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 Need Some Tips On Shaving The Eyebrows On A 5hp Flathead

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Marines2621
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PostSubject: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 16th 2013, 2:19 pm

I Got My 5hp Racing Motor And I Need Some Tips On Shaving The Eyebrows And How Deep I Should Go?? I Am Also Only Gonna Port The Intake Port Out Cause Most Racers Say Thats All That Needs To Be Done
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Doc Sprocket
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 16th 2013, 5:37 pm

I'm no guru, but the mixture and gasses flow in both directions, which is why I did both ports. To be fair, I am eliminating the head gasket, which is equivalent to decking it by quite a bit. While this raises compression, it reduces flow in an L-head. The eyebrow job compensates for this.

In my logic, I needed to remove at least as much material as the thickness of the gasket I eliminated. I actually went slightly deeper than I had to, but I got a nice smooth level surface out of the deal, and STILL didn't get down flush with the valve seats. I removed a total of about 0.070". Just shy of that, really.

Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Honed10

Suggestions? Yeah- use a dremel with a flex shaft, and TAKE YOUR TIME. Work slowly, and let the tool do the work. Don't apply much pressure at all, let the bit float. Think as if you're sanding, not grinding. I did most of the work with those little garnet sanding drums that go on the rubber cylindrical arbor. Use a straight edge to check progress off the deck, and remember to de-burr the cylinder liner after you do that edge. Don't go any deeper at the liner, than the top of the upper compression ring. The last thing you want is to hang a ring. Be incredibly careful not to hit either valve seat, and save lapping the valves until after this process is done. Do this only on a completely stripped down block, and wash the hell out of it after you're done.
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Marines2621
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 16th 2013, 8:38 pm

Thanks For The Info On This. I Really Do Appreciate it alot
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Doc Sprocket
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 16th 2013, 8:45 pm

Anytime.
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Marines2621
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 16th 2013, 9:03 pm

Tore Into The Motor And Figured Out The Block Has Been Decked 0
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 16th 2013, 9:27 pm

Oh? Got pics? What did you find?
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Marines2621
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 19th 2013, 5:25 pm

Here Yah Go. Its Finished

Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Img_1710

Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Img_3711

Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Img_0510
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Doc Sprocket
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 19th 2013, 5:59 pm

Looks pretty good! Which method did you use?
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Marines2621
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 20th 2013, 12:04 am

I used a diagrinder with many different bits. Then took really fine sand paper and sanded some which brought it unbelievely smooth. Took my time and it worked great!!
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Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Empty
PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitimeDecember 20th 2013, 1:23 pm

Nice work!  Cool 
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PostSubject: Re: Need Some Tips On Shaving The Eyebrows On A 5hp Flathead   Need Some Tips On Shaving The Eyebrows On A 5hp Flathead Icon_minitime

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