Printable Version of Topic

Posted by: 80cap May 1 2017, 02:15 PM

Anyone know of a engine tuner in Central Ohio? New rebuilt 2056 engine with
Dellorto, Web Cam, Etc. I have a misfire on number 3 cylinder. It is at 2 to 3 thousand RPM. and it is intermittent. It is on a run stand so everything is right in front and center. I would guess it is in the carb.
Brian

Posted by: North Coast Jim May 2 2017, 06:59 AM

QUOTE(80cap @ May 1 2017, 04:15 PM)

Anyone know of a engine tuner in Central Ohio? New rebuilt 2056 engine with
Dellorto, Web Cam, Etc. I have a misfire on number 3 cylinder. It is at 2 to 3 thousand RPM. and it is intermittent. It is on a run stand so everything is right in front and center. I would guess it is in the carb.
Brian

Posted by: Racer Chris May 2 2017, 07:46 AM

At that rpm on a test stand, an intermittent miss possibly means your idle jets are undersize.
It isn't possible to tune the main circuit without a significant load on the engine.

Posted by: 80cap May 2 2017, 08:37 AM

I swapped the carbs left to right and the miss and popping followed the carb. So I guess I need a Dellorto guy.
Brian