BIG BLOCK FORD
Would you like to react to this message? Create an account in a few clicks or log in to continue.

460 Cam bolt

+2
dfree383
quarterflash
6 posters

Go down

460 Cam bolt Empty 460 Cam bolt

Post  quarterflash January 14th 2021, 7:51 pm

Why so many standards? What's the prevailing logic?

New Pro Comp Forged Cam - 3/8 UNC
AlkyDigger  Hex drive button - 7/16 UNF
Nicson/Magnaflow cam drive - 7/16 UNC

Clarity anyone.  My eyes are starting to cross again!   Mad

Steve
quarterflash
quarterflash

Posts : 17
Join date : 2020-12-01
Location : Lake Placid, Fl

http://www.dragboatfever.com

Back to top Go down

460 Cam bolt Empty Re: 460 Cam bolt

Post  dfree383 January 15th 2021, 9:26 am

What’s a pro comp forged cam?
dfree383
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14448
Join date : 2009-07-09
Location : Home Wif Da Wife.....

Back to top Go down

460 Cam bolt Empty Re: 460 Cam bolt

Post  quarterflash January 15th 2021, 9:42 am

dfree383 wrote:What’s a pro comp forged cam?


COMP Cams 34-850-9 Xtreme Marine Solid Roller Camshaft.
Steve
quarterflash
quarterflash

Posts : 17
Join date : 2020-12-01
Location : Lake Placid, Fl

http://www.dragboatfever.com

Back to top Go down

460 Cam bolt Empty Re: 460 Cam bolt

Post  rmcomprandy January 15th 2021, 12:00 pm

quarterflash wrote:Why so many standards? What's the prevailing logic?

New Pro Comp Forged Cam - 3/8 UNC
AlkyDigger  Hex drive button - 7/16 UNF
Nicson/Magnaflow cam drive - 7/16 UNC

Clarity anyone.  My eyes are starting to cross again!   Mad

Steve

It all pretty much has to do with whatever valve spring force is necessary with THAT camshaft.
A 3/8 bolt on a roller cam is a no-no in my opinion.

rmcomprandy

Posts : 5695
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Mike R and Mark Miller like this post

Back to top Go down

460 Cam bolt Empty Re: 460 Cam bolt

Post  Paul Kane January 15th 2021, 12:49 pm

quarterflash wrote:Why so many standards? What's the prevailing logic?

New Pro Comp Forged Cam - 3/8 UNC
AlkyDigger  Hex drive button - 7/16 UNF
Nicson/Magnaflow cam drive - 7/16 UNC

Clarity anyone.  My eyes are starting to cross again!   Mad

Steve
A bit of history on the subject:

The original 385 Series engines all came with a 3/8-16 threaded cam bolt, and so this is what the aftermarket roller cams all originally came with. Back in the 1980s racer Van Heskett started putting his solid roller cams in his milling machine and boring/tapping all his cam bolt holes to 7/16-20 thread for his 460-powered race cars. Shortly thereafter while he was setting up the first ever solid billet Boss 429 heads for Chuck Seyler, Seyler mentioned to Heskett that he had started instructing Crane Cams to make his cams with a 7/16-20 threaded bolt hole. So it seems both Heskett and Seyler each came up with the 7/16 460 cam bolt at about the same time.  After a few requests to Crane from Seyler for this mod, Crane started offering the big bolt as an option in their roller cams.
Paul Kane
Paul Kane

Posts : 970
Join date : 2009-09-15
Location : San Francisco Bay Area

http://www.highflowdynamics.com

Mike R, Gregaust and Mark Miller like this post

Back to top Go down

460 Cam bolt Empty Re: 460 Cam bolt

Post  Gregaust January 16th 2021, 3:07 am

Comp street roller XR-292-R is 7/16 UNF.

Gregaust

Posts : 579
Join date : 2009-08-09

Back to top Go down

460 Cam bolt Empty Re: 460 Cam bolt

Post  wickettoby1 January 16th 2021, 11:27 am

Double dowel pins and a 7/16 bolt with a performance intended camshaft should just be a standard thing. The damage that can result from a failure is way too severe in my $.02 opinion.

wickettoby1

Posts : 302
Join date : 2016-02-02
Location : SE Michigan

Mike R likes this post

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum