Tuned pipe for a 640

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olyman
Global Moderator

Posts: 709

Tuned pipe for a 640 Oct 22, 2023 12:23:04 GMT via mobile

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Post by olyman on Oct 22, 2023 12:23:04 GMT

Any ideas on what existing pipes out there would work decent for a 640? I have a 640 I'm building with dual HDs, and is pretty much a 70 tnt engine inside.

I'm not so concerned to use something that is perfectly matched, just wanna have a little fun and make something work better than a can muffler.

cdem72
Moderator

Posts: 45

Tuned pipe for a 640 Feb 15, 2024 23:19:45 GMT

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Post by cdem72 on Feb 15, 2024 23:19:45 GMT

if you want something to work better than the can muffler, the tuned pipes need to be designed with port timing, volume, rpm considerations. My friend had a 775 we slapped some tuners on without adjusting the carb and we burnt the motor down. someone should be able to desgn the pipe to the motor specs to make it run well without damage.