Dyno today
Hell ya Sideways!! Thats big pimping. Thats Vortech? Right.
Registered User
Joined: Feb 2001
Posts: 2,895
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From: You wish
We never use the "transmission correction factor or TCF" on my dynapack. The reason is that I believe it is disingenous to multiply results by a correction factor when you don't really know what the losses are (nor the original flywheel hp).
I, and the guys at Dynapack USA, have had several discussions with the home office back in New Zealand, but they still refuse to change it, hence, the need to explain to virtually every single one of my customers what they are seeing
Furthermore, the weight of the wheel/tire combo will affect the difference in readings between a dynapack and roller dynos. The heavier the wheel/tire combo, the bigger the difference.
As a matter of comparison, a completely stock Z06, rated at 405 hp (crank) puts down 380-385 whp (or hub hp) on my Dynapack using the same acceleration ramp profile as Sideway's car. So I think its safe to say that he's running 465-470 hp at the crank.
UL
I, and the guys at Dynapack USA, have had several discussions with the home office back in New Zealand, but they still refuse to change it, hence, the need to explain to virtually every single one of my customers what they are seeing
Furthermore, the weight of the wheel/tire combo will affect the difference in readings between a dynapack and roller dynos. The heavier the wheel/tire combo, the bigger the difference.As a matter of comparison, a completely stock Z06, rated at 405 hp (crank) puts down 380-385 whp (or hub hp) on my Dynapack using the same acceleration ramp profile as Sideway's car. So I think its safe to say that he's running 465-470 hp at the crank.
UL
Joined: Apr 2002
Posts: 4,857
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From: Gold Coast
nice to see so much discussion about dyno results 
I think the moral of the story is that the raw dyno read out is not very useful unless compare to the stock dyno result with same correction factors, dyno and as many other variables as possible. As stated by sideway the final / stock dyno ratio is around 2.
I had a 3.8" pulley with the vortech and ran 14psi at 9500rpm before. I had a custom intake plenum, a custom larger front mounted water-air "radiator", and 9:1 compresion ratio. I got 250rwkw (stock 125rwkw) on a dynodynamic dyno. Around 2x the stock power too. This was done in Australia if that make any difference
From memory, sideway has higher compression ratio than mine, ? around 10:1, head works and a polished stock intake plenum. So his engine is more power efficient than mine for same amount of boost due to the higher static and effective compression ratio. He may get higher boost reading than mine due to the stock intake manifold. I think his result is realistic and fairly accurate.
I am a believer Nicely done sideway.
*Edit: I turned off my Zone Alarm and was able to load the dyno plot. You are at 9krpm not 8.5krpm as I previously thought*
I think the moral of the story is that the raw dyno read out is not very useful unless compare to the stock dyno result with same correction factors, dyno and as many other variables as possible. As stated by sideway the final / stock dyno ratio is around 2.
I had a 3.8" pulley with the vortech and ran 14psi at 9500rpm before. I had a custom intake plenum, a custom larger front mounted water-air "radiator", and 9:1 compresion ratio. I got 250rwkw (stock 125rwkw) on a dynodynamic dyno. Around 2x the stock power too. This was done in Australia if that make any difference
From memory, sideway has higher compression ratio than mine, ? around 10:1, head works and a polished stock intake plenum. So his engine is more power efficient than mine for same amount of boost due to the higher static and effective compression ratio. He may get higher boost reading than mine due to the stock intake manifold. I think his result is realistic and fairly accurate.
I am a believer
Nicely done sideway.*Edit: I turned off my Zone Alarm and was able to load the dyno plot. You are at 9krpm not 8.5krpm as I previously thought*
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Joined: May 2002
Posts: 3,178
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From: Washington State
Originally Posted by Sideways,Mar 4 2005, 12:12 PM
Currently shaved RA-1s, 225/245 in 16. Marty has some 235/275s in 17 waiting for me.
