Exhaust sound: Coyote vs Stroker 427

[Sunny66]

Trying to make decision between the "driveability" and "reliability" of the 5.0 Cayote vs a 450-550 HP stroked SBF. My Cobra would be a street cruiser only, and while I love some rumble, I don't want to have to wear earplugs all the time Heard a Cayote Cobra... at idle it was way too quiet and smooth, though it had a nice bark when you stuck your right foot into it. Any way to get some idle rumble into a Cayote while keeping driveability?

[Mark IV]

The Coyote by it's design nature will be different than a Windsor stroker but the Boss 302 version has the ability to use an alternate engine mapping that creates a "rumble" and "lumpy idle" sound.

The Coyote is sold at a attractive price point as a crate engine however the install costs are greater than a Windsor due to the extra work, electronics, etc. that are required to make it work.

[CobraEd]

there is no direct correlation between a nice Cobra like lumpy idle and overall loudness. The lumpy idle comes from the camshaft characteristics and the loudness comes primarily from the mufflers (although a really strong motor with high compression is generally louder than a mild motor)

So, get a SBF with a radical cam and keep the mufflers in the tame range and you can have what you want.


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[Dimis]

It's in the pipes. But... All pipes equal...

The sbf is a more rumble sound & the coyote more raspy, well at least to my ears.

If I had the choice b/w the two for street cruising - I'd go coyote, as long as I could install it without chassis and foot box mods.
But that's just me, and I'll bet I'm in the minority on this one.

[dlampe]

Just about any engine sounds good with the right exhaust. I chose the Coyote for my next GT40 project for a varity of reasons but certainly reliability was on the top of the list. I have spent 15 years working on engines (usually with webers) when I should have been driving. Computer managed, state of the art technology = fun and dependable.

[MRGEORGE077]

Originally Posted by dlampe

Just about any engine sounds good with the right exhaust. I chose the Coyote for my next GT40 project for a varity of reasons but certainly reliability was on the top of the list. I have spent 15 years working on engines (usually with webers) when I should have been driving. Computer managed, state of the art technology = fun and dependable.

Amen to working on rather than driving...EFI a good way to go.

[fordracing65]

Open headers...

[Sunny66]

Originally Posted by Mark IV

The Coyote by it's design nature will be different than a Windsor stroker but the Boss 302 version has the ability to use an alternate engine mapping that creates a "rumble" and "lumpy idle" sound.

The Coyote is sold at a attractive price point as a crate engine however the install costs are greater than a Windsor due to the extra work, electronics, etc. that are required to make it work.

Anyone here install the Boss 302 version of the Coyote and play with the mapping to get that "lumpy" idle? Have yet to see/hear it anywhere. Got to believe there would be plenty out there in cobraland who want the driveability of the coyote with the idle rumble that we all love with the more traditional setup.

[fordracing65]

That lumpy sound is just a program sold by a few companies, I heard a few discontinued it because of idle problems, but I'm sure they have fixed it by now, if you Google it there are tons of videos with it downloaded into Mustangs to get that sound from there computer program.. It's called a GHOST TUNE...

[Cashburn]

I prefer the sound of a 600hp coyote without a haunted house tune...

[itstock]

There are a handful of decibel readings throughout this site. You would be surprised at the sound level difference between pipes. The cam in my car is pretty "lumpy" as you say, yet at idle, the car is very quiet (quiet being relative) at 78 decibels. Other cars at idle, with smaller cams, were considerably louder simply do to the sidepipes. However, when you get on the throttle, they are all going to be pretty damn loud. I don't consider my car in the realm of having to wear earplugs by any means though. The loudness factor between a cammed sbf and a Coyote is not going to be all that different when compared through the same exhaust.

If you want driveability and reliability, it's going to be pretty tough to beat a modern day fuel injected engine like the Coyote.

[Sunny66]

For me, its less about all out decibels, as pretty much any V8 going thru side pipes will be loud. More about getting that distinctive lopey rumble at idle from a Coyote. However, been reading about the Boss 302 with track key activated. Seen a few Youtube clips and its amazing! Also seen clips with the Coyote ghost tuned, but it looks like the manufacturers of those items are no longer selling?

[Danr55]

I believe that generally speaking, a smaller bore engine will have a higher exhaust pitch than a larger bore engine. If you listen to an FE motor next to a SBF, you can certainly tell the difference. The low pitched rumble is what has always attracted me to the 427 Cobra. When it's right, you can feel it as much as hear it.

[Calbullet]

done with ecu tuning Insane Coyote Phantom Cam Lope - YouTube

[Wbulk]

Of course you know that lumpy idle sound is the sound of high valve overlap and unburnt fuel going out the exhaust at idle. The Coyote is high tech HP without the wasted fuel cost to get the sound. It's cheaper to buy the electronic sound.
OBD 2 V8 Engine Sound in Honda Civic - YouTube
V8 muscle car sound in Subaru Impreza - YouTube

Maybe someday we will all be driving electric cars with speakers playing V8 sounds to remind us of the good old days.

[blykins]

You can have your cake and eat it too....

The short deck mod blocks will go to about 5.3L, and 400 hp is pretty easy with a 2V, 3V, or especially a 4V head. Aftermarket cams will give you a real lope. Still EFI...

Working on a 327 modular engine right now that should be a good bit over 500hp, naturally aspirated....pump gas...EFI.

However, one thing that a lot of guys aren't considering is the cost of the Coyote, the cost of the ECU/harness, and the extreme cost of a supercharger if you want more than 400hp. In addition, the cost of adapting the Coyote to the car is another chunk of change.

Not sure what the appeal is.....is it gas mileage? Just the fact that it's new technology? Something different? There are known issues with the cam phasers on the 3V and Coyote engines. Don't think that Ford Racing will come and work on the engine for you in your own garage.

[fordracing65]

Originally Posted by Wbulk

Of course you know that lumpy idle sound is the sound of high valve overlap and unburnt fuel going out the exhaust at idle. The Coyote is high tech HP without the wasted fuel cost to get the sound. It's cheaper to buy the electronic sound.
OBD 2 V8 Engine Sound in Honda Civic - YouTube
V8 muscle car sound in Subaru Impreza - YouTube

Maybe someday we will all be driving electric cars with speakers playing V8 sounds to remind us of the good old days.

I wonder if I can get my big rumbling lumpdy lump Ford FE to sound like a 4 cylinder Toyota Camry...:CRY

[CobraEd]

Originally Posted by fordracing65

I wonder if I can get my big rumbling lumpdy lump Ford FE to sound like a 4 cylinder Toyota Camry...:CRY

sure, . . . custom grind a cam with .295 total lift at the valve and 200 degrees of duration. Then snake all of the exhaust thru a single pipe with tandem Caddy mufflers!


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[jpetran]

Go to the for sale tab and find my flowmaster exhausts. There is a complete description along with the video with sound that you can hear them.

[lippy]

Originally Posted by Wbulk

Maybe someday we will all be driving electric cars with speakers playing V8 sounds to remind us of the good old days.

BMW already does that on the new M5 BMW M5 generates fake engine noise using stereo | The Car Tech blog - CNET Reviews