How much HP does the Z06 heads add....
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
How much HP does the Z06 heads add....
I have asked that same question myself. Friday, I'll be putting on a set of 02 Z06 heads (stock) and see how what kind of gains I get. Car was just dyno'd a couple of weeks ago, haven't added anything else...so this should be a pretty good comparison.
I'm thinking about 15-20 if I'm lucky...we'll see.
I'm thinking about 15-20 if I'm lucky...we'll see.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Interested to hear your HP gain. I put a set of 02 ZO6 heads and the ZO6 cam..on my '97 A4. I haven't had it dynoed yet. But I don't have a comparison to judge by. My other mods are: 160 tstat, Blackwing, LS6 intake, ASP UD Pulley, LS6 p&p TB, hi-flo cats, x-pipe and ZO6 Ti exhaust.
Pro
Joined: Oct 2000
Posts: 732
Likes: 1
From: Sierra Vista, Arizona
Originally Posted by RstyNutz
Interested to hear your HP gain. I put a set of 02 ZO6 heads and the ZO6 cam..on my '97 A4. I haven't had it dynoed yet. But I don't have a comparison to judge by. My other mods are: 160 tstat, Blackwing, LS6 intake, ASP UD Pulley, LS6 p&p TB, hi-flo cats, x-pipe and ZO6 Ti exhaust.
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
Originally Posted by Norris
I have a 2001 Coupe with an automatic transmission. I am running a set of Z06 heads and Z06 cam from a 2004 Z06. It dyno'd 347 RWHP. I don't know if that is good or not. I was hoping for a little better considering the mods in my signature.
Pro
Joined: Oct 2000
Posts: 732
Likes: 1
From: Sierra Vista, Arizona
Originally Posted by muncie21
I think you are right on target, considering your Mods. Stock Z06 makes 405 at the crank. Considering they are manual, this equals to 344 (405 * .85) at the wheels. Yours is an auto, so with Z06 parts you can figure on about 324 (405 * .8) , add 20 HP for the headers and pooff...about what you have right now.
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
Originally Posted by Norris
I apologize for "Hogging" the thread, but I have a question, is that figured at a 20% drive train loss for the A4. I was thinking the drive train loss for a straight shift was approximately 15% and for an automatic, 18%. Thanks in advance for the info.
I was able to lose (unintentional) 20 ft/lbs on the dyno by dropping commanded AFR by 1 point. Can't remember the HP loss, but it was pretty good also. Point is, since we aren't dyno racing, average numbers are fine.
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Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
Originally Posted by muncie21
I've seen people use both. If your case the difference is around 8HP. That could be gained/lost via tuning, gas quality, ambient temp, engine temp, etc.
I was able to lose (unintentional) 20 ft/lbs on the dyno by dropping commanded AFR by 1 point. Can't remember the HP loss, but it was pretty good also. Point is, since we aren't dyno racing, average numbers are fine.
I was able to lose (unintentional) 20 ft/lbs on the dyno by dropping commanded AFR by 1 point. Can't remember the HP loss, but it was pretty good also. Point is, since we aren't dyno racing, average numbers are fine.
Last edited by ArKay99; May 2, 2006 at 04:54 PM.
