 Spark and Fuel Maps for a 2056, MS and EDIS |
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| DNHunt |
 May 8 2005, 07:06 PM
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#1
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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  |
I finally got around to tuning my old engine in the car. Here's the results of tuning on the street. This is a crankfire ignition. Here's an old pick of the VR sensor mounting.
Dave Attached image(s) 
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| DNHunt |
May 8 2005, 07:07 PM
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#2
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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 |
Here's the timing Map
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| DNHunt |
May 8 2005, 07:10 PM
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#3
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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 |
It was really fun checking the timing with the light and the computer. I read the timing advance and Rpms off of the computer and checked against the marks on the fan
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| DNHunt |
May 8 2005, 07:11 PM
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#4
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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 |
The fuel Map
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| DNHunt |
May 8 2005, 07:12 PM
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#5
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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 |
The 3d representation of the fuel Map.
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| dinomium |
May 9 2005, 12:15 PM
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#6
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Git on a chair son, all the good stuff is goin over yer head! Group: Benefactors Posts: 2,777 Joined: 2-January 03 From: Bremerton, WA Member No.: 74 Region Association: Pacific Northwest  |
Kewl pix Dave...
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| mightyohm |
May 9 2005, 12:55 PM
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#7
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Advanced Member Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest |
Sort of off topic, but maybe I missed it, but what ended up being the problem with the motor last time you tore it down? How was it resolved?
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| DNHunt |
May 9 2005, 01:48 PM
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#8
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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 |
It appears there are several issues. Ultra rich during breakin causing oil dilution. Some clamping issues with a couple of the cylinders. Bad metal in the cam blank. We still don't have a final diagnosis. Parts are still out for repair or replacement. Both Jake and Charles have been great. To paraphase Jake. An engine's worst enemy is a fool with a 13mm wrench. Mind you he's never said that to me but the shoe fits.
Dave |
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| lapuwali |
May 9 2005, 02:06 PM
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#9
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
It's interesting you're running so much more advance at 600rpm than 1000rpm. What's the thinking there? Does it help with idle stability?
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| DNHunt |
May 9 2005, 02:49 PM
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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 |
The thought is to give it a little bump if it stumbles. I haven't needed it so I'll probably take the extra out.
Dave |
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| Mueller |
May 9 2005, 02:53 PM
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#11
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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for cranking, is the advance set at 15° then??? wouldn't the car start easier at say 10° or less?? |
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| DNHunt |
May 9 2005, 02:56 PM
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#12
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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 |
Cranking is 10. The engine is never down at 600. Like I said I'll probably take it out.
Dave |
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| TimT |
May 9 2005, 02:59 PM
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#13
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retired Group: Members Posts: 4,033 Joined: 18-February 03 From: Wantagh, NY Member No.: 313 |
Having that extra advance between 600-100 helps if engine starts to stall/stumble.
It also helps if you have a lightened clutch or flywheel. The extra advance gives the engine more torque, and can help it overcome tendencies to stall. Id leave the timing the way it is.. it will help if you have a rough idle, and the engine hunts. |
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| Mueller |
Jun 8 2005, 04:45 PM
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#14
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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Dave....any chance you know or can tell me what your injector duty cycle is at idle???
Mine right now is 3%.....I hope you don't mind too much, but I am using your values (tweaked somewhat (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) ) for my initial settings on my FI..... |
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| crash914 |
Jun 9 2005, 06:24 AM
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#15
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its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Mike, mine is around 5 to 7 ms. or is that duty cycle????
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| DNHunt |
Jun 9 2005, 07:05 AM
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#16
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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 |
Mike
With the 2.0l injectors pulsewidth is 1.7 with a 1.0 ms opening time. Duty cycle is 2.8 Good Luck Dave |
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