Target AFR at Idle/Cruise with carbs |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Target AFR at Idle/Cruise with carbs |
yeahmag |
Jun 23 2011, 09:21 PM
Post
#1
|
Advanced Member Group: Members Posts: 2,424 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
I was reading a thread on carb tuning that John Connolly of aircooled.net was on and he suggests a much leaner idle/cruise AFR than what I've been running. I've set a target of 12.5-13.5 in that range, but he suggests you can go much leaner than that.
This may also explain why Jake thought I was nuts when I went from a 60, to a 62, and then finally a 65 idle jet on my 40 Dellorto's. Does anyone have any real world insight on this? I've loaded in my 60's for a ride tomorrow... -Aaron |
yeahmag |
Jun 24 2011, 02:48 PM
Post
#2
|
Advanced Member Group: Members Posts: 2,424 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
Just got back from a small drive. Maybe 5-6 miles up a grade in 5th gear. Metrics were:
180F oil (not fair though, I have a cooler and a fan) 350F #3 head (temp compensated aircraft grade gauge) 14-15:1 AFR at cruise uphill The car felt great both just off idle and at cruise. No hesitation at all. What I am seeing is that it exacerbates my leaky slipjoint collector and doesn't like to idle until all the temps even out. Tends to pop and snap out the tail pipe like a Harley. |
Lo-Fi Version | Time is now: 13th June 2024 - 02:33 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |