Don't know about how much is too much but if 500hp at the block is your goal then the stock config of a Magna Charger running there stock program will get you that.
I have not had custom tunning yet and I'm still getting 12.5 mpg on the frw running at 80mph. So without changing the pully size just slap on an SC add headers and a cat back system and you're good to go for your goal of 500hp
I agree fully that dyno tuning is great if you can find a 4x4 dyno. There don't seam to be many in the country. LAPD (Los Angels Performance Division) in Chatsworth Ca is the closest one I could find using Vegas as the center point of the search.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Fastest H-Town Realtor:
How much boost is to much for the stock bottom end? My figure is about the 500HP mark, or 5-6lbs. Is the H2 6.0L a LS6 engine?
Anytime you change the performance of your vehicle, I would suggest dyno tuning for the best fuel ratio and power. "Tune inna box" is close, but each vehicle is a little different. The servo idea is good even if you don't add a blower. It is an easy mod that takes maybe 45 minutes to do.
TAZ- Could you elaborate a little more on the vacuum modulator? Does this effect the ECM? How do you set yours? How do you reference the signal? Thanks.. </div></BLOCKQUOTE>