ThunderZ28

iTrader: (7)

Thanks

creederado

Just read it, Nice write up.
You need some Arp Stainless Bolts on Those bad boy headers!!
I can't wait to read what mods you try out in the next issue.

Any word on if when Stainless works will be developing headers and exhaust for the Silverado SS??

JohnUlaszek

I didn't realize the SS had different exhaust needs than a typical 4x4 extended cab. I will talk to SWorks next week and see what the story is. I have to say I love the sound of the exhaust. Everyone that hears it on the dyno raves about how it sounds like a Nextel Cup car at wide open but quiets right down to a nice lopey rumble at idle.

No question the ARP fasteners would have been a nice touch, but I wanted to see if the stock fasteners would get the job done.

Yes, writing for GM Hi-Tech is a pretty sweet deal, and I consider myself lucky to have the opportunity.

creederado

The SS and Sierra Denali/Escalade has a Dual pipe Cat pipe that doesn't y together like the 5.3. From there its dual pipes into the muffler with a signal pipe outlet. The 5.3,6.0 1500 pipes are very similiar with the only differance being the 6.0l' 1500 doesn't y together.The 2500 6.0 pipes are differant than the rest
The Silverado SS catback and y-pipe will fit a Ext Cab 5.3 and I'm in the process of doing it to my GMC. I want to run a catback off a SS so its duals incase I throw a 6.0 in the GMC or Boost.

I attacthed some pics of the Silverado SS pipe ves the 5.3 y-pipe(my 5.3 pipe doesn't have any cats.I also included a pic of the stock GMC exhaust and a pic of a Silverado SS catback taken form about the same view.

JohnUlaszek

Great picturs, that really explains the difference.
I talked to Stainlesswork, they sounded interested in doing a SS exhaust.

John

Sport Side

iTrader: (6)

John,

Was the headers/cat-back tuned for in your test? I wonder how the results would have turned out with an inline air/fuel ratio.

Have you seen the Supermaxx SS header & cat system? If so, this is what I believe Creederado is interested in from Stainless.

JohnUlaszek

The truck has had a stock tune for all tests, I am hoping to change that within the next week. The fuel air ratio was rich as hell and timing was only advancing to 23 degrees, I am certain the lack of a tune left considerable power on the table. The air fuel ratio was about 11.9:1 on the dyno.

zippy

same here....