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OK, Hope I'M not missing somthing so as not to sound stupid, but with tr4's not having a timing mark, after putting in a pertronix distributer how do you set the timing? I adjusted the valves...she fires right up... vaccum gauge holds steady at 12lbs...RPM'S at 650... does that mean i'm done?
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timing ?
- Thread starter mtlman8
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poolboy
Yoda
Online
If the cam is stock, sounds like you need a little more advance if it's only reading 12 in-Hg.
The engine might tend to run hot like it is.
17 to 18 in-Hg would be more like it and your engine will be more peppy beside.
But you can deduct 1 in-Hg for every thousand feet above sea level.
https://automotivemileposts.com/garage/v2n8.html
The engine might tend to run hot like it is.
17 to 18 in-Hg would be more like it and your engine will be more peppy beside.
But you can deduct 1 in-Hg for every thousand feet above sea level.
https://automotivemileposts.com/garage/v2n8.html
Geo Hahn
Yoda
Offline
I think there should be a timing mark -- its a hole in the back lip of the pulley on the crank and is supposed to be TDC.
That said -- if your timing seems pretty good then perhaps you're ready for the next step which is dialing in the exact timing by driving the car and seeing under what circumstances you can induce pinging/knocking. Should get a slight ping if you're driving around 30 mph in 4th gear and the accelerate (not good driving, just trying to see what the engine does under an extreme load).
Others may have different techniques for final adjustment.
Once you're happy with it, it is worthwhile to go back to the timing mark so you know where you ended up (and then write it down on a 3x5 card that you can later wonder what you did with).
That said -- if your timing seems pretty good then perhaps you're ready for the next step which is dialing in the exact timing by driving the car and seeing under what circumstances you can induce pinging/knocking. Should get a slight ping if you're driving around 30 mph in 4th gear and the accelerate (not good driving, just trying to see what the engine does under an extreme load).
Others may have different techniques for final adjustment.
Once you're happy with it, it is worthwhile to go back to the timing mark so you know where you ended up (and then write it down on a 3x5 card that you can later wonder what you did with).