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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 07-01-2013, 04:06 PM   #201
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Originally Posted by Goo View Post
there is a dyno on their site and it states it is a LS3...
it states its for an LSA (ZL1)

LSA block is = LS3 block for headers purposes.
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Old 07-01-2013, 04:27 PM   #202
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There are LSA or ZL1 Camaro motor Dyno graphs then there are LS3 Corvette Dyno graphs. I believe they have had the LS3 from a Vette Dyno up initially it will be similar results but not identical.

I'm almost guessing that the Corvette would show less improvement than a Camaro SS because it traditionally has a better exhaust. Although the gap in power has changed over the years. So this is just my theory. I'm probably totally off base.
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Old 07-01-2013, 09:51 PM   #203
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Old 07-02-2013, 07:20 AM   #204
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I thought the cam in the our Camaro LS3 had a slightly different profile than the cam in the Corvette LS3.
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Old 07-02-2013, 11:16 AM   #205
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So on an A6 with a muffler delete would these headers be to loud? I still have the mid section resonator but was thinking about going with an x-pipe there. I wonder if that would put it over the edge into the obnoxiously loud category?

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Old 07-02-2013, 11:45 AM   #206
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Quote:
Originally Posted by ABM Camaro View Post
I thought the cam in the our Camaro LS3 had a slightly different profile than the cam in the Corvette LS3.
All LS3 cams are 204/211 .551/.525 @117.

The Tech info from GM:

MY08 LS3 14.01
mm
.551 in
267° 204° 7°
BTDC
80°
ABDC
19°
ATDC
43
ABDC
120°
ATDC
1936.9
mm/deg.
4%


Quote:
Originally Posted by Marc ss View Post
So on an A6 with a muffler delete would these headers be to loud? I still have the mid section resonator but was thinking about going with an x-pipe there. I wonder if that would put it over the edge into the obnoxiously loud category?

Marc
Yeah, any LS3 or L99 with a Muffler Delete is going to get loud/old really quick.

Put a (Magnaflow Resonated) X Pipe in there, go with a nice axleback and let these rip.

They'll be plenty loud enough for you even at that point.

Good luck and let us know if we can help!
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Old 07-02-2013, 12:55 PM   #207
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Good info Ivan!
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Old 07-02-2013, 03:02 PM   #208
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Quote:
Originally Posted by Marc ss View Post
So on an A6 with a muffler delete would these headers be to loud? I still have the mid section resonator but was thinking about going with an x-pipe there. I wonder if that would put it over the edge into the obnoxiously loud category?

Marc
I myself would like to hear this sound, as I do not believe it exists (as far as our exhausts go).

If you can't scare small children with a rev, it's not loud enough! IMO of course!
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Old 07-02-2013, 05:20 PM   #209
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Aren't a lot of the axle back mufflers pretty much the same as a muffler delete?
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Old 07-02-2013, 06:03 PM   #210
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Muffler Deletes are just that....no mufflers.

Most Axlebacks come with mufflers.

Hopefully that helps clear it up.
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Old 07-03-2013, 02:37 PM   #211
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So what's the RWHP gain on an LS3 with no tune? Is that information available yet?
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Old 07-03-2013, 02:50 PM   #212
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So what's the RWHP gain on an LS3 with no tune? Is that information available yet?
These are just now hitting the market. To my knowledge, there isn't any independent info at all.
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Old 07-03-2013, 03:40 PM   #213
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Interesting article here with expert header designer Jack Burns discussing the benefits of Tri Y headers:

http://www.popularhotrodding.com/tec...d_header_tech/

If you don't want to read the whole article, this is it in a nutshell:
"Jack told us: "For just about everyone running an American V-8 on the street, the Tri-Y design is almost always optimal for overall power production."
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Old 07-03-2013, 04:16 PM   #214
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Quote:
Originally Posted by Cuda7050 View Post
Interesting article here with expert header designer Jack Burns discussing the benefits of Tri Y headers:

http://www.popularhotrodding.com/tec...d_header_tech/

If you don't want to read the whole article, this is it in a nutshell:

"Jack told us: "For just about everyone running an American V-8 on the street, the Tri-Y design is almost always optimal for overall power production."
Wow such a great article! It seems the tri y setup is a great start for those looking to tune their LS3 or any V8 more precisely...I'm sold lol
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Old 07-03-2013, 04:19 PM   #215
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Wow such a great article! It seems the tri y setup is a great start for those looking to tune their LS3 or any V8 more precisely...I'm sold lol
There is a reason why the new LS7 boasts a Tri-Y design from GM!

