[Z06] mods and torque
Thread Starter
Instructor
Joined: Jan 2003
Posts: 104
Likes: 0
From: Lexington KY
mods and torque
I had some mods done recently (cam, heads worked, headers, pcm calibrated) and I am disappointed by the dyno torque numbers, which indicated 403 RWT at about 5500rpm. Really, I didn't get any indicated increase in torque until about the 5500 rpm over stock figures. What the hey! I was certainly wanting the torque increase to be at a much more useable rpm range. The cam was 228/228 .588/.588 112. Any comments? :confused:
[Modified by FST NUF, 9:56 PM 5/5/2004]
[Modified by FST NUF, 9:56 PM 5/5/2004]
[Modified by FST NUF, 9:56 PM 5/5/2004]
[Modified by FST NUF, 9:56 PM 5/5/2004]
Thread Starter
Instructor
Joined: Jan 2003
Posts: 104
Likes: 0
From: Lexington KY
Re: mods and torque (Goody)
Stainless works LT headers, heads were cnc ported and milled to 11.1 compression, DTE performed work.
[Modified by FST NUF, 11:07 PM 5/5/2004]
[Modified by FST NUF, 11:08 PM 5/5/2004]
[Modified by FST NUF, 11:07 PM 5/5/2004]
[Modified by FST NUF, 11:08 PM 5/5/2004]
Le Mans Master
Joined: Oct 2000
Posts: 6,362
Likes: 30
From: Oak Harbor WA
Re: mods and torque (FST NUF)
Well you opened up the heads and opened up the exhaust. That usually relates to less TQ and usually more HP. The cam is certainly a factor as well. Give guys some time to answer. Have you posed this question in the engine/mods section?? Gearheads abound in there.
What was the dyno run before the mods? Was it done on the same dyno? That is surely needed for the sake of consistency.
Good luck with your search.
What was the dyno run before the mods? Was it done on the same dyno? That is surely needed for the sake of consistency.
Good luck with your search.
Melting Slicks
Joined: Jan 2004
Posts: 2,158
Likes: 4
From: Henderson Nevada
Re: mods and torque (Goody)
Well you opened up the heads and opened up the exhaust. That usually relates to less TQ and usually more HP. The cam is certainly a factor as well. Give guys some time to answer. Have you posed this question in the engine/mods section?? Gearheads abound in there.
What was the dyno run before the mods? Was it done on the same dyno? That is surely needed for the sake of consistency.
Good luck with your search.
What was the dyno run before the mods? Was it done on the same dyno? That is surely needed for the sake of consistency.
Good luck with your search.
You can sometimes get back the low end torque by using a cam that allows retiming. A senior moment has taken over, and I forget whether you want to advance the cam or retard it...
Burning Brakes
Joined: Mar 2002
Posts: 1,176
Likes: 0
From: highland village texas
Re: mods and torque (FST NUF)
403rwtp is pretty good...i have similar mods and tq and when having work done i asked tuner to help me not lose low end tq...after install and tuning RPM overlaid pre and post dyno charts and i had more tq across the full rpm range, same for hp.... i assume tuning helped.
[Modified by C5 CU, 1:23 PM 5/6/2004]
[Modified by C5 CU, 1:23 PM 5/6/2004]
Team Owner
Joined: Jul 2003
Posts: 34,299
Likes: 1
From: [Enter Unoffensive Comment Here]
Cruise-In VI Veteran
Cruise-In VII Veteran
St. Jude Donor '06
Re: mods and torque (FST NUF)
Those actually sound like good tq numbers. :yesnod: I'm not sure what you are referring to as far as stock tq...the numbers would not have been anywhere close to that. :confused:
:cheers:
:cheers:
