Another Technique for Piston Notching. - Page 3 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #31 of 38 (permalink) Old 12-21-2011, 02:25 AM Thread Starter
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Re: Another Technique for Piston Notching.

WOW GT, Thank You for the feedback.

I am glad that this article got you out of a "bind" (pun intended.)

Dennis

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post #32 of 38 (permalink) Old 07-18-2012, 03:16 PM
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Re: Another Technique for Piston Notching.

Great Tech article!!

1967 mercury cougar, 302 ,5 spd, unisteer R&P, gateway front with baer 13"/T4 and maier racing leafs,rcd shocks, 12" cobra brakes and a 9" with 3:89's.
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post #33 of 38 (permalink) Old 10-26-2012, 12:27 PM
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Re: Another Technique for Piston Notching.

Quote:
Originally Posted by dennis111 View Post
(Caution: Drag race mentality.)


Admittedly I am somewhat of a risk taker in this hobby--I do much of my own work without any formal training. When I come up with an idea I actively research it and weigh the pros and cons. Then I decide on a plan of action and if it sounds feasible, I jump on it. That is the essence of true Hot Rodding--coming up with ways of doing things yourself without overextending the credit card.

Great Write up Dennis.

But I THOUGHT that was the fun part taking risks and checkin em out... Have done a few back in the day that I SHOULD have thought over more carefully, but man did I have fun for a while.... Ahhh the good ole days...

Cheap, Fast, Reliable... Pick 2...
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post #34 of 38 (permalink) Old 10-26-2012, 02:50 PM Thread Starter
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Re: Another Technique for Piston Notching.

Thank You.

You are absolutely right about the fun vs. risk part. I've certainly made many mistakes throughout the years and later thought WTF have I done. I've also taken on projects that seemed nearly impossible and the results turned out fantastic (at least in my eyes.) I learn much more when being overwhelmed than I would if all I did was "cookie cutter" work.

Dennis

65' Stang Street/Strip:



Dart 434W NA, G101A 4 Spd, 4:71 rear gear, on pump gas pushing 3550lbs. 9.97@135.13
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post #35 of 38 (permalink) Old 10-26-2012, 05:19 PM
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Re: Another Technique for Piston Notching.

I have basicly used the same method. Do have some valves made into cutters for some engines. I have sectioned up a few heads. Most are to check wall thickneses for porting purposes. But I section at least one as shown. End
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post #36 of 38 (permalink) Old 03-11-2013, 08:10 AM
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Re: Another Technique for Piston Notching.

how many piston did you notch before the sandpaper wore out
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post #37 of 38 (permalink) Old 03-11-2013, 02:45 PM Thread Starter
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Re: Another Technique for Piston Notching.

How long the 50 grit sandpaper lasts depends on whether you need to add additional radial clearance to the piston's valve pocket or just need to make the existing pocket deeper.

For this article I deepened the existing exhaust pocket with 2 sanding disks. The radial clearance was fine and so the sand paper wore evenly from its outer to the inner diameter.

I recently notched a different set of pistons for both radial clearance and depth. The sand paper wore out faster on the outer most edge because it made contact early in the process. Once I ground deep enough so that the complete valve head touched the piston, the sand paper didn't cut so well due to the worn outer edge. When I noted that, I made more effort to replaced the disks and used 5-6 disks for those 8 valve notches. If you use several small drops of super glue on the valve it will set up enough in 10-15 minutes so that you can go back to grinding.

The opposing valves had enough radial clearance and only required deepening. Just like the first time, I used only 2 sandpaper disks for those 8 notches.

Dennis

65' Stang Street/Strip:



Dart 434W NA, G101A 4 Spd, 4:71 rear gear, on pump gas pushing 3550lbs. 9.97@135.13
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post #38 of 38 (permalink) Old 12-17-2015, 02:49 AM
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Re: Another Technique for Piston Notching.

Simply just reminded me of that fun i had for a while when tuned up mine.

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