David Buschur

iTrader: (53)

Today I got a call from Tym Switzer from Switzer Performance and Innovation. Told me he had an EVO9 over there on his Dynojet AWD and wondered what we were making here for power. I told him an EVO9 will make between 200 and 215 on our dyno, typically. He said he just dyno'd one that made 281 whp and 273 ft lbs of torque.

This particular car has just a catback exhaust, nothing for a reflash.

I told him to bring it over and we'd compare it on our dyno. Same car, same day, two curious shop owners and see what the differences are.

On the way here he logged boost (note pad) and AFR's.

We pulled the car onto our MD500 AWD dyno, just as it was dyno'd on the his dyno.

First and 2nd pull were exactly the same right down to the single horsepower. On our MD500 AWD the car made only 218 whp and 214 ft lbs of torque!

This is a difference of 63 whp and 59 ft lbs of torque. That is a 22% difference.

Now anyone in doubt of this you have to understand Tym and I have nothing to gain, we wanted to put an end to the guessing. This is as fair as a test is going to get.

As a side note, on his dyno he ran the EVO in SAE correction, the correction factor was like .94, on our dyno the correction factor was .95. I am sure the weather and temps were not identical as our two cities are 30 miles apart.

Something else. My wide band is getting slow and about done, the sensor needs changed from all the race gas. Anyway, we logged AFR's on my dyno and compared them to his road notes from the trip here. They were close in some spots and not so close in others. I know for a fact with a fresh wideband actually installed in the exhaust that the dyno AFR's are dead on with the street. I pulled the car again and this time looked at the AF meter in the car. I noted that at 5,000 rpm the AFR was 11.2:1 in the car. When I was done I yelled this number to Tym and he verified that on the road the AFR's at 5,000 rpm was 11.3:1. Like I keep saying, dead on for tuning.

So there it is. The difference between a Dynojet AWD dyno and a Mustang AWD dyno, same day, same car, same tune and no games being played. Just good information.

To put this a little further. It would be nice for us to use a Dynojet for our BR330 and BR350 packages. This would allow us to show basically flywheel HP numbers on the car stock (Stock EVO9 rated at 286, makes 281 on dynojet) and then after wards we'd be showing 351 whp on the BR350 cars.

Let the comments commence

David Buschur
www.buschurracing.com

Torquefanatic

Very interesting info for us in the UK, as I'm sure it is for you.

How does this compare to Dyno Dynamics?

Thanks
Simon

evoviiiyou

iTrader: (3)

This type of comparison is phenominal! Great for everyone in our community! This is what is all about...Merry Christmas to you David...and keep the info comming! We appreciate it.

DaWorstPlaya

iTrader: (31)

Merry X-mas and a Happy new year Dave. Thank you for sharing this info with us!!! Your contributions to the EVO community have been nothing short of phenominal

naucrx

iTrader: (19)

Oh wow, nice comparison!

I've thought about doing a test like this myself as there is a Dynojet and MD here in town.

David Buschur

iTrader: (53)

Well Tym is owed some thanks too, he initiated the call and comparison.

David Buschur
www.buschurracing.com

evoviiiyou

iTrader: (3)

Classy

Ted B

iTrader: (6)

The way Mr. Buschur has his configured, the numbers appear to be very, very comparable.

EvoTech

iTrader: (25)

Nice job on an apples to apples comparison!

jj_008

iTrader: (8)

These new Mustang Dyno's are reading pretty close to DD now.

housedj

iTrader: (2)

Dyno Dynamics is closest in ratings to a Mustang Dyno. it does rate a little higher than the MD depending on the load setting. either a DD or MD dyno is the way to go for the most accurate readings. if you notice, all the magazines use a Dynojet so the cars on the cover can have an "inflated" number...

Fourdoor

iTrader: (11)

As soon as the name "Shiv" was mentioned, the thread went to hell pretty fast.

Cleaned up and locked.

Keith