M sounds lame

Docs69 · Jul 17, 2010

The old M that I'm restoring has never sounded as good as I thought it should. Is it the muffler or manifold or both? It has the typical Tractor Supply muffler. The 300 we have has the same muffler but sounds great. Any ideas?
Thanks

DeltaRed · Jul 17, 2010

does it have an inner baffle?ram it out,then it'tle sound good.

Thomas Keiber · Jul 17, 2010

i have seen a lot farmalls with a glass pack muffler they sound good.

armand tatro · Jul 17, 2010

Lame? Define lame! What work have you done to the engine beside the manifolds? What is the compression? Have you had the tractor on a dyno? No amount of straight pipes, glasspaks, or open mufflers is going to make an engine sound good unless it has been tuned on a dyno AFTER your engine work has been completed. Also the engine should be checked again AFTER it has been worked under load to seat the rings and valves have been readjusded and other minor adjustments have been rechecked. The Tractor Vet and others will no doubt have some other ideas about this as well. Armand

D Slater · Jul 17, 2010

Without any details on the engine or manifold you have. My best guess is the 300 has a higher compression, different ignition timing and different valve timing compared to the M. M engines equiped with higher compression and distributors with a slower and less total advance seem to have more of a bark sound out the exhaust. Also a later replacement camshaft will change the sound some.

M sounds lame

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Docs69

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