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Old 03-07-2025, 03:48 PM
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Verdoro 68 Verdoro 68 is offline
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I'm going to install one this weekend. Any suggestions for a baseline curve for a stroker with a 236/242 and a 3000 stall and round port iron heads? A chassis dyno run showed that my engine is done by 5000 and torque maxes at 3750.

I'm thinking 12 initial, 36 total RPM in by 2900 with a 5300 rev limiter. As I understand it, the iron heads like more timing than their aluminum counterparts.

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'68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (build thread | walk around)
'74 Ventura 350
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  #2  
Old 03-08-2025, 12:19 PM
Singleton Singleton is offline
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Originally Posted by Verdoro 68 View Post
I'm going to install one this weekend. Any suggestions for a baseline curve?
The great thing about these is how easy it is to experiment with different settings from the drivers seat. My opinion is that it will idle better with a lot more initial timing (20's or more), and more timing (mid to upper 40's), at part throttle cruise in the 49-42kpa row @ 2200-2500 rpm will net a cooler running engine and better fuel economy.
Remember that this distributer cranks at 15 degrees no matter how high you have your initial timing set at.
Your wide open timing seems ok, but like i said previously, its simple to experiment with different settings, and you can make and store multiple timing charts to easily switch between them while driving

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Old 03-08-2025, 02:34 PM
ta man ta man is offline
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Quote:
Originally Posted by Singleton View Post
The great thing about these is how easy it is to experiment with different settings from the drivers seat. My opinion is that it will idle better with a lot more initial timing (20's or more), and more timing (mid to upper 40's), at part throttle cruise in the 49-42kpa row @ 2200-2500 rpm will net a cooler running engine and better fuel economy.
Remember that this distributer cranks at 15 degrees no matter how high you have your initial timing set at.
Your wide open timing seems ok, but like i said previously, its simple to experiment with different settings, and you can make and store multiple timing charts to easily switch between them while driving
Cranking is always at 10 degrees. I would suggest to double check your timing with a gun vs the display to ensure it is accurate. Raise up your rev limiter to 5500 to 5700 to get it well above your shift but keeps the engine safe. Have fun with the tunes. If you can get to the dragstrip it is great to tune your total timing. Just remember timing can affect the carb tuning at cruise and idle and vice versa.

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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2,generic one inch open spacer
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