Dyno run with the Coyote

[Paul2STL]

So a few weeks back I took my car to an event that a car club I belong Avants was having. They blocked off two days for us to come in and do Dyno runs at CarbConn Performance in Kirkland, WA. I kind of new what she would run by what Ford advertised the Gen2 Coyote was putting out at the crank in a Mustang GT and what mods I had on the engine. I was hoping to hit the 400rwhp, but new it was a long shot. I have long tub headers, tuned by Lund and of course after market intake other wise she is stock. I did three pulls on the dyno and they where very consistent with the top one putting out 389.39 @ 6700rpm and torque at 340 @ 5500. The torque had a nice long sweet spot from around 4500 - 5500. She was a screamer and when the rev limiter hit for the first time that scared the s#@$ out of me. Thought I damage my engine for a second :o. Here is a picture of the three pulls I did.

https://thefactoryfiveforum.com/attachment.php?attachmentid=145901&d=1617905106

[Railroad]

Congrats on some good numbers. If you are running the tire pressures good for roadster, you probably left some numbers on the table. You need a good firm sidewall and tire for accurate numbers. I would guess something in the low to mid 30#s would be OK.
I see you are running 3.31 gears. Those probably give up something on the street, but should be easy on the interstate.

[Mike DiGiorgio]

solid numbers, especially on Sea-tac grade fuel. the wobble at the top of the graph could be a valve control issue. i would debate on turning redline down to 6500 rpms since power falls past that point anyways. As above user stated, the 3.31 gears will make highway driving nice But since you have a t56 you have a LONG overdrive. i would consider a re-gear to something in the 3.73-4.11 range It would do very positive things for that engine/trans setup.

[Paul2STL]

Congrats on some good numbers. If you are running the tire pressures good for roadster, you probably left some numbers on the table. You need a good firm sidewall and tire for accurate numbers. I would guess something in the low to mid 30#s would be OK.
I see you are running 3.31 gears. Those probably give up something on the street, but should be easy on the interstate.

Was running around 23psi in the rear tires. Didn't thing about pumping them up some, good idea. I am running 3.73 in the rear now need to update my sig line. Swapped the diff out last year.

[Paul2STL]

solid numbers, especially on Sea-tac grade fuel. the wobble at the top of the graph could be a valve control issue. i would debate on turning redline down to 6500 rpms since power falls past that point anyways. As above user stated, the 3.31 gears will make highway driving nice But since you have a t56 you have a LONG overdrive. i would consider a re-gear to something in the 3.73-4.11 range It would do very positive things for that engine/trans setup.

We ran the passes in 4th gear right close to 1:1 ratio with 3.73 gears I have in her now. I wish I would have data logged the runs on my N-gauge maybe the tuner would have been able to get a little more our of her. But it was all in fun just to see what she put down. They said they tuned a bunch of cobras and this is one of the highest HP they have seen. Of course I'm sure most of those where probably carbed 302s or 351s.

[NiceGuyEddie]

This is interesting, I had no idea the Coyote motor had so much torque @3500 rpm and it's quite flat up to 6000rpm.

The dyno sheet looks a lot like my 347 Stroker except my horsepower drops off earlier.

If I ever built another car and did NOT do a Coyote it's because I'm a low-end torque kind of guy and not a high rpm kind of guy. I now know it's not an issue.

Thanks for posting!

[totem]

i would debate on turning redline down to 6500 rpms since power falls past that point anyways.

Yes and no. The Coyote has a soft rev limiter at 6500 rpm. It electronically decrease the torque past 6500 rpm. The hard rev limiter is at 7500.

If you ask your tuner to raise the soft rev limiter to 7000rpm, you’re likely to end up close to your goal of 400rwhp...

[GTBradley]

I have the gen 2 like you but a TKO600 and 3.55 rear and the tuner got mine to 401 hp and 380 tq. There might be a little to be gained if you wanted, but probably not something you’d notice except on paper.

[bobl]

Great numbers! Those dyno runs look very legit. Many chassis dyno runs are very subjective. You can see on the bottom of your chart the weather and correction factor. First they are using the SAE correction which is the most conservative. So numbers will be a bit lower than some other dyno tests. Secondly the weather you are testing in! Most parts of the country can only dream of air that good. The dyno is actually correcting negatively, which is below sea level atmospheric conditions. So the engine is actually making 3% more actual power than what is on the graph. For instance here in Central Texas when you correct for altitude and weather we are losing about 10%. Colorado is more like 30%.

Bob

[Paul2STL]

Thanks good info. I really didn't look into that info at the bottom. Yeah the weather that day was ideal with humidity low. I thought it was cooler that day but inside the bay I guess was warmer plus it was hot test we where shuffled in and out pretty quickly.

[Paul2STL]

I have the gen 2 like you but a TKO600 and 3.55 rear and the tuner got mine to 401 hp and 380 tq. There might be a little to be gained if you wanted, but probably not something you’d notice except on paper.
Yeah when I got the tune from Lund I just wanted to smooth out the ideal and have drive ability. I wasn't looking to increase the horse power but the 400hp number sound like a good round number i was hoping for. You are right probably not something notice except on paper. Coyote runs awesome and have had no problem out of her.

[Hoooper]

i would debate on turning redline down to 6500 rpms since power falls past that point anyways.

If you do a comparison using the transmission gear ratios to calculate actual torque at the trans output its pretty unusual to benefit from shifting anywhere other than redline unless redline is just drastically higher than where peak torque is made or the trans has really close gear ratios. Even with the very flat torque before peak and pretty quick die-off of torque over 6500 on this dyno he is best shifting at 7500 rpm if it makes 235 lb ft or more at 7500 if hes got the wide ratio trans, with the close ratio hes still best off shifting at 7500 other than the 4-5 shift that should be at 7200 for that rare 4-5 shift at 170 mph :D

[Mike DiGiorgio]

also solid numbers, however yours vs OPs could be taken up by temperature/fuel grade/dyno to dyno error. so i wouldn't worry about it to much

[lgordon]

I used a nearby Dyno tuner in Spokane, Washington. The results are in the chart below. I built my MK4 with a Gen2 Coyote - TKO 600 package prepared by Factory Give AT and IRS. 416 hp, 392 lbft



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