Excess heat causing fuel evaporation issues
#1
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Location: London Ontario canada
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Car: 1986 firebird
Engine: HO 350
Access heat causing fuel evaporation issues
I have just put a HO 350 in my 86 firebird which used to have a 305. It has an edelbrock intake and carb and edelbrock headers with 3" cat back exhaust. Engine runs great on the highway and when it is cool, however on hot days in the city it will idle from at lights and bog out on take off. I have eliminated a spark issue with new plugs, wire, distributor and a new MSD box. I feel that the heat under the hood is evaporating the fuel either in the carb fuel bowls or in the fuel line that runs above the intake. I am thinking of tracking down a turbo hood with a vent, or a cowl to alow some heat to vent off, just wondering if anyone else has any ideas or have had the same problem.
Thanks
Thanks
#2
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
You could try an insulating spacer under the carb to insulate it from the heat of the manifold.
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Car: '83 Berli, '84 Berli, '84 Z28 HO
Engine: L69, LG4, L69
Transmission: TH700-R4, TH700-R4, T-5
Axle/Gears: 3.08, 3.08, 3.73 Posi
He would still have to get a cowl hood in order to run a spacer. especiaqlly if it is a 1" spacer. You will run into hitting the hood and not having enough room for an air cleaner without that extra room from a cowl
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally posted by miller626
No, fuel pump doesn't have a return line.
No, fuel pump doesn't have a return line.
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
And, I should say, factory V6 fuel line routing with the lines routed in front of the crossmember to get them over to the fuel pump. Together, these probably reduce fuel heating issues.
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Car: 86 IROC-Z, 82 z28
Engine: 383 Stroker
Transmission: TH-350
Axle/Gears: 3.73 Torsen, 4.56 Auburn
Re: Excess heat causing fuel evaporation issues
My car had this exact same problem. Mw66nova told me it was prob vapor lock so I put a stock pump back on it and it solved the problem.
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