distributor question for dual webers

[Guest Anonymous]

I just fit dual weber 40 DCOE's and a header on my 71 2002. I've got a later motor with an e12 head, but my stock vaccuum advance distributor has nowhere to connect to vaccuum. I've got the cannon intake manifold and the only port is for the brake booster. Is it possible to tap into that rubber hose, or should I just block off the line at the distributor. I know the tii distributor is not going to help me out, but I don't know what I should do with my vaccuum distributor.

thanks for any suggestions

[Guest Anonymous]

It's a SYSTEM, people... Sidedrafts generally don't offer vacuum connections. Sidedraft installs generally require a mechanical advance dizzy or a CDI, etc. Your stock dizzy will not advance correctly with the vacuum disconnected, and you'll be slower than you were with the downdraft and a stock exhaust mani. Sorry.

[Guest Anonymous]

You could go either way, but you'll have no problems if you just leave the hose off the distributor. There's no pipe coming from the manifold that needs to be blocked. The end at the dizzy can remain open.

Without vacuum advance, your mileage will be a bit lower under cruising conditions...so what? Otherwise, the distributor will act just like a mechanical-advance-only TII style unit, except the total advance curve is greater. This is not a problem with standard compression motors, but might be with a high compression motor.

Mike

[Guest Anonymous]

The vacuum dizzy provides as much mechanical advance as a TII unit; the only difference is that the vacuum unit bumps up the advance under light-throttle conditions, to improve fuel mileage. The unconnected vacuum dizzy is better for a sidedraft motor with low compression than a TI or TII dizzy would be, because their maximum advance is lower.

Sorry.

Mike

[Guest Anonymous]

Sorry, you're right, bad advice from not thinking it through before responding. Note to self -- do not let work frustration bleed over into lunchtime list activity.