Single weber fix?, Has anyone tried to fix the fuel runner issue |
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Single weber fix?, Has anyone tried to fix the fuel runner issue |
CatDaddy60 |
Feb 4 2013, 09:45 AM
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#1
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Member Group: Members Posts: 99 Joined: 30-January 13 From: Austin Tx Member No.: 15,451 Region Association: Southwest Region |
Ok I get it the fuel doesn't stay atomized in the runners and this causes poor fuel mileage, drivabillity concerns etc, I understand. But for those of us poor souls who for one reason or another are committed to this carb (the holley weber), has anyone tried heating the runners either electronically or with a subsequent exhaust runner ie type 1 vw and if so did it help with any of the concerns. my second question could anyone post a photo of what the throttle linkage should look like. i have a stock throttle cable and a cobbed together carb from a type 4 kit that has the carb turned 90 degrees and the cable wont reach the carb. any help will be appreciated.
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McMark |
Feb 4 2013, 10:45 AM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Use the aluminum or paper gaskets between the heads and the intake runners to transmit as much heat as possible. If you use the plastic 'phenolic' spacers your intake runners will stay cooler.
Otherwise, just do your best to tune it until you can get something better. |
'73-914kid |
Feb 4 2013, 11:11 AM
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#3
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Senior Member Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California |
I know of a guy who is creating a single weber IDF setup for the type 4 that pumps oil around the intake runners to keep them hot. The intake helps to act as an oil cooler, prevent percolation of fuel, and then injects the oil back into the rocker boxes.
This is whaat he claims at least.. I'm yet to see it in action. |
monkeyboy |
Feb 4 2013, 12:00 PM
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#4
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Senior Member Group: Members Posts: 808 Joined: 8-June 08 From: Los Angeles, Ca Member No.: 9,147 Region Association: None |
Just understand that there is more than one reason why that setup isn't the best...
If you heat the manifold you can get it to run better, but you will still have issues with that sharp turn that the manifolds take at the heads. I know you say you are stuck with it, but it's just not the right design for this motor. |
Mikey914 |
Feb 4 2013, 12:05 PM
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#5
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The rubber man Group: Members Posts: 12,638 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Have you though of going to dual webber set up?
The distance traveled to the head is shorter so it should allow the suspended fuel less time to become "un-atomized". Also closer to a straight shot into the head. |
LotusJoe |
Feb 4 2013, 02:19 PM
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#6
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Europa Twink Driver Group: Members Posts: 406 Joined: 30-November 09 From: Southern California Member No.: 11,085 Region Association: Southern California |
I started with the Weber 38/38 synchronous with the stock runners that come with the kit. I have since had runners made at FAT performance that are 54% larger. I then added the intake top and re-tuned the engine on the dyno. Now getting around 121 hp and seeing 13.8 Air/Fuel ratio. I think the 38/38 is a better carb than the 32/36 progessive that was used in years past.
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saigon71 |
Feb 4 2013, 04:21 PM
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#7
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Senior Member Group: Members Posts: 1,994 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
I started with the Weber 38/38 synchronous with the stock runners that come with the kit. I have since had runners made at FAT performance that are 54% larger. I then added the intake top and re-tuned the engine on the dyno. Now getting around 121 hp and seeing 13.8 Air/Fuel ratio. I think the 38/38 is a better carb than the 32/36 progessive that was used in years past. Joe: (IMG:style_emoticons/default/beerchug.gif) What are the specs on your engine to be able to pull 121 HP with the single 38/38? Thanks. |
LotusJoe |
Feb 4 2013, 05:54 PM
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#8
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Europa Twink Driver Group: Members Posts: 406 Joined: 30-November 09 From: Southern California Member No.: 11,085 Region Association: Southern California |
2056 using a 272 cam with 428 lift - 48mm / 38mm Valves with polished exhaust ports. Triad Performance exhaust
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.triadwestperformance.com-11085-1360022082.1.GIF) This carburetor is coming off in the spring and I'm switching to IDF type throttle bodies. Right now I'm leaning towards a kit from CB Performance. (IMG:style_emoticons/default/confused24.gif) |
struckn |
Feb 4 2013, 06:45 PM
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#9
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Senior Member Group: Members Posts: 1,069 Joined: 9-November 11 From: South Central York Pennsyvania Member No.: 13,764 Region Association: MidAtlantic Region |
could anyone post a photo of what the throttle linkage should look like. i have a stock throttle cable and a cobbed together carb from a type 4 kit that has the carb turned 90 degrees and the cable wont reach the carb. any help will be appreciated. (IMG:http://www.914world.com/bbs2/uploads_offsite/i1210.photobucket.com-13764-1360025100.1.jpg) (IMG:style_emoticons/default/confused24.gif) |
CatDaddy60 |
Feb 4 2013, 07:31 PM
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#10
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Member Group: Members Posts: 99 Joined: 30-January 13 From: Austin Tx Member No.: 15,451 Region Association: Southwest Region |
Thank you for the photos, as they say a picture is worth a thousand words.
