Bugblndr

Based on the sound of the car, it's hard to believe its pulling those kind of numbers. The car sounds very tame at idle. I'd imagine at WOT it sounds a little different.

I'm guessing that you're going to kick some serious butt with your new setup this year. Enjoy <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

EuG

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Off-road Xpipe with no cats running into B&B Route66 Exhaust (rather restrictive/quiet mufflers)</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I think Matt forgot to mention that his “mid-pipes” are only 2.5”.
Dual 3” pipes must be worth at least 10rwHP for you. (Other big motored C5s have shown gains of ~15rwHP from going to dual 3”)

Combine that with right size headers and fine-tuning and I think you’ll have no problem hitting 500/500 mark whatsoever! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> (Maybe even more, who knows)
We’ll just have to wonder what a combo like that would’ve made with LS6 heads! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

What impresses me the most is not the peak numbers though. (They’re great don’t get me wrong <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> )
It’s the low end/ mid range TQ. Those curves are just SICK! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

That’s what makes a fun street car IMO <img border="0" alt="[devil]" title="" src="graemlins/gr_devil.gif" /> .
I should know, I have almost identical curve he he <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Too bad my cats and 2.5” exhaust is holding me back on the top, so my peak numbers are not as good <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

Have fun with it! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

MattG

Thanks for the good words guys. I am very happy with the setup. My main problem now seems to be traction on the street. 1/3 throttle in first gear and my 295-35-18 BFG Gforce KDs just ignite, same with rolling on the throttle slowly in 2nd gear. I have a feeling I'm going to be going through a lot of rear tires this summer! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

I know there is still quite a bit of power that can be extracted with some exhaust and tuning changes, but unfortunately due to my recent unemployedness, I will have to stick with only tuning changes! <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

xxxhp

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by EuG:
]I think Matt forgot to mention that his “mid-pipes” are only 2.5”.
Dual 3” pipes must be worth at least 10rwHP for you. (Other big motored C5s have shown gains of ~15rwHP from going to dual 3”)

[/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Eug, what part of the exhaust do you mean by "mid-pipes"? is it the pipe between the cats & the factory H-pipe?

Thanks <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

MattG

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by xxxhp:
[QUOTE]
Eug, what part of the exhaust do you mean by "mid-pipes"? is it the pipe between the cats & the factory H-pipe?
[/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">He is referring to the pipes on my C5 that go directly from the header collectors to the over-the-axle pipes from the mufflers. These pipes are 2.5" in diameter, and flow through an X. When I switch to different headers one day, I will go with a very similar pipe but in 3.0" diameter stanless steel.