372xp big bore kit..do i or dont i.

[Stubby]

On these ported 372 BB's, there is almost no limit to how far you can open up that muffler.

 

This one has a bark in him ! Spud ported of course

[spudulike]

This one has a bark in him ! Spud ported of course

 

Mmm, that was a REALLY loud saw, even gained a complaint and some admiration when I fired it up in the front garden:lol:

[wyk]

I hear ya. Nice work, Spud!

 

Guess I get to post my muffler, too. It ain't pretty, tho

 

This is how it came on my 385XP. I only added the two front ports in the bracket:

 

 

Side view:

 

[wyk]

Found a video of the noise the thing makes: [ame=http://www.youtube.com/watch?v=klPIIyEkAGE]Stumping a 32" Sycamore with a ported 385XP. - YouTube[/ame]

[spudulike]

Is it back together yet? Get the wife to pull it over, sure she won't mind:blushing::lol:

[wisecobandit]

Yup got it back together yesterday and fitted a 2nd port (1") in the unbaffled muffler I had. Stuck the comp tester and tried to pull it over and lots of compression. Cant say exactly as 4 pulls it was at 170psi before I was doubled up in pain.

Stuck the plug in and an hour later braved it to pull it again. Popped 1st time and fired up on the second. Needed a tweak on the carb unsurprisingly but feels a bit of a ripsnorter but who knows til it hits wood.... it may shoot me down in flames lol but im quietly confident I will be happy with the result.

[wyk]

Did ya install it without the gasket? MCW tells me these things will usually pull close to 180 without the bottom gasket.

[wisecobandit]

Did ya install it without the gasket? MCW tells me these things will usually pull close to 180 without the bottom gasket.

Whats a base gasket

Left it out as you probably guessed.

[wyk]

Excellent. I may be getting a pop-up added to this piston of mine. Which reminds me, I don't have a compression tester in Ireland. Anyone got a good idea for a source for one?

[wyk]

Well, looks like I'll be adding more exhaust timing and more transfer work - the piston is on it's way: