i am still waiting for my headers it has been 6weeks now. i am going to get the rest of my system together and am thinking about 3" all the way back. what size are the colectors? if they are smaller than 3" wouldn't it be a waste to run larger pipe than the colecotor?

 

Jim, I don't have them, but I'd imagine that they are 2.5" at the collector, since that is what size pipe that it mates up to. If you ordered for a 6.0, it could be possible that they will send 2 3/4" collector.

You might be able to get an exhaust shop to cut off the flange and expand the pipe some and weld in a new larger flange. Don't know if it will stretch to 3". It also may adversely affect the flow properties of the collector and the position of the front O2 sensors.

Richard

 

2.5"

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">if they are smaller than 3" wouldn't it be a waste to run larger pipe than the colecotor? </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Not necessarily, I removing exhaust or scavenging, creating "chambered" exhausts has many benefits. If you look at many race headers you will see that they have a "megaphone" like funnel expanding the collector size to the remainder of the exhaust tube size. The benefit is heated/pressurized gas is going to try to move to the coolest and largest volume chamber to stablize.

added som pics to illustrate...
<img src="http://www.secureperformanceorder.com/cat_images/502903401.jpg" alt=" - " />
<img src="http://www.burnsstainless.com/Megaphones/a_megaphone1.gif" alt=" - " />

<small>[ June 19, 2002, 09:32 PM: Message edited by: oxidizr ]</small>

 

nice pic's since the header is ceremic coated i am guesing that the colector will be also, maybe it will just be tapered and i can cut it right at the 3" point. i think i am going to go with some dynomax super turbos with the big body, looks like a pair of 5 1/2" by 11" by 20" long should work. and a pair of 3" tail pipes, the tail pipes will need a little modification and from the muffler forward will have to be bent. looks like it is time to break out the credit card again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Why didn't your order from ASM directly?

Richard

 

i ordered mine from one of the links >>>> over there, they were a few bucks cheeper than the AS&M list price and the headers are shiped directly from the manufacture anyway. do you think they would come sooner if i had?

 

yes

Richard

 

does 3 psi really make that much difference <img border="0" alt="[Truck]" title="" src="graemlins/gr_truck.gif" />

 

Hey parish8, I've been waiting for my ASM's too. According to my last email from TBRYNE (6/6) it would be 2 more weeks till the next shipping. Well it's been 2 weeks now. Hopefully, the headers will be shipping out soon.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by badls1truck:
<strong>does 3 psi really make that much difference <img border="0" alt="[Truck]" title="" src="graemlins/gr_truck.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">If you knew what you were talking about, then you'd know he went from a 5.3L to 6.0L. He kept the pulley from the 5.3 kit and, since you have more displacement, then the boost will be less. That means that if you give the 5.3 (325ci) 8psi of boost, then on the 6.0 (364ci?) the boost will be less b/c of the extra 39ci that has to be filled with air.