Do I or Dont I Need the Other Pedal? - Alfa Romeo Bulletin Board & Forums
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post #1 of 10 (permalink) Old 02-27-2018, 07:51 AM Thread Starter
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Do I or Dont I Need the Other Pedal?

I've read conflicting statements here as to the need to change my throttle pedal from the Bosch EFI type to the carbureted type.

I believe I read (and understood) that the Weber bell crank from Centerline (pictured below) solves the push vs. pull issue and the existing Bosch EFI pedal and linkage works fine.

My Weber 40s are in transit.

Any thoughts?

Thanks in advance,

Keb
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1986 Spider Grad (one owner) converted to 1973 2L w/dual Webers in 2018, 2007 Honda Spirit VT1100C, 1980 Honda CX500 Custom, 2017 Triumph Tiger Explorer XRt, 1971 VW Beetle Convertible (complete restoration in progress for the wife)
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post #2 of 10 (permalink) Old 02-27-2018, 08:07 AM
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This isn't quite the question you asked - but that's the right bellcrank for dual carbs and it requires an intake manifold with matching mount point tab on the bottom. The fuel injection manifold doesn't have that tab.

Gas pedal: Look in the engine bay on your firewall at the gas pedal linkage... if it has a shaft leading to the right, attached to a lever arm pointing down (so that a rod can run under the carbs to connect to this bellcrank), you are ready to go.

Then you need a second short rod connecting upwards from the bell crank to the carbs. Let me see if I can get some decent photos tonight...

50 years from now - how are we going to restore a "classic" microprocessor based modern car?? Alfas - 1980 Spider, 1987 Milano, 1976 Spider
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post #3 of 10 (permalink) Old 02-27-2018, 09:00 AM Thread Starter
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Many thanks. K

1986 Spider Grad (one owner) converted to 1973 2L w/dual Webers in 2018, 2007 Honda Spirit VT1100C, 1980 Honda CX500 Custom, 2017 Triumph Tiger Explorer XRt, 1971 VW Beetle Convertible (complete restoration in progress for the wife)
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post #4 of 10 (permalink) Old 02-27-2018, 09:36 AM
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20yearoldspider:

Please don't take this as a put-down; I just mean it as a commentary on life in the 21st Century.

Given that you have a Bosch EFI pedal, and given that you plan on doing this conversion, why not just try it and see if you can make it work? People operated that way in the era before the Internet and civilization managed to muddle along.

Instead, we tend to rely on the word of complete strangers, who may in fact be dogs who have leaned how to type.


Admittedly I have never done the conversion you are contemplating. I know that a Bosch EFI pedal will push, in a manner similar to the carburetor pedal, and unlike the Spica pedal that pulls. But whether the shape is the same is an unknown; e.g., will it push the same amount, giving the same ratio of pedal movement : butterfly opening? Also, how easy is it to attach a rod end to the end of the pedal? That may take some modification.

Jay Mackro
San Juan Capistrano, CA

'63 Guilia spider
'65 Guilia Sprint GT
'67 Duetto
'91 164L

Last edited by Alfajay; 02-27-2018 at 09:41 AM.
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post #5 of 10 (permalink) Old 02-27-2018, 11:10 AM
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Quote:
Originally Posted by Alfajay View Post
20yearoldspider:

... complete strangers, who may in fact be dogs who have leaned how to type.
Woof, Woof!

50 years from now - how are we going to restore a "classic" microprocessor based modern car?? Alfas - 1980 Spider, 1987 Milano, 1976 Spider
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post #6 of 10 (permalink) Old 02-27-2018, 02:49 PM
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The Bosch EFI pedal will work with Webers on a Euro manifold. Been three & done that. You may have to make up the horizontal link from steel rod and be sure to cover it with heat shrink or similar plastic tube as it passes close to the starter power terminal.

Ed Prytherch
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A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke

Last edited by alfaparticle; 02-27-2018 at 02:54 PM.
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post #7 of 10 (permalink) Old 02-28-2018, 06:03 AM
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Here's the photos I promised: from a 1976 Spider, converted to dual Webers.
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post #8 of 10 (permalink) Old 02-28-2018, 06:05 AM
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This photo is the intake manifold I had to replace, due to the lack of a Bellcrank mounting tab.
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post #9 of 10 (permalink) Old 02-28-2018, 12:06 PM Thread Starter
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Quote:
Originally Posted by Alfajay View Post
20yearoldspider:

Please don't take this as a put-down; I just mean it as a commentary on life in the 21st Century.

Given that you have a Bosch EFI pedal, and given that you plan on doing this conversion, why not just try it and see if you can make it work? People operated that way in the era before the Internet and civilization managed to muddle along.
I hear what you're saying and, if I wasn't such a neophyte in the auto mechanical area, I would agree. I'm not a big fan of computer technology but I must admit that without it, I probably would have never undertaken this project (or seen so much porn ).

1986 Spider Grad (one owner) converted to 1973 2L w/dual Webers in 2018, 2007 Honda Spirit VT1100C, 1980 Honda CX500 Custom, 2017 Triumph Tiger Explorer XRt, 1971 VW Beetle Convertible (complete restoration in progress for the wife)
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post #10 of 10 (permalink) Old 02-28-2018, 12:07 PM Thread Starter
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Quote:
Originally Posted by bruce1976spider View Post
Here's the photos I promised: from a 1976 Spider, converted to dual Webers.
Brilliant. I'm more confident now that I can make it work. Thanks so much. K

1986 Spider Grad (one owner) converted to 1973 2L w/dual Webers in 2018, 2007 Honda Spirit VT1100C, 1980 Honda CX500 Custom, 2017 Triumph Tiger Explorer XRt, 1971 VW Beetle Convertible (complete restoration in progress for the wife)
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