It may be worth a bit of longevity and slightly increase power with some intake systems yet maybe not; until you test it. However, it for sure will be EXPENSIVE with a Ford Big Block.
It may be worth a bit of longevity and slightly increase power with some intake systems yet maybe not; until you test it. However, it for sure will be EXPENSIVE with a Ford Big Block.Hi all,
I've been doing some reading and I'd like to get some good advice on what to do. I have a '95 F-150 with the 5.0 Truck firing order (15426378)
(I know this is a BBF forum but you guys mean business and you really know your Ford engines) and I've been told that the 5.0 HO firing order (13726548) is worth some horsepower. I also heard that it is better for engine longevity (but the explanation for this wasn't totally convincing). Any thoughts or theory about this would be really appreciated?
I realize I'd have to change to a cam that is made for the HO firing order. Does the HO firing order have anything to do with exhaust gas pulses (similar to the reason Ford did the crazy "bundle of snakes" headers for their GT40 in the 60's)? Would keeping my stock type single pipe exhaust setup negate any gains to be had from changing the firing order (the only difference in my exhaust setup is a 3" in/out Hushpower Pro muffler and 3" piping? Even if there's only a small improvement I'd be interested in trying out the switch.![]()
Well, International V-8's were timed off of the number 8 cylinder.The Flathead firing order is interesting too but did you know that on the Flathead Ford while the cylinders are numbered the same as any Ford with number one in the front on the right side of the engine. BUT, number one is NOT the front cylinder of the engine! It's actually number 5 that's the one in the front isn't that weird?
Pontiac engines do something similar whereby number one is the front cylinder on the left yet the right bank is in front of the left bank.
Never said that FORD made it, have seen some with cams ground that way in a couple of different mud trucks. None of them would tell me who the cam grinder was.WoW, production 460's with the H.O. firing order ... I'd have to see that engine to believe it 'cause FORD never manufactured one.
wouldnt the crank have to be cut diff to? I asked a ford Tech about this once (frpp hot line) cause Im using a 5.0 efi harness on my build and Im allmost 100 percent possitive he said the crank would have to be cut diff to doesnt make sence to me though. I may end up having a new cam cut with the 5.0 H.O. firing order as comp cams can do this with no problems just call them and tell them what ya want...Never said that FORD made it, have seen some with cams ground that way in a couple of different mud trucks. None of them would tell me who the cam grinder was.
I was told by some smart guy some time ago that there are 8 possible running orders on a 90* V-8 there are only 3 that won't beat the engine to death.The crank configuration does not change. In a V8 there are always two pistons at TDC at the same time so either of those cylinders could be the one being fired with the other, it's running mate, on overlap. V8 cams have been ground that fire two cylinders at once, flat cranks have been used, all sorts of stuff that doesn't make much of a difference in the positive direction.
International V8's were timed differently but the cylinders were numbered and arranged conventionally.
So your saying I can run a stock 460 crank and have a custom cam cut with a late model (1989-1993) 5.0 H.O. cam firing order 1-3-7-2-6-5-4-8 and have no problems with it runing? If so Im very happy to hear this as with running sequential firing injectors on a efi set up this will help with my idle issues and make tuning ALOT easier. IF any one out there knows for sure please chime in...The crank configuration does not change. In a V8 there are always two pistons at TDC at the same time so either of those cylinders could be the one being fired with the other, it's running mate, on overlap. V8 cams have been ground that fire two cylinders at once, flat cranks have been used, all sorts of stuff that doesn't make much of a difference in the positive direction.