Rear Wheel HP - Stock
Racer
Joined: Jan 2014
Posts: 400
Likes: 37
From: Lone Star State
15% drivetrain loss is an accepted amount, so 436 hp x .85 = 371 whp as an approximation.
So, 370ish, but it also depends on the dyno and testing conditions. And automatics have more drivetrain loss than manuals.
So, 370ish, but it also depends on the dyno and testing conditions. And automatics have more drivetrain loss than manuals.
Last edited by Suds; Oct 10, 2014 at 07:17 PM. Reason: Corrected wording, because I sounded uneducated!
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,631
Are we talking Dyno armchair bragging right numbers, or the hobbling numbers of the TM that is limiting the amount of power that the car will put down to the ground at any give time instead.
Tuning a stock motor is not about the few HP's that you can pick up with the tune, but instead stopping the hobbling that the TM is doing, cleaning up shifting in a Auto trans, pedal to TB response sharpening, and even quick'g the delayed decay back down to idle so you can control the back end of the car via throttle feathering.
Tuning a stock motor is not about the few HP's that you can pick up with the tune, but instead stopping the hobbling that the TM is doing, cleaning up shifting in a Auto trans, pedal to TB response sharpening, and even quick'g the delayed decay back down to idle so you can control the back end of the car via throttle feathering.
Thread Starter
Pro
Joined: Mar 2002
Posts: 576
Likes: 48
From: Woburn MA
Thank you guys...
I just got a tune from a local shop and wanted some baseline.
The post tune pull came out at 386 HP @ 6,000 rpm, torque was 378 ft-lbs
The car was mainly tuned for street drivability and improved shifting (A6), It now shifts with more authority and at speeds that seem more appropriate for "spirited driving"
Thanks for the responses
I just got a tune from a local shop and wanted some baseline.
The post tune pull came out at 386 HP @ 6,000 rpm, torque was 378 ft-lbs
The car was mainly tuned for street drivability and improved shifting (A6), It now shifts with more authority and at speeds that seem more appropriate for "spirited driving"
Thanks for the responses
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Melting Slicks
Joined: Sep 2008
Posts: 2,360
Likes: 59
From: San Jose California
Are we talking Dyno armchair bragging right numbers, or the hobbling numbers of the TM that is limiting the amount of power that the car will put down to the ground at any give time instead.
Tuning a stock motor is not about the few HP's that you can pick up with the tune, but instead stopping the hobbling that the TM is doing, cleaning up shifting in a Auto trans, pedal to TB response sharpening, and even quick'g the delayed decay back down to idle so you can control the back end of the car via throttle feathering.
Tuning a stock motor is not about the few HP's that you can pick up with the tune, but instead stopping the hobbling that the TM is doing, cleaning up shifting in a Auto trans, pedal to TB response sharpening, and even quick'g the delayed decay back down to idle so you can control the back end of the car via throttle feathering.
+1 on the TM, it makes a big difference.
Dyno jet (2 different ones) 08' NPP 6 speed at 1000 miles, was right at 390 rwhp, the torque was pretty close as well.
DJ
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
I've been told by a couple of vendor/tuners on CF that a tune for a stock car will not net very much but in the range of 12-15. Your results seem to indicate that quite well even if your car started at 370 as a baseline. Be happy with the increase.
Le Mans Master
Joined: Jul 2005
Posts: 5,328
Likes: 405
Le Mans Master
Joined: Jul 2005
Posts: 5,328
Likes: 405
Thread Starter
Pro
Joined: Mar 2002
Posts: 576
Likes: 48
From: Woburn MA
This tune was more about throttle response and Tranny tuning to quicken shifts, remove some of the lags and improve spirited drivability
