"Run Whatcha Brung" 50CC Shoot Out ?

[Moparmyway]

Everyone should run whatever they want, too may rules = too little fun

What he said !!!!

 

[Dolmar Junkie]

Everyone should run whatever they want, too may rules = too little fun

I'll have identical bars and good identical ground chains on hand, free for anyone to use, in case there are guys who want an apples to apples heads up Armageddon death-match LOL

Now, wasn't that simple,

Gentlemen,start your engines!
And your appetites
And your story telling (see: Bologna slinging)


I'm jealous fer sure, but have a good time and stay safe...

Sorry, last derail, ever

 

[drf256]

Worked on my contestant a bit yesterday. Timing numbers off a bit (way off 91/108/64). Perhaps I shouldn’t have tried a frankensaw project as my first head saw.

 

[Deets066]

Worked on my contestant a bit yesterday. Timing numbers off a bit (way off 91/108/64). Perhaps I shouldn’t have tried a frankensaw project as my first head saw.

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There's still hope

 

[spencerpaving]

At least you don't have to work on the exhaust port much

 

[Chainsaw Jim]

Worked on my contestant a bit yesterday. Timing numbers off a bit (way off 91/108/64). Perhaps I shouldn’t have tried a frankensaw project as my first head saw.

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Are you going to run a pipe on it?

 

[drf256]

Are you going to run a pipe on it?

I may. Thinking.

 

[Onan18]

I may. Thinking.

I think I remember that a pipe likes a higher exhaust, so that may help?

 

[Cut4fun]

Bolted a MVP pipe for a 5000 on a SA 3ci saw I had and it was 30% faster cut time. Was ported for muffler.

 

[Finnrpm]

Does bagpipe count??

RV

 

[drf256]

I think I remember that a pipe likes a higher exhaust, so that may help?

It might Rabbit, it might...

Pipe software on order.

Muh ha ha ha ha ...

 

[drf256]

Got a little work done yesterday.

 

[drf256]

 

[drf256]

 

[paragonbuilder]

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Is there an optimal depth into the chamber the spark plug electrode should protrude, like perhaps even with the squish band?


Sent from my iPhone using Tapatalk

 

[drf256]

Not sure Dan. This one hits piston right now.

1cc for every 10cc of displacement is the ROT for 200 psi

Every .001 of squish in this 46mm bore = .16cc by my calculation. Squish is 12 now.

This chamber around 3.5cc presently. I should be right around 200psi.

Believe it or not, the head is likely the easiest part of the build. I’ll likely make another, as this one was made by me and Mr. Heineken. He countersunk the bolt holes, making cap screws a necessity. I wanted studs.

May run as is, get comp readings, etc, and make one or two other heads.

May pipe it as well. I can do that adding a base gasket/spacer to bring Ex roof up. And a different head.

80 off base and 10 more off piston skirt yielded 102/122/77. Much better than 91/108/64.

 

[Onan18]

80 off base and 10 more off piston skirt...

Dang bud, in it to win it aren't you?!!!

 

[RI Chevy]

Maybe just try a metal gasket?

 

[Finnrpm]

Not sure Dan. This one hits piston right now.

BMR7A might give more clearance for the piston than BPMR7A.....

BMR7A on left / BPMR7A on right

RV

 

[drf256]

BMR7A might give more clearance for the piston than BPMR7A.....

BMR7A on left / BPMR7A on right
View attachment 111946
RV

Thank you. On order.