chemicool

iTrader: (1)

Hi,

DOes anyone know any other dynapack tuners for rx7 other than Defined Autoworks? Preferrably close to or in Texas? I would go to them but kinda far away. My understanding is that a tune on such a dyno offers a more complete tune than road tuning or tuning on a roller dyno and is also safer.

thewird

iTrader: (8)

What does the dyno have to do with the tune lol? Safer yes, tune no.

thewird

chemicool

iTrader: (1)

The following is from Defined Autoworks tuning thread.

Safety-

Your vehicle is not strapped to our dyno's, it is BOLTED to our dyno's. The wheels are removed, and hubs are bolted in place of them. Then these hubs spline into the dyna-pack pods directly, meaning no tire slip! No straps to damage body panels, or bend brake lines, or melt on your exhaust system.

Load-

Our dyna-packs can place a constant load at ANY rpm point. When we tune, it takes a little longer than most, because we tune EVERY 500rpms at ALL loads. For example, if we punch in the dyno to hold the car at 2000rpms, we can accelerate slowly to 2k, and the dyno will then place a light resistance on the car, preventing it from going past 2k. Then push the throttle down slowly, the load increases perfectly keeping the car still at 2k, until full throttle is achieved. This means that no points on the fuel map are left untouched. And you get a FULL tune. Inertia (most roller) style dyno's cannot do this, so when your car is "tuned" on one, in reality it is only part tuned at Wide open throttle and cruise. Hardly the only places you drive in. Then the largest benefit, is that any problems with a boost controller, excessive lean spots, or boost spikes can be easily detected before any damage occurs. The inertia dynos are not able to do that so well.

Accuracy-

Companies like- HKS, Apexi, TRD, Toyota, Honda, Dc sports and more all use dyna-pack. They use it for the same reason we do, dyna pack it the most accurate, and repeatable dyno out on the market today!



Chuck also mentions this type of dyno in his Power FC notes. Makes sense to me

thewird

iTrader: (8)

Marketing owns you. A lot of dyno's provide load now but that still doesn't help you tune. Dyno's are for safety.

thewird

bzwigart

iTrader: (9)

So a dyna-pack is not a better method of tuning?

thewird

iTrader: (8)

Not any better then any other dyno, or the street for that matter. Dynos give you numbers and a safer method of doing power pulls. That is it.

thewird

Miata_mx5

A dyno number is a dyno number. Dynojets read 1 number, Mustang dynos read another, and Dynapacks too. In the end it's a horsepower number.

I do myself prefer to be tuned on a dynapack for better partial throttle/full throttle tuning and greater accuracy under load.

So yes, i do think a dynapack is a better overall system, and I do want my settings done on a dynapack.

But in the end, Hp number is a Hp number.

chemicool

iTrader: (1)

Everyone has their beliefs. I simply asked if there were any close to texas

thewird

iTrader: (8)

Partial throttle tuning should be done on the street because thats the only place its actually going to be accurate. No dyno can provide the correct loads placed on the car. Every single car is different and even between same models, there are big differences between the way each car is setup. The only thing load on a dyno is doing is trying to replicate real world conditions on the road.

Dynos are useful tuning tools yes, but going to a particular dyno isn't going make your car better tuned then another dyno was the point I was trying to make.

Maybe you should post in the regional section.

thewird

Miata_mx5

Original Poster: What kind of engine management?

Do you want the shop to do the tuning? Or, will you provide your own tuner, and just want to rent the dypapacks??

Jason

iTrader: (5)

Dynapack, Mustang and some Dynojets all have the ability to place a load on the car which simulates driving on the street. I would be more worried about who is tuning the car rather than what type of dyno it is. Steve K. is in Fort Worth area and has a Mustang Dyno. Call him.

thewird

iTrader: (8)

Bingo, tuner is everything.

thewird

fendamonky

iTrader: (6)

I can't agree more! At the end of the day a Dyno (any type of dyno) is just a tool used for tuning your car in a safe, controlled environment. Do you consider what brand wrench you use (over oil/filter type) when you're doing an oil change??

The largest difference you're going to notice from one brand dyno to another is the number it returns for horsepower... (hence the reason I'm not bothered by my "low" power numbers at 17.5psi)