lazarat
Well-known member
- Joined
- Feb 7, 2018
- Messages
- 657
So my buddy with a low mileage '54 Chev Del Ray switched his 235 six points distributor for the HEI, bought at a performance shop up the road, (cool place).
We installed it yesterday, he was told by shop and others that he doesn't need the vac advance. On these cars, the original vac advance is hooked to the body of the original carb, and turns the whole distributer under vac.
This HEI has the vac advance very similar to the late model style, which is under vac all the time but turns the inner plate when it loses vac, so I hooked it up to the manifold vac which use to run his vaccuum wipers, (which loses vac when you accelerate, I am sure many of you guys remember those days).
It is a lot better, than what he was dealing with, but to me I still detect slight hesitation, so I am going to advance the timing a bit more today.
What say you on this idea of no vac advance? I say it is needed for his style of driving in the city, this is not a big block dragster.
We installed it yesterday, he was told by shop and others that he doesn't need the vac advance. On these cars, the original vac advance is hooked to the body of the original carb, and turns the whole distributer under vac.
This HEI has the vac advance very similar to the late model style, which is under vac all the time but turns the inner plate when it loses vac, so I hooked it up to the manifold vac which use to run his vaccuum wipers, (which loses vac when you accelerate, I am sure many of you guys remember those days).
It is a lot better, than what he was dealing with, but to me I still detect slight hesitation, so I am going to advance the timing a bit more today.
What say you on this idea of no vac advance? I say it is needed for his style of driving in the city, this is not a big block dragster.