Competition Scheid Diesel Extravaganza '03 results are posted

[atv98ah]

http://www.scheiddiesel.com/tdr/extravaganza03.html





Dyno results: http://www.scheiddiesel.com/tdr/de03dyno.htm

 

[therabbittree]

whats up with the dyno results? the top half to the list only says 500hp + 1000ftlbs+ ???? no exacts? their dyno doesn't read over 500hp or 1000ftlbs??

thats weird im sure some one knows the actual #'s

???

later

deo

\x/ hillfolk!

 

[jwilliams3]

Someone probably better qualified could answer.

But from what I could tell, the dyno is rated around 500hp and next year they will have a better one.

When the operator was starting to load it up either the truck would respond to the load by slowing down or either the truck could not be loaded by the dyno signaling an automatic 500+hp.



Also, the guys that did get the 500+ mark did have the required mods to get it.

For instance many twinned trucks in that list, also heavily fueled, large turboed, and many of the Fords running "drugs"



A thanks goes out to Scheids crew and John Porterfield for sweatin all weekend dynoing trucks!



--Justin

 

[R-N-R]

Pleased, but curious....

Although I was pleased with my results, I am also curious as to how this works.



The operator told me that he put on 100% load and my truck did not even feel it. The operator asked me if I had twins (I'm still stock turbo inhibited). They wrote a sticker for 500+, but the printed graph showed a bit above 450rwhp with 1050 ft lbs of torque.



I was third up Sat morning so I ran about 8:15am. I was expecting to score in the low to mid 400 range.



Not that I am complaining or anything.....



???

 

[Dsul]

I've been waiting to see the results, thanks for posting them. I have a question, I dynoed about 8:45 on Friday morning (Crawford, 99 Dodge), they were having trouble picking up readings. After my first run they said it didn't pick up a reading so they ran it immediately over. However, they set the max output to 80% rather than 100%. I ran 400 this time with a very hot engine (240 degrees when they backed it off the dyno). Dyno experts, does this mean my truck could have done more since max output was reduced? If you run the figures, dropping max output by 20% of a max 500hp equals 400hp. Any ideas? The driver stated they didn't run it very hard once he looked at my temp guage. Thanks in advance, andy

 

[R-N-R]

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[esommer2500]

This was my first dyno experience, and it wasn't the same as what I had witnessed the last couple of years at TIM. I ran about 11:30 on Saturday. Instead of spinning the wheels as fast as possible, like what seemed to be going on in Muncie, this dyno would 'load' the truck after it ran up to a certain RPM. I also notice the wheels weren't NEAR the size of the rig in Muncie, and there wasn't an RPM reading on the graph that I got back, just a time indication on the x-axis.



I guessed that I was running somewhere around 300 horse and maybe 700 lb-ft, but the numbers I recieved were 362/865, which I thought to be kind of high for my mods, but my plate is still kind of a mystery as to what it would compare to on the TST chart.



What kind of dyno were they running in Terra Haute, and what were they running in Muncie? Which is more 'accurate'?



Eric

 

[Steve St.Laurent]

Originally posted by esommer2500

What kind of dyno were they running in Terra Haute, and what were they running in Muncie? Which is more 'accurate'?



Eric

If it was the same dyno they've had in years past (which I believe it was) in Terre Haute they were running a Mustang 1000 and at TIM it was a Dyno Jet. The Mustang 1000 is a load type dyno whereas the DynoJet is an acceleration dyno. As to which is more accurate I would have to say IMO both and neither.



With any dyno there are many variables which will affect your #'s including weather (temperature, humidity, altitude), correction factors put into the dyno (which can be used to adjust the weather factors, but I've yet to see anyone at a dyno event measuring temperature and humidity to input them), how much boost your truck is making during the run (which can be affected by how the run is made and what type of dyno), and the dyno operator. You can't compare dyno numbers between different dynos on different days or even IMO the same dyno on different days.



I've run on 3 different Mustang 1000 dyno's and had wildly different numbers. I dyno'd on Scheid Mustang 1000 first and dyno'd at 309 hp/763 ft/lbs 3 or 4 years ago. At that time I was running 17. 3's in the 1/4. I then upgraded to a Powermax3 over a Powermax 1 and dyno'd on TST's Mustang 1000 and dyno'd at a peak of 303 hp (can't remember the torque #) but I was then running 15. 9's-16. 1's in the 1/4. So I lost 6 hp but gained over a second in the 1/4!? Then I dyno'd on a Mustang 1000 at the 1st TIM and dyno'd at 293 hp. As you can see all the exact same model dyno and vastly different #'s.



