Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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robert1839
Tristan Cook
5579 Timber Ridge Dr, Mt Vernon, Skagit, Washingto
(118 posts)

Registered:
05/06/2013 11:11PM

Main British Car:
MGB GT 1972 Buick 215

cam
Posted by: robert1839
Date: May 29, 2013 07:45PM

Ok before I get started I want to say that I WILL be sending my cam off to be reground
Now that being said what happens if I didn’t have it sent off to be reground it has some pitting on it some ware from the lifters it seems like such a small thing that it wouldn’t matter because it did work when it was in the car so why is it so important to have it done


MGB-SBC-Jimmy
Jimmy Geske

(35 posts)

Registered:
01/27/2011 08:02AM

Main British Car:
Re: cam
Posted by: MGB-SBC-Jimmy
Date: May 30, 2013 02:59PM

If it has worn at all, it will continue to wear until its gone, even if you have the same lifter still mated to it, though I'd imagine the lifter that goes to that lobe will likely show wear as well. You need all new mating surfaces if any sign of lobe wear. Thats just one honkey's opinion though,hehehe..........


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: cam
Posted by: roverman
Date: May 30, 2013 06:56PM

Tristan, If your proficient with calipers, you can measure lobe wear, nose to heel. It's likely the intake lobes,will have more lobe lift, than the exhaust. The problem with re-grinding is, you need to grind "all" intake or exhaust lobes down to where the "worst" lobe has 100% cleanup. These cams have a small base circle, and re-grinding only aggravates this problem. IMHO, if you value a quality build, buy a new cam and lifters. TRW used to sell oem replacement, new cams, at less than aftermarket $'s. Cheers, roverman.
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Moderator
Curtis Jacobson
Portland Oregon
(4577 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: cam
Posted by: Moderator
Date: May 30, 2013 10:31PM

Considering that a brand new Crower camshaft costs just $158 (shipping included), I'm wondering if it's really cost effective to regrind an old cam.

Ref: [www.crower.com]

What do shops charge for regrinding a cam?


robert1839
Tristan Cook
5579 Timber Ridge Dr, Mt Vernon, Skagit, Washingto
(118 posts)

Registered:
05/06/2013 11:11PM

Main British Car:
MGB GT 1972 Buick 215

Re: cam
Posted by: robert1839
Date: May 31, 2013 12:00AM

the shop I would like to send it to wants like 80 for it but if it would be better to buy I new one I will do that what do u think


MG four six eight
Bill Jacobson
Wa state
(325 posts)

Registered:
10/23/2007 02:15AM

Main British Car:
73 MGB Buick 215, Eaton/GM supercharger

Re: cam
Posted by: MG four six eight
Date: May 31, 2013 02:11AM

Here is a link to Delta camshaft's web site where they have some interesting videos on how the process works.
I have used them in the past for custom grinds, such as forced induction engines where there may not been an "off the shelf" grind aviliable.
[www.deltacam.com]

Bill


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: cam
Posted by: ex-tyke
Date: May 31, 2013 09:22AM

To re-iterate what Jimmy has posted, with a new cam, you'll need a new set of lifters - don't re-use the old ones.



mgb260
Jim Nichols
Sequim,WA
(2464 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: cam
Posted by: mgb260
Date: June 02, 2013 12:36PM

Delta does good work on regrinds. It usually results in a smaller base circle and longer pushrods may be necessary. Also never reuse old lifters,use new ones on a reground cam also.


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