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DHLA 40E jetting for 1400 8v


vovka

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Hello.

Please advice me for correct jetting on Dellorto DHLA 40E (5 progression holes).

 

Engine:

1.4 (79mm bore, 71mm stroke)

306 degree camshaft, 2.5mm LATDC.

4-1 exhaust manifold, 51mm pipe.

 

Carbs jetting:

idle 7850.2/52  (little lean, AFR=14.7-13.8 from 1000 to 3000)

 

32mm chokes

.2 venturi

.6 emulsion tube

155 air corrector

118 main jet (maybe very lean on the high revs, but currently i'm not rev up the engine more than 3500 rpm.  only 150 miles after engine rebuild.)

40 pump jets.

 

 

Also i have  emulsion tube 7772.7, aux. venturi 7848.1, idle jet holder 7850.1, and many jets.

Will work correctly  .2 venturi with  .6 emulsion tube ? maybe .1 venturi will be best ?

 

 

I want tune carbs for long progression (currently engine is little stumble around 3000 rpm).  Please help me. Thank you.

 

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