IMO the only practical use for a dyno is to make a run, then make changes to the truck, and make a run on the same day with the same operator. There will still be differences because the weather will change, fluids and hard parts in the truck will be different temperatures, etc. You can't really even practically compare 1 truck to another on that same day because one truck may spool their turbo faster and be making full boost on an acceleration run whereas another may spool slowly and be at half boost during an acceleration run. In this case a load dyno would be better used IMO because you can load the truck up and not start taking numbers until the boost is fully built.



I use the 1/4 mile for my dyno and calculate my hp numbers off of mph. I've found the mph in the 1/4 to be very consistent from day to day even when you have problems like hooking up, etc. This has been a far more accurate way to gauge how much power I'm making than the dyno has - for me.

 

[jwilliams3]

More accurate?

I don't know.



Consistent? Dynojet.



--Justin

 

[kaptn]

Steve are you using the device you plug in your truck? If so can you show me how it works and check my output the next time we hook up at the strip? Thanks Kirk

 

[esommer2500]

Thanks Steve. I was using this run as a baseline and just for general information, but found it interesting the way this dyno at Schied's worked compared to the one at TIM. I think if this load dyno would have had an RPM axis instead time, I would have found it to be even more beneficial.



Eric

 

[Sled Puller]

If it was a double roller Mustang, it is not for high horsepower/tq.



They are for emissions testing. Have no idea why they have it.



The big Mustangs set the standards in the dyno industry.

 

[KLockliear]

Originally posted by Steve St. Laurent

With any dyno there are many variables which will affect your #'s including weather (temperature, humidity, altitude), correction factors put into the dyno (which can be used to adjust the weather factors, but I've yet to see anyone at a dyno event measuring temperature and humidity to input them

All of the current Dynojet hardware/software (since DynoWare EX+ was released in 1998 with Winpep 6. 0) has had automatic and internal temp/humidity sensing. One of the boxes in the stack is called the atmospheric sensing unit. This is its function.

 

[KLockliear]

Originally posted by Sled Puller

The big Mustangs set the standards in the dyno industry.

I believe this is kinda hard to say or prove. Dynojet has always said the same. As a point of reference, there are more Dynojet dynos out there being used for performance work than any of the other types, and they are the "Official Dyno of NASCAR", but saying any one brand is the industry stardard is a bold statement to make.



We have and use a Dynojet, and for the R&D we do, it's the most repeatable unit we have seen. Consistency is the name of the game for us.



I won't claim its the best, because some dynos do certain things better (loading, steady state stuff), but for performance, I believe it can't be beat. Just my $. 01.

 

[R-N-R]

"Fine Dyno'ing" All chassis dynos are not created equal.

From the MD web site.....



"Fine Dyno'ing" All chassis dynos are not created equal.

 

[kaptn]

Thanks for your quick reply Steve. I found a way to calculate HP by elapsed times in MPH 1/4 mile and 1/8 milehttp://www.virtualengine2000.com/Google.htm

This is a free download.

You also have to know the weight of your truck.

 

[Steve St.Laurent]

I hadn't seen this post in a couple of days because I've been working on site upgrades. I have used the g-tech (the GLTDR owns one for members use - I believe Eric Pitts has it) and found it to be pretty accurate. I'll have to dig around to find the formula that I've used in the past and yes you do have to know your race weight.



-Steve

 

[kaptn]

Steve! all work and no play make Steve a dull boy! lol Kirk

 

[fbaurley]

There are several different types of dynos. the first type, likethe the mustang_uses a drum of a know mass, the dyno run measures the time it takes to accelerate the drum to a certain speed (rpm). Then through some fancy physics equation you can calculate horsepower. then torque can be baqck calculated. The other type such as scheids, appliy a load( like brake) there is a load cell which measures the force acting on the brake, then wth some more fancy physics they can calculate the torque. with the torque, and the known speed the rolls are are opertating,they can calculate horsepower. This is the most accurate. Any engine dyno will operate with the latter technique. The same technique of applying a load is used on a water brake dyno the is used to dyno tractors from the power take off. A different operator on a mustang dyno can get different results. the load types are pretty reliable. As far as im concerned from working in engine test development the mustang acceleration dyno is a joke especially with high torque diesels.

 

[Sled Puller]

Originally posted by fbaurley

There are several different types of dynos. the first type, like the the mustang_.

Which Mustang? They have several.