Tales from the dyno

Dyno charts are published in Adobe Acrobat format. You will need the free reader from Adobe if you don't have it.

Almost all runs are on either our old in-house Dynojet or our new Rototest, using 91 octane gasoline. Our shop is located at 4700' altitude, and the SAE correction factor is used. There is some controversy about the accuracy of this factor for turbocharged cars running an electronic boost control system (as many of ours do), but we continue to use it for consistency and because nobody has been able to come up with a factor that is agreed upon.

The Rototest dyno charts usually have a small dip in the torque curve right after the peak is reached. This is due to the dyno reacting to the change in power output and is not indicative of how it will behave on the road. All turbo cars are tested with turbo exhausts unless noted otherwise.

Superchargers tend to make more boost at lower altitudes as the compressors become more efficient, but the correction factor is consistent at the boost levels quoted over ambient.

Turbocharged and supercharged cars

The big daddy.
The most power we've seen on our dyno! So far...
A stroker engine with a 3071 FM II, water/methanol injection and GM LS coils. It's equipped with the smaller of our intercoolers and a standard FM turbo exhaust and is running 91 octane pump gas with a conservative map. Corrected is 23 psi (gauge), uncorrected is 19 psi absolute.
All wrapped up in a 1993 that looks bone stock. How's that for a sleeper? Once the car came off the dyno, the owner drove it home 1350 miles home.

Igor
We took a 1999 salvage car and installed an FM II with one of our complete 3" exhaust systems. This chart shows the result as an uncorrected number at 9 psi of boost - that's different from most of the other charts on this page.

Modified Mazdaspeed Miata
A Mazdaspeed with our FMII upgrade as well as a Hydra, intercooler and FM exhaust. Unlike most of the runs on the site, this is on 93 octane gas. That extra octane makes a big difference.

Modified Mazdaspeed Miata
A Mazdaspeed with our Big Enchilada upgrade. This is the currently available version of the package without the upgraded turbocharger.

Modified Mazdaspeed Miata
We took our Mazdaspeed and installed our Big Enchilada upgrade. The result? An extra 115hp! Please note that the upgraded turbo used in this dyno chart is no longer available.

Mazdaspeed Miata with FM intake and downpipe
Talk about bang for the buck! In run 1, the car is equipped with an FM downpipe, exhaust and intercooler. That's the sort of power we expect from that combination. Then we added our complete intake kit and saw power and torque jump up considerably. This chart is also available with A/F ratios.

1990 Voodoo II
This dyno chart is uncorrected. Why? Because the power output is limited by the injector size. It's as fast as a corrected 190 rwhp car at this altitude, but it can't make 190 rwhp at sea level. Ahh, correction factors, gotta love 'em. If you have questions, contact us.
That said, this car is making 7 psi on the gauge. It's a stock Voodoo II with an MSD ignition box added and an FM naturally aspirated dual exhaust system.

2.0 U3 supercharger
A U3 supercharger at 13 psi on a 2.0 motor with all sorts of headwork. This is a fast car.

2.0 FM II
FM II at 12 psi on a 2.0 motor. The turbo is actually a little small for this application. See the "comparisons" section further down the page to see what a larger turbo can do.

1999 Uber U1
Our U1 supercharger on a 1999 with a stock engine. The car has FM naturally aspirated midpipe and exhaust along with a Jackson Racing header.

1999 Uber U2
Our U2 supercharger on a 1999 with a stock engine. The car has FM naturally aspirated midpipe and exhaust.

1995 Uber U3
Our U3 supercharger on a 1995 with a stock engine. The car has aftermarket "brand X" exhaust components and is running at the recommended boost level.

2001 FM II
FM II at 9 psi on a stock engine.

1999 FM II
FM II at 9 psi on a stock engine.

1999 FM I
FM I at 6 psi on a stock engine.

1999 Voodoo Turbo
Voodoo Turbo at 6 psi on a stock engine.