???Nutter Bypass??? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 10-22-2002, 09:40 PM
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???Nutter Bypass???

Look i hear so much stuff on the nutter bypass but the one think i can't figure out is exactly what is is used for. What does it do to improve performance. What are the aplications. What is it? I'm sorry fo asking such a question. I know there is so many posts about this but i still have no idea what it definitely is.
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post #2 of (permalink) Old 10-22-2002, 09:59 PM
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Re: ???Nutter Bypass???

Well it's basically a "redneck" fix for the computer controlled Carter BBD carburetor.
By bypassing the computer (which usually controls spark advance, fuel/air mixture, etc.), you're effectively eliminating any computer control on the carburetor making it run in a way similar to the way yours does.
This way you can tune the carb to your liking, and set the timing without having to worry too much about what the computer is doing.
Some people also nutter their engine so they can remove the rats nest of vacuum and vapor lines in the engine bay.

It's used on the computer controlled 258's which I believe (may not be right) were put into production in the early 80's, perhaps around 82.
It doesn't necessarily improve performance on every 258 it's done to. There are some people who see an improvement, and there are others who don't.
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post #3 of (permalink) Old 10-22-2002, 10:04 PM
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Re: ???Nutter Bypass???

Thank You on a job well done.
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post #4 of (permalink) Old 10-24-2002, 06:54 PM
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Re: ???Nutter Bypass???

What he said....

It doesn't actually fix anything unless your computer parts like the computer controlled carb enrichment and things like that are getting old and worn out. Then it just makes them not do anything any more, not fix them.

Other than computer related stuff, it does not *fix* anything. If there is something wrong with the carb, ignition system, or wiring, it will not fix that. It just takes the computer out of the loop.

Best regards

truckjohn is offline  
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