I need some input here guys. I have my RB Dellorto on my ported 4port 13B and it's running extremely rich. If I set the mixture screw at 3 turns it seems like the carb loads up and the engine wants to stall. I can only get it to hold a steady idle with 6 turns(360) of the idle mixture screw. Is this normal because of the porting?


Thanks, Ed

 

What kind of 4 port? I have a 76-78 13B, and running a 45 DHLA. Have a look at this site for a "how to tune your Dellorto"

http://www.racecar.co.uk/dellorto/ca...ttors/dhla.htm

What kind of jetting are you running?

 

turn the air mixture screw clockwise til its almost dying, then back out a full turn (counter-clockwise) depending on ur idle jet. larger jet = less turn; smaller jet = more.

 

I'm using 12A plates(tall center ports) and 85 GSL-SE rotor housings and rotors. 48 DHLA with 75 idle jets as per Racing Beat.

Mel, I'll try that and let you know.


Thanks, Ed

 

you might want to ask drivefast7 what he is running on his repu's 13b. he helped me alot with jetting on my dhla.