Advance vs. Advance & Retard 74 2.0 vs 76 2.0, Vaccum Throttle Dizzy ; Advantages? |
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Advance vs. Advance & Retard 74 2.0 vs 76 2.0, Vaccum Throttle Dizzy ; Advantages? |
detoxcowboy |
Feb 28 2010, 06:56 PM
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#1
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Senior Member Group: Members Posts: 1,294 Joined: 30-January 08 Member No.: 8,642 Region Association: Africa |
Ignorant to the advantages of vaccum advance and retard advice needed.
Situation; My 914 is a stock fuel injection 74 2.0 which uses only vaccum advance off the dizzy to the throttle body (single ported). I also have a throttle body (dual ported) from a 76 2.0. I have correct dizzy's for both years and correct vaccum canisters for both years.. Question; Is there any advantage to switching from the 74 2.0 advance only set up to the 76 2.0 advance/retard set up? Do I have to also switch the dizzy's?? |
Bleyseng |
Feb 28 2010, 07:52 PM
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#2
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
A stock 74 2.0L had only the Retard vacuum hose hooked up not the advance hose which was left laying under the runners. Hook up the retard hose.
A stock 76 used two vacuum ports on the TB but one went to the retard and the other to the EGR. Vacuum advance was left off IIRC A stock 73 2.0L has two ports on the TB and both are hooked up to the dizzy. Yes, hooking up the vacuum adv does give you 'slight" bump off idle in power do to more advance. The mechancial advance takes over by 2100 rpms IIRC |
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