2 Attachment(s)
Roger - aka "Mr. Falcon 2016"
Hello, Roger.
Quote:
Originally Posted by
Luva65wagon
As for the correct one of the replacement advances, they are not indicating what the differences are between them, other than the model numbers of the distributors. Your distributor should have a stamped Ford model number (something C2xx or C3xx), so perhaps you can find that.
I will take a look. Finding that number would allow me to match a vacuum advance to the distributor that I have. The distributor that is on the car now might not necessarily be the same as the distributor that originally came with the car.
Attachment 5867
Quote:
Originally Posted by
Luva65wagon
Sucking on the hose doesn't mean it is doing the job. Only means the diaphragm doesn't have a hole in it. You need to pull the cap and watch the plate move as well. Same holds true with the mechanical advance. And you don't know whether someone hasn't swapped out springs to change the curve. If the point plate is moving easily by hand as well, chances are the other bits will at least move it too - but it's good to check it both visually and watching the timing marks with the engine running.
Can a person suck hard enough to visually move the breaker plate?
I can move the plate with my fingers, but it seems to have some spring tension.
I have a transparent distributor cap. Should I be able to see the vacuum advance move the breaker plate if my wife revs the engine above 2000 RPM?
Attachment 5866
Thanks, Dennis.
16 degrees initial advance.
Quote:
Originally Posted by
ew1usnr
36 - 14 initial = 22 degrees of mechanical advance. That is greater than the 14 degrees maximum that the stock distributor is supposed to have.
Upon further study, I found that distributor degrees equate to double their number in crankshaft degrees. That was what the author that I quoted meant when he said "... how many distributor degrees it will pull in, double it to find the amount of crank degrees." So, the 22 degrees of crank advance means 11 degrees of distributor advance.
Since I do not know what is the advance curve my for distributor, I do not know how much distributor advance was contributed to the 14 degrees total advance that I had at 600 RPM.
I read that the advance at idle is not as important as what the total advance is while the car is moving. The important indicator was that I had 36 degrees total advance at 2500 RPM.
The engine ran great. It started easy, and did not ping.
In "How to Set Your Timing for Peak Performance", the author said "performance V-8 engines perform best when the total timing (full centrifugal advance plus the initial timing setting with vacuum advance disconnected) and is set to 36 - 38 degrees at 2,500 - 2,800 rpm."
So, I slowed the idle back down to 500 RPM and then moved the advance from 14 to 16, giving 38 degrees of advance at 2500 RPM.
I have been driving the car to work each day and the advanced timing has not caused any pinging or difficulty in starting the engine. The car actually seems to run a lot better. I cannot back this up with numbers, but the engine feels more lively and it seems to accelerate quicker. It feels like the engine has woken up and that the Challenger 260 has come alive. I step on the gas and the car jumps up and the exhaust makes a wonderful "WOOOOOO" sound. It is so nice. It is so much fun to press the gas and go that I find that I am driving more quickly now. I look at the speedometer and see that I am going 60 and have to slow down. The Wonder Falcon is performing like a sports car! :)