I may have asked this before although the search has not picked it up.
After fitting my new SD1 heads and cam, I fitted a Tim vacuum guage to the manifold - there are 2 bosses one used for brake servo, other was blocked off.
Anyway, I am seeing too low a vacuum i.e. there is less vacuum than supposed to be - and dunno why. This would indicate an air leak but although I cannot rule it out, I don't think I have one.
Anyone have ideas what to look at next?
After fitting my new SD1 heads and cam, I fitted a Tim vacuum guage to the manifold - there are 2 bosses one used for brake servo, other was blocked off.
Anyway, I am seeing too low a vacuum i.e. there is less vacuum than supposed to be - and dunno why. This would indicate an air leak but although I cannot rule it out, I don't think I have one.
Anyone have ideas what to look at next?