 Tuning dual Webers, Looking for input in the PNW |
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| TC 914-8 |
 Dec 8 2011, 09:53 PM
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Senior Member  Group: Members Posts: 812 Joined: 23-May 08 From: Sequim, WA Member No.: 9,090 Region Association: Pacific Northwest 
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I just found out my wifes coworker, The Dr Vet's husband, has a 75 2.0 with a dual Weber downdraft conversion. I stopped by last weekend to take a look. it has some minor electrical issues which I should be able to sort out fairly quick with proper diagnostics. Horn, lights etc..
One of his main concerns is mis firing and sputtering during acceleration. It is a fairly clean set up bought from a guy in Bremerton back in 2000. I forgot his name but should be active on this site. so under slight acceleration, reving the engine it sputters around 2500 RPM. with no gauges or tools I noticed the F/A screws on the driverside carb were out different ratios. I gave them a slight adjustment and it seemed to help. I figure we need a air flow meter to put over each venturi and dial in each barrel evenly. (IMG:style_emoticons/default/idea.gif) Being a V-8 guy I would slap on a vaccume gauge and adj from there.... I did not see any vacume ports so its all new to me (IMG:style_emoticons/default/confused24.gif) How do you boys dial these babys in? I was also under the impression a stock FI cam is not really compatible running carbs... (IMG:style_emoticons/default/confused24.gif) Shoot me some ideas , once I get him running, I will have a new teener buddy in the neighborhood to tool around with since you Teener Tuesday boys are afraid of coming accross on the ferry (IMG:style_emoticons/default/poke.gif) |
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| J P Stein |
Dec 9 2011, 11:50 AM
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
There are a number of things that could be causing these problems, snycing the carbs is just one of them. Keeping on this topic, synchronizing/tuning the carbs is fairly easy.....*when you know how*. It is not a poke & hope operation, but all in the methodology... but the mechanics of the carb linkage can make it near impossible to attain.
A Syncrometer (snail) is the choice of tools being inexpensive & fool proof. It is best to take the car to some one that knows the "Webber dance" and pay close attention to how he does it. It has been my experience that internet tuning is a waste of time ....there are just too many variables. I know, I make it sound like some kinda black art.......well, it is. |
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Posts in this topic
TC 914-8 Tuning dual Webers Dec 8 2011, 09:53 PM
Ductech I would start with thinking about how long this ca... Dec 8 2011, 10:06 PM
TC 914-8
I would start with thinking about how long this c... Dec 8 2011, 11:52 PM Ductech Some people used old sync gauges that would go ove... Dec 8 2011, 11:59 PM nathansnathan
Some people used old sync gauges that would go ov... Dec 9 2011, 09:40 AM mrbubblehead i use a snail for synchronizing and an innovate ai... Dec 9 2011, 12:07 AM jaxdream Don't forget to adjust the valves before synci... Dec 9 2011, 08:42 AM rdauenhauer and there is the old standby...ditch the carbs ... Dec 9 2011, 09:51 AM stownsen914 Cars that haven't been run much can obviously ... Dec 9 2011, 11:22 AM stownsen914 Oops duplicate post Dec 9 2011, 11:25 AM messix Have I not taught you any thing?
Go give it an I... Dec 9 2011, 11:36 AM pt_700 slightly ot but, i had an old mechanic friend once... Dec 9 2011, 12:48 PM TC 914-8 Wow, thanks guys for all the input, I like the Car... Dec 9 2011, 09:09 PM a914622 Hey i have a snail syncer i could let you use to s... Dec 9 2011, 10:36 PM mrbubblehead
Just a thought but i rigged a vacuum line back o... Dec 9 2011, 10:55 PM TC 914-8
Hey i have a snail syncer i could let you use to ... Dec 10 2011, 01:05 AM |
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