I have been looking at everyones dynoed #'s and than theres debate about what gear did they pull in and what dyno they used. What are the differences between dynos?

 

Dynojet Usually are higher then Mustangs...

Then theres a debate about the gear... they say 3rd has higher numbers then 4th... but i dunno...

Numbers in sig are 3rd gear on a dynojet.

-Rich

 

Are there just the mustang and dynojet dynos or more types?

 

yeah what he said^^^

 

Stock - 202.9hp @6300 and 191.9tq @3800 11/19/05 Eddie current Mustang Dyno

Supposedly even the same kind of dyno can yeild way different numbers. I was told that Inertia Dyno will result in higher but not as accurate numbers. And Mustang Dyno's website says that the Eddie current was the most accurate type.

I am not sure what the difference is though. can anyone else elaborate on this for us?

 

their are tons of different types. not sure how many.

 

mustang dyno's are **** if you ask me...

 

The only types of Automobile dynos that I know of are Mustand and Dynojet.

A mustang dyno simulates driving on the road by providing resistance on the heavy weighted drum. The numbers are more accurate as to what you'll see on the road. But its usually lower than Dynojet numbers.

So most newbs won't like Mustang dynos because the numbers arn't good for bragging. But they are more accurate and more useful. You really want to tune on a Mustang dyno because it does simulate better road conditions.

Dynojet dynos don't put the same stress on the motor, so they give higher numbers, but arn't as realistic.

 

Thanx guys

 

yup,

 

There are two types of dynoe I know of: Mustang and Dynojet

Dynojet sets the standards for dynos.

Mustang dyno's are less accurate.

SHould do a pull n 4th casue its the closest 1:1, if not your just fluffing your Hp with a 3rd gear pull.

 

WRONG

 

Yes - Dynojet is the idustry standard

N O - mustang dyno's are not less accurate. In Fact Dynojet numbers are. Mustang dyno's are more accurate to actual on road performance.

Yes - 4th casue its the closest 1:1, if not your just fluffing your Hp

 

here's a website you can read up on dyno's. do some searching, might help you understand better.

http://www.dynoperformance.com/

 

??? actually there are only 3. a mustang dyno is on rollers on a platform. a dynopack which is atatched to the hubs (wheels off). and a dyno jet, which is like a mustang but built into the ground.

a dynojet is as close as possible to realistic road power (as long as its properly calibrated of course). then a mustang dyno is about 10% lower than a jet (or real). and a pack is about 10% higher than the jet.

you can also tell just by the print outs. a mustang sheet has very smooth lines and usually no a/f reading. a jet is very rough has an a/f. and a pack has a black background with tq and hp seperate.

 

forgot about a Dyno Dynamics Dyno

 

oh yeah i forgot. gear depends on each car ratios. like my 6 speed, 3rd gear is the most acurate. in a 5 speed than u should use 4th, but 3rd is still ok.

just because u use a lower gear doesnt matter. if i have 230whp in 3rd and 215 in 4th, than that is what i have.

if someone is like "i got 260whp!" and thats all they tell u than u dont have a base to go off of. that could be in 2nd gear and by crappy or in 5th and be very good. when u report numbers look at
1)what type of dyno, from there u can determine where they really are. (remember if they use a mustang add 10%ish, and subtract that for a pack)
2)what gear it was in, from there u can further tell where they really stand.
3)where they are located, up north or at high altitude will drop numbers.

so if i said i dynoed on a mustang at 210whp in 4th gear (and 3rd or 4th is really standard) in florida, than u no that i am about at 230ish IN 4th gear b/c fl is at sea level and the dyno is 10% low. but always keep in mind the gear. 230 in 4th is different than 230 in 3rd although both are REAL numbers.

(the reason for the difference in dyno numbers is the way the load is calculated on the mustang b/c it is designed for 4 wheel or rear wheel drive cars, some are up to 16% low. and with no wheels on a pack, there is no weight calculated in for them, also on a pack u can tell the computer not to take drivetrain loss. so if it looks really high, look at the tps box, if it says 1.0 than it is flywheel hp not wheel hp)

 

Not all DynoJets are built into the ground. They can be, but many aren't. I'm sure Mustang Dyno's can be in ground as well.


Usually, the "smoothness" of the lines is just a setting on the readout. Turn up the smoothness and the computer adds damping to the results, and vice-versa. Also, A/F ratio is an available add-on on DynoJets, not standard, and I imagine it's an option on the others as well.


Anyway, like most have said, Mustang and DynoJet are the most common types... and Mustang Dyno's USUALLY read ~10-15% lower. Because of the necessary calibration of the "loaded" dyno, however, dyno results can vary widely. BTW, having a "loaded" roller is an option on DynoJets as well, but few have it.

 

huh? a dynofet built on the ground. whats that mean. the only dynojet i ever saw was one you had to drive up on.

 

Some Dyno's are built INTO the ground. Like all there is is a roller sticking a few inches above ground level.

Ahh, found a pic.

 

im going to be using a mustang dyno next month, ill let you now what the numbers are

 

bump for some very useful info. Anyone else have anything to add? I'm going in a week or two and am still deciding between two places. one has a dynojet at $75 plus $35 for an air fuel, and the other place is a mustang dyno at $100 for a baseline. I'm not sure if that includes an air fuel readout or not.

 

I love threads like these. So much fact, fiction, and plain ol bullshit get all mixed up together and fed to the lemmings who would believe the world was ending tomm if you told them, via a car forum. God bless the Internet. My advice is go ask or search that question on another forum, not one where Its only been around for a year and 70% of the members are noobs and might be spreading misinformation.

 

it's great huh. I wam going to dyno on a Dynostang. it has the best of both worlds.....

 

I used a chasiss dyno, which increases the resistance as the car speeds up. These are very accurate, because they provide a constant load. Look them up. Alot of hot rodders use these types. When I went there there was nothing but old muscle cars hanging around. It was pretty sweet.