123 Install Today - GETTING CLOSER..., PROGRESS: BAD MPS |
|
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. |
|
123 Install Today - GETTING CLOSER..., PROGRESS: BAD MPS |
FlacaProductions |
Dec 14 2023, 09:50 AM
Post
#1
|
Senior Member Group: Members Posts: 1,733 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California |
74 2.0 D-Jet
Heading to the garage now to start the install and my main, unresolved-in-my-brain question is if i need to hook up the vacuum line that is on my current stock distributor, on the 123. |
technicalninja |
Dec 20 2023, 03:19 PM
Post
#2
|
Senior Member Group: Members Posts: 1,827 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
Ported only pulls vacuum when the throttle is just cracked. Once you start opening the throttle on towards wot, the vacuum goes away (as it does in the manifold) there shouldn't be any meaningful 'venturi effect'. I'm going to test this as soon as I find a vehicle with both types of vacuum; ported is rare now-a days. I don't think it's as simple as "doesn't function at idle" and is similar at all other points but a 60 second test with a couple of vacuum gauges will prove it for me... If so, why would you not want advance at idle? The car will both idle better and tip in throttle response should be improved. What this did was to push heat into the cylinder heads and exhaust in a mis-understood scheme to reduce idle emissions. It's not used in modern vehicles. I'll post what I find when I do. |
Lo-Fi Version | Time is now: 19th September 2024 - 03:37 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 ... |