Home Search search Menu menu Not logged in - Login | Register

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
Stock cam sizes  Rate Topic 
 Posted: 05-12-2008 02:12 pm
  PM Quote Reply
1st Post
Tim Knowlton

Joined: 03-17-2005
Location: Marblehead, Massachusetts USA
Posts: 33
Can anyone tell me what the stock cams sizes are on a 74 1/2 5 speed.

Thank you

Back To Top PM Quote Reply  

 Posted: 05-12-2008 08:54 pm
  PM Quote Reply
2nd Post
Judson Manning

Joined: 03-14-2005
Location: Atlanta, Georgia USA
Posts: 406

Check the back threads as we've discussed this in detail before.  From memory the Federal 'C' cam has .340" lift and 272^ duration at zero lift.  This cam was used on all JH years the only difference being variations in timing. 

Later european 907 variants included the 'D' and 'E' cam which had less duration, something like 260^ but different lobe centers.  The 107 had a further reduction in duration but bumped the lift to .378" to compensate for the 2.2 litre 912/910 variants.  Lastly, the 104 was developed for the 912SE in the Excel Intake only and it had .410" lift and strangly enough, the same duration (272^) as the original 'C' cam.


Back To Top PM Quote Reply

Current time is 01:12 pm  
> Jensen Healey & Jensen GT Tech > Engine & Transmission > Stock cam sizes Top

UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems