Author Topic: Bumping up compression?  (Read 522 times)

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Offline Cut4fun .

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Re: Bumping up compression?
« Reply #10 on: March 06, 2014, 03:35:53 pm »
Thats what I liked about Dozerdan porting  (member here). He turned the base down where you could use OEM base gasket and adjusted all the porting on the cylinders to do so.   
Loved running his saws.
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Offline Playinwood

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Re: Bumping up compression?
« Reply #11 on: March 06, 2014, 04:43:57 pm »
the way it should be, all my ported saws have original base gasket installed.

and adjusted porting, transfers and timing.... ;)

Offline Al Smith

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Re: Bumping up compression?
« Reply #12 on: March 06, 2014, 08:26:58 pm »
I'm not an affectionato of gasketless assembley myself .Of course I have a lathe too which not all do .However at the moment it's not operational and as such I've not built a modified engine in some time .

Offline aclarke

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Re: Bumping up compression?
« Reply #13 on: March 06, 2014, 09:15:03 pm »
All, what's wrong with the Monarch ee?

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Re: Bumping up compression?
« Reply #14 on: March 07, 2014, 12:32:35 am »
I have put together a lot of my saws with yamabond 4 and no base gasket.   I have not seen any problems from doing so.   
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Offline Al Smith

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Re: Bumping up compression?
« Reply #15 on: March 07, 2014, 04:14:47 am »
Adam .That old Monarch has a tube type DC drive which is giving me fits .I've went completely through it to no avail .It works but I have no control over the RPM's .

About 2-3  months ago I bought a sold state controller for it but I haven't had the time to work on it .Besides it's way too cold to be freezing my butt off in an unheated building .With any luck maybe mid April I'll get on it .

Offline aclarke

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Re: Bumping up compression?
« Reply #16 on: March 07, 2014, 09:15:24 am »
Al,  in the process of putting a VFD on my Colchester Lathe. Looks like an easy install. Looking forward the variable speed

Offline rayvil01

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Re: Bumping up compression?
« Reply #17 on: March 07, 2014, 01:38:35 pm »


Paper gaskets in this country come in different thicknesses as does annealed 110 copper shim stock but you must cut your own.

When you do use the annealed copper, are you using it a a single gasket to make the gasket?  Or are you using in addition to a paper/fiber gasket?    If you are doing that is there a preferred stacking order?  Paper on the base and copper above?  Thanks.

Pricey stuff.  Having a collection of various thicknesses  would be an investment. 

Offline Cut4fun .

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Re: Bumping up compression?
« Reply #18 on: March 07, 2014, 01:58:14 pm »
I've only lost 1 piston do to a gasketless build using sealer.   Wasnt a saw I did and took on trade.
 Kept noticing  running odd at times and seemed to have carb adjustment issues. Tried a known good carb swap and samething. Dug deeper and it was a sealer giving out at base gasket area.

I have never had any problems using sealer for crankcase gasket, base gasket, or sealing tank halves that I have applied myself.  But I still prefer a gasket for base, but use sealer when needed.

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Re: Bumping up compression?
« Reply #19 on: March 07, 2014, 04:45:30 pm »
I've only lost 1 piston do to a gasketless build using sealer.   Wasnt a saw I did and took on trade.
 Kept noticing  running odd at times and seemed to have carb adjustment issues. Tried a known good carb swap and samething. Dug deeper and it was a sealer giving out at base gasket area.

I have never had any problems using sealer for crankcase gasket, base gasket, or sealing tank halves that I have applied myself.  But I still prefer a gasket for base, but use sealer when needed.



The crankcase holds what, maybe 10 to 12psi.   I think myself that a good sealer should be able to handle that easy.    Also by using a copper gasket you now have 3 metals with different rates of temperature expansion.
PP 505, 475, 445.

 

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