shivers

Some friends set up a dyno day over the weekend. I decided to jump on the rollers to get a baseline. 1450 miles on the clock, so it should continue to pick up a bit as things loosen up over time. Three runs were done back to back with coolant and air temps stablized. The dyno used is a Dynodynamics (load bearing), so the numbers will probably look different to you if you're not familiar with this type of dyno. In Dynojet numbers, the car puts down about 215-218 at the wheels. Enjoy.

PilotKD

Wow, nice!

papa5murf

and you are stock?

mad-dog-one

I'm not as dyno-savvy as some reading this thread and can bairly read the numbers on the report. Can someone help me with the interpretation of these readings.

Thank you

papa5murf

^ numbers on the bottom horrizontally are the rpms.... numbers on the side... virtically are the hp and torque numbers ( 0- whatever it may be)

the line that goes all the way up to 185 or so is the HP line... and the line that is relatively straight across the graph with a couple of jumps here and there is the torque line...

mad-dog-one

Thank you. I don't see a scale for torque ... The Y-axis looks like HP on both sides of the report. Is there an way to know the torque values at various RPM using the graph or is it sufficient for most folks to simply interpret the relative torque? Why is the HP at the wheels 186 in this dyno when other methods have produced 218 HP? Thank you again, I really don't know much about this stuff and appreciate the opportunity to learn a little from the experts.

papa5murf

^ hp and torque uses the same numbers on the y axis.. (0-whatever number)

different dynos pull out different numbers..... i'm not sure about dynodynamics tho... i'm only acustomed to mustang dynos and dynojets...... mustangs gives very low number i believe it's 15% lower then dynojet numbers.... not sure what the difference with the dynodynamics is.....


however.. this 216-218rwhp on an ap2 (stock) is a little hard to believe..... (must have a factory freak on his hands) ... i've only seen numbers of 200-210rwhp on an stock ap2....

papa5murf

ohhh.. dynojet is done on rollers... and mustang dyno is done at the axels i believe?? the rear wheels are taken off on a mustang dyno to my knowledge..

shivers

Dyno Dynamics dynos are load bearing dynos and very similar to Mustang dynos in their operation and number output. By adding on 15% (like with a Mustang), you can get a very good estimate of the Dynojet numbers. It's not exact, but you'll be within 1 or 2 hp as a maximum variance.

shivers

Dynojets use a huge drum that measures inertia and calculates the hp/tq. These are typically the most common dynos.

Mustangs and Dyno Dynamics have two small rollers that create a channel that the wheels sit in. Electric current is used to produce a load to recreate what a vehicle sees while in motion on the road. The load placed on the car makes tuning very easy and accurate. The number output from these dynos is lower than a Dynojet.

Dynapak dynos require that the wheels be removed so the hubs can be attached directly to the dyno. There are no rollers. Water can be run through the dyno to increase the load if needed. Since the wheels are taken out of the equation, Dynapaks typically read higher than Dynojets.