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Old 08-02-2009, 02:25 PM   #41
Chillerman
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Originally Posted by Linn@AmazonTuning View Post
the rollar has a brake to put resistence against it to simulate weight and the wind resistence is calculated into the computer program..

you can pick this apart if it entertains you to do so.. we use it to get a close idea of what the vehicle will do at the track in real time..if it does it on the dyno you SHOULD be able to get to that on the track too..unfortunately the dyno can not calculate for driver ability.. not that it is all that hard to take a Lightning down the track.. you pretty much do a burn out and point and shoot..if I can do it.. you all should look like pros
Linn,

Not trying to start an argument here. I would like to know how you know how much brake pressure to put on the dyno to simulate the weight of the vehicle being tested? Also is the wind resistance calculation a fixed number or is it a variable in the program? Can the dyno discern between slicks, drag radials, or street tires? I do realize that you have an eddy-current dyno which is state of the art equipment. I know what eddy-current equipment is since I'm exposed to it every winter in my line of HVAC work so we can test the integrity of the copper tubes in water cooled industrial centrifugal chillers.

If there are variables in your computer models, then I would think you could make whatever predictions you want about track performance. I'm a firm believer in test&tune at the track, but also a believer in tuning your vehicle for the mods it has. But track testing is the only way to know what the vehicle is capable of.
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Old 08-03-2009, 01:58 PM   #42
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Linn,Not trying to start an argument here. I would like to know how you know how much brake pressure to put on the dyno to simulate the weight of the vehicle being tested? Also is the wind resistance calculation a fixed number or is it a variable in the program? Can the dyno discern between slicks, drag radials, or street tires? I do realize that you have an eddy-current dyno which is state of the art equipment. I know what eddy-current equipment is since I'm exposed to it every winter in my line of HVAC work so we can test the integrity of the copper tubes in water cooled industrial centrifugal chillers.

If there are variables in your computer models, then I would think you could make whatever predictions you want about track performance. I'm a firm believer in test&tune at the track, but also a believer in tuning your vehicle for the mods it has. But track testing is the only way to know what the vehicle is capable of.

the weight is entered into the computer before the dyno tuning session starts..the drag coefficient is generated by the computer for the weight of the vehicle..whatever is on the vehicle will either spin the rollar or not spin it.. so whether it has slicks,radials or street tires if it spins the rollar will not turn and this will effect the results..

Mustang Dyno makes the computer progams by the model.. if the model changes then they have to update for the shape of the body.. so there are different drag coeffients for different body models

if you have any more questions about how this works you can contact MD and get more detailed info from them..

we bought a new dyno about a year ago.. it has a single rollar with a built in weather station..it also has a tie down under the vehicle in the middle of the axle to help eliminate wheel spin on high hp vehicles... it is very stingy on the results and more consistant than our old dyno that had 2 rollars and no built in weather station..

according to MD any dyno result can be manipulated.. even from an inertia dyno

I agree that track results are generally thought of as a better way to test results but there are also variables involved at the track that can effect the outcome.. and many people will never take their vehicle down a track so they need a way to measure results other than a track run..
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Old 08-03-2009, 02:29 PM   #43
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those people that never take their vehicle down the track and boasts what "it s 1/4 mile times are" are complete tools who dyno race and get their ass cut by way underpowered vehicle and come up with bs excuses. which usually nets them in going back for more tuning because "its off". blah
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Old 08-03-2009, 02:44 PM   #44
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Most Mustang guys are dyno racers anyway, if what I heard about Drag Night at Mustang Week is true. Guys running 1-2 seconds off of normal times? Please. Sometimes I think guys go out and get a tune so they can add another sticker to their car. LOL

I may be slow, but at least I know that the biggest problem with my car is sitting in the driver's seat.
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Old 08-03-2009, 02:51 PM   #45
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I hear ya.. and thats true enough but it is different strokes for different folks...eventually they will understand or they wont..and some will never care what you are trying to tell them about track results.. they think they know better .. and they will think what they want to..
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Old 08-03-2009, 09:02 PM   #46
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Linn,

Thanks for your response. You've answered my questions. Yes there is different strokes for different folks. I for one don't dyno race my cars, I do it on the track. My car runs what it runs, and my times and mph differ from previous visits as track conditions & driver ability all effect the outcome at the big end of the track. I had my blue car tuned by Chris Tuten, only did HCI, fuel injectors and MAF conversion. Motor only makes about 310-315 RWHP and a flat A/F all the way up to 6K. We made a couple of fuel pressure adjustments and dialed it right in. Car has been trouble free for 2 years, runs great, and has had the shit run out of it.

