Carb advice |
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Carb advice |
yellownerd |
May 19 2022, 12:51 AM
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#1
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Newbie Group: Members Posts: 3 Joined: 18-May 22 From: USA Member No.: 26,562 Region Association: Upper MidWest |
Thanks in advance for your expert advice!
I’m current running a single ill performing Weber 32/36 progressive carb on my 73 1.7. Before I rip and replace it, is there anything else I should be considering? Any thoughts on dual carbs? |
930cabman |
May 19 2022, 05:03 AM
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#2
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Advanced Member Group: Members Posts: 3,183 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
You may find a consensus here of single carb haters. I cannot recall reading one post where the owner was happy with a single carb conversion. BUT, I purchased a '74 last year with a single Holley conversion and it was ok, most recently I have changed it to twin Webers. If she is running, let her keep running
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Shivers |
May 19 2022, 06:59 AM
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#3
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Senior Member Group: Members Posts: 2,453 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
If it gets cold where you are, I might suggest another set up. I put one on in the early 80's and it got me around, in SoCal where it is warm. Those long rails were made to carry air, fuel vapor does not do well in those tubes. It was on my car about 3 months and went to duel 40 webers when I made my 1700 a 1911. And nothing sounds like duel carbs. (IMG:style_emoticons/default/smile.gif)
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brant |
May 19 2022, 07:32 AM
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#4
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914 Wizard Group: Members Posts: 11,641 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
The problem with a single carb is that the fuel does not stay suspended (mixed with air) in the long length of the intake runners
Remember the carbs job is to mix the fuel into mist mixed with air The long intake causes the droplets to pool and drip out of the air mix The fuel lnjection system only carried air without fuel in those intakes Twin carbs with shorter intakes will always mix better…. Physics |
GregAmy |
May 19 2022, 08:01 AM
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#5
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Advanced Member Group: Members Posts: 2,311 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
Remember the carbs job is to mix the fuel into mist mixed with air The long intake causes the droplets to pool and drip out of the air mix The fuel lnjection system only carried air without fuel in those intakes Which is why - sorry, I have to say it, it's a compulsion - a properly-working stock EFI system is sooooo much moar betterer for street driveabilty on a stock-ish engine. And there's a ton of knowledge and support now for those systems, such that ripping it off and replacing with a single carb just isn't reasonable any more. But that said...yeah, duals are much betterer than the single for overall driveability, especially in varying ambient conditions. - GA |
yellownerd |
May 19 2022, 08:36 PM
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#6
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Newbie Group: Members Posts: 3 Joined: 18-May 22 From: USA Member No.: 26,562 Region Association: Upper MidWest |
If possible, please recommend a kit. I'd prefer to spend a few dollars more to grab a dual carb kit that includes all I will need for the conversion. Here's a few pics...
(IMG:http://www.914world.com/bbs2/uploads_offsite/i.ibb.co-26562-1653014199.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/i.ibb.co-26562-1653014200.2.jpg) |
914werke |
May 19 2022, 08:50 PM
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#7
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"I got blisters on me fingers" Group: Members Posts: 10,157 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
PM'ed
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nditiz1 |
May 19 2022, 09:29 PM
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#8
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Senior Member Group: Members Posts: 1,191 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region |
Set of Weber 40s - Aircooled.net has a setup as well and John sets them up and goes through them.
Intakes from CB Performance - actually could just buy the carbs from them too Phenolic spacer gaskets SvDA distro - pertronix one that removes the points too OR 123 ignition distro CSP linkage OR tangerine OR sync link, not sure where to buy this one, but tangerine is similar Vacuum check valve Carb kit should come with air filters Breather box - can be cheap EMPI or home built Your current Fuel Pump should be good for dual carbs |
yellownerd |
May 20 2022, 08:21 AM
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#9
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Newbie Group: Members Posts: 3 Joined: 18-May 22 From: USA Member No.: 26,562 Region Association: Upper MidWest |
Set of Weber 40s - Aircooled.net has a setup as well and John sets them up and goes through them. Intakes from CB Performance - actually could just buy the carbs from them too Phenolic spacer gaskets SvDA distro - pertronix one that removes the points too OR 123 ignition distro CSP linkage OR tangerine OR sync link, not sure where to buy this one, but tangerine is similar Vacuum check valve Carb kit should come with air filters Breather box - can be cheap EMPI or home built Your current Fuel Pump should be good for dual carbs Thanks! I'll check this out. |
CCE |
May 20 2022, 08:36 AM
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#10
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CCE Group: Members Posts: 326 Joined: 28-December 21 From: Mexico Member No.: 26,203 Region Association: NineFourteenerVille |
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rhodyguy |
May 20 2022, 08:56 AM
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#11
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,098 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Buy a Triad X bar linkage while you still can. That fuel filter should not be in the engine compartment. Get some shouldered clamps for the fuel lines. Seek out a set of 40s, Italian or Spanish, and let a pro shop go though them. CB tall manifolds can be had for about 1/2 price in the classifieds here.
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