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Where/How to get a proper vacuum advance signal...

Posted: Mon Apr 18, 2011 7:51 am
by dr.occa
for your carbureted motor.


Image

Image

Please forgive the FILTHY engine (yes, I'm a little ashamed...that poor wagon =( ).

Re: Where/How to get a proper vacuum advance signal...

Posted: Sat May 07, 2011 2:36 am
by yotarolla
is that a sidedraft carb set up? what kind of engine is that?

Re: Where/How to get a proper vacuum advance signal...

Posted: Sun May 08, 2011 1:47 pm
by dr.occa
yotarolla wrote:is that a sidedraft carb set up?
Yep.
yotarolla wrote:...what kind of engine is that?
It's an "F"-3TC...(F=Filthy :P )

Re: Where/How to get a proper vacuum advance signal...

Posted: Wed May 11, 2011 6:13 pm
by yotarolla
well I know on the 4ac it only requires one vac line going from the carb to the dizzy, everything else can be blocked off. not sure if its the same for the 3tc but I would think it would be very similar if not.

Re: Where/How to get a proper vacuum advance signal...

Posted: Wed May 11, 2011 6:17 pm
by yotarolla
I just noticed your pic shows that u have it set up pretty much exactly like I was saying, lol. I would just try changing which two are connected to each other, and just systematically see that way which set up works best, hopefully that works.

Re: Where/How to get a proper vacuum advance signal...

Posted: Thu May 12, 2011 12:10 am
by assassin10000
lol @ mdf spacer. (Not knocking it or you, just amuses me)

Get a box of wire size drills from a hardware store. Measure the tube/vacuum port and drill a hole in the manifold with a size a atleast 2-3 thousandths smaller to make it press/lightly hammer fit. Probably best to start 5-10 thousandths smaller and work your way up in size.

Andrew

Re: Where/How to get a proper vacuum advance signal...

Posted: Thu May 12, 2011 10:25 am
by dr.occa
assassin10000 wrote:lol @ mdf spacer. (Not knocking it or you, just amuses me)

Get a box of wire size drills from a hardware store. Measure the tube/vacuum port and drill a hole in the manifold with a size a atleast 2-3 thousandths smaller to make it press/lightly hammer fit. Probably best to start 5-10 thousandths smaller and work your way up in size.

Andrew
Ah no that actually isn't mdf Andrew. It looks like it but those are phenolic spacers I carved out of some phenolic slabs I have laying about.

The vacuum should be right by the throttle plate opening for the initial vacuum pulse.

Re: Where/How to get a proper vacuum advance signal...

Posted: Thu May 12, 2011 3:45 pm
by daveskatesallday
maybe i should just go carb'd already