Mixture on CD 150's

[Gully]

There are two needles for CDSEs on Mk3s, don't know the numbers but they are pre and aft engine number KE0000. There is also a third needle for pancakes. Rimmers sell all three. I know this because Rimmers stitched me up with a carb repair kit containing the wrong jets.

 

B5AJ for very early 1970 Mk 3

B5BT for up to KE10000 generally

B5CF for post KE10001

 

But, check your carb set numbers too, as many will have been swapped around! I have a Nov 70 built car, but the carb set for that is 3335 R/L which is a B5BT metering needle. Then there's the spring debate... The Zenith Stromberg applications list doesn't list the spring colour for all carb sets' applications.

 

Gully

[dougbgt6]

Argh! Finger trouble, I meant KE10000. But Rimmer do say 10000, not 20000 so can someone put me straight?

[Pete Lewis]

Put you straight !!!! Didnt the Tower used to have a Rack, that should line things up .... pull...argh

[Gully]

Argh! Finger trouble, I meant KE10000. But Rimmer do say 10000, not 20000 so can someone put me straight?

According to the Stromberg manual, it's based on the carburetor sets as follows:

 

GT6 Mk 3 1970 Set 3369 R/L - B5AJ

GT6 Mk 3 1971/72 Set 3335 R/L - B5BT

GT6 Mk 3 1972/74 Set 3432 R/L - B5CF

All 150CDSE

 

GT6 Mk 3 1972/74 Set 3507 R/L - B5CF 150CD-SEV

 

Given the dates and giving it some thought, it makes more sense that the change from the BT needle to CF coincides with the change in cylinder head at KE10001 rather than the deletion of the Rotoflex rear. I've conflicting reference books! Edited above.

 

Gully

[dave.vitesse]

The domed pistons and the 218225 head and the 311399 (18 58) cam also was applied at engine number KE10001. Lower compression and a less sporty cam. But better MPG and lower pollution. The cylinder block and head were now common with the 2.5 engine, that was the intention. 

 

Dave