GT4 Dyno results
Rennlist Member
Joined: Mar 2009
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On a Dynojet with SAE smoothing, the 997 GT3 gets about 380 and the RS about 405 whp. Pretty consistent +/- 10whp based on temps and shop.
Are you saying the GT4 is 400 whp SAE - or is that estimated engine output?
Are you saying the GT4 is 400 whp SAE - or is that estimated engine output?
Burning Brakes
Joined: Mar 2015
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From: Stevenson Ranch, CA
That can't be WHP. It is BHP interpolated from WHP readings.
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From the website:
We house a SuperFlow AutoDyn 30 AWD Chassis Dynamometer that can accurately measure 1200+ whp (wheel horsepower) and speeds of 200 mph (300kph) using the latest technology in electronic data acquisition and practical engine function graphing techniques.
Our AWD Chassis Dynamometer combined with our Drive Wind Simulation and Air Flow Systems realistically simulate the road conditions in test operations.
We house a SuperFlow AutoDyn 30 AWD Chassis Dynamometer that can accurately measure 1200+ whp (wheel horsepower) and speeds of 200 mph (300kph) using the latest technology in electronic data acquisition and practical engine function graphing techniques.
Our AWD Chassis Dynamometer combined with our Drive Wind Simulation and Air Flow Systems realistically simulate the road conditions in test operations.
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Joined: Jul 2007
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From: Ormond Beach, FL
Would be nice to see the actual wheel power and torque numbers and maybe a dyno graph? Any chance?
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Joined: Sep 2015
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From: Hong Kong
Some dynos back out the crankshaft number
Anyway, it would be more useful if there were comparisons of this particular dyno with a 991.1 C2S, and/or more info about the dyno machine and any relevant graphs with the original HP at the wheels as well.
Anyway, it would be more useful if there were comparisons of this particular dyno with a 991.1 C2S, and/or more info about the dyno machine and any relevant graphs with the original HP at the wheels as well.
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Burning Brakes
Joined: Mar 2008
Posts: 945
Likes: 6
From: Merica
Having ripped through the gears in mine a bit now I would say there is no way in hell this car is making more than 330whp on a typical Dynojet. I would guess between 310-330whp. My usual shop went out of business otherwise I could get some numbers and have a bunch of other cars from that dyno to compare to.
4th Gear
Joined: Jan 2008
Posts: 4
Likes: 0
There is a detailed thread on planet-9 showing a GT4 achieving 325WHP on a MAHA dyno... not sure how they compare to a Dynojet.
http://www.planet-9.com/porsche-dyno...gt4-gts-s.html
http://www.planet-9.com/porsche-dyno...gt4-gts-s.html
Race Car
Joined: Oct 2004
Posts: 3,899
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Having ripped through the gears in mine a bit now I would say there is no way in hell this car is making more than 330whp on a typical Dynojet.
When I was into drag racing muscle cars back in the 70s, we would measure our performance mod HP gains based on 1/4 mile times at the track. We were able to quickly dispel some of the exaggerated HP claims by some performance companies with a trip to the drag strip.
When I was into drag racing muscle cars back in the 70s, we would measure our performance mod HP gains based on 1/4 mile times at the track. We were able to quickly dispel some of the exaggerated HP claims by some performance companies with a trip to the drag strip.
Racer
Joined: Jun 2014
Posts: 293
Likes: 1
From: OC CA
There is a detailed thread on planet-9 showing a GT4 achieving 325WHP on a MAHA dyno... not sure how they compare to a Dynojet.
http://www.planet-9.com/porsche-dyno...gt4-gts-s.html
http://www.planet-9.com/porsche-dyno...gt4-gts-s.html
I've put on about 1200 miles so far on my GT4, it feels about 330 whp.