01-05-2013, 02:55 PM | #1 |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
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83 cylinder head mill
Does anyone have any feedback on milling the head on a 244 Robins? I'ed like to bump up the compression as much as possible to get a bit more torque. Whats the minimum piston to head clearance counting the head gasket thickness.... .040 .050 ??
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01-06-2013, 12:37 PM | #2 |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
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Re: 83 cylinder head mill
Anyone??
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01-06-2013, 01:19 PM | #3 |
Gone Wild
Join Date: Apr 2012
Location: Dansville, NY
Posts: 396
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Re: 83 cylinder head mill
The most we ever cut them was .025". That give a nice power increase.
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01-06-2013, 04:09 PM | #4 |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
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Re: 83 cylinder head mill
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01-06-2013, 04:31 PM | #5 |
Gone Wild
Join Date: Apr 2012
Location: Dansville, NY
Posts: 396
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Re: 83 cylinder head mill
You would have to take measurements to find out how much more you can take. I have a 90 3pg with .025 cut, transfer ports polished and port dividers feather edged,bv21 carb with a cold air intake,torque spring from cpp in the secondary,and comet pink spring in the primary. I run only 93 octane or above fuel at 50:1 oil mix. This engine was done 5 yrs. ago and has many road miles at full throttle. It's been just as reliable as stock and no issues with exhaust plugging. I read an article about 10 yrs ago that ezgo set these up for 128:1 because they were meant to run short distances, they ran them lean to get them to warm up quick,but for heavy use and extended run periods to run 50:1. I can't locate the article anymore, so this info will drive everyone nuts, but these engines were not designed to run that lean for heavy duty use.
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01-06-2013, 04:56 PM | #6 |
I Refuse To Get Stuck!!!
Join Date: Jun 2010
Location: Hilton,NY
Posts: 5,427
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Re: 83 cylinder head mill
Mine was stock internally,but had a cold-air intake,govenor unhooked,clutches shimmed and 22"-tires.I ran it hard for 4-yrs on 100:1(1-1/2oz.)It still runs good,I Big-Blocked it,and threw the 2pg in the corner for a future project.My plug was always tan/brown,so all was good.
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01-06-2013, 06:01 PM | #7 | |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
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Re: 83 cylinder head mill
Quote:
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01-08-2013, 07:29 PM | #8 |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
|
Re: 83 cylinder head mill
Well I ripped it apart today! The piston was new!! & in great shape! it had 120 before I started so we'll see where it lands when it's all done. Crank seals were spongy I have all the gaskets & seals coming anyways The head gasket measures .055 and it has Zero piston to deck, ,, the head has a .065 lip so I think that's gonna go I may leave .005 we'll see I'll post some more pix when I get it cleaned up and start the porting and head whack
[/IMG] [IMG][/IMG] [IMG][/IMG] |
01-08-2013, 07:48 PM | #9 | |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
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Re: 83 cylinder head mill
Quote:
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01-09-2013, 03:29 PM | #10 |
Gone Wild
Join Date: Dec 2012
Location: Warren Mi
Posts: 233
|
Re: 83 cylinder head mill
Left .010. on the head. so I took off .050 Weeeee,,,Shallll,,,, Seeeee,,
Before: [IMG][/IMG] After: [IMG][/IMG] |
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