 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. |
|
|
| 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  |
   |
 
|
  |
Replies
| ThePaintedMan |
Mar 18 2014, 07:28 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 3,887 Joined: 6-September 11 From: St. Petersburg, FL Member No.: 13,527 Region Association: South East States 
|
Good to hear that you took care of the other unknowns first. That was the simple stuff. If you have never pulled the tank out, I'm sorry to say, that might be in your future to check the condition of the strainer sock at the bottom. Might be clogged up.
|
|
|
|
| David Stowers |
Mar 18 2014, 12:45 PM
Post
#3
|
|
Member Group: Members Posts: 99 Joined: 28-June 12 From: UK Member No.: 14,613 Region Association: None |
QUOTE(ThePaintedMan @ Mar 18 2014, 05:28 AM)  Good to hear that you took care of the other unknowns first. That was the simple stuff. If you have never pulled the tank out, I'm sorry to say, that might be in your future to check the condition of the strainer sock at the bottom. Might be clogged up. Even though I get full spec flow (30 secs for a litre) from the pump when I time it pumping out a litre at the carbs? I will pull the tank though as I've gone through everything else, it's driving me mad. Not that I need to drive it that hard but it's nice to know you can once in a while, that's the point of having it after all. |
|
|
|
Posts in this topic
David Stowers Fuel starvation when maxing out? Feb 10 2014, 07:01 AM
r_towle how are the carbs configured?
Is this a new issue?... Feb 10 2014, 07:17 AM David Stowers Hi Rich
What do you mean by configured? Theyre tw... Feb 10 2014, 07:29 AM gunny I sugggest getting a wideband air/fuel gage to mon... Feb 10 2014, 08:03 AM David Stowers Just looked up the wideband gauges, what's inv... Feb 10 2014, 08:27 AM gunny The Wideband O2 sensor needs to be added to your e... Feb 10 2014, 08:35 AM Krieger Does your distributor have the rev limiting rotor? Feb 10 2014, 09:39 AM
David Stowers
Does your distributor have the rev limiting rotor... Feb 10 2014, 11:42 AM David Stowers What model of fuel pump are others running? It see... Feb 10 2014, 12:07 PM ThePaintedMan Facet pumps, while cheap, are typically viewed as ... Feb 10 2014, 12:41 PM David Stowers
Facet pumps, while cheap, are typically viewed as... Feb 10 2014, 12:56 PM Jake Raby Float height is the first thing I'd go to.. If... Feb 11 2014, 01:03 AM David Stowers
Float height is the first thing I'd go to.. I... Feb 11 2014, 03:05 AM Jake Raby
Have any graphs? Were they plotting AFR? Feb 11 2014, 09:33 AM David Stowers
Have any graphs? Were they plotting AFR?
This ... Feb 11 2014, 04:04 PM David Stowers Ok, it's been a couple of weeks and so far I... Mar 17 2014, 05:15 PM McMark If you set float height, or if they do, make sure ... Feb 11 2014, 10:44 AM Jake Raby Compressing the ball changes it all.. I blow on th... Feb 11 2014, 10:59 AM yeahmag I think I set mine to 5-6mm closed per the CB Perf... Feb 11 2014, 03:32 PM David Stowers Wow! I'm trying to keep up but fear I... Feb 11 2014, 03:52 PM Tom Air to Fuel ratio.
Tom Feb 11 2014, 07:09 PM brant What brand of dyno is that? Calibrated?
How is th... Feb 11 2014, 11:44 PM David Stowers
What brand of dyno is that? Calibrated?
How is t... Feb 12 2014, 05:58 AM barefoot Got me thinking about my own Dello conversion (don... Feb 12 2014, 07:25 AM ThePaintedMan Some good comments here from folks with far more e... Feb 12 2014, 10:28 AM Intubator If the problem occurs at a consistent RPM regardle... Mar 17 2014, 05:25 PM stugray I read the title of this thread with the sun on my... Mar 17 2014, 06:22 PM Intubator
I read the title of this thread with the sun on m... Mar 17 2014, 06:40 PM David Stowers
I read the title of this thread with the sun on m... Mar 18 2014, 03:18 AM David Stowers Oh and one more thing, when hot and I stop in traf... Mar 19 2014, 04:47 PM David Stowers OK, so just incase anyone remembers or cares I was... Apr 13 2014, 03:08 PM brant wow...
that plug is a keeper
so glad you fixed ... Apr 13 2014, 03:25 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 2nd April 2026 - 12:54 PM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.