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Re: 261 Lifters
bigblack'74 #1311447 Tue May 21 2019 10:32 PM
Joined: Feb 2004
Posts: 20,330
H
Boltergeist
Regrinding a cam reduces the diameter or the base circle and can create problems with pushrod length and the position of rocker arm adjusters, locknuts, etc. If a new cam is available, getting a used one reground doesn't make good nonsense. Back when almost all the flathead Ford V8 race cams were made on stock cores with some pretty radical regrinding involved, Johnson adjustable tappets were available in "overlength" dimensions to compensate for reduced base circle diameters.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: 261 Lifters
bigblack'74 #1311469 Wed May 22 2019 02:30 AM
Joined: Dec 2017
Posts: 736
D
Shop Shark
That’s not accurate at all with respect to an in-line early chevy 6. Yes, a regrind does reduce the heal of the cam a bit in order to get the new shape ground in, but no, it does not screw up the geometry on an early in-line 6, or even close to the extent you have described. Plenty of adjustment to compensate and the regrinds work just fine. How do I know this? Because I have used at least a dozen of them over the years in my 235 and 261 builds, including a couple that Chet Herbert reground for me. You might remember his ads in hot rod magazine that he would regrind any cam with any grind for 39.50. I still have the last cam he ground for me in 1985, the receipt for that cam, and it’s still in the motor I put it in. Stock rockers, stock pushrods, stock solid lifters. Never a moments trouble, and truth be told, it was a very good cam, sounded great and ran great and I was not all that gentle with that motor. So no, I don’t agree with that pronouncement at all. A regrind is an alternative.

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Mike
Re: 261 Lifters
bigblack'74 #1311480 Wed May 22 2019 04:00 AM
Joined: Feb 2004
Posts: 20,330
H
Boltergeist
"Different strokes- - - -etc." Do you also run recapped tires?


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: 261 Lifters
bigblack'74 #1311485 Wed May 22 2019 11:06 AM
Joined: Sep 2001
Posts: 30,003
ace skiver
What does a regrind typically cost?


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE [1954advance-design.com] - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: 261 Lifters
bigblack'74 #1311492 Wed May 22 2019 01:31 PM
Joined: Jan 2013
Posts: 1,642
S
Shop Shark
I have a Delta Cams regrind in my 235, they know the 261 grinds, took my hydraulic lifter core and cut it to solid lifter 261 specs.
Valve train seems very happy now, wasn't so happy with those cheesy hydraulic lifters from abroad before though.

Last edited by sstock; Wed May 22 2019 01:32 PM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
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