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Paul A Mathias is right

November 20 2017 at 1:34 PM
Paul  (no login)

Response to Re: Engine firing conundrum

Paul you beat me to it. Last night I drew a photo of the block and the eight cylinders, inside the cylinders I wrote down the firing order of a F motor, and then I rotated a Q motor to the same orientation with the flywheel back instead of front, and wrote down the firing order of the Q alongside each cylinder, which as you noted is backwards starting with the numbers 8 and 2 forward instead of 1 and 2 for the F.

Then when I followed the firing order of a Q, guess what? It was the same as the F only backwards due to the way I did it.

The thing a lot of people should be aware of, is the fact that Chris-Craft took a STANDARD ROTATION Q motor which uses the standard automotive firing order, and when they turned it around backwards Chris-Craft declared it a RH motor simply due to the fact that it was oriented in the boat that way with flywheel forward. For any mechanic in the shop, they don't know or care about the orientation in the boat, they just go by which way the flywheel is spinning. So if the motor being delivered runs, just record the firing order and be done with it happy.gif

As a point of information, looking at the power ratings for the 327Q and the 350Q, and wondering why the larger motor didn't have a power advantage, it's because the 327Q has higher compression ratio. Therefore the 350 should run better on fuel we have today and in theory should be understressed and last longer.

Regarding the cam gears, unles the motor is 1986 or newer, the cams all are cut the same way, the distributors all spin the same way due to the fact that a gear is used to control the direction the cam is spinning. The cam spins the same way on the standard or reverse motor, and the distributors are able to be interchanged. I ran into this when I ordered up a reverse gear on my 350 repower for the 327F, because it's a RH motor and much to my suprise it would not fit, and thats when I discovered there are NO reverse distributors for the F series (and I suspect the Q is the same but stand to be corrected on that if its not the case, since I have not personally been into a Q myself)


This message has been edited by FEfinaticP on Nov 22, 2017 1:19 PM

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