carb jetting Q

[Rapid Robert]

360 eng rochester 2bbl. the dyno operator could not break it in because it was too lean, how many numbers should I bump up the jet size so I can order some appropriate jets & get it in the ballpark? thank you for your time. RR

 

[Professor Fate]

What jets are in it now? Hard to say what is needed until we know that...
Just get a kit with a selection of sizes so you can get it right instead of guessing at a size.
Pardon Our Interruption...

 

[Murray]

Too lean when? Low speed? Mid range? Top end? Does it correct when putting your hand over the carb? Now you will get a sense of where the lean spot is located and what to do about it. If high speed jump two jet sizes and re-check.

 

[Rapid Robert]

he said it couldn't be gunned wide open cuz it was too lean. I just happen to have 2 larger jets. thanks guys. RR

 

[ch1ll]

He didn't have jets? You need to find another dyno guy. That's the whole point of using a dyno, tuning. Knowing your data isn't going to win races.

 

[Rapid Robert]

yes it was not a good experience. do you know of a company that sells rochester jets. I had bought some prior from qhadrajetparts.com 908 4964188 but the call wont go thru & directory assistance information says it is a guys number

 

[PRH]

Rochester Quadrajet Metering Jets

Imo, If someone shows up to test an engine that requires something other than std Holley jets, they should expect to have what they need to tune their combo.