Help! Which airscrew is the standard?

[RCinNC]

Hello all...I'm in the process of syncing my throttle bodies. Carb Tune is hooked up, all is ready to go, but I've looked at both throttle bodies and I don't see white paint on either airscrew adjustment. I know one of the throttle bodies is the standard and isn't to be adjusted, but I can't tell which one that would be. Is there another way to tell? I don't want to just start twisting things and make things worse.....

 

[Bryce]

I don't think there is another way. it could be either side.
mine is the left. it's hard to see the white paint, but it's there in the recess with the screw. on the right side, it's easier to see the screw and obvious that there's no paint on the right side on mine.

 

[RCinNC]

Thanks Bryce. I took another long look at the screws, convinced myself that "yeah, that could possibly maybe probably be white paint on the left airscrew" and I adjusted the one on the right (after I marked its original position in case I was wrong). It seemed to work, and the throttle bodies snyched up with the Carb Tune, so my 50/50 guess must have worked out.

 

[caillou]

Mine was pretty easy to identify...

 

[roy]

Mine was the right. After my first valve adj at 26k I no longer could use the right one as the standard and bottomed out had to switch to the left one as bottomed out to achieve a balance adjustment. Don't think it matters as long as one is bottomed out. My exhaust valves were all right and cams had to be removed so I attribute the change in manifold pressure from adjustment as the reason the right one wouldn't work as the standard anymore. Either way the TB is in sync using the left one as the standard.


Early on back in the beginning I tried the 3/4 turn out on the right one like everyone was doing here and I could get it synced that way but didn't quite like the feel. Went back to at least one screw bottomed out per the manual.