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Title: DIY piston notching Post by: Peter on January 29, 2015, 17:13:41 pm Hi,
did somebody try this allready? I dont want to wait ages for the machine shop and do it myself. KR, Peter Title: Re: DIY piston notching Post by: spanners on January 29, 2015, 17:25:12 pm Crane cams supply notching valves.
Title: Re: DIY piston notching Post by: flatfire on January 30, 2015, 09:29:42 am These guy did it in house. ;D :o
http://youtu.be/PQIr84V1DPc (http://youtu.be/PQIr84V1DPc) Title: Re: DIY piston notching Post by: Taylor on January 30, 2015, 10:22:48 am These guy did it in house. ;D :o http://youtu.be/PQIr84V1DPc (http://youtu.be/PQIr84V1DPc) Well there you go. Done and done!!!! Title: Re: DIY piston notching Post by: Griebel on January 30, 2015, 10:24:55 am Toolbit or even a bit of an old file brazed to a valve,-tried it back in the stoneage,-no problem ;)
https://books.google.dk/books?id=OM4-ERrV8XwC&pg=PA114&lpg=PA114&dq=piston+notching%2Bhot+to+hod+rod+vw&source=bl&ots=QJQ1uRoPGN&sig=Wd_oxImMbi9PL5iKr-mc8sh8UTw&hl=da&sa=X&ei=mkvLVNfcE8XzUMqvAQ&ved=0CCMQ6AEwAA#v=onepage&q=piston%20notching%2Bhot%20to%20hod%20rod%20vw&f=false (https://books.google.dk/books?id=OM4-ERrV8XwC&pg=PA114&lpg=PA114&dq=piston+notching%2Bhot+to+hod+rod+vw&source=bl&ots=QJQ1uRoPGN&sig=Wd_oxImMbi9PL5iKr-mc8sh8UTw&hl=da&sa=X&ei=mkvLVNfcE8XzUMqvAQ&ved=0CCMQ6AEwAA#v=onepage&q=piston%20notching%2Bhot%20to%20hod%20rod%20vw&f=false) Title: Re: DIY piston notching Post by: Griebel on January 31, 2015, 12:05:21 pm Just recieved this picture from my partner in crime, Mr.J.Elnef,-this is the actual valve we used back then (before hi-tech milling ;)).Used it on Elnefs first 2.4 8))..ps.: remember to do a backcut to the center !(http://i.imgur.com/wdfNX9O.jpg)
Title: Re: DIY piston notching Post by: Frallan on January 31, 2015, 19:18:51 pm (http://i153.photobucket.com/albums/s207/Frallan2/lobster034_zpsnzvd1fvj.jpg~original) (http://s153.photobucket.com/user/Frallan2/media/lobster034_zpsnzvd1fvj.jpg.html)
(http://i153.photobucket.com/albums/s207/Frallan2/lobster033_zpsa5a6gscc.jpg~original) (http://s153.photobucket.com/user/Frallan2/media/lobster033_zpsa5a6gscc.jpg.html) My nice little set with many different spindles. http://www.lindytools.com/#!cuttersandtools/c13ps Nice company to deal with. Title: Re: DIY piston notching Post by: spanners on January 31, 2015, 20:13:30 pm Love that gear, Far better tools,^^^^^**** I did it the old way with home made cutters way back, but modern forged alloy is so tough, it will just dig in and break something or other, I admit to die grinder work on pockets, sometimes you just gotta go racing, but it's then you realise how tough quality Pistons are, it's hard as nails, the old brazed up cutter will just dig in and wreck something, Do it right and cry once eh? (http://My nice little set with many different spindles. http://www.lindytools.com/#!cuttersandtools/c13ps Nice company to deal with. [/quote) Title: Re: DIY piston notching Post by: Frallan on February 01, 2015, 09:38:08 am [/quote] Love that gear, Far better tools,^^^^^**** I did it the old way with home made cutters way back, but modern forged alloy is so tough, it will just dig in and break something or other, I admit to die grinder work on pockets, sometimes you just gotta go racing, but it's then you realise how tough quality Pistons are, it's hard as nails, the old brazed up cutter will just dig in and wreck something, Do it right and cry once eh? [/quote] Spanners, I do not know how you did that???...... but above is NOT a quote by me. Look like you are answering inside my quote? Title: Re: DIY piston notching Post by: dragvw2180 on February 01, 2015, 15:43:25 pm Frallan I like those tools and watched all their videos , thanks.
Title: Re: DIY piston notching Post by: Peter on April 16, 2015, 12:23:53 pm Hello!
So... mocked the motor up to check the clearance: I used the clay method again and got 3.3 mm for the intake.. still gotta do the exhaust, but my guess the clearance there is more.. So I read you need at least 0.08" for the intake...I measured 0.13", sounds OK, Can somebody confirm this? Thanks, Peter Title: Re: DIY piston notching Post by: nicolas on April 16, 2015, 18:44:42 pm Hello! So... mocked the motor up to check the clearance: I used the clay method again and got 3.3 mm for the intake.. still gotta do the exhaust, but my guess the clearance there is more.. So I read you need at least 0.08" for the intake...I measured 0.13", sounds OK, Can somebody confirm this? Thanks, Peter looks OK to me. , just don't float your valves ;D ::) i have 1mm between the piston top and the head (the deck in the pistons is just 1mm) and that works. maybe not completely comparable because the head is static and the valve obviously not Title: Re: DIY piston notching Post by: Peter on April 16, 2015, 18:53:52 pm piston to head clearance is ok,
I set it at zero deck and a 0.06" copper gasket. Its just the clearance to the valves I am a bit worried about Title: Re: DIY piston notching Post by: dangerous on April 16, 2015, 21:51:28 pm .130" is heaps of room for the inlet.
The exhaust is the one that will need the room. I like to use soft springs and a dial indicator on the retainer, so I con push down to measure the clearance accurately. Most people will tell you .060" inlet and .100" exhaust, but with good springs, and stable cam profile, I have been able to get away with .030" inlet and .060 exhaust Title: Re: DIY piston notching Post by: Peter on April 16, 2015, 23:26:09 pm thanks a lot for the advice!
turned out my exhaust is at 0.2" no worries then! :) |