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Porsche Crest FS: Pair of Rebuilt Weber 40IDAP 3C (1) carbs for 1968 911

Sale Pending....

Rebuilt pair of Weber 40IDAP 3C and 3C1 carbs, one year only carbs for 1968 911.
Carbs in excellent shape, tight shafts, new rebuild kits installed after thorough cleaning (please see pics), also replaced brass fuel valve caps during rebuild, float levels set to factory specs.

Carb Specs:

Main Venturi / Chokes: 30mm
Main Jets: 135
Idle Jets: 55
Emulsion Tubes: F26
Air Jets: 180
Short (30mm) Chrome Velocity Stacks

SALE PENDING
$2100.00 plus shipping from 95688 (PayPal F&F please) or pay paypal fees











Last edited by Dominic; 01-14-2020 at 08:46 PM..
Old 12-30-2019, 10:34 AM
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Pics of rebuild...

Rebuild pics





Old 12-30-2019, 10:45 AM
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Wonder how these would work on a 2.7?
Old 12-30-2019, 11:54 AM
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Quote:
Originally Posted by ARCSinAK View Post
Wonder how these would work on a 2.7?
They would work just fine, just re-jet them for the engine size.
Old 12-30-2019, 12:12 PM
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I have the same carbs on my 2.7. They work fabulously, much better throttle response than the CIS, but until I do the top end I won't be able to put cams in to fully take advantage.
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Old 12-30-2019, 01:08 PM
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Quote:
Originally Posted by gordner View Post
I have the same carbs on my 2.7. They work fabulously, much better throttle response than the CIS, but until I do the top end I won't be able to put cams in to fully take advantage.
Gordner,
Thanks for the testament that they will work on a 2.7L engine.
Cheers,
Dominic
Old 12-31-2019, 08:27 AM
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Do you have any linkage for them?
Old 12-31-2019, 09:47 AM
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Quote:
Originally Posted by Myazel View Post
Do you have any linkage for them?
Sorry, I don't have any linkage for these carbs.
Old 12-31-2019, 09:52 AM
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These are priced to sell....
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Old 12-31-2019, 02:47 PM
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We are running these exact carbs on our 2.7 short stroke. You will have to change the chokes for a 2.7 (from 30 to 34). I have all the jetting specs available for our 2.7 short stroke, if you need them. We also installed the tall auxiliary venturis. On a 2.7 it’s best to get rid of the squish chamber CIS pistons and bump up the compression a little while your at it. Maybe 9.5/1 and then there is the CIS cams. We run modified S cams at 9.4/1 and are making about 250 HP, with headers, and 911R muffler. Good price on these carbs, if the shafts are in spec. Most carbs with over 30k or so miles are out of spec, and won’t run right due to air being drawn in around the loose shafts. We also had Jerry Woods work his magic on the distributor, per our build specifications.
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Last edited by rgofast; 12-31-2019 at 04:46 PM..
Old 12-31-2019, 04:40 PM
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So how easy is it to get new parts for worn out Webber shafts? Always been Leary about buying used carbs for motorcycles et because of this issue.
Old 01-01-2020, 05:17 AM
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There used to be oversized shafts available. I bought a set that came with spare oversized shafts and had Pierce Manifolds install them. The carb shaft bores have to be professionally sized to accept the new shafts, and then the carbs are flow tested on a bench to make sure everything is in sync. Sometimes the throttle plates also need work, and sometimes, even the bores need to be sleeved. I don't know if oversized shafts are still available. Check with Pierce Manifolds in Gilroy CA. They re shafted my carbs, and then I did the conversion of parts to make them work on my 2.7. We set them up with manometers, and run great. All of the idle adjustment screws are tuned to the same exact position, indicating everything is correct and flowing evenly.
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1969 911TR lightweight, 1850 lb. 245 HP 2.7 short stroke
1973 1/2 911T S optioned sunroof coupe (in progress)
1998 993 Carrera Cabriolet PSS10 lowered E88 cup wheels
1999 996 Carrera Cabriolet
Old 01-01-2020, 08:39 AM
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ttt
Old 01-05-2020, 11:33 AM
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Bump!

Old 01-11-2020, 09:04 AM
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