Finally got my GT Dynoed

[TX5OH]

Posted this in the dyno thread as well.

Finally got the car on the dyno. It was on a Mustang dyno, the shop did two pulls one that is converted to DynoJet Numbers and the other is Mustang Dyno numbers. Mods and Conditions are listed below. Longtubes and an Intake Manifold is next on the list.

Car Mods:
2016 GT Premium Convertible
A6 with 3.15 gears
JLT CAI (Stock 2016 IM and TB)
MBRP Muffler and resonator delete (Factory cats and manifolds)
47# Injectors and Shrader Performance E85 tune.

Test Conditions:
Temp-79.5 deg F, 53% humidity and air pressure of 29.53 inHg 50ft elevation
Pull was done in 4th gear since it is an auto

Results:

"Dyno Jet Numbers"
451 RWHP@6200
482 RWTQ@4100

Mustang Dyno Numbers
420 RWHP@6200
441 RWTQ@4100

My runs were done at nearly perfect SAE conditions, but the SAE correction adds about 5 hp.

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[Mach VII]

I thought the same. it is almost like the values are reversed...

 

[TX5OH]

I thought so too, but I emailed my tuner and he said nope. This is what he normally gets from his tunes with my setup.

 

[TX5OH]

I don’t think there is a 1:1 on this transmission. Lower gives a torque advantage. Hp shouldn’t matter much.

1.14 to 1 is 4th gear . Which might skew it some, but if this was the cause we would see it with all the automatics. I pulled the cam positions from my data log and put it in my engine software and it comes up with similar torque numbers as the Mustang Dyno pull.

 

[TX5OH]

Torque to hp conversion is right at all rpms too.

 

[K4fxd]

Care to post or PM your cam timing. Iv'e bracketed mine and will send you what I found to work the best.

 

[TX5OH]

Care to post or PM your cam timing. Iv'e bracketed mine and will send you what I found to work the best.

I’ll send you a pm.

 

[TX5OH]

1.14:1 should give a 14% bump since you have a torque advantage.

That would put you at 380 which seems closer than 441.

I have never seen a coyote that dynoed more Tq then Hp. Torque should cross Hp at 5252. Hp could care less except for a tad extra friction loss.

Then why aren’t all autos getting this bump? And tq and hp work out and cross at 5252. The scales are different on each side of the graph but they cross at the right spot.

 

[TX5OH]

I don’t have all the answers here. I am just saying your torque number most likely is not correct. Graph should look like this.

Notice rpm and tq cross at 5252.

Mine cross at 5252 as well.

 

[IconicFiveOh]

Mine cross at 5252 as well.

Are we looking at the same thing? Both of those dynos you posted seem to cross well before then.

Numbers seem a bit high to me.

 

[MKL_DS]

Dyno sheet from OP has different scaling for HP and TQ. Look down the left and right sides of the graphs. Not sure why some tuners do this but it drives me nuts since it keeps the graphs from lining up at 5250 but the values are correct nonetheless.

 

[TexasMetallic5.0]

hp = (torque x rpm) / 5252. When your rpm's are = 5252 they cancel out in the formula and just leave you with hp = torque. That is why they cross.

 

[WildHorse]

hp = (torque x rpm) / 5252. When your rpm's are = 5252 they cancel out in the formula and just leave you with hp = torque. That is why they cross.

Unless you do KW/NM then 5250 is irrelevant. Haha.

 

[Dominant1]

its an LS swap that's why the torque is higher then hp...lol

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