 1.7 upgrades?, electronic ign., swivel foot valve adj.? |
|
|
|
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. |
|
|
| orange914 |
  Dec 15 2005, 01:56 PM
Post
#1
|
|
http://5starmediaworks.com/index.html  Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California  |
id like to upgrade my points 73 1.7 to electronic ignition. what is out there for injected electronic ignition(injection is triggered thru second set of points in stock distributor... right?). ive had a .009 with pertronics, but that was for a carb engine. i would think theres a drop in dist.?
also where are the "911, swivel foot" valve adjustment peices sold. are they screw in or do you have to change more peices? any one selling the set up? does the stock computor "adapt" to resonable injector, engine breething upgrades or will they create "driveability issues"? lastly what weight oil does this engine operate best on(origanal well maintained 80,000ish mile wear) (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) |
   |
 
|
  |
Replies
| Dave_Darling |
Dec 15 2005, 05:58 PM
Post
#2
|
|
914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
|
Upgrading from points to electronic triggering in the stock distributor is pretty trivial. Well worth it, too, IMHO. Mostly because I really hate messing with points.
Upgrading the FI trigger points is non-trivial. Some of our engineering/fab types (Mueller, for one) came up with some electronic magic that lets a non-stock distributor provide trigger point signals. I don't know how it works, but supposedly it does indeed work. That's the only way I know of to replace the stock distributor while keeping the D-jet EFI. D-jet only copes with better breathing, bigger displacement, etc., to a certain point. Beyond that it gets really ugly really quickly. The breaking point is usually when you change the cam to anything that isn't very very mild. At that point, D-jet sorta gives up, at least at idle. Tuning the D-jet system is kind of an involved process. You have to tweak settings inside the MPS, then put it back together and run the engine. You also get to tweak the idle mixture with the knob on the ECU (unless your car is a 70 or early 71), plus the fuel pressure. All of the adjustments interact with each other, so changing one thing means you usually need to tweak everything else... You get to spend a lot of quality time with your dyno operator or driving around with your wide-band O2 meter. It can be done, but only up to a point... --DD |
|
|
|
Posts in this topic
orange914 1.7 upgrades? Dec 15 2005, 01:56 PM
Mueller a new improved triggering circuit should be done i... Dec 15 2005, 07:37 PM orange914 <... Dec 15 2005, 07:58 PM Mueller <... Dec 15 2005, 08:11 PM DJsRepS I bet the motor sounds a little different with tho... Dec 16 2005, 06:32 AM
Bleyseng It all depends on the valve lash. Once hot, the la... Dec 16 2005, 09:08 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 8th June 2024 - 04:25 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.