[EricF]

Hello, My name is Eric Fodge, I am a partner at Fodge Engineering, hopefully I can shed some light on this matter

Originally posted by HighPlainsDrifter



The old 289/302 firing order has been around for ages and the cams are a bit cheaper to put a jobber cam in instead of a 351 cam. That's it, money.


We installed a Clay Smith custom grind camshaft in the Engine in question, I pay the exact same amount of money, and charge the exact amount of money, for a 289 camshaft as I do for a 351 camshaft, So I call BS on your "That's it, money" claim.

Originally posted by HighPlainsDrifter



The power and emissions are better in a H.O. / 351 cam, that's the reason Ford changed it.
Perry.

Where are you getting your information, where is your "tech" to back up your claim? Do you have any, or are you just pulling this out of thin air?

Clay Smith Engineering has been in the camshaft business for over 60 years & the "Mr Horsepower" name is synonymous with High performance.

We (Fodge Engineering) have been a Clay Smith dealer for 30 years & we have a personal relationship with the owner, George "Honker" Striegel. We have literally designed 100's of camshafts over the years.

Clay Smith Engineering has done extensive dyno testing on various camshaft profiles, as well as various firing orders. They have found, through the results of their dyno testing that the "old" (15426378) firing order makes more power than the "new" (13726548) firing order.

As far as emissions are concerned, I have not done any testing regarding this. Automotive manufactures are held to increasingly tight emission standards, not HP limit standards, or another way to put it is that they will sacrifice HP to get better emissions, not the other way around, so I could make an educated guess that better emissions is the reason for the change of firing order.

Originally posted by HighPlainsDrifter



Either firing order will work. There is a problem with the old firing order. Cylinder 8 fires right after 7 , they are next to each other and cylinder 8 will run lean if you have a open plane manifold. The wilder the cam, the worse it gets, as the overlap for 7 will kill the intake charge for cylinder 8. so it's better in performance applications to use the H.O. firing order.
Perry.

With either firing order 15426378 or 13726548 you have 2 cylinders that are next to each other that fire consecutively (8 after 7 & 5 after 6) so once again BS on that claim.


I just got off of the phone with George from Clay Smith, to once again confirm my claim, like I mentioned before, he has done EXTENSIVE dyno testing & has dyno results that show 15-20 HP gains on a 351W by switching from 13726548 to 1542678 while maintaining the same exact cam profile.

Mr HighPlainsDrifter, how many camshafts have you designed?

How many high performance engines have you professionally built?

How much dyno testing have you done with camshafts?

Do you have any dyno results to back up your claim?


Thanks
Eric