Mustang dyno vs. Dynojet

VEE EIGHT

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Apr 27, 2009

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Texas

Jul 7, 2009

#1

• Jul 7, 2009

• #1

I have a dyno day coming up at a local shop. They have a mustang dyno. Im not too familiar as to what the differences are between Mustang dyno's and Dynojets. I heard that output numbers are significantly lower on the Mustang dyno's?

 

stangnutlx

New Member

May 24, 2005

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Coventry, RI

Jul 7, 2009

#2

• Jul 7, 2009

• #2

VEE EIGHT said:

I have a dyno day coming up at a local shop. They have a mustang dyno. Im not too familiar as to what the differences are between Mustang dyno's and Dynojets. I heard that output numbers are significantly lower on the Mustang dyno's?

Click to expand...

Yes that is true. Mustang dyno's simulate real world conditions that your car actually see's driving on the road. Dynojets give off higher numbers, If you wanna see numbers for bragging rights then a mustang dyno isnt what your gonna wanna see on paper.

 

bhuff30

Founding Member

Dec 11, 2001

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Olathe KS

Jul 7, 2009

#3

• Jul 7, 2009

• #3

A mustang dyno supposably loads the car dynamically... as if you are really accelerating on the road. It gives a more realistic number as to the actual horsepower you are putting down to the ground. They do typically read lower than a dynojet, and I would argue dynojets are a bit inflated.

Having said that, I was very disappointed when I put my 88 on a mustang dyno. The opperator insisted on running it in 2nd gear (automatic 3 speed). When he punched the gas, the whole dyno run took about 6 seconds from tip in until he let off. Because there was soooo little load on the engine, the turbo lag was rediculous (4500 rpm full boost instead of 3000 I see on the street). I completely blame the opperator though. The runs were way to quick to get a reasonable torque curve. I ended up with 306rwhp (on a car the runs deep 12's? ) and a lot less torque. Though I am certain it makes buckets more torque than hp since it is pretty much done making power by 4500rpm.

So find a dyno with a good operator and always keep in mind, they are just numbers.

 

VEE EIGHT

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Apr 27, 2009

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Jul 7, 2009

#4

• Jul 7, 2009

• #4

Well this performance shop is offering a 3-pull deal for $40 on that day only (also having a BBQ and other activities) and no tuning will be offered. I suppose its a good idea to get a baseline figure?

 

02nightmaregt

To hell with your Mustang, I want to see your HOG!

Jul 1, 2007

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Southern Indiana

Jul 7, 2009

#5

• Jul 7, 2009

• #5

Yea dude for that price why not.

 

98GTfromGA

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Mar 17, 2002

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Memphis

Jul 7, 2009

#6

• Jul 7, 2009

• #6

yes, mustang dyno's read lower, they use an eddy current to put resistance against the car to simulate wind drag and stuff. they are better for tuning

 

VEE EIGHT

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Apr 27, 2009

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Jul 7, 2009

#7

• Jul 7, 2009

• #7

LOL Im just afraid of how low the numbers would be for my 02 auto GT

 

T

TGJ

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Mar 30, 2005

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#8

• Jul 7, 2009

• #8

A few points:

1) DynoJet's have the ability to do load bearing mode or Inertia mode for determing the RWHP of a vehicle. Load bearing mode is the same way that a Mustang Dyno determines RWHP. DynoJet's have had that ability for quite a few years and those that don't, it is an upgrade the operator/owner can purchase...

2) Mustang Dyno's when setup correctly will show a lower RWHP than a DynoJet in Inertia mode, they are generally the same when the DynoJet is in Load bearing mode. That said, it depends on the operator of the Mustang Dyno or Dynojet in Load bearing mode on where the RWHP is. It is very easy to show false RWHP numbers with a load bearing dyno such as a Mustang Dyno or DynoJet in Load Bearing mode. It is very easy for a Mustang Dyno to show higher RWHP than a DynoJet in Inertia mode. It is quite common for shops to show false gains...

3) To the OP, your dyno numbers will be meaningless if the shop does not lock the TC in 3rd gear, which means they will need to tune the EEC in your car. Since they are not doing any tuning, how do they plan to accomplish that?

 

VEE EIGHT

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Apr 27, 2009

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Texas

Jul 8, 2009

#9

• Jul 8, 2009

• #9

TGJ said:

3) To the OP, your dyno numbers will be meaningless if the shop does not lock the TC in 3rd gear, which means they will need to tune the EEC in your car. Since they are not doing any tuning, how do they plan to accomplish that?

Click to expand...

Im sure that that would be part of the deal seeing as I (and others) would essentially be throwing our money away. I dont know much about this shop (they mainly deal with imports), but I would imagine that they know what they're doing. We'll see.

 

Crzyhrse

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Dec 23, 2004

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Seattle, WA

Jul 8, 2009

#10

• Jul 8, 2009

• #10

An example of Mustang Dyno numbers would be mine put down 273RWHP/290RWTQ on a Mustang Dyno with CAI, Midpipe, Catback, and Dynotune. On a Dynojet I would be putting down in the area of 297/315.

 

98GTfromGA

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Memphis

Jul 8, 2009

#11

• Jul 8, 2009

• #11

yeah dynoject has an eddy current dyno now, i think the 248x or something like that, but not a lot of shops have them