Possibly something the serpentine belt is spinning. Try removing the belt and cranking it. If that's not it, I second the thought that the starter is not disengaging.
Actually, the entire resonator body acts has the crossover. The photo shows the resonator guts after fiberglass packing removed, but it's clear that exhaust pulses are shared between the pipes.
Considering my 1989 5.0 made 225 hp, and my 2021 5.0 makes 460 hp, I'm guessing the engineers had to look for every hp they could find. And yes, both have some form of crossover.
It would definitely be interesting to see dyno numbers on the coyote with straight pipes on otherwise stock exhaust...
https://www.carid.com/articles/are-x-pipes-and-h-pipes-better-than-straight-pipes-on-dual-exhaust-systems.html
and
https://www.motortrend.com/how-to/1504-x-and-h-pipes-add-easy-horsepower-but-which-is-best-for-your-ride/
and...
I knew there was a reason for "sharing", but had to research the "why":
Due to crank design and firing order, most V engines (6 and above total cylinders) send multiple exhaust pulses down one pipe close together, causing back pressure. At the time these exhaust pulses are traveling down the...
Muffler delete and resonator delete without the ability to turn the volume down with AE would probably be a bit much for me. But, to each their own - go for it !
I put 255,000 miles on a '89 5.0 fox body that was burning a little oil (not bad), and still running strong when I traded it. I drove it like I stole it every day, but maintained it always. I see no reason the coyote shouldn't do the same or better.
I've got a C&L H-pipe (American Muscle) waiting for me to have time, and motivation to install. It's a lesser stainless (409), but it has the brace at the downstream end, and the cross pipe is the same size has the long pipes. Plus, it's under $150 before tax.
I used an AudioControl LC2i 2-channel signal converter and tapped into the rear speaker wires below the packing shelf (within trunk). The LC2i has a feature that turns on itself and passes 12v to your amp's remote On when the LC2i receives audio signal on the speaker wires. So, no need to find...
Another route:
Ford ECUs are available on the big internet auction site for approx. $250 (I think IDs would have to match). Some key/security programming would probably have to be done by a good automotive locksmith, or dealership.
With the above performed, you would have a choice of a)...
Wasn't thinking about the Brembo fronts when I suggested a C-clamp. So yes, GTP's dual plate spreader is the way to go. Unfortunately, most dual plate spreaders look to require removal of the caliper (somewhat defeating the purpose of the non-floating caliper with quick change pads). I did...
Yes, and that is what I do. But, that morning (here) might be 30 deg. or less, and that morning might be 70 deg. or more. That's likely 3 psi or more difference. Also, I've seen a 60 deg. morning go to a 90 deg. high, and I've seen that 60 deg. morning go to a 60 deg. high.
So, IMO, setting...
The door sticker says 32 COLD. Now, please define COLD?
I usually run 3- 5 over sticker. I find it a good compromise between best wear (5 - 8 over) and best comfort (sticker).
I installed a UPR 3025-02 on my first oil change. On that oil change My drain pan/container ran over because it was receiving more oil than it could drain into its container. Plus, I really don't trust the plastic plugs. The UPR plug I installed allows for controlled release of oil from the...