![]() |
|
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. |
|
![]() |
Gatornapper |
![]()
Post
#1
|
Senior Member ![]() ![]() ![]() Group: Members Posts: 1,267 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States ![]() ![]() |
Haynes Manual, page 65, Fig. 3.6, referenced from page 64, Pp. 6, #7: "install it so that.........an angle of 12 deg. .......with the small sector facing towards the outside of the car."
On my 914, the small sector is on the left. If I'm reading this correctly, this is ambiguous and does not clarify it "the outside of the car" is the Driver's side or Passenger side....... Can someone clarify this please? Or am I missing something (not the first time...)..... TIA, GN |
![]() ![]() |
Gatornapper |
![]()
Post
#2
|
Senior Member ![]() ![]() ![]() Group: Members Posts: 1,267 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States ![]() ![]() |
I understand totally that the timing is set wherever the dizzy is on TDC and the engine doesn't really care.
BUT, there must be some reason that the driveshaft location is clearly specified both in the Haynes manual on p. 65, Figure 3.6, and in the photo in Post #2, with a clear specification that the shaft is to be 12 deg. CCW from the driveshaft alignment. So my next (anal) question is: WHY is the 12 degrees so noted and specified???? There must be a reason. It will work just as well one gear tooth in either direction, I would think. How many teeth on the dizzy driveshaft at the bottom? The degrees per tooth are 360/# of teeth on driveshaft gear. TIA, GN |
porschetub |
![]()
Post
#3
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 4,816 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None ![]() |
I understand totally that the timing is set wherever the dizzy is on TDC and the engine doesn't really care. BUT, there must be some reason that the driveshaft location is clearly specified both in the Haynes manual on p. 65, Figure 3.6, and in the photo in Post #2, with a clear specification that the shaft is to be 12 deg. CCW from the driveshaft alignment. So my next (anal) question is: WHY is the 12 degrees so noted and specified???? There must be a reason. It will work just as well one gear tooth in either direction, I would think. How many teeth on the dizzy driveshaft at the bottom? The degrees per tooth are 360/# of teeth on driveshaft gear. TIA, GN The 12 degree's is a set point to locate the dizzy so the vacuum canister can clear parts on top of the engine like the cold start valve and the cooling flap rod,that position allowing for timing @ #1 TDC puts the dizzy adjacent to the breather tower. If you have a 009 for example it matters little as long as # 1 plug lead lines up with the distributor body notch @ TDC as you can turn it around and just reset your leads 1-4-3-2. One tooth out puts the dizzy out by 30 degrees as there are 12 teeth ok. The Haynes manual is a poor reference in many area's and this is one of them. |
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 9th May 2025 - 04:15 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 ... |