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Old 09-03-2013, 03:28 PM   #15
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Quote:
Originally Posted by Camaro_Corvette View Post
I guess that's better than what you have said in the past. Glad we can finally put this to rest. Every little bit counts...

Seems like it adds 9 to me....
Adding 9 hp past the peak HP and shift point is like pissing in a dark suit....no one really notices. I still feel that is you are not buying it for the sound, its not a good value at all. I have not changed my opinion, just maybe stated it in a more politically correct way! To each his own.
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Old 09-03-2013, 03:56 PM   #16
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Quote:
Originally Posted by gajagfan View Post
Adding 9 hp past the peak HP and shift point is like pissing in a dark suit....no one really notices. I still feel that is you are not buying it for the sound, its not a good value at all. I have not changed my opinion, just maybe stated it in a more politically correct way! To each his own.
Nobody expected it to add 60 HP.
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Old 09-03-2013, 03:57 PM   #17
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Originally Posted by gajagfan View Post
When you say sucks, are you referring to performance with stock HP, performance with modified HP, or sound?
When I say it sucks I mean it sucks! The sound sucks, there is none! It performs on a stock or lightly modded car fine but that's about it. What else is there to say about it.
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Old 09-03-2013, 03:59 PM   #18
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Originally Posted by Anaconda View Post
Did you get a chance to weigh it? Not sure if anyone has made a concrete difference in weight between the stock exhaust vs NPP. Just curious.
I see 6 lbs total lighter than stock.
That is the parts I took off weigh 6 more than what I put in.
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Old 09-03-2013, 04:01 PM   #19
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I purchased my NPP so I am able to control the noise level inside the cabin with a switch.....I also like the look of the 4 tips vs 2

-Matt
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Old 09-03-2013, 04:05 PM   #20
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Originally Posted by PYROLYSIS View Post
Nobody expected it to add 60 HP.
Never said they did. My point is HP past the point you should shift the car at for max performance is not of much value. It was not a comment on quantity.
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Old 09-03-2013, 04:50 PM   #21
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That's not past the shift point, you don't shift at peak you shift a few hundred past it. So that would be valuable to have that extra 10hp at the wheels in my eyes, my car peaks at 6400 but likes to be shifted at 6700 into 3rd for best trap speed! Before my cam I ran it right up to the rev limiter for my best times.
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Old 09-03-2013, 07:00 PM   #22
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Changing the oil can have an effect on power output. You should have left it in there. Older oil will be slightly thinner and rob slightly less power versus fresh oil.
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Old 09-03-2013, 07:08 PM   #23
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Thanks OP for posting. Interesting findings and makes my decision to order NPP for our 1LE a little more challenging.
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Old 09-03-2013, 07:42 PM   #24
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Originally Posted by joelster View Post
Changing the oil can have an effect on power output. You should have left it in there. Older oil will be slightly thinner and rob slightly less power versus fresh oil.
Yes Sir - I agree, and posted it in the spirit of full disclosure.
But I wouldn't expect factory oil with 1300 miles would be significantly different from fresh oil with 50 miles. Assuming it were thinner, I would expect the new oil run to be lower power across the board, maybe worse at higher RPM.

Quote:
Originally Posted by jksynergy View Post
Thanks OP for posting. Interesting findings and makes my decision to order NPP for our 1LE a little more challenging.
Unless you change the manifolds and cats I wouldn't expect much of power difference within the normal operating ranges. I wanted the NPP style and was pleasantly surprised with the NPP sound.
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Old 09-03-2013, 08:52 PM   #25
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I still dont understand the complains about the NPP; installed from factory, cheap, better looking, warranty, free flowing that can support huge HP, great sound and lighter. Show me what other catback adds for HP versus for the price. Go ahead, buy a damn 1300$ catback and stop complaining.

My NPP sounds wicked with high flow cats(2x louder!!). With headers, it would sound absolutly crazy and loud, but I would have the ability to control the sound. I mean its a win win.

Great post OP, congrats! The NPP does have a very unique sound and it will hold a great value, like the old SLP dual dual in the 4th Gen.
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Old 09-03-2013, 08:57 PM   #26
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Quote:
Originally Posted by Dropspeed View Post
I purchased my NPP so I am able to control the noise level inside the cabin with a switch.....I also like the lok of the 4 tips vs 2

-Matt
+1

Reasons to like NPP especially on the 1LE:
  • It's a little lighter.
  • It adds a little bit of power.
  • You can control the exhaust noise with your garage door opener or just a fuse pull.
  • Quad tips.
  • It looks better without the big stock cans.
  • When you start your car up people look at your car. (If you like that.)
  • It sounds way better!!!!
NPP FTW!

To me much more worth it than RS.

Thank you OP for putting numbers on this debate.
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Old 09-03-2013, 09:23 PM   #27
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Interesting. Wonder if weather the same on second run more of a difference would be seen, or just good old dyno differences on a different day.Also people on this site say catbacks make no hp over stock and this one cant be better then those, so maybe some power also from catbacks other then peak? Seen axelback graphs do the same , power before and after peak but little at peak. All food for thought
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Old 09-03-2013, 10:08 PM   #28
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NPP seems great to me. It adds power,which I always knew it would but I don't understand why Chevy has not taken the time to quote the actual hp of a Camaro with NPP and also why why they haven't factored in the hp gain from the electric steering. It's pretty clear to me that a 2013-2014 SS w/ NPP probably has 441 hp or more at the crank. 10 or so for NPp and 5 for the electric steering.
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