Tron84

I finally got around to getting my car on the dyno. Numbers weren't exactly what I was expecting, but I do realize dynos will vary greatly.
I should have got numbers when I was still stock.

We did 3 pulls, first 2 were running the Bama 91 race tune, the 3rd was running the C&L 91 Race tune.

The operator removed the 2nd pull from the dyno sheet, don't know why.

1st pull - 391.22/331.73
2nd pull - 395??/???
3rd pull 400.94/337.50

I was expecting more based off of others' numbers with similar mods;
JLT CAI
Bama/C&L Tunes
Kooks LT's
O/R X-pipe
Boss Intake Manifold

Another thing that surprised me was that the C&L tune FEELS like it has a lot more torque down low than the Bama tune so I was expecting to see some sort of loss up top. Turns out that's not the case at all, the C&L makes more power and torque across the entire curve, you can see the torque come on a lot sooner too.

Also, the A/F ratio of the C&L tune is much more consistent. The Bama tune runs kinds lean until 5K RPM, then goes kinda rich after that.

Overall it was a good experience and a fun time, will definitely be doing it more in the future.

Tron84

What effect does doing the dyno run in 4th gear rather than 5th make?
I was just watching the video I had taken and noticed that the wheel speed at the end of the run (~7300RPM) was at about 115MPH.
This would mean the runs were done in 4th gear.

What does this do to the #'s? 5th gear is 1:1 ratio on the MT82 right?

RedCandy5.0

Your #s will be lower when run in 4th. Surprised to see that much of a difference in power most tunes are just a couple of hp difference if any. Have been a lot of talk of the af on the Bama tunes.

ConeBoss

You always want to do your Dyno pulls in the gear that is 1:1 or as close as you've got to 1:1. Otherwise the results are skewed because gear acts like a multiplier when it comes to power output. I think most people do Dyno pulls in 4th, it's got a 1.14:1 ratio. 5th gear is closer to 1:1 at .87:1 but results will show less power since it's less than 1:1.

Your results do see a little low for the mods you have...I would expect closer to 430 RWHP. When I had just a tune and CAI as Mods that's what I got on a Mustang Dyno...which typically deliver lower HP numbers than Dynojet.

Tron84

Everywhere I've read says you'll see more power(more accurate) in fifth gear rather that 4th

TheDivaDanielle

Incorrect.

These are the Ratios of the MT-82 and it shows exactly why it should be in 5th.. because it's not a .87 gear which if I recall is what 5th is on some T-56's.

1st - 3.66
2nd - 2.43
3rd - 1.69
4th - 1.32
5th - 1.00
6th - 0.65

GrabberBlue5.0

Those are the ratios of the 6R80 not the MT-82.

Tron84

Does anyone have an actual transmission data sheet from ford?
I'd like to have something in writing when I go back, the guy seemed like the arrogant, know it all type. I can totally see him arguing about it

TheDivaDanielle

well it's been published in countless sources.... plus just simple math..

My GTO had 3.46 gears, and in 4th (1.00) on the dyno it turned 148mph @ 7000RPM.

my 3.31 Mustang in 4th will turn around 120mph @ 7000 RPM.

Not hard to figure that out. Not meaning to slight you at all, Just for performance manual transmission cars of this caliber it's odd to not have 4th be a 1.00 gear.

Biggest reason is that the majority of the performance RWD cars since the early 90's until quite recently had the Tremec T-56, and now the Tremec TR-6060 in which 4th is still a 1.00.

In fact, honestly, it makes hardly any sense that the GT would not have the Tremec TR-6060, but that's a little too much transmission for the v6 so thus the MT-82 which is good enough to handle both. Just had odd ratios.

TheDivaDanielle

Also for comparison sake......

Speed in each gear in a 2013 Mustang GT MT-82 Transmission with 3.31 Gearing and a 27" tire at 7000 and 7500 RPM
3.66 - 46/50
2.43 - 70/75
1.69 - 100/108
1.32 - 129/138
1.00 - 170/182
0.65 - 261/280

Speed in each gear in a 2013 Mustang GT MT-82 Transmission with 3.73 Gearing and a 27" tire at 7000 and 7500 RPM
3.66 - 41/44
2.43 - 62/66
1.69 - 89/95
1.32 - 114/122
1.00 - 151/161
0.65 - 232/248

Speed in each gear in a 2005 Pontiac GTO T-56 Transmission with 3.46 Gearing and a 26" tire at 6500 and 7000 RPM
2.97 - 48/52
2.07 - 69/75
1.43 - 100/108
1.00 - 144/155
0.84 - 171/184
0.63 - 228/245

Obviously the GTO has a shorter tire and a different gear than the other two, but the interesting thing is when you compare speeds at each shift point. I find it interesting that people find 3.31's too long, but I find them perfect, as for the first three gears, the shift points are quite close to what my GTO was. Also to note, when stock, my GTO only wound to 6500, and then the shift speeds were roughly the same as the 3.73 equipped Mustang. I'll take the longer legs and more speed any time.

For both I included stock shift points and then the typical points for a H/C car for the GTO and a Boss intake'd Mustang

db2797

Here's the spec sheet that has the ratio for the gears.
http://media.ford.com/images/10031/2...ngGT_Specs.pdf

Tron84

Thank you, THAT was what I was looking for

AMDanBailer

You definitely want to make the pulls in 5th so that you're 1:1. A bolt on 5.0 should make around 410 on the low side and 435 on the high side! Depends on the car, dyno, weather, elevation etc.. My 2011 GT with just our Bama Race tune loaded laid down 408 WHP on our in house Dyno Jet!

I hope this helps. Please let me know if you ever have any questions or need some assistance in the near future!

-Dan

ConeBoss

Ya, sorry for the misinfo...I quoted the Auto gear ratios for the 2012 GT.

Tron84

Almost 50 hp from just a tune? Come on...

joey8

He forgot to mention the 75 shot

steven46746

I seen a 2011 make similar numbers with a good dyno tune, not sure a canned one will get you there without a couple mods.

AMDanBailer

Yes.. This was obviously optimum timing. It was cool the in shop, door was open, fans were blowing and the car was barley at operating temp! This isn't going to be the norm, but it has been done, multiple times.

-Dan

racksteris

Sure we believe you..