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LotusJoe |
Feb 4 2013, 07:35 PM
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#11
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Europa Twink Driver Group: Members Posts: 406 Joined: 30-November 09 From: Southern California Member No.: 11,085 Region Association: Southern California |
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CatDaddy60 |
Feb 5 2013, 09:41 AM
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#12
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Member Group: Members Posts: 99 Joined: 30-January 13 From: Austin Tx Member No.: 15,451 Region Association: Southwest Region |
The carb have is a DGV32/36 5A with a manual choke. I'm in AZ so the choke isn't that big of a deal.
Attached thumbnail(s) |
CatDaddy60 |
Feb 5 2013, 09:44 AM
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#13
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Member Group: Members Posts: 99 Joined: 30-January 13 From: Austin Tx Member No.: 15,451 Region Association: Southwest Region |
and the car it is going in
Attached thumbnail(s) |
Kirmizi |
Feb 5 2013, 10:24 AM
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#14
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Senior Member Group: Members Posts: 836 Joined: 12-February 06 From: Wyoming, US Member No.: 5,568 Region Association: None |
Give DJ at Don Jackson Enterprises a call (602.997.2785).
He's got a single carb on his daily driver 914, he might have some good suggestions. Mike |
LotusJoe |
Feb 5 2013, 11:12 AM
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#15
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Europa Twink Driver Group: Members Posts: 406 Joined: 30-November 09 From: Southern California Member No.: 11,085 Region Association: Southern California |
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CatDaddy60 |
Aug 30 2014, 12:39 PM
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#16
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Member Group: Members Posts: 99 Joined: 30-January 13 From: Austin Tx Member No.: 15,451 Region Association: Southwest Region |
Give DJ at Don Jackson Enterprises a call (602.997.2785). He's got a single carb on his daily driver 914, he might have some good suggestions. Mike Gave him a call and a visit and after some moves and a job change I'm working on the car again. Thank you for your assistance. |
mrholland2 |
Aug 30 2014, 04:55 PM
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#17
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Senior Member Group: Members Posts: 750 Joined: 7-September 11 From: Santa Maria,CA Member No.: 13,531 Region Association: Central California |
Fiat air cleaner with a gm snorkel that has a heat riser flap and rise the heat from the exhaust
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02loftsmoor |
Aug 30 2014, 06:44 PM
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#18
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
could anyone post a photo of what the throttle linkage should look like. i have a stock throttle cable and a cobbed together carb from a type 4 kit that has the carb turned 90 degrees and the cable wont reach the carb. any help will be appreciated. (IMG:http://www.914world.com/bbs2/uploads_offsite/i1210.photobucket.com-13764-1360025100.1.jpg) (IMG:style_emoticons/default/confused24.gif) it works and it don't look bad |
Jake Raby |
Sep 1 2014, 01:41 PM
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#19
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
The runners are too long and the carb is too far away from the heat of the cylinder heads to keep the fuel from falling from suspension.
My experience with trying to make these rigs work better is about like putting lipstick on a pig. |
colingreene |
Sep 1 2014, 10:29 PM
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#20
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Senior Member Group: Members Posts: 729 Joined: 17-October 13 From: Southern California Member No.: 16,526 Region Association: Southern California |
why would anyone not want 2 carbs?
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