DynoJet vs DynaPack (Realistic Readings and Cost)

[Scotty001]

OK, maybe a mod, but as most know here, not a gearhead.
Have seen a lot of information on DynoJet vs DynaPack since the "Church" thread.

Seems to be a good discussion topic..

Basic argument seems to be the DynoJet with the rubber on the floor may represent what your car is putting down with the DynoPack representing what the car is capable of.
The DynoPack is better for tuning seems to be a popular opinion. Searching the net/forums... numbers seem to be all over the place.

First, how much should one (have you) pay'd for a Dyno/Dyna test?

Second, which one is best for a tune and which one is best for providing your rubber meets the road HP?

Third, how much does the DynoJet/DynaPack Operator expertise play into your final outcome?

Note: Actual posting of charts should go here: OFFICIAL Dyno Charts Thread

[northbridge]

All dyno's are probably equally good for tuning if you use them the right way: to compare a baseline to a tuned chart. Tuners use different dynos with no ill effects. Dyno operators / tuners make huge differences in what happens to your car which is why its usually better to go to an established tuner to get your car done. Church is about as legit as they come

A shop local (to me) charges 70 for 3 pulls on a dyno dynamics dyno

I think for rubber to the road the best dyno would be a Mustang due to simulated load.

Heres a thread i found after a quick search w/ more info: Mustang VS. Dynojet (GOOD READ!) - G35Driver

[Scotty001]

^ aye. Thanks North.. Points well taken.

On the price, my local Speed Shop wants 150.. Going to hafta go shopping..

[gsilvers]

For one pull, thats far too much. For a few pulls if you were installing parts though it would be legit. Figure a dyno run as roughly 30 minutes of labor in terms of what you would expect to pay.

[Scotty001]

^ More good info.. Thanks..

[MachVEvan]

Does the $150 include A/F?

The dyno jet is going to be your most consistent from baseline till your car is finished since it is based of the mass of the rollers and not creating artificial load. Mustang synod are great, as long as they are calibrated. Never used dynapack though.

As stated above, when properly utilized each dyno type should provide an adequate test environment for tuning. Dynojet is what I use, and for my money, I will go with consistency and reliability over mustang dyno's and their wavering numbers any day.

[gsilvers]

Yea I should specify if they are going to wideband your tube expect to pay more.

Some of us have an AEM from their last car waiting for the motivation to install it.

[Varmint]

The skeptic in me will add this one bit of advice. Don't dyno at the same shop where you tune.

I have a friend with a Cobra SVT Mustang. While waiting for work to be finished on his car, he overheard a conversation between a customer and a dyno operator.

Operator: That's what I expected... about XXX hp at the wheels.

Customer: That seems low.

Operator: OEMs always rate their stuff high. You need an intake, exhaust, blah, blah, blah

Customer: But I just had that done.

<<Boss runs over>>

Boss: Let me do that!!! Okay, on this run we see XXX +15.

Any shop that installs your intake, exhaust, headers, or whatever is going to want to see a difference after the mods are added. They want you to see evidence that you got something for your money. Otherwise, you'd never come back. In that particular shop, it was (apparently) standard practice to rate the car low for the baseline run, then higher when they tested it after the install. The operator screwed up and thought he was running a baseline.

[MachVEvan]

^^^

That's messed up.

[Evans Tuning]

We use a Dynapack in our shop. It's great for tuning and the engineering of the system is superior (makes no noise, uses hydraulics to control loading, cooled with a garden hose, requires zero maintenance).

In terms of costs we charge $75 for 3 2WD pulls and $125 for 3 AWD pulls (there is more setup time involved).

As far as numbers, our Dynapack has made similar numbers within 1-2% as some Dyno Jet's in our area. The claim about Dynapacks reading higher has in our minds been debunked.