Trick6
Jedi Hopeful
Offline
My three Strombergs were prepared by Jeff at PalTech and arrived with B1AR needles. The dyno showed these needles to be very rich and HP robbing. During the dyno pulls, the AFR reading went from 14.5 at 2000 rpm to 11 at 3200 and remained there to 5200. I tried to lean the mixture by adjusting them out (counter-clock wise) to the point that they were floating in the diaphragms. No major change on the dyno AFR reader. I could not believe that the needle adjustments did nothing but the tail pipe pickup sniffer was used and showed little or no change.
I have since installed the original size B1AF needles. The motor runs much better but the plugs are reading a wee bit lean. Now I can't enrich the mixture because these needles are screwed in full clock wise. I have not returned to the dyno yet. I now have a bung in the exhaust collector ready for a correct AFR reading.
I am preparing for another dyno session but I am wondering what you other triple Stromberg people are using for needles. Any recommendations?
I have since installed the original size B1AF needles. The motor runs much better but the plugs are reading a wee bit lean. Now I can't enrich the mixture because these needles are screwed in full clock wise. I have not returned to the dyno yet. I now have a bung in the exhaust collector ready for a correct AFR reading.
I am preparing for another dyno session but I am wondering what you other triple Stromberg people are using for needles. Any recommendations?