moddy
the mod
Ok, I don't know where to begin, I did a lot of things that weren't planned, they just became good ideas as I went. Once the tank was removed I explored the linkage for freedom of movement, alignment for the pull on the throttle from the servo and it's slack.
There was too much slack. Not that it shouldn't have worked, but the importance of the right amount of slack may not have been adjusted perfectly. Here's why. If there is too much slack at throttle rest, the first thing that happens when you're in 5th gear at 3k rpm, will be even more slack because you've slightly twisted the throttle for this speed. This I took notice of and made sure, before assembling everything again, there was a gnats wing of slack in the linkage of throttle and servo. To be sure I've conveyed this properly, once the throttle is all the way relaxed, the length of the servo cable is at it's most relaxed, so there is the most room for it to capture the speed and throttle up big long hills without disconnecting, something I've waited for to happen so far.
So, basically by taking up the initial slack, there is a lot less the servo has to work for adjusting speed going down the road.
The next most astounding thing that happened is, I decided with the tank removed to connect a vac gauge to a test port in my vac system for cruise. Running the engine before the tank went back in, if I found out there was a vacuum issue would take a lot more time to get it apart again.
20 inHg at 3k rpm. I couldn't believe it. All tests before were in the 10 to 12 range. I don't know where it came from but being connected to cylinder 3 has given me a lot more confidence that it won't be a vac supply issue and shouldn't have to make a larger vac container. When I shut the engine off the gauge showed no leak in the system 5 to 10 minutes later. Won't go on a test ride for 3 more hours.
There was too much slack. Not that it shouldn't have worked, but the importance of the right amount of slack may not have been adjusted perfectly. Here's why. If there is too much slack at throttle rest, the first thing that happens when you're in 5th gear at 3k rpm, will be even more slack because you've slightly twisted the throttle for this speed. This I took notice of and made sure, before assembling everything again, there was a gnats wing of slack in the linkage of throttle and servo. To be sure I've conveyed this properly, once the throttle is all the way relaxed, the length of the servo cable is at it's most relaxed, so there is the most room for it to capture the speed and throttle up big long hills without disconnecting, something I've waited for to happen so far.
So, basically by taking up the initial slack, there is a lot less the servo has to work for adjusting speed going down the road.
The next most astounding thing that happened is, I decided with the tank removed to connect a vac gauge to a test port in my vac system for cruise. Running the engine before the tank went back in, if I found out there was a vacuum issue would take a lot more time to get it apart again.
20 inHg at 3k rpm. I couldn't believe it. All tests before were in the 10 to 12 range. I don't know where it came from but being connected to cylinder 3 has given me a lot more confidence that it won't be a vac supply issue and shouldn't have to make a larger vac container. When I shut the engine off the gauge showed no leak in the system 5 to 10 minutes later. Won't go on a test ride for 3 more hours.