Spitfire Spitfire 1300 camshaft dimensions

[aadc170]

Can anyone tell me what the journal diameters are on a camshaft for a 1300 spitfire engine? I'm trying to determine if I can use bearings from a 1300 in my Midget 1500. Thanks.

 

[Andrew Mace]

According to my Workshop Manual:

Journal diameter is 1.9654" - 1.9649"

Clearance is .0026" - 0.0046"

Bore in block is 1.9695" - 1.9680"

End float is 0.0085" - 0.0042"

 

[aadc170]

Looks like those are the same dimensions as my 1500. That engine must not have any cam bearings either. I know some of the 1300's had bearings, maybe the earlier ones. Does your manual have any info on those?

 

[Andrew Mace]

Data quoted is for later Spitfire Mk2 (1147) and Spitfire Mk3 (1296) as well as the equivalent Herald engines. There is a "Note: Camshaft bearings were introduced at GA177973, GD59745, FC61023. Size of bore in block identical to Herald 13/60 and Spitfire Mk.3." Sorry, but I don't seem to have comparable data for the MkIV and 1500.

 

[Don_R]

The early, small journal 1300 had cam bearings. The later big bearing 1300, like mine, the cam rides directly in the block, like the 1500.

 

[aadc170]

Guess I'll have to just order some bearings and see if they fit. Thanks anyway guys.

 

[Andrew Mace]

Why not give Ted Schumacher a call? [web site and contact info here] He should be able to tell you for sure if it'll work and what will work best. And say "hi" for me. :wink:

(No, I don't get anything out of referrals....)

 

[billspit]

I have a big crank 1296 and it has bearings in it.