Re: HypoJets and O-tubes on the way
Posted: Thu Aug 23, 2012 8:57 pm
Thanks Simon. I like your float level method. I think it's the same level for the 151's?
Greg Z
Greg Z
The complete information source for Lotus Elan sportscars.
https://lotuselan.net/forums/
At the Feet of the Master
Traveled with my friend Hal yesterday from Chico to Martinez trailering my '76 Caterham Twincam to Keith's home garage. What a day! First, let me say, don't believe Mapquest. We got there a little after 9 and Keith hooked up his instrument to my newly installed O2 sensor bung and told me to drive for about 20 minutes. It turned out to be closer to 40 minutes with getting lost (can't blame Mapquest this time) Anyway, Keith entered the data into his program and made an initial determination for idle and main jets and emulsion tubes. We were slowed down a little by my having set one of the float levels improperly (never got the hang of the optical tool, even with Keith's demo) We tried several different "itterations" of e tubes, main and idle jets, test driving the car each time and reporting back to Keith.
Finally though, things came together and the motor smoothed out throughout the RPM range and seemed more tractable than it had ever before. I should mention we were working at Keith's home, my car is loud, and I hesitated to drive too enthusiastically for fear of offending neighbors and drawing unwanted official attention. However, on returning to my rural part of Chico, I unloaded the car and went for a short spin on the back roads. I was truly blown away at the car's performance. It idles smoothly, has very little hesitation in transition, runs smoothly at cruising RPM, and pulls stronger than it ever has to 7000. It's a different car! Striped assed apes and scalded dogs beware! Prior to taking the car to Keith, I was quietly trying to decide if I could sell it for roughly what I paid for it and move on to something else. Not for sale now, thank you very much.
Sorry to be so windy here, but Keith did such a great job and the difference in the way the car runs is so dramatic I wanted to share. I think it was vital though that Keith was there for the work. Had I been ordering parts, emailing or talking back and forth, etc. it wouldn't have happened. Keith says we can make it even better by correcting the position of the transition holes, but it's so nice now, I hesitate to touch ANYTHING. So, job well done! Next time I'll bring my tools (and my damned checkbook!) Thank you Keith, I enjoyed meeting and working with you and you are doing some truly amazing work on Weber carbs.
JJDraper wrote:First things first, subscribe to sidesraft central; establish all jet, tube & choke sizes; check/set float heights; check/set carb synchro (drilling a hole in the butterfly worries me!); then try these wonder jets!