 Solex 40 PII Jetting Help, Solex jetting for 1.8 liter race motor |
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| chfrank |
 Apr 8 2014, 12:30 PM
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Newbie  Group: Members Posts: 7 Joined: 28-July 11 From: United States Member No.: 13,372 Region Association: Northern California  |
I am trying to work out a flat spot rich condition between 3600 and 4600 RPM on some race prepped single shaft 40-PII carbs. The carbs have the following jetting: 160 main 160 air, 57.5 idle with 1.1 idle air, 25 Emulsion tubes, no enrichment tubes with enrichment jets soldered shut. 37.5mm venturi, float height has been reduced 2mm below the low setting. Large needle valve, and I have the accelerator pumps with just a dribble coming out with a full stroke and 34 degrees of total advance. Tried larger jets with larger air correctors and smaller venturi's, and both produce less torque and horsepower and still have this same dip.
Looking for ideas on what to try to work out this flat spot. -chris Attached thumbnail(s) 
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Posts in this topic
chfrank Solex 40 PII Jetting Help Apr 8 2014, 12:30 PM
ThePaintedMan Larger jets affect mixture across the entire range... Apr 8 2014, 01:41 PM
chfrank
Larger jets affect mixture across the entire rang... Apr 8 2014, 02:06 PM ThePaintedMan Doh! Sorry, I read both your post and the grap... Apr 8 2014, 02:43 PM Racer Chris A type 4 engine with that rpm range will always ru... Apr 9 2014, 07:36 AM ThePaintedMan The man knows of what he speaks - I'm just now... Apr 9 2014, 09:59 AM brant I assume this is a race car?
I would work on exha... Apr 9 2014, 12:04 PM bam914
I assume this is a race car?
I would work on exh... Apr 12 2014, 08:24 PM  |
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