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Registered
Join Date: Jun 2019
Posts: 43
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Convert Heater Lever (at handbrake) to cold start lever - '83 SC
I am pondering various things in my EFI conversion.
I liked the old lever that helped with cold starts - simple and effective way to solve the problem of cold starts. It would also mean I don't need an idle air control valve and all the associated plumbing in the engine bay. Could I convert the lever I already have for the engine heater blower to a throttle adjusting cold start lever ? As always all inputs greatly welcomed, Douglas. |
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08-30-2023, 01:38 AM
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Full Send Society
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I don’t know what the mechanics of the heater lever are but I built a throttle lever for my efi and while most of the parts can be found online at Pelican, google, and eBay, there were a few critical washers that I had to source externally at McMaster and one absolutely critical one that I couldn’t find at all that I had to fabricate.
If you can weld or can fabricate stuff it will be no problem at all… if you’re looking for a drop-in bolt on solution… I’d reconsider and maybe look at a IAC valve. I did make a post somewhere with all the part numbers. Found it: https://forums.pelicanparts.com/porsche-911-technical-forum/1067600-2-7-x-faktory-pmo-efi-upgrade-18.html#post11818582
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-Julian 1977 911 S: Backdate, EFI/ITB, AC project in the works: http://forums.pelicanparts.com/porsche-911-technical-forum/1106768-when-well-enough-cant-left-alone-backdate-efi-itb-ac-more.html |
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08-30-2023, 03:36 AM
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Slippery Slope Expert
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I just did this a month or so ago on my ‘82. Almost all of the parts are readily available from our host or others.
A glaring exception is the slotted cylinder that goes on the throttle rod, which is critical. It was NLA. I advertised in the WTB classified for one and got one. That said it would be easily made by any machinist. It’s a slotted cylinder with a set screw to clamp it onto the throttle rod in the tunnel. I looked at IACV’s but decided the ECU I have might not support it.
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“As new technologies become indistinguishable from magic, and I can no longer tinker, the magic goes away for me.” |
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08-30-2023, 05:58 AM
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Join Date: Jun 2019
Posts: 43
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08-30-2023, 06:05 AM
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Registered
Join Date: May 2010
Location: atlanta
Posts: 1,981
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I just did this to my ‘82 with PMO carbs. I bought a used parking brake assembly with the hand throttle lever and machined my own piece to clamp on the throttle rod. With the geometry of the SC throttle linkage and carbs, the hand throttle is Very sensitive.
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08-30-2023, 07:50 AM
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Registered
Join Date: Jun 2019
Posts: 43
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08-30-2023, 07:52 AM
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Full Send Society
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I 3D printed a collar stop. The file is here if you want it:
Sketchup: https://www.dropbox.com/scl/fi/fmumzfq9rmwahk3wq7ihp/collar.skp?rlkey=q7x113lmwdrlfeldvj2ie06fz&dl=0 STL: https://www.dropbox.com/scl/fi/n8chptd9tagkzwzbvgqro/collar.stl?rlkey=3tlqs8ryn8s2cdwo1nsebay6q&dl=0 Stop bolts and tap came from McMaster
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-Julian 1977 911 S: Backdate, EFI/ITB, AC project in the works: http://forums.pelicanparts.com/porsche-911-technical-forum/1106768-when-well-enough-cant-left-alone-backdate-efi-itb-ac-more.html |
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08-30-2023, 08:48 AM
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PCA Member since 1988
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You can adapt anything if you're determined enough. If I wanted to do that, I think I would try to connect the heater wire to the throttle bell crank on the transmission and see how that works.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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08-30-2023, 10:21 PM
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