Cam Timing - Offset Dowel

[petert 549]

Most people don't realise, that if you skim the head, you retard the ignition timing. Here's how I correct the problem. In this case, the cam is advanced 2º (crank). The same can be done for aftermarket cams, the beauty of which the cam locking hole remains, which isn't always the case with aftermarket vernier pulleys.

Edited January 23, 2023 by petert

[DamirGTI 323]

Using original locking hole but with the different pin ? (OE pin is square shape if i remember)

 

D

[petert 549]

There are two versions, round pin and square pin. The round is easily knocked out. Drill out the square pin.

Edited January 24, 2023 by petert

[DamirGTI 323]

Indeed ! there's two .. memory is a bit shabby lately .

I've an assortment of both types then ..

 

Any way one can find out how much is 1deg. spacing on the pulley , say from the center of the OE pin in either direction advance<->retard , without measuring on the engine with the dial gauge ?

 

D

Edited January 24, 2023 by DamirGTI

[petert 549]

1 deg (cam) = 0.25mm

Edited January 26, 2023 by petert