Jump to content

Herald Fast Road Cams


948_droptop
 Share

Recommended Posts

Not sure whether the 948 had a large or small journal cam, but they are all available. 

1200 cams are early and late and the 12/50 may be different again? Just choose the one that suits the way you plan to use the car.

(presume you mean 948 twin carb.... a twin cam would be very interesting!)

Link to comment
Share on other sites

Early 948 Herald saloon camshaft was part number 204490, coupe was 202931 - the coupe was twin-carb. Rimmer's site claims this is the same part number for the 1200 coupe as I have listed for the 948 coupe - this points to a straight swap, but they also list the Spitfire version 211433 for the Herald 1200.

1200 was 211256 while early Spitfire 1147 was 211433 -  the Spitfire MK3 is allegedly the one to go for if it'll fit the 948 block, which is something I've never checked before, as opposed to the early shafts.

All but the late 13/60 were small journal camshafts. 

Check Moss Europe as they seem to have performance camshafts listed.

https://www.moss-europe.co.uk/camshaft-fast-road-small-journal-new-212164-th5.html

Here's a link with a lot of interesting spec:

http://www.auskellian.com/paul/links_files/spitfire_cam_specs.htm

Herald data is below, if I've copied it correctly from a word document:

948:

Valve Timing
Inlet opens 10° B. T. D. C.
Inlet closes 50° A. B. D. C.
Exhaust opens 50° B. B. D. C.
Exhaust closes

10° A.T.D. C.

 

Herald 1200 Engine Nos:  
GA.HE to GA. 164,889 HE – Inlet opens 12° B. T. D. C.
GA. 177,973 HE to GA. 178,000 HE – Inlet closes 52° A. B. D. C.
GB. 1 HE to GB. 2,700 HE – Exhaust opens 52° B. B. D. C.
GB. 1 HE to GB. 2,700 HE – Exhaust closes 12° A. T. D. C.
All other Herald 1200 and Herald 12/50 engines – Inlet opens 18° B.T.D. C.
All other Herald 1200 and Herald 12/50 engines – Inlet closes 58° A. B. D. C.
All other Herald 1200 and Herald 12/50 engines – Exhaust opens 58° B. B. D. C.
All other Herald 1200 and Herald 12/50 engines – Exhaust closes 18° A.T.D.C.
Link to comment
Share on other sites

The MK3 cam was fitted to the late Mk2 spit (I guess that should be the other way round), so should fit. Cam bearings were not always fitted to small journal cam engines. I have an early mk2 spit block in which the cam runs directly in the block and a late with bearings, the late mk2/mk3 spit cams fits both. So any small journal cam will fit. late mk2/3 is 65/25 profile. 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...