TST/EZ Dyno Numbers

[ThomasLawrence]

Went to the dyno shop today, and did over a dozen runs, trying different combinations of TST Power, Torque, and EZ settings. Here are the numbers:

<table width=75%>

<tr><td>TST Power</td><td>TST Torque</td><td>Edge EZ</td><td>Max HP</td><td>RPM</td><td>Max Torque</td><td>RPM</td></tr>

<tr><td>0</td><td>0</td><td>0</td><td>300. 85</td><td>2983</td><td>561. 73</td><td>2639</td></tr>

<tr><td>1</td><td>0</td><td>0</td><td>328. 69</td><td>3039</td><td>615. 31</td><td>2749</td></tr>

<tr><td>5</td><td>0</td><td>0</td><td>425. 77</td><td>3028</td><td>746. 98</td><td>2943</td></tr>

<tr><td>7</td><td>0</td><td>0</td><td>470. 79</td><td>3186</td><td>776. 27</td><td>3186</td></tr>

<tr><td>9</td><td>0</td><td>0</td><td>394. 95</td><td>2968</td><td>706. 35</td><td>2773</td></tr>

<tr><td>3</td><td>3</td><td>0</td><td>401. 9</td><td>2928</td><td>712. 81</td><td>2725</td></tr>

<tr><td>7</td><td>3</td><td>0</td><td>477. 94</td><td>3186</td><td>788. 81</td><td>3174</td></tr>

<tr><td>9</td><td>3</td><td>0</td><td>403. 57</td><td>2848</td><td>720. 05</td><td>2778</td></tr>

<tr><td>7</td><td>7</td><td>0</td><td>480. 2</td><td>3162</td><td>797. 6</td><td>3162</td></tr>

<tr bgcolor=#EFEFEF><td>5</td><td>5</td><td>4</td><td>490. 05</td><td>3016</td><td>875. 95</td><td>2881</td></tr>

<tr><td>7</td><td>5</td><td>4</td><td>450. 54</td><td>3298</td><td>733. 38</td><td>2735</td></tr>

<tr><td>7</td><td>7</td><td>4</td><td>403. 34</td><td>3205</td><td>712. 4</td><td>2512</td></tr>

<tr><td>9</td><td>5</td><td>4</td><td>392. 02</td><td>2754</td><td>748. 79</td><td>2744</td></tr>

</table>



And here are the links to the dyno graphs:



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The maximum HP/torque figures are highlighted. What's interesting is that adding more fuel beyond this setting produced lower numbers (and lots of black smoke). However, the best run with the EZ at power level 0 produced a max EGT of 1037°F. The best run with the EZ at power level 4 produced an extra 12HP, an extra 87 ft. lbs. , and a max EGT of 950°F.



We also know that the TE setting doesn't really affect top-end HP (look at the 9/0/0 run and the 9/3/0 run - within 8HP, and the 7/0/0 and 7/7/0 runs - within about 9HP). Mark has stated as much in e-mails to customers (the TE fueling curve declines linearly towards 0 at 2900RPM). Given that, the difference with the EZ on is clearly visible: the 5/0/0 and 5/5/4 runs produced a difference of about 65HP, and somewhere around 80ft. lbs. , with a lower EGT.



The EZ was connected between the ECM and the TST. The TST had a direct connection to the MAP sensor. Reversing these didn't make much sense, since the TST fuels based on observed boost, so no runs were done with the EZ first in line.



The only thing that really troubles me (other than the fact that I missed my goal of 500RWHP by less than 10HP ), is the lower-than-expected torque, and the fact that torque didn't peak until high in the RPM range.



I guess this is just because the boost wasn't maxxing out until around 2500RPM or so, and by that time, the engine was out of it's torque band. My torque figures at the top of the RPM band are in line with Mark's dyno graphs, so I'm just chaulking it up to the fact that the larger DD turbo doesn't spool as quickly as the teeny stocker (but is capable of 40psi all day long, whereas the stocker likes to go BOOM! )



All in all, it was a good day at the dyno. HP numbers came in about as expected, and no holes were created in hoods, walls, ceilings, or people from unexpected shrapnel. Ya can't ask for more than that...



