 Dual Carb Installation, Success - She Screams |
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| Mblizzard |
 Apr 5 2013, 07:36 PM
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#1
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Advanced Member  Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States  |
Working through the less than stellar instructions for the installation of my dual Webers. Beside having obvious errors in them it is not entirely clear which direction the cross bar should be pointed. To the front or the rear. I have not started placing the carbs on the car yet so the moment I move from the bench it may become clear but I think the front is correct. The directions seem to indicate that but if you install the linkage as shown one side of the crossbar link to the carb ends up at the front and the other at the back?
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| ThePaintedMan |
Apr 16 2013, 06:43 PM
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#2
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Advanced Member Group: Members Posts: 3,887 Joined: 6-September 11 From: St. Petersburg, FL Member No.: 13,527 Region Association: South East States 
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I didn't know you had 36 vents on there either. While the fact remains that you got used parts with carbs that were sold to you new, (IMG:style_emoticons/default/agree.gif) with Brant and Ethan. Even a really strong, well-breathing 1911 isn't going to be able to suck a volume of air that would work with those. (Refer to Bob Tomlinson's graph in his Weber manual).
At idle the situation will be likely be even worse, as you can't generate enough velocity with such a large opening on each barrel. The velocity of the air has a direct correlation with how much fuel each cylinder gets as well. Now that you have new carbs on the way (hopefully), you got the ideal situation and will be able to eliminate them if everything else is left the same. If it still doesn't run correctly, maybe it would be time to consider much smaller vents - probably in the range of 28-30 as Brant mentioned. An engine that's going to see a lot of top end use will lean towards 30s, while an "around towner" will like 28s. |
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Posts in this topic
Mblizzard Dual Carb Installation Apr 5 2013, 07:36 PM
Bob L. Once installed on the engine the carbs will be sta... Apr 5 2013, 07:48 PM ConeDodger The crossbar linkage should be installed in the ne... Apr 5 2013, 08:03 PM Mblizzard May not be apparent but if you do the bench instal... Apr 5 2013, 08:05 PM r_towle Towards the rear of the car. Apr 5 2013, 08:06 PM jmill
Towards the rear of the car.
:agree:
But wha... Apr 5 2013, 08:20 PM Mblizzard I will be pulling from the front so looks like a f... Apr 5 2013, 08:24 PM Mblizzard So if I "Call McMark for some good linkage... Apr 6 2013, 05:54 AM
ConeDodger
So if I "Call McMark for some good linkage... Apr 6 2013, 07:54 AM r_towle Original customs in Napa ca, or nearby.
Mcmark her... Apr 6 2013, 06:02 AM rhodyguy mike, i prefer the bar on the front. space is tigh... Apr 6 2013, 06:24 AM DBCooper
mike, i prefer the bar on the front. space is tig... Apr 8 2013, 04:14 PM Mblizzard Kevin - You went through my check list. Timing de... Apr 6 2013, 06:57 AM rhodyguy as ed china would say. "here's a top tip... Apr 6 2013, 07:18 AM audio_file
For the ultimate setup, call Chris Foley at tan... Apr 6 2013, 08:03 AM vw505 I looked on McMarks web site and didnt see it list... Apr 6 2013, 02:39 PM Mblizzard Installation looks pretty good. Some set up still... Apr 6 2013, 06:55 PM Mblizzard Beaten! Tried everything possible to get thes... Apr 7 2013, 07:43 PM ConeDodger I repeat: Install in nearest garbage can... :D Apr 7 2013, 07:51 PM jmill Are they new or did you rebuild them? Also you ne... Apr 7 2013, 07:56 PM Mblizzard I used the ones that came with the new carbs. I h... Apr 7 2013, 08:21 PM jmill Did you turn the throttle stops on both carbs equa... Apr 7 2013, 08:29 PM Mblizzard Set the idle screws on both the the 1/2 turn after... Apr 8 2013, 02:34 AM ldsgeek Try disconnecting the linkage from the carbs and s... Apr 8 2013, 04:58 AM rhodyguy mike, you didn't get back to me. does the idle... Apr 8 2013, 05:01 AM Mblizzard Kevin sorry I did not get back to you I was kind o... Apr 8 2013, 12:34 PM ThePaintedMan
Kevin sorry I did not get back to you I was kind ... Apr 8 2013, 01:04 PM Mblizzard True with the faucet pump. But I have a reasonabl... Apr 8 2013, 03:46 PM ThePaintedMan
Seeing as the carbs are brand new I don't th... Apr 8 2013, 04:25 PM jmill :agree:
I always check the float level out of th... Apr 8 2013, 08:14 PM jmill On a side note. I had a real steep driveway when ... Apr 8 2013, 08:20 PM Mblizzard So I checked the float on one of the carbs. I gue... Apr 9 2013, 04:49 AM rhodyguy hope i wasn't part of the "miffed". ... Apr 9 2013, 07:18 AM Mblizzard Kevin you were not part of it! Your advice wa... Apr 9 2013, 08:35 AM ThePaintedMan
