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JoshuaMark
01-21-2009, 09:39 PM
I know some teams are dabbling with this engine, as am I. Could someone talk to me about the odd fire tdc's of this engine?

L B0MB
01-22-2009, 08:27 PM
google is your friend

http://www.accessmylibrary.com...ry_0286-17362012_ITM (http://www.accessmylibrary.com/coms2/summary_0286-17362012_ITM)

one cylinder fires followed by the second cylinder 180 degrees later. after another 540 degrees the first cylinder fires, 180 degrees later the second cylinder, 540, 180, 540, 180, ect ect

JoshuaMark
01-22-2009, 08:49 PM
thanks for that info. I did get from using the degree wheel that #2 fires 180 degrees after #1, but when I enter 0, 180 in the Motec odd fire table, it does not run. In fact, it wants to run on 0, 90 rather.

PBnG
01-22-2009, 09:55 PM
Have you checked the CrIP with a timing light while cranking?

JoshuaMark
01-22-2009, 09:59 PM
while it was set at 0, 180 i determined my crip value with the timing light while cranking. it turned out to be 380. haven't had time to check the crip value again, but will first thing tomorrow.

PBnG
01-23-2009, 01:10 PM
These are really simple things that have been missed before. I would also be sure to check that the CrIP isn't 360 degrees out of phase. Enough timing advance to start an engine should be ~ 10 degBTDC. This is really simple, but ensure you have the timing light on cyl #1 when checking CrIP.

JoshuaMark
01-24-2009, 01:03 PM
Right, I have checked the crip with timing light on #1 cylinder several times and I come up with a crip of 400. What's weird is everything I've read and heard says that this engine has a 180 degree crank, which I've confirmed using a degree wheel, yet it does not run with odd fire TDC's of 0, 180 rather 0, 90-120. I'm trying to locate a 10mm piston stop tool so that I can truly verify the TDC of the #2 cylinder and actually make a nice mark on the flywheel. Also, there is a strange mark at 90 degrees ATDC on the flywheel. Does anyone know what this mark represents?

JoshuaMark
01-26-2009, 10:18 AM
So, I got the engine running on both cylinders with the odd fire table set to 0, 180. I hate to say this, but I really think it came down to some really fouled plugs, but I did make a very accurate, permanent mark on the flywheel for the #2 TDC using my awesome home made piston stop tool.