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Big Al
Samba Member
Joined: June 14, 2014
Posts: 184
Location: Tucson, AZ
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 Posted: Tue May 22, 2018 12:01 pm Post subject: Ignition Timing |
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Working on a rail. No idea what the engine is in it but the numbers on the block cross to a 1500. Has dual port heads and a Dellorto carb. Was starting hard and pinging at high RPM. Put a timing light on it and it was at 48 degrees at RPM. So I figured the timing mark was off, found TDC and the mark is right on. So I backed total advance down to 30 degrees.
My question is assuming this engine is not stock, what is the maximum allowed timing? I'm assuming it's not stock because it runs better than my stock 1600.
Al |
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cbeck
Samba Member
Joined: January 14, 2014
Posts: 2495
Location: high ridge, mo
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| Posted: Tue May 22, 2018 12:31 pm Post subject: Re: Ignition Timing |
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For a 009/clone 28-30 at 3500 rpm. If distributor has a vacuum can then this may not be accurate.
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mr_bill
Samba Member
Joined: February 19, 2006
Posts: 1008
Location: City of Orange, CA
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| Posted: Fri May 25, 2018 5:03 pm Post subject: Re: Ignition Timing |
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28-32 degrees BTC, with dist vacuum hose plugged (if equipped) a 3-3500RPM
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wcfvw69 
Samba Purist
Joined: June 10, 2004
Posts: 13389
Location: Arizona
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| Posted: Fri May 25, 2018 5:20 pm Post subject: Re: Ignition Timing |
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You didn't note which distributor this is? Vacuum/mechanical or just mechanical. Either way, I'd time it to 30* with all mechanical in around 4k rpm. If it's vacuum/mechanical, do it the same but unplug the vacuum hose and plug it.
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Big Al
Samba Member
Joined: June 14, 2014
Posts: 184
Location: Tucson, AZ
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| Posted: Mon Jun 11, 2018 8:36 am Post subject: Re: Ignition Timing |
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Been out of town. I set the timing at 30 degrees at 3,000 or thereabouts.
Took it out and it runs good, starts a lot easier, no pinging. The distributor is a 009 or clone, no vacuum advance. Wish it had it.
Thanks guys, off to the next problem...
Al |
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