New Member from State of Kuwait

[1967coronet]

Welcome , lots of good information here.
Congrats on the Coronet purchase !

 

[1970coronetrt]

Yes, these engines have a lot of torque and power which is what makes them (in my opinion) so fun to drive. BUT, please recognize that with poor tuning, they can have poor performance. When you get a chance to work on the car, I highly recommend that you do some performance tuning. I will assume that you have very little experience with these engines. Maybe you will know all of what I write below, but hopefully some is helpful.

I will try to write this simply so the English is not complicated.

First, get the car running so it idles on its own and you can rev the engine to about 3500 RPM with the carburetor. Then you need to work on timing. The engine in your car will probably want about 36 to 38 degrees of total timing (above 3000 RPM and with vacuum advance disconnected). Your distributor mechanical advance should provide about 22 of those degrees. So that means your static timing (by turning the whole distributor) should be around 14 to 16 degrees. (Example: 15 degrees of static timing + 22 of mechanical advance = 37 degrees of total timing.)
But you need to make sure the timing curve of the 22 degrees from the distributor is a good curve. The distributor mechanical advance needs to start around 1000 RPM, and then needs to increase until eventually at around 2800 to 3000 RPM, it will provide about 22 degrees of extra engine timing. (Note that for a distributor, this is 11 degrees of distributor timing.)
Once this part is timed correctly, then you will need to work on vacuum advance, which also adds timing when the engine has high vacuum. Vacuum advance adds up to about 14 degrees of timing. Many vacuum pots can be adjusted with an allen wrench.
Once timing is set well, then further tuning of the carburetor should be done to make sure the car gets the right amount of fuel it needs.

What I have written above is very basic information. There is much more to know about these things and tuninig an engine. But hopefully this may be of help to get you started on the right path. If you choose to have your distributor done by others, there is a great vendor here @HALIFAXHOPS who can rebuild and recurve your distributor for you (I don't know how complicated shipping might be).

Good luck with your car and have fun!

Thank you sir for that very precious information


I know how to tune new engines but man these engines I know it will take a lot of time I think it's tune is good but how I know if it's OK or need tuning?

It's start and idle perfect driving it with low rpm I feel like it's running good did nit floor it yet only one time and the fuel cut I thing because the fuel was low

 

[Wyatt]

Welcome from the central coast of Cal.

View attachment 1686303

How classic is this pic? Awesome!

I have very similar memories from just up the road. We'd vacation in Cannon Beach, Oregon. Always in the station wagon.

 

[Belvedere408]

Welcome to the site, been to Kuwait a few times in 2003 and 2005. Nice bunch of folks there. Awesome car have fun.

 

[HawkRod]

I think it's tune is good but how I know if it's OK or need tuning?

You say it seems to run well now. That's great and gives you a head start. However, please know that some very good running cars have poor timing curves and therefore do not perform with as much power and enjoyment as they should.

I suggest a simple timing check. Do this by unhooking the vacuum line that goes to the vacuum advance. Then plug this line so you do not have a vacuum leak (the distributor vacuum advance can stay open). Now start and run the engine. When it is warmed up and running at idle (1000 RPM or less), measure the timing it has at idle. This is called static or base timing. Make sure you also understand timing numbers that are Before Top Dead Center (TDC) or After TDC. All your timing values that you want for your car will be before TDC. You will likely measure a value from 2 to 20 degrees before TDC for your base timing.

Once you have measured your base timing, rev the engine (in neutral). You should see that the timing begins to move to a larger before TDC number. For example, if your car has 15 degrees base timing, when you rev it is should start to become 16, 17, 18 and upwards. Rev your engine to 3000, maybe 3500 RPM. Measure the timing at that RPM. This should ideally be a value above 30. For example, let's say you measured 34 degrees.

Finally find out where the timing stops increasing. If your max timing is 34 degrees (as per the above example), what is the lowest RPM that the 34 degrees is achieved?

The numbers I provided in my previous post is very general. There are many conditions that may change the ideal numbers. But if you are at least somewhat close to those numbers then you will likely be OK.

Finally, before we get too much into details, this is a welcome thread. I suggest when you are ready to begin to test and tune your car that you start a separate thread.