Opinions on Dyno results???

[Digger]

Yesterday, I dynoed my truck at Payn Tech. in Troy, Michigan. They have a Mustang dyno (more info. in the comp forum). I ran comparing the Edge ez FUEL BOX vs. TS Performance Ramifier FUEL BOX. I thought that I would have seen better results with the ez. I understand that I have several other mods (listed in sig. ) that may have played a factor in the results. I have seen other places that have claimed 460-480hp with the mods I have, running the EZ. Is it a big difference if the numbers are obtained by running on different dynos? I was also told that tire size (35x12. 50) could have been a factor, mass, speedo calibration. Overall I am happy with my results, there were several other trucks there and I faired pretty well considering I HAVE NO TIMING BOX yet . Thanks for the opinions.



Edge EZ level 4

420. 4@2750 RPM

853. 3@2250 RPM



TS Performance Ramifier

461. 5@2750 RPM

945. 1@2250 RPM



Dan

 

[XcumminsX]

Nice numbers

 

[Digger]

Thanks for the opinion XcX.



Dan

 

[jungledave]

Wow. i am sure the tires did take away from the numbers .

I still haven't figured out how to do my profile yet. kinda plain comp[ared to the rest of ya.

 

[KLockliear]

What did it dyno stock on that dyno? 420 with the EZ and your setup does sound a bit low, but I have seen the Mustangs read all over the place.



How much did it dyno with the box off? Be careful using a pressure box that will give more than 75hp gain by itself.

 

[Digger]

Keith, I was under the impression that I could not run with the box off with the injectors because of the boost module, so I have no numbers like that. If that is possible, I will have to try it next time. What type of things should I watch out for with a box making over 75hp?



Thanks Dan

 

[d90boy]

It's been my experience that Mustangs and dynojets give significantly different numbers. It seems to me that the dynojet gives a higher HP number. The two work in different ways so maybe that explains the different numbers. I feel that the mustang is a little better for a turbo diesel truck since it can place a load on it rather than just doing acceleration. I would think that would give a better picture of what the truck can do in the real world like towing.

 

[Digger]

The dyno was a Mustang AWD-IMP in ground dyno. I know the AWD stands for all-wheel drive, but what does the IMP stand for?



Dan

 

[Joseph Donnelly]

I find the Dynojet to be much better for us because you don't lose hp on friction and slippage at the rollers, and the Dynojet calculates hp directly instead of fudging it from torque, a harder number to measure accurately.

With your mods, I would not have been surprised to see up to 500 hp, but if it is cold and the engine is not warmed up, the numbers can be 30-50 hp lower.

So between the Mustang and the temperature that is probably low in Michigan, your numbers are reasonable, although not what you expected.

 

[XcumminsX]

i dont understand why the 35" tires took some power away. .



Anyone want to justify this for me?



nick

 

[Steve M]

What I find interesting is that your torque peak is at 2250rpm. This kinda goes along with seat of the pants feel when towing a heavy load. My truck pulls way better at 2250 than it does at 1600rpm even in the same gear with wind resistance giving 1600rpm the advantage. My truck is bone stock but I've read several times of 2100rpm being the sweat spot with these engines.

 

[Digger]

Thanks for the reply Joe. In between runs the engine idle would kick up to keep it warm.



Also there were some 12 valves there whose TQ numbers where higher than mine but HP was lower. Why is this, and would you rather have a high HP number or TQ number? The reason I ask this is some people were saying that HP's don't matter that torque is where it is at.



Thanks Dan

 

[Digger]

These runs were maid in fifth gear if that matters.



Dan

 

[Digger]

XcX, I remember seeing on the competition forum that Rob Thomas had dynoed with different tire sizes. I don't think it maid that big of a difference. That is just what I was told at the dyno day.



Dan

 

[KLockliear]

First Dan, if you have the EZ box and not our TTPM, there is no "0" setting... sorry. If you unplug the rail pressure plug, the box gets no power and doesn't work, so don't do that. You would need our version, the TTPM to have the zero level to try that, or a boost module only, which we only sold about 10 of.



Second, if the box by itself makes more than ~75-80hp gain, the rail pressure is being pushed to the point where the relief can actuate... and once it does, the spring sacks out and the power just keeps falling off. With injectors though, it will likely show more like a 90-100hp gain so don't be worried. Bottom line, no more power than an EZ/TTPM makes in level 4.



XCX, bigger tires are heavier and usually taller. Taller = the weight of the tire tread is farther from the centerline, and therefore there is more inertia to it. Compound that with the fact that the larger tire also causes a reduction in overall mechanical advantage, and power starts dropping off.



Dan, at that HP level, it should have been dynoed in 6th as well.

 

[JaMan]

Which gear is better to dyno in on a 6spd in the 300hp range, just ran on a dyn ojet in 6th gear did we do it wrong numbers seemed low compaired to the time before on a mustang dyno, by 30 hp lower

 

[KLockliear]

If you just want a run, at 300hp use 5th. If you are going to do mods, do both. Usually 5th will show a better number under 400hp or so, but then 6th will show more above 400hp or so.



I don't believe you can compare the numbers from a Mustang and a Dynojet dyno. The Mustang has user adjustable loading, so it can be skewed. Not sure if their software is still open, but I was told by one Dynojet owner that a group came to his dyno with a car (Mustang GT). They made pulls to get a baseline. They needed the numbers so they could "calibrate" their new Mustang dyno.



Any dyno that gives the operator the ability to skew the numbers is bogus in my opinion. Just goes to show that they CAN be manipulated with a Mustang. Can't do that on a Dynojet. They are factory calibrated.

 

[Joseph Donnelly]

hp = torque x rpm /5252

Peak torque is usually around 1500-1800, but rpm helps give more hp at a higher rpm. Stock, your truck has peak hp around 2600. HP is what does the work for you--it is the rate of doing work. With more hp, you can pull the load faster/easier.

 

[Digger]

Keith,

I do have your version (TTPM) I just assumed that it was the exact same as edges version. I will have to go back and try again with the setting at zero, and sixth gear. Thanks



Joe,

Thanks for the help, if I read your last post enough I should be able to remember that.



Thanks again

Dan

 

[KLockliear]

Dan, when you do, try it with the first two pins on the left side set of pins jumpered. Like ---> II: