Volvo Owners Club Forum - View Single Post - 1800: - Mixture setting on HS6 carbs

blueosprey90 · Dec 12th, 2021, 13:14

My guess is that it is an error in the factory manual.

I run dual SU H6s. I've pretty much given up on the lifting pin method and on the alternate lifting piston method because I can't hear well enough to determine if my revs are rising or falling. Instead, I remove the dashpots and measure the distance from the top of the jet to the bridge with the slide on a vernier caliper. When they are all adjusted the same, I know my carbs are balanced. I usually shoot for 0.07" to 0.09".

I've been reprimanded for adjusting for leanness/richness by this method. I'm told that once I set my carbs, I should leave them alone and adjust lean/rich by changing my needles. But I'm mostly running at close to wide open throttle.

See step #9 here: http://www.dbraun99.com/SU%20Carbure...0tV-ZK8frtdV8M

Dec 12th, 2021, 13:14	#6
blueosprey90 Master Member Last Online: May 14th, 2024 20:47 Join Date: May 2017 Location: New Milford, Connecticut	My guess is that it is an error in the factory manual. I run dual SU H6s. I've pretty much given up on the lifting pin method and on the alternate lifting piston method because I can't hear well enough to determine if my revs are rising or falling. Instead, I remove the dashpots and measure the distance from the top of the jet to the bridge with the slide on a vernier caliper. When they are all adjusted the same, I know my carbs are balanced. I usually shoot for 0.07" to 0.09". I've been reprimanded for adjusting for leanness/richness by this method. I'm told that once I set my carbs, I should leave them alone and adjust lean/rich by changing my needles. But I'm mostly running at close to wide open throttle. See step #9 here: http://www.dbraun99.com/SU%20Carbure...0tV-ZK8frtdV8M