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Old 09-03-2013, 04:59 PM   #18
Southern Comfort
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Quote:
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, 05:01 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, 05:05 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, 05:50 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, 08:00 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, 08:08 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, 08:42 PM   #24
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Quote:
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, 09:52 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, 09:57 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, 10:23 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, 11:08 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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Old 09-04-2013, 02:46 AM   #29
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Is NPP offered on the 2014 SS Camaro w/ automatic tranny?
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Old 09-04-2013, 06:34 AM   #30
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Is NPP offered on the 2014 SS Camaro w/ automatic tranny?
No, it can not cancel the L99 drone switching to 4 cylinders.
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Old 09-04-2013, 08:59 AM   #31
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Quote:
Originally Posted by Southern Comfort View Post
Can you share your 1k dollar reference?
I have $600 in this not counting the oil change or dyno time.
I'm talking about the exhaust system which I believe the MSRP is around 900 bucks...notwithstanding anybody's haggling ability.
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Old 09-04-2013, 09:54 AM   #32
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Quote:
Originally Posted by Bad70supreme View Post
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.
In all my years of drag racing, I never found that to be the case. We were not that fast (10.8's), but if I took the engine past peak power, the times were never as good. It should be noted that shifting the car at 7200 RPM got you to the end of the 1/4 mile just before the rev limiter kicked in (turbo 400 manual valve body with 4500 RPM stall). If I hit the rev limiter in any gear (7400 RPM) things went very south. Your new cam most certainly may have raised the peak power point, and the NPP may benefit you. When you had the better trap speed, did you also have the best ET?
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Old 09-04-2013, 10:52 AM   #33
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Quote:
Originally Posted by Scott@Bjorn3D View Post
No, it can not cancel the L99 drone switching to 4 cylinders.
Can you elaborate? What do you mean by drone switching? Im aware that the auto uses AFM when on the highway / cruise, but is the quad port exhaust not installed solely due to the sound it makes when in 4 cylinder mode (AFM) or for other reasons?
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Old 09-04-2013, 02:46 PM   #34
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Originally Posted by gajagfan View Post
In all my years of drag racing, I never found that to be the case. We were not that fast (10.8's), but if I took the engine past peak power, the times were never as good. It should be noted that shifting the car at 7200 RPM got you to the end of the 1/4 mile just before the rev limiter kicked in (turbo 400 manual valve body with 4500 RPM stall). If I hit the rev limiter in any gear (7400 RPM) things went very south. Your new cam most certainly may have raised the peak power point, and the NPP may benefit you. When you had the better trap speed, did you also have the best ET?
I agree with you when it comes to Auto's! My th400s and my big blocks actually liked to be short shifted into 2nd gear at 5300, then taken to peak at 5600 into 3rd! This would result in my best ETs and traps, I find it different with this engine and M6. If I shift at peak or short shift 2nd like I use to, the car slows down. I tried a hole bunch of different shifts in this car, 2nd gear seems to like 6,400 mabye more if my trans would allow!! shifting 3rd I rev it to the max, I pick up et and speed. This has been the case even when the car was bone stock, I think the manual trans has allot to do with it. A little more RPMs into the next gear seems to help with not have a converter to fall back on.
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