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| | |-+ Arbor to machine GT40 heads for dual springs
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Author Topic: Arbor to machine GT40 heads for dual springs  (Read 1457 times)
David Claflin
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« on: November 25, 2012, 11:06:16 pm »

Wasn't there one made that allowed the do it yourselfer to machine their own heads for dual springs vs. having to take it to a machine shop?
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
coulterracn
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« Reply #1 on: November 25, 2012, 11:38:00 pm »

Order the applicable pilot with the size cutter you need http://www.silver-seal.com/results.cgis?catalog=&keywords=spring+seat+cutter&x=9&y=11

Pilot for 11/32" http://www.silver-seal.com/product/SL1438B/Valve-Guide-OD-Pilot-1132-for-Cutter-Body.html
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woody
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« Reply #2 on: November 26, 2012, 01:35:58 am »

They are usually cheaper at comp

www.powerhouseproducts.com
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Make sure you get your information from the internet gurus that haven't built SHIT, they did sleep at Holiday Inn last night, and we have a few of those gurus right here on this forum. Smiley
David Claflin
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Location: Redneck Riviera (Ft Walton Beach Florida)

« Reply #3 on: December 07, 2017, 01:01:39 pm »

Figured I'd follow up on this, after 5 years...LOL!!

I bought this arbor
https://www.summitracing.com/parts/CCA-4732

and this cutter
https://www.summitracing.com/parts/CCA-4733

It actually works well, did a set of heads with it. Used lots of oil, and went slow-medium speed with the drill. It started to chatter some as I was doing the last couple sets of guides. The cutter has a .560 cutter on the valve seal boss, is it still OK to use stock type valve seals? Stock valve guide boss is .575, ID of seals is .515.
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1990 Red LX, 306, 75MM, ported gt40's, Holley SMII, accufab longtubes, 3" exhaust, 4.10's, 318RWHP/316RWTQ
1985 LTD LX 302, ported TW's, XE-264 cam, ported Holley SMII, 75MM-R TB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
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