Weber jet recommendation |
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Weber jet recommendation |
SKL1 |
Nov 22 2015, 09:32 PM
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#1
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Senior Member Group: Members Posts: 1,602 Joined: 19-February 11 From: north Scottsdale Member No.: 12,732 Region Association: Upper MidWest |
2.0 with Webcam and Mallory distributor. Timing set and carbs synched, but really flat just off idle. Runs better when further up in the revs.
At 1800' in AZ. Currently: 40 IDF, 200 air correction, F11 emulsion tube, 115 main, 58 idle, 55 float bowl, 28 venturis TIA... |
Eric_Shea |
Nov 25 2015, 08:11 PM
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#2
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
QUOTE I'm running 55 idles, 135 main jet, 200 air corrector, F11 tubes in my 40IDFs floats set 10mm & 42mm on my 2.0L stock cam & dizzy with vacuum pipe from both banks. Just spent a good while setting up and balancing (+ guage set fuel pressure to 3psi) and I'm getting an odd post ignition "pop" of un-burn fuel in the exhaust on an over run (when I let off the throttle) and after siting at idle a long while when accelerating after. This may mean my mains/idle are too large or is it just running a tiny bit rich? When I lean off the "popping" gets worse? I'm at sea level so not sure how you make the altitude calc? Ideas please guys? I'll use the same data from my spreadsheet that I just used above meaning, 2 liter with a cam that makes peak hp at 5000rpm. Tell me if you have anything different. Here's the sea level calculation: Venturi's = 32 Mains = 150 (yours are too small - lean condition) Air Correction = 165 (yours are way too big, this can cause that lean condition and limit your power at higher rpm's) Idle jets = 55 - Yours are fine. Popping can be a lean condition or, an exhaust leak (popping on decel). Type IV's are prone to exhaust leaks. I'd dump the vacuum dizzy for a euro .009 or, try the new MSD setup (system) for VW's. You'd have to change some plug wires around but, that's a promising alternative from what I'm seeing. Raise the fuel pressure to 3.5. Perhaps even 4 if the pump is in the front trunk. There might be a better emulsion tube for that cam but... You really need a new cam to take advantage of everything the carbs have to offer. If I were you I would either look for a cam or look for the stock fuel injection to bolt back on that thing. (IMG:style_emoticons/default/wink.gif) |
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