Author Topic: 660 2 piece head  (Read 263 times)

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Offline mdavlee .

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Re: 660 2 piece head
« Reply #10 on: February 28, 2017, 02:41:13 pm »
How is that goin? It looks hot,any problems yet,or how high is the output?
I got this head finished up. If I don't get called to work this week I hope to hear it run by the weekend.



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Offline Cut4fun

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Re: 660 2 piece head
« Reply #11 on: March 01, 2017, 01:42:09 pm »
You doing a hotsaw or stock appearing build? Funny fuel or gas racesaw?

See the wiseco stuff in background that Chris is selling in another pic.  You go with 62mm?

That 62 is a sweet looking piston. I was scared as heck that I would drop it looking it over.
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Offline mdavlee .

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Re: 660 2 piece head
« Reply #12 on: March 01, 2017, 02:31:21 pm »
Hot saw is my end goal. Pump gas for now. Hopefully it will end up piped and maybe later I'll switch to alky.
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Offline HolmenTree

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Re: 660 2 piece head
« Reply #13 on: March 01, 2017, 03:09:18 pm »
Nice looking project. What kind of reeds are you putting in it?

I was thinking you may want to loc tite studs into the crankcase and use aluminum lock nuts on top.
I was at a contest in 1989 and was helping out a competitor fix his two Marcel Vincent built 084 and 090. The 090 lean seized and the 084 was starting to. Found out the saws had long cap bolts like yours and weren't staying tight. Crankcase threads were giving out from a couple of removals. So we fabbed up 4 new studs with nuts.
Making a living with a saw since age 16.
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Offline Cut4fun .

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Re: 660 2 piece head
« Reply #14 on: March 01, 2017, 03:17:54 pm »
My 4ci 262 would do that. Heck during a test run it was going lean and I caught it on video. When I checked it the cylinder had come loose like you say Willard.
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Offline Cut4fun .

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Re: 660 2 piece head
« Reply #15 on: March 01, 2017, 03:22:50 pm »
After 2nd 3rd cuts you can hear where the cylinder bolts had come loose that ran through the 2 piece head.

https://youtu.be/d_cGXC1qGHc
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Offline mdavlee .

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Re: 660 2 piece head
« Reply #16 on: March 01, 2017, 06:27:53 pm »
Nice looking project. What kind of reeds are you putting in it?

I was thinking you may want to loc tite studs into the crankcase and use aluminum lock nuts on top.
I was at a contest in 1989 and was helping out a competitor fix his two Marcel Vincent built 084 and 090. The 090 lean seized and the 084 was starting to. Found out the saws had long cap bolts like yours and weren't staying tight. Crankcase threads were giving out from a couple of removals. So we fabbed up 4 new studs with nuts.
I have some longer bolts ordered so I can use all threads in the case. I may go to studs if these give problems when I add lock washers. Hadn't planned to actually run it yet but I couldn't resist when I got the carb on. I don't know what reeds it actually has in it. Look like Boyeson that's on ebay. It's a 6 petal set up.
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Offline Cut4fun .

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Re: 660 2 piece head
« Reply #17 on: March 01, 2017, 06:46:47 pm »
129.87cc 62mm - 43mm call her 130cc
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