Fuel starvation when maxing out? |
|
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. |
|
Fuel starvation when maxing out? |
David Stowers |
Feb 10 2014, 07:01 AM
Post
#1
|
Member Group: Members Posts: 99 Joined: 28-June 12 From: UK Member No.: 14,613 Region Association: None |
My 914 is running a 1.8 (ish!) 40 Dellortos and recently recorded 111BHP and 121lbft of torque after a carb set up so yesterday I went to have a little thrash about.
A couple of times when the traffic cleared I really kept my foot flat down and pushed to over 100MPH on a slight uphill. It was still pulling strongly for a few seconds then seemed to lose power and splutter slightly. I backed off and it returned to normal. It seemed like the carbs emptied as if the fuel pump couldn't keep up. I had the heater on and the rich oily aroma changed to a hot sharp smell like it suddenly ran lean. It's running the small square facet pump mounted up front near the master cylinder. Any ideas please Thanks David |
gunny |
Feb 10 2014, 08:35 AM
Post
#2
|
Member Group: Members Posts: 205 Joined: 17-October 12 From: Madison Al Member No.: 15,051 Region Association: South East States |
The Wideband O2 sensor needs to be added to your exhaust at a point after all cylinders exhausts are combined. Mine is just before the muffler but after the resonator. You have to run the wire set to the gage in the console, I run mine thru the same hole as the speedometer cable to get it in the tunnel. I also added a Vacuum meter to monitor load, but your issue is at full throttle so load is high and vacuum is very low.
If you see that the mixture gets to lean at high RPMs then a carb adjustment would be required, maybe new Jets. Attached thumbnail(s) |
Lo-Fi Version | Time is now: 20th October 2024 - 06:55 AM |
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 ... |