|
PMO balancing
Tried to post on Gordo’s PMO tuning thread to not create a new post but for whatever reason it wasn’t letting me, so, sorry if this ends up here then my attempted post on gordo’s thread also gets put up.
Seen a lot of info of people installing PMOs but the downside is a lot of it is older info that have now, dead links to websites that don’t exist any longer and photos that were originally hosted on photobucket and aren’t in the threads anymore.
Anyway, I recently bought a bank possession ‘88 911 so I got zero info on the car other than what I can visually identify. It has dual plug, MSD, PMO’s on it. Whatever life it had prior to me taking ownership, the carbs weren’t balanced at all when I received the car. It was idling warm at 1800-2000, backfiring thru the carbs, fuel pressure set to 6 psi, and VERY rough from idle to 3,000 before it did clean up some but would surge. A lot of that is now taken care of thanks to Keith @ EMPI, he talked me thru balancing them Left to Right and relieving some from linkages so the RPM didn’t climb when it was warm. When I balanced them L/R all I did was reference from the very back carb on each side. I will say that this did help drastically, however I do now notice that they aren’t balanced front to rear either and would like to take care of that.
I watched a couple YouTube’s on Webers but the balancing of each carb on the PMO seems to be different from a Weber. How does one go about balancing the PMOs front to back? I’d seen where the Webers have a shaft with a collar and set screws but the PMOs seem to be different and there are no manuals online that I can find and I hate to keep bothering Keith, if someone has photos they can post that would be great as well
|