Gawd I Hate Points, Won't keep a tune |
|
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. |
|
Gawd I Hate Points, Won't keep a tune |
bbrock |
Sep 4 2021, 08:09 PM
Post
#1
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Quick background. Engine is a rebuilt 2L with Elgin cam and Weber 40IDFs. I bought a Pertronix Ignitor 3 to avoid having to mess with points but I could only get it to work well with a NOS Bosch 050 distributor. It runs rough with a brand new Bosch clone SVDA and the OE dizzy. However, the engine runs best with the OE DVDA distributor so I'm running that with points.
The problem is that I've had to adjust dwell and timing 3 times in only 1,000 miles of driving. Each time the dwell creeps up until the engine starts spitting and farting and is a bit hard to start when warm. Readjusting the dwell and timing gets it running like a top again. So (IMG:style_emoticons/default/WTF.gif) Only thing I can think is that the phenolic block on the points is wearing crazy fast. I lubed the cam and block with high temp slicone grease and I can feel it is still on there. Did I just get a shitty set of points? |
IronHillRestorations |
Sep 8 2021, 10:42 AM
Post
#2
|
I. I. R. C. Group: Members Posts: 6,719 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
Dwell is only for points and is obsolete with Pertronix. Is it possible the OEM distributor has excessive wear? Pertronix is a solution for that.
|
bbrock |
Sep 8 2021, 11:50 AM
Post
#3
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Dwell is only for points and is obsolete with Pertronix. Is it possible the OEM distributor has excessive wear? Pertronix is a solution for that. The only two tests I have for distributor wear are wiggling the shaft (seems tight and smooth) and measuring dwell through the full rpm range which using the procedure in Haynes (and I believe the FSM) to check for wear. Change in dwell is well under 1 deg across the rpm range so within spec. Also, I would expect bearing or shaft wear to cause erratic changes in dwell rather than the smooth progression of increasing dwell angle over time. Thanks for the clarification on dwell and Pertronix. I guess that makes sense now that I think about it. |
Lo-Fi Version | Time is now: 17th May 2024 - 06:30 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 ... |