Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 Engine Rebuilding Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Aug 2012
Posts: 47
Ignition timing

Hi, I have just completed my top half rebuild, and I would like to know how I set my ignition timing, I do not have a strobe. 1980 911 SC 3.0

I am aware how to set the timing with contact breaker, but mine is electronic.

I have positioned the pulley at 5 degrees mark, I have set my rotor arm so that the leading edge aligns up with the mark on the distributor body for no 1 cylinder. I do not know whether this is correct. Assuming the engine runs I will then borrow a strobe to carry out the final settings.

The books that I have read only seem to cater for contact breaker distributor.

Perhaps there is a post somewhere that details my dilemma.

Old 09-12-2012, 12:28 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,500
When you set your rotor to the notch, the points under it will be lining up. If youre not 180 out it will start. You rotate counter clockwise so the leading edge of the rotor should be lined with the notch
Bruce
Old 09-12-2012, 02:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 12,620
Garage
Initial ignition timing set-up.........

Set crankshaft pulley @ Z1 (compression) for cylinder #1 (both intake and exhaust valves closed and rockers' gaps @ 0.10 mm) and distributor rotor pointing towards the scribed marking on the distributor body. Engine should run and use stroboscope TL to fine tune the ignition timing.

Did you set the cam timing without the distributor installed for reference (orientation)? If you did the cam timing correctly with the distributor installed and using the rotor for reference, your ignition timing should be good to start the engine

Tony
Old 09-12-2012, 07:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered
 
Join Date: May 2003
Posts: 3,346
To get a precise timing you'll need a strobe. To get a "good enough" timing you can set the timing visually. Do what you did to get it close then do this: Look inside the distributor at the "fingers" that rotate and pass buy the static fingers. This is the magnetic pick-up. The ignition fires when the fingers make their closest approach. Turn the pully to the disired idle timing (I think you were using 5 degrees), Then adjust the distributor so the fingers on the rotating part line up with the stationary fingers inside the distributor. You will now have the timing set as well as you can without a strobe.

-Andy
__________________
72 Carrera RS replica, Spec 911 racer
Old 09-12-2012, 10:27 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Join Date: Aug 2012
Posts: 47
Ign timing

Thanks for your replies, I will try a start up tomorrow.

Old 09-12-2012, 10:35 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Reply


 


All times are GMT -8. The time now is 03:08 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.