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pottsthomas

weber carb tuner

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You can do it...Just get a Weber book if you are so inclined...Or look up a local german car specialists, Porche folks can be your freinds too. Same theory..with their 48 IDA`s etc. Oh dont forget to lean your local PA get together

freinds as well. A couple beers etc $$ ..lol.

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I suppose I could do it. Planned on it, downloaded some guides, but here's the deal. In the past year and a half I didn't do it. The previous owner who had it for three years didn't do it. The guy who had the motor built up who the po bought it from didn't do it. The mechanic who inspected it and has some good carb knowledge didn't do it. My car runs like a bear from 3-6k, but stumbles off idle like its too rich. Healthy backfire on the overrun as well. I'm thinking its worth some money just to have someone who really knows what they are doing tune the car to their best ability. Otherwise, I'll never really know whether its done right or not.

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not sure how far from you.....look for Stone Racing......he is on here as well ....

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Update on carb tuning.   Finally found some help with this.  We're trying an adjustable cam gear to help get more vacuum off idle.  I will update after it goes on.  Apparently the jetting was not the issue.  It has to do with the interaction between the cannon manifold, the 38/38 and the 284 cam, basically dumps too much fuel in without enough vacuum to get good combustion.

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Yeah, that can be a problem- and some 38's seem to do it worse than others.

 

The 38/38 synchronous isn't a good fit for the 2002 as it sits- way too much throttle area at

low velocity.  I gotta get out the welder and do the 'crossover' manifold....

 

Susquehanna Motorsports, from when I was in college...

 

t

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Its a year later, and the variable cam gear has totally fixed the issue.  The 38/38 may be jetted slightly rich still, but hardly worth mentioning.

The motor just runs great, no problem with the 38/38 at all.  I greatly prefer it to the progressive weber I have on my Fiat.  Pulls off idle nicely, and you avoid the annoying on/off transition when the second barrel kicks in- just smooth, tractable power.  Sort of proves the old adage- 90% of carb problems are ignition ( or timing-whatever).

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(edited)

Its a year later, and the variable cam gear has totally fixed the issue. The 38/38 may be jetted slightly rich still, but hardly worth mentioning.

The motor just runs great, no problem with the 38/38 at all. I greatly prefer it to the progressive weber I have on my Fiat. Pulls off idle nicely, and you avoid the annoying on/off transition when the second barrel kicks in- just smooth, tractable power. Sort of proves the old adage- 90% of carb problems are ignition ( or timing-whatever).

Did you have to degree the cam with a degree wheel before you figured out how much to move the adjustable cam gear to solve your issue? I have a degree wheel, and might have to do this on my M10, 292 cam, 40 DCOE's. I get the same symptoms as you described initially. I'll get some help soon from Jeremy at Ireland Eng, but thought I'd ask...thx Edited by boxy02

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