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Old 02-05-2017, 02:38 PM   #1 (permalink)
oil pan 4
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Primary tube length for 305cc engine

Exactly like this : http://ecomodder.com/forum/showthrea...ine-34590.html but for a different generator.
Engine is a single cylinder 420cc Briggs and Stratton OHV engine, with 3.54 inch bore and 2.6 inch stroke that runs at 3,600rpm on my Home made solar inverter generator hybrid - EcoRenovator
The exhaust system on my 7kw generator is shaking it's self apart and in the thin air here it struggles to power a reasonable 20 amp load. It's also loud.
I would like to put on a longer exhaust pipe to optimize power, a bigger muffler to quiet it down a little since this generator's engine doesn't run unloaded much.
What would be the ideal length and diameter to maximize power?

One calculator is saying 30 inched for a 3/4 inch pipe.
Another is saying the ideal tube diameter is 1/2 inch. For practicality I'm think I am going to try to stick with 3/4 inch.

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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
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Last edited by oil pan 4; 02-09-2017 at 04:47 PM.. Reason: Put the correct engine size
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