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Why Dyno?

Engine dyno testing is generally viewed as a luxury, only required by professional race teams and engine builders.  Even the most basic engine builds can benefit from being run and tuned on an engine dyno.  Dyno testing is the only true way to accurately measure power output, and how tuning adjustments and parts combinations effect the performance.

It makes sense to do the first run of a freshly rebuilt or new engine on a dyno.  The engine can be pre-lubed and pre-heated before it's started.  Engine break-in routines specified by cam and ring manufacturers can be accomplished under controlled conditions.  Engine integrity is verified before going through the work of installing it in the car.  Fluid leaks and unusual engine noises can most often be repaired easily on the dyno.  Ignition and fuel tuning adjustments can be made and verified with simulated loads.  Blow-by can even be monitored as the piston rings seat.

Results can be documented so you have a record of your tuning adjustments and engine specs for verification or comparison later, or for the buyer if you ever sell it.

Won't It Hurt My Engine?

No.  The engine will only see what it will see under it's intended use.  Engine RPM is limited to what the actual maximum engine output is.  There is no need in whipping a simple street engine to 7000 RPM when it make it's HP peak at 5500.  Free revving an engine is hard on things, the dyno is always applying load to control RPM, so it is easier on the engine than running it in the car or on a simple run stand.  There are safeties programmed and monitored on the dyno to shut down the engine if anything goes beyond these limits, such as low oil pressure.
This is not to say bad things CAN'T happen on the dyno.  Parts failures are not completely unavoidable, and are generally the result of poor quality components or improper assembly.  The dyno testing process will pinpoint problems that would happen even if it wasn't on the dyno.  With the level of monitoring and control the dyno provides, most can be found and fixed before they result in a catastrophic failure. 

Can't I Just Tune My Engine At The Track Or On The Street?

Sure.  But how do you know you are getting consistent results?  Traction variables, inconsistent driving techniques, weather changes, or even the skills needed to read a spark plug properly can effect your "measurements".  How much time and expense would you have in hauling your car to the track and testing repeatedly vs. a couple hours on the dyno...and be able to accurately rely on your results?  
Tuning adjustments and parts changes can be compared run to run, with accuracy to fractions of a unit.  Being able to overlay data graphs of each run to pinpoint differences is an extremely powerful tuning tool.  Something you would never be able to do with your butt in the seat.

How Long Does It Take?

This depends on how prepared you are, what you want to test/change, and if you run into troubles.  Typically a mild street engine that is completely assembled and ready to run, and requires only routine break-in and basic tuning, takes 2-4 hours.  Others that want to try lots of things, or swap major parts, can turn into days.  
To make the best use of your time on the dyno, be prepared!  If you have questions, need some parts, or just need some assistance with your final dyno prep, we will be glad to help you.  Click over to the What To Bring link for a checklist of what you will need for your day at the dyno.

How Much Does It Cost?

Again, this depends on how much time it takes to accomplish your goals.  Don't cut your time short.  It's much better to spend all the time you need to try the things you want, than regret NOT doing something for the sake of a few minutes or a couple extra bucks.  Cost for a dyno session is based on equipment usage fee(per day), plus our hourly shop labor rate.  Multi-day sessions available, so if you want to try some major parts swaps and can do all the wrenching, you will not be charged an hourly labor rate if our tech is not involved.


Dyno Usage Fee:  $150/day

EFI Fuel System and ECU:  $20/day

8 Channel EGT:  $10/day

8 Channel Wideband O2:  $10/day

Dry Sump Oiling System - Pump/Tank/Filter: $20/day


Tech:  $85/hr




563-686-4201                                    mail@iaspeed.com
IA Speed & Supply    15156 Bellevue-Cascade Rd    Otter Creek, IA   52079