Been A Long Time Coming....

[K4fxd]

There is t least one company that uses mega phones and tunes the sound kind of like a trumpet.

The knock sensors and other firing order dependent things are tunable.

You would need to change to truck cams, repin the coils and injectors, then the rest is possible in the available tuning software.

Caveat, I'm sure I'm forgetting something.

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[HKusp]

There is t least one company that uses mega phones and tunes the sound kind of like a trumpet.

The knock sensors and other firing order dependent things are tunable.

You would need to change to truck cams, repin the coils and injectors, then the rest is possible in the available tuning software.

Caveat, I'm sure I'm forgetting something.

What about the crank? Aren't the pistons in different positions, hence the different firing order because of the design of the crank?

 

[engineermike]

I believe the f150 and Mustang share the same short block. One time I layed it out and several different firing orders are possible with a single crank configuration. Some are obviously bad ideas but it turns out there’s 3-4 decent possibilities with any typical 90 deg crank.

 

[MAGS1]

To transfer the F150 firing order to the mustang would have a lot of, uh, challenges. Especially if you consider the individual cyl knock control, GDI timing, cam grinding, etc. Plus I really don't think the firing order change, short of an FPC, would change the sound much. The real reason the F150 sounds different is that the length of the exhaust from the head to the tailpipe is different for each bank.

In any 90 deg crank v8, the firing order is L-R-L-L-R-L-R-R, thereby having 2 cylinders on each bank on the exhaust stroke simultaneously. Since these have 90 deg of exhaust stroke simultaneously, the exhaust pulse at the collector comes through as one big pulse that, of course, alternates between banks. These big pulses exit the mustang tailpipe alternating evenly since the Left and Right banks have basically the same distance to travel to get there.

In the truck, both banks converge into a single pipe on the passenger's side, so the driver's side bank has a longer distance to travel to get there. This means that at times, the big pulses from both banks collide at the Y-pipe, combining to make one even bigger pulse every cycle.

Some like the sound of this, but in the case of a V6 it can sound rather nasty. This is why the latest Raptor and certain Jeeps have what they call a "trombone pipe" that just adds length to the passenger's side pipe by making an exhaust loop, evening out the piping lengths from both banks. IMO this sounds much nicer, especially with a V6.

I've actually been tempted to build something like this for my Roush truck to get it to sound more like a Mustang, but I see that opinion isn't popular in this thread.

I’ve got nothing to add to this thread, just here for the knowledge. But I’m with you Mike, I love the sound of the coyote in the Mustang. It’s unique. I was a GM guy for a long time before getting a Mustang, and I love how different the sound is from an LS or LT motor. All the pushrods sound too similar, nice to have something a little different. Just my opinion

 

[RAVAGE88]

I believe the f150 and Mustang share the same short block. One time I layed it out and several different firing orders are possible with a single crank configuration. Some are obviously bad ideas but it turns out there’s 3-4 decent possibilities with any typical 90 deg crank.

The best I recall, I believe the short blocks are the same as well.

MB

 

[GregO]

I get the sneaky suspicion PCM Tec could access the injector and coil firing assignment tables and no need to re-pin.
Really doesn’t matter no one will be changing the firing order but it would be interesting to know if it’s possible.

 

[K4fxd]

Really doesn’t matter no one will be changing the firing order but it would be interesting to know if it’s possible.

This would have to be answered by @Rolls

But I think it needs to be hard wired.

A 90 degree crank will put the same pistons at the top no matter the brand. The cam controls if it is TDC compression or TDC exhaust. I have always wondered what would happen if we had 2 cylinders firing at the same time. Probably need to have boost to get the cylinders filled, but it would be a fun experiment if I had the ability to grind cams from billets.

 

[GregO]

This would have to be answered by @Rolls

But I think it needs to be hard wired.

A 90 degree crank will put the same pistons at the top no matter the brand. The cam controls if it is TDC compression or TDC exhaust. I have always wondered what would happen if we had 2 cylinders firing at the same time. Probably need to have boost to get the cylinders filled, but it would be a fun experiment if I had the ability to grind cams from billets.

The cams are a steel forging not cast. I wonder if they start as solid round bar stock ?

 

[engineermike]

I think the cams are actually hollow tubes and the lobes are pressed on and crimped maybe(?)

Say what’s your firing order?

1 8 4=7 3 6 5 _ 2

 

[K4fxd]

As far as I know the cams are a round tube with lobes pressed on.

 

[K4fxd]

Say what’s your firing order?

Freiburgers favorite shirt,

1-8-4-3-6-5-7-2

 

[2morrow]

I get it. This is the only forum I'm on and there are certain periods that I'm not on for a number of months. There are a couple S550 FB Groups that I look at, but I don't look to glean much from FB.

MB

Don’t blame you, it’s troll central there.

 

[GregO]

I think the cams are actually hollow tubes and the lobes are pressed on and crimped maybe(?)

As far as I know the cams are a round tube with lobes pressed on.

Damn my steel trap memory had some rust, I've forgotten all about the low inertia cams.
Did some digging.
https://www.jandeengineering.co.uk/camshaftalignment.html
Are aftermarket Coyote cams solid bar and gun drilled or pressed lobe assembled cams, what Ford calls Composite Cam.

Now the million dollar question, what are the chances of the lobe moving out of phase ? If that happened could you imagine the time spent chasing that gremlin.....

 

[RAVAGE88]

A few more little things here and there to fine tune and I have to say, I'm really pleased with where it is after Phase 2. After various areas of refinement and a revised tune from @Wengerd Performance, I'm pretty anxious to get started on Phase 3. I'm expecting the Steeda H-Pipe within another week or so, but the cold start isn't sounding too bad with the Steeda X-Pipe. I know, the battery is weak, will have the new one on Friday.

 

[NGOT8R]

It’s gonna be deeper sounding with that H-pipe. Did you upgrade your clamps? The supplied clamps are very thin.

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