instaed of hijacking opus' thread (lost 5mpg), I wanted to pose this question to the group...

 

Is there any advantages or disadvantages to hooking up the disty's vac advance to the carb versus to the intake manifold.

 

I recently installed a weber 32/36 dgev, and left the vac adv hooked up to the intake mani. I have zero problems with it this way and I am a firm believer in "if it ain't broke, don't fix it". But curiosity leads me to pose this question...

Should I hook it up to the intake mani instead? anything gained or lost?

 

thanks

"left the vac adv hooked up to the intake mani. I have zero problems with it this way and I am a firm believer in "if it ain't broke, don't fix it". But curiosity leads me to pose this question...

Should I hook it up to the intake mani instead"

 

Not sure what your question mean. you left it hooked to the intake mani, but then you ask if you should hook it up there again instead?

good catch... long week, tired, & ready for cold ones & bbq...

 

I meant to ask, should I hook up the disty to the weber carb?

 

edit: Found this thread...

http://www.ultimatesubaru.org/forum/showthread.php?t=15423

 

long one to read, but well worth it... sorry I didn't find it before posting my question...

Edited May 22, 200916 yr by '84 Flat-Four
found the answer, i thinks

Yes, hook it to the weber. The advance on your distributor "stock" is hooked to a ported/tuned line from the carb. If you hook it to the manifold it will suck it to the max advance most of the time, and then let off when manifold vaccume is weakest at WOT. Kinda opposite from what you want. Set your timing to specs then find the port with little or no vaccume at idle (on the carb) that starts sucking when you tip the throttle. Then advance it to your liking.

It sounds like your advance canister may be bad. Check it by hooking a vac line to it and sucking on it while watching the mechanism. If it doesnt move its shot and you need replace it. If it is bad you can run with out it unhook it cap the line to it and advance it as much as you can at idle befor it misses. It runs better with it working tho.

Edited May 22, 200916 yr by ihscout54

weird, my disty was hooked to the hitachi and when I put the weber on I stuck it on there...

 

the only difference I could think of would be when the carb is choked... but I really have no idea... I left mine on the carb like it was...

ok, so I switched to carb ported vac advance for the disty. (versus mani vac as it was).

 

Very slight, but indeed a noticeable difference in high rpms and speed. No difference in the idle or low rpms, but when I need more balls (ie. passing) there is a bit more than before - not a world of a difference but definitely a difference!

 

Thanks all!