hard to say what the gain will be . some time when uesing a pressure reguiator it runs better because the carb was runing rich .and not from HHO. some times when we got gains like in power we use them .and offset to true gain we get that we are looking for from HHO. THANKS LANDY.
05-25-2009 05:57 PM
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Smudge Offline
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RE: Leaning fuel on carbeurator.....HELP
Heavens!
Noone told him to put the carburetor enhancer method on his carb?
If he's got the know how to build a generator
then he can surely do the carb enhancer.

Very simplified explanation:
Buy:
a vacuum hose
copper tube small enough to fit inside the carb float bowl vent
brass needle valve and nipples to fit into the vacuum hose
plastic T the size to fit into your pcv valve and vacuum hose

Cut pcv hose, install T
Drill hole in bottom of air cleaner the diameter (or slightly tighter) than your vacuum hose
Stick copper tube into float bowl vent, and vacuum hose onto the end.
Install needle valve in reachable space below air cleaner and above PCV hose.
(long enough vacuum hose and you can mount valve on fender)
Adjust valve. Too far open and you have engine skip at high rpm. Too closed and the tuning effect is eliminated.
This the simple explanation from George's Carb Enhancer book.
10-13-2009 04:34 PM
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jbalat Offline
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Post: #6
RE: Leaning fuel on carbeurator.....HELP
Isnt it easier just to go and buy a smaller set of jets ?
10-16-2009 07:53 PM
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ahsem1972 Offline
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RE: Leaning fuel on carbeurator.....HELP
If hho works and I hope it does should you not get gains on a carb engine without leaning it the reason we lean newer models we are told th 02 sensor is picking up the extra oxgen in the exhaust so we lean to keep this from happen which is what causes most of our trouble and keeps us from getting results I found me a 1984 ford escort with a diesel I can't wait to try it it will prove to me if it works or not
12-18-2009 07:21 AM
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AlexR Offline
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RE: Leaning fuel on carbeurator.....HELP
(12-18-2009 07:21 AM)ahsem1972 Wrote:  If hho works and I hope it does should you not get gains on a carb engine without leaning it the reason we lean newer models we are told th 02 sensor is picking up the extra oxgen in the exhaust so we lean to keep this from happen which is what causes most of our trouble and keeps us from getting results I found me a 1984 ford escort with a diesel I can't wait to try it it will prove to me if it works or not

Adding HHO to a vehicle with an oxygen sensor will cause the mileage to go down. An EFIE is used to compensate for this resulting in a mileage gain.

Adding HHO to an unmodified carbureted engine will not cause you to gain or lose mileage. The reason for a carb enhancer is to cut back on the fuel to allow for mileage gains from more efficient combustion.

A carb enhancer helps the carburetor to operate more efficiently. Significant gains can be achieved with only a carb enhancer installed.

the 1984 diesel you have sounds like an excellent vehicle for HHO. I believe you won't have to mod that engine at all, just add the HHO to the intake and the engine will adjust itself!!

Alex

Cool Flame, LLC
http://www.cool-flame.com
12-18-2009 06:48 PM
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