ill have to see what i can do with a trailer and come down. im afraid of blowing up on it and being stuck out there.
this is so awesome!
i know someone with a trailer cough cough
btw congrats em on the purchase :tup:
Having a Dyno to tune on really gives you an edge over those who street tune, when you are tuning different scenarios all the time, you get hp/tq data, not just fuel and timing maps logged to where your experience tells you they need to be. When you have a tool like a dyno in your shop, it will make you a better tuner than those that do not have a dyno because of the results you see in the graphs, and you can fine tune a car to make the most power everywhere in the rpm range testing different theories instead of just doing what you think needs to be there or what you read online that it should be. Nice purchase Em, it is ballsy with the economic status right now, but I have faith you can make it work as long as you work hard which I am sure you will. I still do some stret tune verifying on some of the high hp cars I do here, now I have someplace to go to do this instead of doing it on the street, and it is right down the street!
emery, would there be an option to rent out the dyno if possible?
street tuning my car got very scary at some points, i dont feel very safe doing that again lol
:word: I would like to know as well. I’m going to be doing a lot of datalogging for my tuner and I’m sure I could work something out with him to do it all in one session if I had access to a dyno to make pulls.
Would this be an option that you would consider or will it be just used for you to do your tuning?
While we are doing pulls with you cars you are more then welcome to datalog and make changes…
-Em
You’re assuming someone is street tuning without the proper equipment to accurately determine whether a change gains or loses power and pinpoint the RPM range where gains/losses occured.
All the dyno reads is RPM and acceleration rate of the rollers to make those graphs. The dyno software gives you a torque graph based on how fast it accelerates the rollers using it’s calibration data for the weight of the roller (or weight plus resistance on a load bearing dyno). Then the dyno software calculates the HP graph based on the simple formula HP = (TQ X RPM)/5252
So the horsepower graph is generated from the torque graph, and the torque graph is generated from the acceleration rate data recorded during the pull by the dyno.
Anyone that can gather accurate and repeatable acceleration data can generate torque and horsepower graphs. I like doing it on the street as long as a car is safe to drive, so that the acceleration rate is exactly the same as in real world conditions…because you’re driving in real world conditions…you’re on the street. 
The load isn’t an approximation of what load is really like on the street or at the track…it IS the street or track. The graphs will be high or low depending on the calibration numbers they use, just like some dynos read higher or lower than others, and most dynos can be made to read higher or lower by changing their calibration # or multiplier, but the shape of the curves will be correct and it will be easy to see gains and losses. That’s what makes a dyno a tool that helps you tune…seeing those gains and losses. If you make a change and torque goes up, great. If you make a change and torque goes down, it didn’t work. The tuning adjustments you choose to make are up to you.
When street tuning if you want to know if a change helped or hurt torque output as you can on a dyno, you do a single gear pull in a gear you choose, just like on a dyno. You log your acceleration either by logging time and vehicle speed to have Excel calculate it or by logging longitudinal G’s directly as I do to save time and avoid inaccuracies from wheelspin if a car spins a tire or few. The graph is generated for me without me having to copy/paste into Excel so that’s a time saver. I can do a pull and view the acceleration graph in seconds.
Those that can’t accurately log longitudinal Gs should log vehicle speed, RPM, and time during a pull, along with their other tuning related parameters. Then just stick the values in excel and have it set up to automatically graph acceleration with vehicle speed as the x axis using the formula you may have forgotten from middle school:
change in speed / change in time = acceleration rate
Here’s how I do it:
I do some baseline pulls just like on a dyno. Then lets say I add 2 degrees of ignition timing advance from 5000-7000 RPM. I do another pull to see how the car reacted. I lay the acceleration graphs over each other and see at what speeds I gained/lost acceleration rate. Lets say from 65-70 mph I increased acceleration rate (torque was higher) on the post adjustment run, but from 55-65 torque was the same. I look in my datalog to see what RPM I was at when I was going 55-65 MPH. I’d remove that extra timing advance in that there because it didn’t help.
Here’s an example from when I was tuning the continuously variable exhaust cam on a new 08 STI for someone. Some say a dyno is the only tool that can show if you gain or lose power from cam timing adjustments, but I guess they haven’t seen what I have access to. These runs are very similar until you reach the area where I made a cam timing change in the high RPMs (in the last 3rd of the pull). In this case using less exhaust cam retard in that range made more power. I had retarded the cam past where it was helping for test run pull2b, so I used less retard on pull3b and made more power on the top end where the change was made. Here’s the graph…it mirrors the torque graph the car would generate on a dyno. I cropped the low RPMs off for this one so I could focus on the area I wanted. You can also see a little hiccup in the middle of the graph that was resolved by a different cam timing adjustment on the next pull.
And here’s an example of a slightly modded Cobb Stage 1 map logged by my software vs. a dyno graph of a Stage 1 car. Both are mechanically stock 08 STIs. Notice how my graph just about mirrors the torque curve for the blue dyno run before the intake was installed. Sure they’re not EXACTLY the same but the tunes aren’t quite the same and it’s two different people’s 08 STIs. My graph also illustrates a turbo wastegate duty error I’ve helped Cobb resolve right as the car comes on boost and hits peak torque (at 2.7 seconds).
Graphs can be smoothed if I want, just like on a dyno, but I prefer to see any little hiccup if one is present so I can fix it.
wow, thats quite the essay…lol
This thread is not here to see who has the biggest tuning dick. Its here to let my customers know that we added yet another BIG tool to our inventory, which is the responsible thing to do. Again we are not here to talk about what can be done, Just to show what we do.
Thanks
-Em
well said Em!
I didn’t post something to argue about who can do what, just simply stated some facts on tuning and that a dyno is an important tuning tool, not to mention being able to show the customer what you did is worth something to them.
I completely agree with you.
besides being able to show what you did I will not have to make 35 trips back to the shop to make changes that a laptop simply cant do…
you ever been laid???
didnt thing so.
buy a dyno and shut up!
he has a kid and a wife so im gunna assume he has.
Two kids I believe! And he already had a dyno.
Can someone please remove that useless post so my thread doesn’t get all boogered up with nonsense?
-EM
“didnt thing so”
:picard:
:tup: on the dyno should net you a lot of business and save people a trip to Canada
key word is had. if he is worried about loosing customers and business then he should upgrade his tools. its like hes crashing in on someone elses thread to justify his business but he doesnt have the tools that someone else is willing to buy for the longevity of there own business.
I don’t see it that way. Mike has put some very good information into this thread. I don’t see him crashing it.
There’s no need to take a personal shot at the guy’s sexual experience’s. Where the frig did that come from??
But we are straying from the point of the thread you are correct, so with that said, I’ll be in Rochester to do some pulls when Em gets everything up and running.
Once again, congratulations Em and Shawna!
im just a smart ass. anyway i just see it as if there are 2 shops on 1 block that do all the same service and 1 buys an alignment machine then the other has to upgrade as well.