[Z06] only 323 rwhp!!!!
Melting Slicks
Joined: Aug 2002
Posts: 2,737
Likes: 2
From: California USA
Re: only 323 rwhp!!!! (dvandentop)
When it was on my car the Vararam caused a severe, uncorrected lean condition and a loss of power. The reason was corrupted airflow through the mass air flow meter. Your PCM can not correct this situation. You must tune the car via pcm to correct this.
Also, at 1400ft, expect at least a 8% loss in hp at STP. Figure 50% loss of 02 at 18,000ft.
[Modified by 427CPE, 7:54 AM 10/27/2003]
Also, at 1400ft, expect at least a 8% loss in hp at STP. Figure 50% loss of 02 at 18,000ft.
[Modified by 427CPE, 7:54 AM 10/27/2003]
Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
Re: only 323 rwhp!!!! (dvandentop)
it was 37 outside so i am assuming maybe 40 something since the shop door was open
Your ambient was way below 77 degrees F. Chances are good that your power displayed in SAE would have been lower than the uncorrected power value.
Thread Starter
Race Director
Joined: Dec 2000
Posts: 14,697
Likes: 584
From: Sioux Falls SD
Re: only 323 rwhp!!!! (427CPE)
When it was on my car the Vararam caused a severe, uncorrected lean condition and a loss of power. The reason was corrupted airflow through the mass air flow meter. Your PCM can not correct this situation. You must tune the car via pcm to correct this.
[Modified by dvandentop, 9:57 AM 10/27/2003]
Melting Slicks
Joined: Aug 2002
Posts: 2,737
Likes: 2
From: California USA
Re: only 323 rwhp!!!! (dvandentop)
Check out this link. It will help you calculate hp changes due to weather conditions.
http://wahiduddin.net/calc/calc_hp_dp.htm
http://wahiduddin.net/calc/calc_hp_dp.htm
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Instructor
Joined: Aug 2003
Posts: 109
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From: Richmond VA
Re: only 323 rwhp!!!! (dvandentop)
I am unsure why this is suprising anyone. A stock Z06 is running about 385 at the crank (so they say - and I believe it). At the rule of thumb number for transmission losses and the such (15% loss), the RWHP is 327. Close enough for me to say, o.k. To break 400 at the rear wheels, need about 470 at the crank. The Borla should add a little, but no more than a couple of RWHP without intake mods.
Team Owner
Joined: Mar 2001
Posts: 25,889
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From: Virginia Beach
CI 3-5-6-7-8 Veteran
Re: only 323 rwhp!!!! (dvandentop)
Most people agree that 385 hp is underrated.. most are 340 to 350. BTW my '01 w/ a vortex and stingers trapped at 114. The lower tension rings cause some excess blow-by but shouldn't hurt compression. Glad the dyno numbers are up. I'm may hit the dyno this Sunday. :cheers:
Melting Slicks
Joined: Mar 2001
Posts: 2,372
Likes: 51
From: New Milford CT
Re: only 323 rwhp!!!! (dvandentop)
So how does the car feel SOTP now and before. If there was a real differece in that much rwhp then you would feel the difference. If it was just a "bad" dyno run then the car would have felt the same to you.
Melting Slicks
Joined: Jul 2003
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From: All Liberals must hang
St. Jude Contributor
Re: only 323 rwhp!!!! (rbartick)
it was 37 outside so i am assuming maybe 40 something since the shop door was open
Dyno numbers corrected to SAE J1349 alter the data to make it seem as if it was taken when the atmospheric pressure was 29.23 in/hg., the temperature 77 degrees F and the humidity zero.
Your ambient was way below 77 degrees F. Chances are good that your power displayed in SAE would have been lower than the uncorrected power value.
Dyno numbers corrected to SAE J1349 alter the data to make it seem as if it was taken when the atmospheric pressure was 29.23 in/hg., the temperature 77 degrees F and the humidity zero.
Your ambient was way below 77 degrees F. Chances are good that your power displayed in SAE would have been lower than the uncorrected power value.
RB, you blow my mind. :confused: Man you know alot about Dynos :cheers: