Year end build

[farminkarman]

Hopefully it helps...

Carb, intake, porting etc
View attachment 361817

Joe, did you leave the upper transfers alone, or did you raise them a bit? Looks great btw!

 

[Red97]

Joe, did you leave the upper transfers alone, or did you raise them a bit? Looks great btw!

Thank you

Everything is raised. As assembled it was

80
109
126

 

[Red97]

Found a wee bit more. About as I expected, the fingers seem to add a "hit" up top. But should make a dandy 60cc firewooder.

 

[Shane¹]

View attachment 361847

Found a wee bit more. About as I expected, the fingers seem to add a "hit" up top. But should make a dandy 60cc firewooder.

That looks pretty strong!

 

[Red97]

That looks pretty strong!

Thank you.

 

[Red97]

Vs the stock 357.

 

[slackinoff]

@Red97 - Wow! That's an awesome result. I was glad to read you kept going on this one.

 

[Maintenance Chief]

View attachment 361847

Found a wee bit more. About as I expected, the fingers seem to add a "hit" up top. But should make a dandy 60cc firewooder.

Don't you mean 70cc? Lol
Make firewood faster for sure!

 

[Red97]

Don't you mean 70cc? Lol
Make firewood faster for sure!

You weren't supposed to catch that. Nobody will know...

 

[Ketchup]

View attachment 361847

Found a wee bit more. About as I expected, the fingers seem to add a "hit" up top. But should make a dandy 60cc firewooder.

That’s a huge improvement! The torque curve is especially impressive.

I suffered a major setback on mine. I set it up for port work last night. Stock numbers are 76/98/112. I doubt I can drop those transfers enough. Very unhappy with the Hyway jug.

 

[Red97]

That’s a huge improvement! The torque curve is especially impressive.

I suffered a major setback on mine. I set it up for port work last night. Stock numbers are 76/98/112. I doubt I can drop those transfers enough. Very unhappy with the Hyway jug.

Hmmm.....

What piston/setup did you use?

 

[Ketchup]

Hmmm.....

What piston/setup did you use?

064 piston. 0.040” out of the band and 0.080” off the crown put me at .025” with 2 gaskets. If I keep going with this jug I’ll take more out of the band and try a 038 magnum piston.

It has other problems though. The uppers have a lousy exit angle and the plating is flaky AF.

I’m not happy with my workmanship either. I went too fast.

 

[Red97]

064 piston. 0.040” out of the band and 0.080” off the crown put me at .025” with 2 gaskets. If I keep going with this jug I’ll take more out of the band and try a 038 magnum piston.

It has other problems though. The uppers have a lousy exit angle and the plating is flaky AF.

I’m not happy with my workmanship either. I went too fast.

Seems the 038 piston is the way to go with these. I would happily shave another .020 off the piston starting over on this one.

I feel ya. Mine is rather rough around the edges and piles of "modified" junk left in the wake... trying to stay focused and making projects like these happen I tend to run through lots of parts trying to find the "just right" pieces.


I have had the best luck with the bottom of the barrel 20$ eBay white box kits.

 

[farminkarman]

Seems the 038 piston is the way to go with these. I would happily shave another .020 off the piston starting over on this one.

I feel ya. Mine is rather rough around the edges and piles of "modified" junk left in the wake... trying to stay focused and making projects like these happen I tend to run through lots of parts trying to find the "just right" pieces.


I have had the best luck with the bottom of the barrel 20$ eBay white box kits.

Just curious, why do you think the 038 mag piston is the best?

 

[Maintenance Chief]

Seems the 038 piston is the way to go with these. I would happily shave another .020 off the piston starting over on this one.

I feel ya. Mine is rather rough around the edges and piles of "modified" junk left in the wake... trying to stay focused and making projects like these happen I tend to run through lots of parts trying to find the "just right" pieces.


I have had the best luck with the bottom of the barrel 20$ eBay white box kits.

I'm gonna set at .019 squish for my 625/272 build, I like the torque numbers yours were sitting at.
I got a used oem p/c from Bob when he had his retirement sale.

 

[Red97]

Just curious, why do you think the 038 mag piston is the best?

About the shortest pin to crown height with Windows. And keeping ok skirt width. I believe the 046 is the same height as the 38

I took .060 from the band and .010 off the piston and still had to run a gasket. Dolmar 7900 piston may save some machine work too bit rather limited skirt width. These shorter strokes need to be able to have wide ports.

 

[farminkarman]

About the shortest pin to crown height with Windows. And keeping ok skirt width. I believe the 046 is the same height as the 38

I took .060 from the band and .010 off the piston and still had to run a gasket. Dolmar 7900 piston may save some machine work too bit rather limited skirt width. These shorter strokes need to be able to have wide ports.

I see what you mean.

460 piston has coated skirts, and 038 is bare.

 

[Red97]

I see what you mean.

460 piston has coated skirts, and 038 is bare.View attachment 361906View attachment 361907

I was pleasantly surprised when I got some readings close to that...

 

[farminkarman]

Here is a look at an OEM 272 jug vs. a meteor:
The OEM transfers blow much harder back toward the intake than the meteor. I will probably mock mine up with the meteor first and then modify & use the OEM jug.

 

[Ketchup]

Here is a look at an OEM 272 jug vs. a meteor:
The OEM transfers blow much harder back toward the intake than the meteor. I will probably mock mine up with the meteor first and then modify & use the OEM jug.View attachment 361910View attachment 361911View attachment 361912View attachment 361913

My Hyway jug has that exact transfer issue. Near perpendicular exit angle. I have a nice oem jug, so I may just start over on that one.