New build pic, looking for jetting/timing recommendation |
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New build pic, looking for jetting/timing recommendation |
consolidated |
Feb 5 2012, 04:26 PM
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#1
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Newbie Group: Members Posts: 15 Joined: 14-November 11 From: Texas Member No.: 13,781 Region Association: None |
The 914 Spec series or "H2R Challenge" is starting next week but I feel the car may not be making optimum power. It has dual 40 IDF Webers with stock 155mm main jets, I'm in Austin, Texas 450' elevation.
Any carb and timing tuning advice would be very much appreciated. The motor is s stock 1.7L, rebuilt with new pistons, rings, bearings, crankshaft, seats etc. Compression is good. How much timing advance is optimal for these motors? Thanks! |
Borderline |
Feb 6 2012, 08:49 PM
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#2
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Senior Member Group: Members Posts: 720 Joined: 8-February 05 From: San Juan Bautista, CA Member No.: 3,577 Region Association: Northern California |
155 mains sound pretty rich for Weber 40's and 1.7L. I was running 135's on my 1911cc motor with weber 40"s FWIW
edit: The question I forgot to ask is what venturi size are you running...makes a difference! |
consolidated |
Feb 6 2012, 09:13 PM
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#3
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Newbie Group: Members Posts: 15 Joined: 14-November 11 From: Texas Member No.: 13,781 Region Association: None |
155 mains sound pretty rich for Weber 40's and 1.7L. I was running 135's on my 1911cc motor with weber 40"s FWIW edit: The question I forgot to ask is what venturi size are you running...makes a difference! Main venturi is 28mm. The plugs look lean, hmmmm. We had too much advance however, backing that off this week. |
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