Are you closing off the outside carburetors by hand over the air scopes or over the top of the carburetor?
Tri Power Idle Circuit Changes For Bigger Cam?
- Thread starter 32witha409
- Start date
Existing fuel tube size is .027"
I probably did not do enough pre-tear down testing after reading all of your posts. I didn't have enough time between home projects.
I have the drills +.0022 (18%) and+.003 (24%) necessary to step things up, but my plan is to rebuild the center carb, inspect the ends and retest.
Based on those ultimate findings, I'll plan my next move if any.
Still might up size the pilots .002 but have not decided. I do know the cam is bigger, and that by is self should require some fuel curve changes not including the effects of alcohol in our pump fuel.
I probably did not do enough pre-tear down testing after reading all of your posts. I didn't have enough time between home projects.
I have the drills +.0022 (18%) and+.003 (24%) necessary to step things up, but my plan is to rebuild the center carb, inspect the ends and retest.
Based on those ultimate findings, I'll plan my next move if any.
Still might up size the pilots .002 but have not decided. I do know the cam is bigger, and that by is self should require some fuel curve changes not including the effects of alcohol in our pump fuel.
Went through all 3, installed rebuild kits. adjusted all required settings to spec. Set the auto choke as it was not set previously. I upped the idle fuel jet from .027-.0292 (#69 drill).
The cause as I see it was a loose throttle plate in the front carb, as well as it was poorly sealing at idle + the disconnected vacuum advance. With those fixed. After going through the carbs I was idling well and stable, much better than before and the throttle response off idle is better. The vacuum advance picked up 2-3 in/hg.
My test gauge and the gauge set in the car disagree so here are a couple of frames from videos I took.
Thanks for all of the help and good advice.
The cause as I see it was a loose throttle plate in the front carb, as well as it was poorly sealing at idle + the disconnected vacuum advance. With those fixed. After going through the carbs I was idling well and stable, much better than before and the throttle response off idle is better. The vacuum advance picked up 2-3 in/hg.
My test gauge and the gauge set in the car disagree so here are a couple of frames from videos I took.
Thanks for all of the help and good advice.
Much better vacuum at an idle,congrats.