A friend of mine has a trans am m6 lt1 , he currently has all the bolt ons + a hotcam , he just dyno 325rwhp, he wanted to know what hp gains can he expect if he ported and polish the heads on his car.

 

Depends on who does it... vague question.

 

well its gonna be done by a very well respected mechanic.

 

There's a big difference b/w a well respected mechanic and someone who really knows what they're doing when it comes to porting heads.

 

ok if the mechanic knows what he is doing and has done lot of port jobs.Then what difference should it make in rwhp

 

Still way too vague. Most people who post up results of locally ported heads are putting down #'s on par with cam only cars. If your friend wants proven heads that made 405rwhp and trapped 118mph in a full weight car tell him to click the link in my sig.

 

ok , if he added to his set up le2 heads then what numbers will he be looking at

 

http://www.virtualengine2000.com/

With the lack of details you're providing you might as well purchase or have your friend purchase some decent technical software rather than just trying to get numerous opinions on what people "think" his numbers will be.

On average with decently ported heads I've seen anywhere from 30-40rwhp gains. When you add a good intake Vs. the stock lt1 & a decent throttle body you could potentially add another 15rwhp.

The hotcam is a mild cam but some have had great results on the track Vs. dyno numbers, IMO track times are more important. With a GM847, stock bottom, full boltons & stock heads with 1.7rrs I put down 375rwhp netting me a humble low 12 1/4mi pass. Just goes to show you a simple cam profile Vs. head work can make a big difference.

 

What was the question again?.?.? Are we fighting a DynoDragon or just a simple DragStrip for real numbers? It makes a difference....

 

Thanks Pepe

 

I made 405rwhp with those heads, but i'de expect 10-20rwhp less with the hotcam over my cam. I also had all the supporting mods except an electric waterpump.