I work on my '83 off and on and I'm thinking it will be time to try starting it up. I think that I recall that there was some advantage to disabling the vacuum advance. Does this ring a bell to anyone?
The engine is a 2l of course with 10.4 CR pistons, larger valves, slight porting, a Guy Croft think head gasket and some hotter cams. The flywheel was lightened too. It has dual IDF.
I've got 2 distributors both SM802 (one CX and one AX if that makes a difference). The AX has had the vacuum advance removed and is cleaner. The CX is intact but has rust.
Anyway - your thoughts?
Disable vacuum advance on '83
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evm1024
- Posts: 85
- Joined: Tue Feb 05, 2008 12:33 am
- Your car is a: Pininfarina Spidereuropa 1983
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SteinOnkel
- Posts: 1000
- Joined: Tue Feb 19, 2019 9:31 pm
- Your car is a: 1978 124 Spider 1800
Re: Disable vacuum advance on '83
The main advantage of that vacuum advance is that it will throw more lead at it during highway cruising. Which in turn improves economy.
With your setup, you might run into knock with a setup like that. And the IDFs are going to consume fuel like it's coming out of a fire hydrant either way. Plus, plumbing the vacuum advance to all four runners is kind of a pain with four intake runners. Also, you'd be introducing a bunch of failure points.
I would just ditch it.
With your setup, you might run into knock with a setup like that. And the IDFs are going to consume fuel like it's coming out of a fire hydrant either way. Plus, plumbing the vacuum advance to all four runners is kind of a pain with four intake runners. Also, you'd be introducing a bunch of failure points.
I would just ditch it.