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Old 07-03-2013, 04:26 PM   #216
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Just ordered a set of these with cats.... gonna be a little wait for them but once they are installed I should have a great before and after independent dyno comparison for everyone.

I just had my car dyno'd about 2 weeks ago and these headers will be my only modification since those pulls, so it should be a relatively clear indicator of the impact of the new headers. Probably about a month out (1 or 2 weeks for the headers to get here, probably another week or two before I can get them installed).
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Old 07-03-2013, 05:27 PM   #217
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Just ordered a set of these with cats.... gonna be a little wait for them but once they are installed I should have a great before and after independent dyno comparison for everyone.

I just had my car dyno'd about 2 weeks ago and these headers will be my only modification since those pulls, so it should be a relatively clear indicator of the impact of the new headers. Probably about a month out (1 or 2 weeks for the headers to get here, probably another week or two before I can get them installed).
Will be nice to see what they do to a stock car but many would love to see a comparison between these and other LT's.
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Old 07-03-2013, 06:56 PM   #218
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Will be nice to see what they do to a stock car but many would love to see a comparison between these and other LT's.
Well.... I'm not completely stock either, but I guess my point was I'll have another independent baseline to compare against the installed headers.
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Old 07-04-2013, 01:11 AM   #219
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Well.... I'm not completely stock either, but I guess my point was I'll have another independent baseline to compare against the installed headers.
Absolutely. The more data the better.
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Old 07-05-2013, 02:55 PM   #220
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Questions:

Why the third O2 sensor hole north of the cat? Is that for use without the cat and plugged otherwise?

Also these look long. Will they require cutting the Camaro NPP exhaust?

Looking forward to interesting dynos and track improvements (the real test!).
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Old 07-05-2013, 06:53 PM   #221
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The front O2 port is for a wideband sensor. It would be capped when not in use.

I can't confirm for sure but they say they are drop in. I hope there are no problems with NPP because that's what I have.

I'd like the Pfadt guys to confirm the NPP question.
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Old 07-05-2013, 07:10 PM   #222
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The headers require no cutting and they do fit right in. The only sets available now come with connection pipes from the headers to your factory mid-pipes. Once there is a X-Pipe available, like all of the other brands, you would have to cut for an X-Pipe since there are no junctions in the rear where the X pipes would land.

So, for these you will not have to cut ANYTHING up to fit on. We're putting them on a ZL1 in a week or so, and putting them on a SS next week so we plan to take plenty of pictures!
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Old 07-05-2013, 07:11 PM   #223
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Quote:
Originally Posted by Fraxum View Post
Questions:

Why the third O2 sensor hole north of the cat? Is that for use without the cat and plugged otherwise?

Also these look long. Will they require cutting the Camaro NPP exhaust?

Looking forward to interesting dynos and track improvements (the real test!).
Quote:
Originally Posted by Firefighter View Post
The front O2 port is for a wideband sensor. It would be capped when not in use.

I can't confirm for sure but they say they are drop in. I hope there are no problems with NPP because that's what I have.

I'd like the Pfadt guys to confirm the NPP question.
They will bolt right up to the factory exhaust, whether that be the regular or NPP catback.

Best regards,

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Old 07-05-2013, 07:17 PM   #224
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They will bolt right up to the factory exhaust, whether that be the regular or NPP catback.

Best regards,

Tyler
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Tyler would know considering they have already seen these in person.
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Old 07-05-2013, 07:22 PM   #225
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So are you guys (JDP, FSP, Apex) all selling these at the same price with free shipping that Pfadt direct is?

I'm planning on ordering these by the 7th just want to know if I should go direct or give the business to one of the vendors.
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