I think the float level being so far out account... Apr 9 2013, 08:45 AM rhodyguy party on garth. ;) :) Apr 9 2013, 08:40 AM rhodyguy the carbs found a way to relieve the fuel pressure... Apr 9 2013, 09:03 AM Mblizzard I have read a number of the post on this forum whe... Apr 9 2013, 04:37 PM Mblizzard John Kevin I am happy to a large degree of success... Apr 9 2013, 07:38 PM jmill
So I checked the float on one of the carbs. I gu... Apr 9 2013, 07:43 PM rpmmaxxed Where did you purchase the carbs from? Reading thr... Apr 9 2013, 08:08 PM Mblizzard John that is what I thought on the float setting. ... Apr 9 2013, 08:19 PM ThePaintedMan
John that is what I thought on the float setting.... Apr 9 2013, 08:25 PM Mblizzard I got the carbs from Redline. I would have to say... Apr 9 2013, 08:34 PM Mblizzard While I was setting the carbs last night I happen ... Apr 10 2013, 06:53 AM rhodyguy 2 port exit breather box with the exits hooked to ... Apr 10 2013, 07:02 AM Mblizzard CFR unit is what? Apr 10 2013, 09:23 AM '73-914kid Tangerine Racing
The CFR breather can is halfway ... Apr 10 2013, 09:28 AM AE354803 Is there any advantage to returning the crankcase ... Apr 10 2013, 10:36 AM Mblizzard I was wondering that my self on the breather. Whi... Apr 10 2013, 07:44 PM jmill Empi and Bugpak have cheaper $30ish options. ... Apr 10 2013, 08:13 PM Mblizzard Well now this sucks beyond all imagination. Insta... Apr 13 2013, 11:09 AM DBCooper Sounds like your idle circuit is dead. If you jus... Apr 13 2013, 02:42 PM DBCooper Just thinking a little more, those are also the sy... Apr 13 2013, 02:59 PM Mblizzard This has been a problem with the carbs since the f... Apr 13 2013, 03:14 PM DBCooper
This has been a problem with the carbs since the ... Apr 13 2013, 03:26 PM Mblizzard Yep got the book. Read it. Can't say that anyt... Apr 13 2013, 03:46 PM Elliot Cannon I've had problems like that and it was idle je... Apr 13 2013, 09:45 PM Mblizzard Elliot - love the Red!
The more I think abou... Apr 14 2013, 07:12 AM rhodyguy call redline. see if they will take them back. you... Apr 15 2013, 07:21 AM Mblizzard Talked with Redline. They think it is an idle jet ... Apr 16 2013, 04:47 AM ThePaintedMan :agree: Selling used parts as "new" is a... Apr 16 2013, 05:38 AM rhodyguy MIKE!! next step is contact your credit ca... Apr 16 2013, 07:02 AM Mblizzard Following Kevin's suggestion, I contacted Amaz... Apr 16 2013, 10:25 AM timothy_nd28 I just hope that the carbs were indeed the problem... Apr 16 2013, 10:30 AM Mblizzard The one thing I will give Redline credit for is th... Apr 16 2013, 03:15 PM ThePaintedMan Something I thought about, which may or may not be... Apr 16 2013, 03:25 PM '73-914kid Just going to put this out there:
First off, the ... Apr 16 2013, 03:53 PM Mblizzard I find it extremely hard to believe that this is a... Apr 16 2013, 04:16 PM '73-914kid 36mm Vent is HUGE for a 1911. My only thinking on ... Apr 16 2013, 04:25 PM brant a 1911cc would probably be happy with a 28 or 30 v... Apr 16 2013, 04:41 PM Mblizzard While the concerns with the size and Venturis are ... Apr 16 2013, 06:21 PM timothy_nd28 consider going back to the factory cam and FI :id... Apr 16 2013, 06:26 PM Mblizzard Going back to FI is a long term goal. But if someo... Apr 16 2013, 06:41 PM rhodyguy the vents will certainly affect low speed operatio... Apr 16 2013, 07:26 PM Mblizzard According to AEC they can go to 28 or 30 I think. ... Apr 16 2013, 09:11 PM rhodyguy check your pms mike. share the idle jet advice fro... Apr 17 2013, 06:05 AM Mblizzard I have new carbs in hand! Went through them. ... Apr 20 2013, 07:52 PM jmill It'll run with the 36 vents. I had 44's w... Apr 20 2013, 08:49 PM Mblizzard Well this set works. Still some work to do on the ... Apr 21 2013, 06:29 PM DBCooper Not one, two steps forward. As it always is with ... Apr 21 2013, 07:01 PM Mblizzard Ok I now have a set of 28mm Venturi's in hand ... May 1 2013, 01:07 PM Mblizzard Well I seem to have had some major success! T... May 1 2013, 07:55 PM ThePaintedMan Great to hear! Brant, Ethan and DB know this s... May 1 2013, 08:39 PM Mblizzard George - They do look a little small. But while I... May 2 2013, 08:54 AM rhodyguy mike, i'm really happy this is working for you... May 2 2013, 01:11 PM Mblizzard Success! Took it out for a drive tonight afte... May 2 2013, 08:30 PM ThePaintedMan :Qarl: :headbanger: :trophy: :driving: May 2 2013, 08:38 PM rhodyguy 'party on garth' :Qarl: . any snapping or... May 3 2013, 06:40 AM Mblizzard Not a bit of snapping or popping. I only have abou... May 3 2013, 09:21 AM Mblizzard Had a little hesitation when accelerating. Follow... May 12 2013, 08:57 AM Mblizzard Wow that made a big difference. Still have a litt... May 12 2013, 09:43 AM Elliot Cannon If you increase the idle jets, I would take it a l... May 12 2013, 10:27 AM Mblizzard Elliot I have been making offers of American car p... May 12 2013, 01:18 PM Mblizzard Well the end point was 75 on idle jet and decrease... May 25 2013, 12:09 PM |
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