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HudCo 
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Joined: 29 Jan 2013
Location: Plymouth Utah
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 Topic: timing
Posted: 04 Aug 2025 at 4:30pm |
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where do i want to run my timing at 2000 rpm g226 175 cam big valves big carb high ratio rockers 12.5 :1 compressoin , just got it fired up last night on the fire mark on the flywheel have not started to tune it or put a timing light to it yet
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PaulB
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
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Posted: 04 Aug 2025 at 6:00pm |
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A dyno will tell you exactly where the sweet spot is.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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HudCo
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Location: Plymouth Utah
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Posted: 04 Aug 2025 at 6:32pm |
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no wheel dynos around and no pto , will use a vaccumm gauge timing light and a o2 sensor was just looking for some closer paramiters
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DrAllis
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Joined: 12 Sep 2009
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Posted: 04 Aug 2025 at 8:31pm |
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The flywheel should have had some extra marks added to it to make this easy. The "F" or "FIRE" mark is 30 degrees BTDC on a WC-WD-WD45. So, it would have been pretty easy to make marks for 15 degrees (half-way between TDC and 30 BTDC) and 20 degrees BTDC. I'd guess you will be 20 to 22 degrees BTDC at full throttle. That's exactly where I would put it even before a Dyno test.
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DrAllis
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Posted: 04 Aug 2025 at 10:06pm |
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AND USE AT LEAST 110 octane or better fuel !!!
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HudCo
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Posted: 04 Aug 2025 at 10:21pm |
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i got 110 in it tomorrow i will get it at 22* at 2000 rpm and start working from thier
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DrAllis
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Posted: 05 Aug 2025 at 6:34am |
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I'd probably lean towards the 20 degree number to start.
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HudCo
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Posted: 05 Aug 2025 at 9:48pm |
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thanks Dr. put the light on it was dead on the fire mark, the throttle response was pretty dead , put it on 20 and picked up 100 rpms put it at 2100 and give it some good throttle response made it snappy , so know i am on my way to fine tuning still havent moved it under its own power yet
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DrAllis
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Posted: 06 Aug 2025 at 7:53am |
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What you absolutely don't want it ANY kind of detonation under load. I don't know which carb you are using, but if it's a G-226/W-226 Marvel Schebler, I'd drill out the removeable main jet inside the bottom of the bowl .002" or maybe .003" to give your carb more fuel delivery. As it is, your adjustable "L" external main jet will be screwed out several turns which then is maxxed out by the jet size in the bowl. This is sized for 226 cubes at 7 to 1 compression, so a little more fuel flow would be prudent. I've always used colder AC Delco 42 or 43 spark plugs, not 45.
Edited by DrAllis - 06 Aug 2025 at 7:54am
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HudCo
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Posted: 06 Aug 2025 at 8:10am |
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new zenith for a d 19
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HudCo
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Posted: 06 Aug 2025 at 10:46pm |
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