 I know I'm making this harder than it needs to be!, Timing Help!!!!!!!!!!!! |
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| computers4kids |
 Apr 15 2006, 03:58 PM
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#1
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Love these little cars!  Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None  |
OK, I've got my vaccumm advance plugged and my timing light hooked up with the inductive lead on cylinder 1. I've read the pelican article on timing and it contradicts my Clymer shop manual. Pelican says you time a 1.8 at 800-900 rpm at 7.5BTDC, while 1.7 and 2.0s you time at 3500 rpm. My manual says its 3500 rpm for all 4s??? Which is it??
Secondly, I'm having a difficult time finding TDC. With the cap off I've rotated the engine until the rotor is pointing at the TDC notch on the distributor. The marks on my housing/pulley are not to be seen. Is it suppose to be near the one flatten blade on the fan? Yes, I rotated the engine 180 degrees as well. Does this picture look like I've got the right idea for finding 7.5 BTDC? Attached image(s) 
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| Porsche Rescue |
Apr 15 2006, 04:11 PM
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#2
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Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
This might help
Attached image(s) 
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| Bleyseng |
Apr 15 2006, 05:28 PM
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#3
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
for a 1.8l it should be 7.5 degrees
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| Aaron Cox |
Apr 15 2006, 07:13 PM
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#4
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
you really need to be looking. the marks tend to be toward the rear of the fan (ie closest to the block) vs being on the pulley part. put a blanket down and lay on your trunklid to see.
it also helps to go get an adjustable timing light. it delays the spark X degrees so the only mark you need is the TDC. go get a thing of your wifes nail polish or a paint pen, find TDC and make it visible with aforementioned marking devices. then take the timing light, set it to desired advance, and rotate dizzyy until you see the TDC mark. |
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| computers4kids |
Apr 15 2006, 08:16 PM
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#5
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Love these little cars! Group: Members Posts: 2,443 Joined: 11-June 05 From: Port Townsend, WA Member No.: 4,253 Region Association: None |
QUOTE(Aaron Cox @ Apr 15 2006, 06:13 PM)  you really need to be looking. the marks tend to be toward the rear of the fan (ie closest to the block) vs being on the pulley part. put a blanket down and lay on your trunklid to see. it also helps to go get an adjustable timing light. it delays the spark X degrees so the only mark you need is the TDC. go get a thing of your wifes nail polish or a paint pen, find TDC and make it visible with aforementioned marking devices. then take the timing light, set it to desired advance, and rotate dizzyy until you see the TDC mark. After just getting my 914 painted, I just couldn't get myself to lay on the hood! I did use a mirror though. I looked for the mark in both notches, on either side of the fan with no luck...probably rusted over. Yes, I did buy a digital timing light that is adjustable so all I have to do is find TDC. There are no marks...I carefully spun the fan. I found the spot where it should be...it looked a little more shiny, and used it at least for today...it was pretty close. The 914 runs like a champ! I'll probably pull the valve covers and adjust the valves someday...and fix an oil leak...perhaps, watching for both valves I can better find TDC. I've never timed and engine with such a poor way of identifying its timing. Thanks for your advice, |
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| Porsche Rescue |
Apr 15 2006, 10:41 PM
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#6
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Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
The diagram I posted is very accurate. Note the flat wide bar (shown at the 32 degree mark in the diagram) and count 4 1/2 fan blades to the right to find TDC.
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| szuccaro |
Apr 15 2006, 11:28 PM
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#7
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ZUKE Group: Members Posts: 200 Joined: 27-June 03 From: Cameron Park, CA Member No.: 862 Region Association: Northern California |
Just installed electronic ignition and had engine tuned to the following specs.. runs great!
• Adjust valves: 3 – 4 thousandths • Installed compufire electronic ignition • Adjust timing : 32 degrees Full Advance @ 3 thousandths + Chrome Molly Steel Pushrods Stroker Crank 78 Stroker; 96 Bore Port matched manifolds 2 Liter heads with some port work |
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| Aaron Cox |
Apr 16 2006, 12:29 AM
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#8
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
QUOTE(szuccaro @ Apr 15 2006, 10:28 PM) Just installed electronic ignition and had engine tuned to the following specs.. runs great! • Adjust valves: 3 – 4 thousandths • Installed compufire electronic ignition • Adjust timing : 32 degrees Full Advance @ 3 thousandths + Chrome Molly Steel Pushrods Stroker Crank 78 Stroker; 96 Bore Port matched manifolds 2 Liter heads with some port work a mallory unilite and a mallory hyfire CDI will blow your mind........ |
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| Twystd1 |
Apr 16 2006, 02:47 AM
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#9
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You don't want to know... really..... Group: Members Posts: 2,514 Joined: 12-September 04 From: Newport Beach, California Member No.: 2,743 |
Chrome moly pushrods take ZERO lash last time I checked..
Twystd1 |
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| DNHunt |
Apr 16 2006, 06:45 AM
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#10
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Ditto on the chrome moly pushrods. Mine are set to 0 lash.
I added a little advance near and at WOT in the mid RPM range from the drivers seat. A few key strokes on the laptop and hit the burn button. Crankfire will blow your mind. Dave |
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| Aaron Cox |
Apr 16 2006, 09:15 AM
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#11
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
QUOTE(DNHunt @ Apr 16 2006, 05:45 AM) Crankfire will blow your mind. Dave (IMG:style_emoticons/default/owned.gif) (IMG:style_emoticons/default/sad2.gif) |
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| JoeSharp |
Apr 16 2006, 09:23 AM
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#12
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
QUOTE(Aaron Cox @ Apr 15 2006, 11:29 PM) a mallory unilite and a mallory hyfire CDI will blow your mind........ Yes but, Aaron how does it feel???? Sir, one zap, or two? :PERMAGRIN: Joe |
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