i am lookin to dyno the unichip when it gets it, have any of you ever dyno'ed on a chassis dyno, theres one around here but i heard that they read like 10-15 % less than a dyno jet..

anyone have any input?

 

Try to find a Dynojet.

 

Most people like Dynojets because they are the 'staple' dyno system out there. However the error between dyno's (usually) is just as much as dyno'ing on the same dyno on two separate days under varying conditions.
Dyno's are used to give 'rough' or ballpark power figures.

 

i see there is some dyno jets close to me...

 

Darrin -- you're blowing this way out of proportion, my friend.

I said there would be a 20 horsepower difference on Andrew's 240SX. He dynoed 350 at the wheels on Godspeed's chassis dyno, and he would most likely dyno 370 at the wheels on a dynojet. That equates to about 5% difference, which could easily occur on the same dyno on two different days, like allmotor said.

Godspeed is great to work with, and VT is good. But they always get swamped with race engine jobs during this time of the year and it would be hard to get an appointment for a dyno. That's why Andrew went to Godspeed instead of VT. Nick used to do the dyno pulls, but he got fired or something a few weeks back, and now there is only one guy who can do the dyno shit. That's why it's gonna be hard to get an appointment, because he also works on engines.

 

Advanced Chassis Dyno in Sterling Heights has a DynoJet and it has been very consistent and in-line with what the power numbers should be all 3 times I have been there. Its $75 for 3 runs w/o AF, and an extra $20 for AF. Its on 16 mile between Van Dyke & Mound.

 

BTW, a Dynojet dyno is a chassis dyno.

 

That's what I thought. They are the same thing. Dynojet is just a brand.

 

Doesn't the dynojet use a drum-like structure built into the ground?

The dyno at Godspeed is these stations that you hook up directly to the hub after taking off the wheels.

 

i just talked to dan, he said that there isnt much of a difference....

 

If you need to dyno-tune, find a Mustang dyno. If you don't need to tune, the Dynojet will "usually" show numbers that are a little higher. The type of dyno (not sure of the name) that is bolted to the wheel studs, after removing the tires/wheels are used on AWD vehicles.

 

You can just use two, as well. That's what they did for my friend's 240SX.

 

I think they are also good for tuning, as they are able to apply resistance like the Mustang dynos.

 

Was this done at Payn Tech? I think they're the first in the area to have this type.

 

godspeed