-Tom

 

[XcumminsX]

Awesome!!!! this is exactly what i want my truck to do!

 

[mattymac]

I dont know here? thats alot of money to not make 500 HP. I can almost add up $10,000 in aftermarket goodies in your truck. Im not puting you or your truck down those are good power #'s but dollar for dollar it dont look to good. Also look at run 7/0/0 its 470 and 776, and run 9/0/0 is 395 and 706, a drop of 65 hp and 70 tq. by upping the power by two.

 

[ThomasLawrence]

I can almost add up $10,000 in aftermarket goodies in your truck. Im not puting you or your truck down those are good power #'s but dollar for dollar it dont look to good.

True - there's a good chunk of change in there. However, the only real "power adders" are the TST and the EZ. The rest of the pieces are in a supporting role, making sure that 500HP (or 490HP ) doesn't trash the drivetrain.



If you want to make power, and make it reliably, this is what needs to be done. Oh sure, you can just slap on a fueling box and make similar numbers on a dyno... but you're not going to be able to use that power day in and day out for a vehicle's lifetime without seriously blowing something up.



No offense intended towards you, but there's just too much of this "Fast and Furious" rice-burner mentality of slapping a couple of parts on an engine, or plugging in a laptop and dialing in sick amounts of HP, without considering the effects that it has on the engine, transmission, etc. Heck, how many people have we seen here that don't even run the basic set of gauges because, "aw, that's too much money, and it doesn't make the truck go any faster".



Bottom line - you wanna play, you gotta pay. (That one was for you, Scotty )



-Tom

 

[Gary - K7GLD]

You'd have probaably seen that 500 HP if that dern Autoturbine hadn't been in there plugging up yer exhaust flow...



HEH HEH HEH... .

 

[robertyoke]

what dyno and what correction factor were you using?

on a dynojet w/correction factor set at SAE I put down 491hp & 1008tq with tst box on level 6 @ 5000 feet elevation.

 

[BCarmicle]

Those numbers are similar to mine. With TST on 6/6 and EZ on 4 I made 511hp. Strange thing is that my fastest ET has been with TST 4/4 and EZ 4. The higher levels are not usable until you get some more air to use all that fuel. I will be able to varify this in a coulple of weeks when I get my twins on. The anticipation continues...

 

[hotram03]

I made 451/883 before I ever installed my TST on a mustang chasis dyno, going for round two here in a couple of weeks, gonna try TST on 2/4 and 3/5 only, my egt's get crazy any higher than that.

 

[bzingre]

What kind of Dyno

Were these runs done on a dynojet or a chassis dyno that pulls the engine from top engine limit down to peak torque. I would suspect if these are acceleration runs in direct drive the torque values will be lower and at a higher rpm than actual.

 

[ThomasLawrence]

Yes, these runs were on a dynojet, with the TC locked and in 3rd gear (1:1). That's why the engine didn't have enough time to develop peak boost. The runs were only about 3-4 seconds long - that was from ~1500RPM to ~3500RPM.



-Tom

 

[robertyoke]

why not overdrive for your dyno run instead of 3rd. gear? If you dyno again use o/d and see if your #'s go up.



-robert

 

[Zer0hmZ]

Thomas,

Does this mean that your turbo has been able to hold up ok?

 

[ThomasLawrence]

Does this mean that your turbo has been able to hold up ok?

Yep - it's been just fine. I do need to get a larger turbo, though... I need more air to really use the box to it's full potential.

why not overdrive for your dyno run instead of 3rd. gear?

That would give the turbo more time to spool up, but I'd have to be running the engine at a high enough RPM to avoid downshifting back to 3rd at WOT. That would also defeat the purpose of trying to get an accurate measurement of peak torque.



-Tom

 

[Briman]

Take the TAG out and I bet you make the 500 HP! Too restrictive over 400 HP.