Dyno Testing at VIPER lab, VIR

VIPER Performance Lab

I read about the Virginia Institute for Performance Engineering and Research (VIPER) at Virginia International Raceway (VIR) in the January 2009 issue of Classic Motorsports. VIPER is a joint venture involving Virgina Tech, Old Dominion University, VIR and the Institute for Advanced Learning and Research. Being only about three hours away, I decided to visit VIPER and make some dyno runs to determine the performance statistics for “The Bloody Beast” and to try to improve the timing and carb tuning to enhance performance. Victor Seaber was the engineer with whom I worked. He was assisted by Corey.

Victor Securing the Beast

Victor Securing the Beast

Exhaust Gasses Sensor

Exhaust Gasses Sensor

Ready to Roll

Ready to Roll

“The Bloody Beast” isn’t a race car so peak power and maximum performance weren’t too important to me. I told Victor to only push it to 4,500 rpm. I was much more interested in having the car run efficiently at highway cruising speed, say 65-70 mph.

Victor at Work

Victor at Work

I had read about performance results for other Healeys and was prepared to discover that horsepower and torque ratings were optimistically stated in factory publications. My actual performance data confirmed what others had concluded.

Monitoring Screen

Monitoring Screen

Another Monitor

Another Monitor

Rear wheel HP was 113.2. I was taught to calculate flywheel output by dividing the rear wheel output, 113.2, by .85 (the 15% drivetrain loss on a solid axle car) giving 133.2 hp at the crank.

Rear wheel torque 146.8

Dyno Results

Dyno Results

Disappointment of the day – there was no instrumentation (digital or analog) that could measure the smile on my face from driving “The Bloody Beast” the three hours from my home to the lab!

Most satisfying experience of the day – We changed almost nothing about the setup of the car. We experimented with timing (but returned to original setting) and did enrich the mixture at high speed ever so slightly. So, I was happy to have my previous work validated rather than disappointed with how out of tune the car might have been.

 

 

 

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2 Responses to “Dyno Testing at VIPER lab, VIR”

  1. Mick Nordquist says:

    Lin, what would you recommend I read to learn more about Healey performance results and preparing for dyno testing. Most likely, my next visit to Denver will be in the fall and I am hoping I can arrange a dyno test while I am there. Mick

  2. valv8988 says:

    Hmmm, I don’t know a lot about the technical aspects. I am sure that just googling the subject would give you a wealth of information. I was primarily looking at optimizing the air/fuel ratio. The HP stuff was just for fun. As I said in the post I was really trying to maximize performance at highway speed as opposed to “balls out peak performance.”

    I know that Steve has had his car on a dyno a couple of times, so I am sure he could be helpful. You could also check the archives in the British Car Forum http://www.britishcarforum.com/, as I recall the process has been discussed there several times in recent years.
    Lin

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