If I trade with a friend for a factory firehawk exhaust, and put a cutout on it??? What kind of gains will I see??

 

Probably 1hp or so. You already have a free flowing 3" exhaust, downgrading to a 2.75 but with a cutout will probably be about the exact same power. Unless it's the optional dual/dual exhaust, then maybe another handful of hp.

Dope

 

You already have the most free flowing exhaust. You'll be downgrading (in terms of flow) if you trade for the firehawk exhaust. The cut out will be the only source of extra power.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Dope:
<strong> Probably 1hp or so. You already have a free flowing 3" exhaust, downgrading to a 2.75 but with a cutout will probably be about the exact same power. Unless it's the optional dual/dual exhaust, then maybe another handful of hp.

Dope </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Firehawks come with the SLP Dual Dual as standard equipment. It has a 3" intermediate pipe and free flowing muffler, but quiet. Your SS may have a 2 3/4" inetermediate pipe if it did not come with any Y2Y options.

 

I think the SLP D/D will dyon very close to what a Loudmouth will for a bolt on car. My car gained 12rwhp w/the cut open vs the SLP D/D in one set of dyno test. In another set of dyno test for my car the SLP D/D was with in 1rwhp of the cutout.

If you just have to have the few extra ponies the cut out is worth with the D/D get an electic cut out.

SLP D/D is 3 inch as stated above. It's my favorite exhaust because it flows very well and is very quiet. My car can passes for the typical LS1 with a typical catback when it's warmed up.

IMO Hooker LT's w/offroad pipe + loudmouth = Too Loud.

A FireHawk or SS D/D will have the ring of silence in the left outlet. This was due to factory noise standards. If you get the FireHawk D/D make sure you removed the ring of silence from the left side. The D/D sold direct from SLP (like mine) don't have the ring od silence. Friend of mine has a FireHawk and his D/D was always quiter than mine. His left exhaust tips never got dirty either.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 99 Black Bird T/A:
<strong> A FireHawk or SS D/D will have the ring of silence in the left outlet. This was due to factory noise standards. If you get the FireHawk D/D make sure you removed the ring of silence from the left side. The D/D sold direct from SLP (like mine) don't have the ring od silence. Friend of mine has a FireHawk and his D/D was always quiter than mine. His left exhaust tips never got dirty either. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Good info. I've seen some mention of an 'aftermarket' version of the dual/dual, but never heard how it differed from the SS option.

 

What did the different exhausts do to the peak torque as well as the shape of the torque curve?
Also is the ring of silence in every factory car? I do get soot on my left tip. Is it just something the cram in there or is it tack welded?

 

The Loudmouth is only gonna be slightly better than the Firehawk D/D.

The cut-out should get you an extra 4 or 5.

 

Huh, weird. I was always sure that the stock factory SS and WS6 and Firehawk all had the same exhaust. The SS and the Firehawk having the optional D/D exhaust. Can anyone verify that this isn't true?

Dope

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Dope:
<strong> Huh, weird. I was always sure that the stock factory SS and WS6 and Firehawk all had the same exhaust. The SS and the Firehawk having the optional D/D exhaust. Can anyone verify that this isn't true?

Dope </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">WS6 is produced by GM. Firehawk and SS's are produced by SLP with the D/D exhaust from SLP.
Maybe you didn't understand 2xLS1's above post <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Dope:
<strong> Huh, weird. I was always sure that the stock factory SS and WS6 and Firehawk all had the same exhaust. The SS and the Firehawk having the optional D/D exhaust. Can anyone verify that this isn't true?

Dope </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I think that they all have different exhausts stock, and the SS could get the same as the Firehawk as an option from SLP. ASC took over the WS6 and they use their own free flowing exhaust (anyone know where they got it from? - probably Walker's OEM group?)

What exactly is the dual/dual? Are you talking about the dual tailpipes? My car has a single 3" catback with a funky looking welded box type muffler and two tailpipes with two tips each. Is this the D/D?

Thanks for the info.

-Geoff

 

All of the exhaust systems on Ws6s are from GM, not ASC. In past years on SSs, the dual/dual was an upgrade option and the base exhaust was the same as the Ws6. I'm not sure if that has changed for newer year SSs though. Also in years past, you could get an upgraded catback as an option for Firehawks as well, but I'm not sure if this was the dual/dual or not. I think it was, but I get a little confused since SLP had the old two-on-the-left systems too. I'm not sure what the base exhaust for Firehawks were/are. And again, I'm not sure if this has changed since then or not.

 

The WS6 exhaust is a lot more restrictive than the SLP dual-dual, I am running the dual-dual on my car right now, I got a cutout as well...

I will open the cutout at the track usually, and a few times on the street, but it has a good sound to it...

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Dope:
<strong> Huh, weird. I was always sure that the stock factory SS and WS6 and Firehawk all had the same exhaust. The SS and the Firehawk having the optional D/D exhaust. Can anyone verify that this isn't true?

Dope </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">WS6 is produced by GM. Firehawk and SS's are produced by SLP with the D/D exhaust from SLP.
Maybe you didn't understand 2xLS1's above post <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, one, or both of us isn't understanding. The SS and WS6 factory exhausts are the same. Free-flowing muffler with different tips, but otherwise identical to the stock ta/formula/z28 exhaust (same 2.75" i-pipe). The D/D is an option on the SSes. I know this because I own and SS and it came with the exhaust I described above, not the D/D.

My question was actually about the Firehawks, are their 'base level' exhausts the same as the 'base level' SS and the WS6 exhausts? Or do they automatically come with the D/D?

I've seen some Firehawks with D/Ds but I can't remember if I've seen them with the normal ss/ws6 exhaust.

Just looking for some proof. I could tell you the moon is blue (IT IS!) but I wanted to know for sure before I take this info as fact, and spread misinformation around.

Dope

 

The Firehawk exhaust is better. You will get a few hp but not much. A better idea would be to get a Dynomax 17227 muffler for $100 and it will flow like a cutout. I am running 500rwhp through this muffler in a catback with hardly any losses over an open y-pipe.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Dope:
<strong>
Just looking for some proof. I could tell you the moon is blue (IT IS!) but I wanted to know for sure before I take this info as fact, and spread misinformation around.

Dope </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">http://firehawk.org/header.html?ID=1695

<img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Need more info on ring of silence . Where is it exactly? How do you remove it? Is there a link to explain this?
Thanks
Jim

 

The dual/dual or Center Mount Exhaust(CME) is the same on SS/Firehawk. This is SLP's best exhaust. My cutout gave me a whopping negative 2 horsepower on the dyno. Maybe my computer needed to learn it though. I keep it capped now. The cutout is located right before the axle. I would be willing to trade someone my intermediate pipe with the cutout on it for their stock one from a CME(dual/dual).

 

Becareful the stock Firehawk and SS d/d exhaust systems are differnet than the aftermarket slp D/D. We did a comparison between my 'hawk with stock exhaust and another guy that had the aftermarket D/D. We used a mustang dyno and there is a 9 hp difference.

 

1) Thee SS base exhaust and the Firehawk base exhausts are not the same. The dual/dual that was stock on the Hawk was optional on the SS.

2) The aftermarket dual/dual is reportedly a bit louder, probably due to the noise restrictions new cars must meet

3) The cone of silence isn't used any longer. SLP did that a few years back to quiet the exhaust, but you won't find it any longer.