The Ford Barn

Straightpipes · 08-20-2011, 11:24 PM

Quote:

Originally Posted by John Kennedy

I think I'll go L100 when I'm ready, with adjustable lifters. Any drawbacks to adjustable lifters?

You have to know that the L-100 is a regrind which leaves the base circle of the lobe smaller in diameter. This leaves your lifters setting lower in the block. With adjustables it will be very difficult to set them. I drilled the lifter bores so that I could pin the lifter in place to set it. Works well.
If you don't use adjustables your valve stems will be too short. Some guys use Chebbie valves.

Bassman/NZ · 08-21-2011, 06:10 AM

Back in the days when flatties were raced a lot, adjustables were next to impossible to get here in NZ, so the valve stems were lengthened by adding brazing, then painstakingly grinding them down until they were the correct clearance.

Ol' Ron · 08-21-2011, 10:00 AM

The use of chevy valves is an easy out, however while up at Walts I saw a fixture built by Craig Beers that makes welding the stems quite easy. Thus you can use stock lifters with any cam. Lets face it ALL cams are re grinds except for special billet cams like rollers. The reason for this is the fact that the cam bearing diameter restricts max lift.

Ol' Ron · 08-21-2011, 02:16 PM

Back in the "Old days", Mellings made 3/4 and full race cams with stock base circle. They made cores and ground them as replacements. Most of these un ground cores have been used up along time ago. New un ground cores are very expensive.

Tim Ayers · 08-21-2011, 03:30 PM

Quote:

Originally Posted by Ol' Ron

Back in the "Old days", Mellings made 3/4 and full race cams with stock base circle. They made cores and ground them as replacements. Most of these un ground cores have been used up along time ago. New un ground cores are very expensive.

Yep, this is true.

I'm happy to have found a NOS Full Race Melling. It is still in the original box. Found it a Hershey a few years back.

Pete · 08-21-2011, 04:00 PM

Sponsored Links (Register now to hide all advertisements)

I think I will run a gas turbine next time.
NO camshaft, crankshaft or pistons to worry about.

Bassman/NZ · 08-21-2011, 05:07 PM

Quote:

Originally Posted by Pete

I think I will run a gas turbine next time.
NO camshaft, crankshaft or pistons to worry about.

Blasphemy! Heretic!

08-21-2011, 06:10 AM	#22
Bassman/NZ Senior Member Join Date: May 2010 Location: Napier, New Zealand Posts: 2,001	Re: Camshafts Back in the days when flatties were raced a lot, adjustables were next to impossible to get here in NZ, so the valve stems were lengthened by adding brazing, then painstakingly grinding them down until they were the correct clearance.

08-21-2011, 10:00 AM	#23
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,855	Re: Camshafts The use of chevy valves is an easy out, however while up at Walts I saw a fixture built by Craig Beers that makes welding the stems quite easy. Thus you can use stock lifters with any cam. Lets face it ALL cams are re grinds except for special billet cams like rollers. The reason for this is the fact that the cam bearing diameter restricts max lift.

08-21-2011, 02:16 PM	#24
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,855	Re: Camshafts Back in the "Old days", Mellings made 3/4 and full race cams with stock base circle. They made cores and ground them as replacements. Most of these un ground cores have been used up along time ago. New un ground cores are very expensive.

08-21-2011, 04:00 PM	#26
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,407	Re: Camshafts Sponsored Links (Register now to hide all advertisements) I think I will run a gas turbine next time. NO camshaft, crankshaft or pistons to worry about.