Sean,

Drag night at Darlington for Mustang week was a joke. We went with the white car, registered for T&T and class. First time to a 1/4 mile track since the C4 and loose converter went in. It was so dis-organized, tech took about 2 hrs., plus they waited until around 6 pm to open tech. I was lucky as I was pitted close and only about the 10th car back. I made a whopping 2 passes before the rain came and shut down the track. We loaded up and left. Car ran ok but not great as we blew the tires off when I hit it with 125 of love juice.

Lastly Linn,

I do believe in tuning your engine period. It's the only way I know of getting peak efficiency out your combination. I won't comment on your services as I'm not a customer, if I were and had any issues, it would be kept between us on the phone and not on the forums.
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Old 08-04-2009, 04:23 PM   #47
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the inherent fault with dyno result racing is that no two dyno's results can be compared to each other..even the results from the same type of dynos can not be compared to each other.. they are all set up and calibrated differently..the true test is at the track but you are only as good as the day you play .. there are so many varibles involved.. it is like golf.. one day you are really good at it just enough to keeping you coming back even when you really suck the next time you go out..

a dyno is a tuning tool..plain and simply but others dont look at it that way and when they are paying.. they can look at it any way they want to..


Drag night at MW had alot of complaints.. it is really a shame.. you would think it would have been a really fun time..

...airing problems in public seems to be the norm these days..it is used to put pressure on a party to comply ..I appreciate your attitude..it shows intergity and character and Im glad there are still guys like you around..
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Old 08-04-2009, 07:45 PM   #48
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Linn,

I couldn't agree with you more. Thank you for the compliment as well. It was a shame that drag night turned out the way it did. You certainly can't control the weather which is what shut it down. I don't think the track was prepared for the turn-out they had (just my opinion). The people representing Mustang Week were trying their best to get all the class cars through since we paid for it. They seemed a little frustrated with all the confusion going on.

Thanks for all the dyno info. Our cars make what they make at the wheels, and they run what they run at the track. You just need to be at your best behind the wheel and hope you brought enough power to beat your opponent.
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Old 08-13-2009, 07:16 PM   #49
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I won't comment on your services as I'm not a customer, if I were and had any issues, it would be kept between us on the phone and not on the forums.
This is where you and I dissagree and mostly because 99.9% of their customers have probably tried that route including myself. I'm lucky I got my money back as others that you can see posting in this thread, and others that read and don't post and are previous pissed off customers didn't.

People that roll over and take beatings are why vendors like Amazon exist, because basicly what they are saying is "well there's alwayse another dumbass out there we can screw out of their money" and they are right, people will continue to pay for their garbage tunes, garbage work as long as people continue to roll over and take it in the rear.

As for me, I hate it ,I see it all the time, one after another, after another, after another. And they roll over.................

If people didn't roll over, everyone would be getting their moneys worth out of everything they buy........ And there would be no such things as scams or con artists.

Yes I know.... Thats what makes the world go round, and its been like that since the dawn of time bla bla bla, whats one person gonna do about it........

The answer, one person can do alot. If I can shed light on 10 rip off's in my entire lifetime, thats 10 less rip off's that my kids or my kids kids will have to deal with..... Shure it may not be Amazon but they are one that fits the bill with the rest of the scum out there.

Quote:
Originally Posted by Linn@AmazonTuning View Post
...airing problems in public seems to be the norm these days..it is used to put pressure on a party to comply ..I appreciate your attitude..it shows intergity and character and Im glad there are still guys like you around..
Let me tell you something rite now, you can whine, you can try and buy your way out, you can make up stories, you can kiss ass, you can make phone calls and you can make threats.
But there's nothing you can do outside of prying my cold dead fingers off this keyboard or any other comunication device (and even then your gonna have a fight) thats gonna stop me from telling others about how you've screwed people. I don't roll over,I don't stand by and watch others get screwed, and most of all I don't forget.

The worst part is, I want nothing from you, and theres nothing you can do to stop me.

So pay your supporting vendor fee's and plead for the oppression of free speach, you do nothing more than feed and fuel me more.
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