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> Carb advice
yellownerd
post May 19 2022, 12:51 AM
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Thanks in advance for your expert advice!

I’m current running a single ill performing Weber 32/36 progressive carb on my 73 1.7. Before I rip and replace it, is there anything else I should be considering? Any thoughts on dual carbs?


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brant
post May 19 2022, 07:32 AM
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The problem with a single carb is that the fuel does not stay suspended (mixed with air) in the long length of the intake runners

Remember the carbs job is to mix the fuel into mist mixed with air
The long intake causes the droplets to pool and drip out of the air mix

The fuel lnjection system only carried air without fuel in those intakes

Twin carbs with shorter intakes will always mix better…. Physics
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GregAmy
post May 19 2022, 08:01 AM
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QUOTE(brant @ May 19 2022, 09:32 AM) *

Remember the carbs job is to mix the fuel into mist mixed with air
The long intake causes the droplets to pool and drip out of the air mix

The fuel lnjection system only carried air without fuel in those intakes

Which is why - sorry, I have to say it, it's a compulsion - a properly-working stock EFI system is sooooo much moar betterer for street driveabilty on a stock-ish engine. And there's a ton of knowledge and support now for those systems, such that ripping it off and replacing with a single carb just isn't reasonable any more.

But that said...yeah, duals are much betterer than the single for overall driveability, especially in varying ambient conditions. - GA
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