CAI, headers, cat back and a tune.

[EZurcher]

Read lots of threads on individual mods and various combinations but can't figure this out. What is the expected HP gain range for a CAI, Headers with performance cats, x pipe, and a cat back with a tune. All bolt-ons without any engine work. My guess is around 475 at the back wheels. Anyone have this combination and what were your results?

[speedzalot]

Originally Posted by EZurcher

Read lots of threads on individual mods and various combinations but can't figure this out. What is the expected HP gain range for a CAI, Headers with performance cats, x pipe, and a cat back with a tune. All bolt-ons without any engine work. My guess is around 475 at the back wheels. Anyone have this combination and what were your results?

Probably not even close to that , are you stick or automatic ?

[JerTM]

Yeah, 475 at the wheels is not going to happen.

2011 LS3

Z/28 intake
1 7/8 Stainless Works headers
High flow cats
Corsa catback
Dyno tuned by JDP

415 RWHP, 411 Tq

[Indydriver]

ARH w/HFCs into OE midpipe and NPP
CAI intake
VMax ported TB
<54 lbs wheels and tires

Read all about it here:

http://www.camaro5.com/forums/showthread.php?t=344914

Note: CAI was installed prior to baseline

[EZurcher]

LS3/stick

[EZurcher]

Thanks, that was the info I was looking for. Funny how it doesn't all add up to what you think it is. Lots of money for sure. Will probably stick with axle or cat backs and CAI.

[pyroguy]

I think you're confusing factory rated horsepower vs wheel horsepower. Factory rated is at the crank or engine. Through power train loss you will be less than that at the wheels. You're 475 guess would probably be near crank power for those mods, but definitely not wheel horsepower. If you have a L99 and those mods you're looking somewhere between 360-380 rwhp depending on the dyno. If you have a LS3 you're probably looking 400-420 rwhp, again depending on the dyno.

[PalmerGA]

Originally Posted by EZurcher

Thanks, that was the info I was looking for. Funny how it doesn't all add up to what you think it is. Lots of money for sure. Will probably stick with axle or cat backs and CAI.

Well, you're talking "to the wheels" HP. Realize your car may be rate at 426 HP "at the flywheel", but that probably equates to 385-390 "to the wheels". If the mods you suggest convert to 435 "at the wheels", I'd be surprised.

[0331Marine]

Heck, I'll be happy with 415 and I have all those mods lol

I'll dyno mine someday.

[GotGame55]

You should add the Night Fury Cam if you wanna get 450hp+ But that engine work tho.

[Indydriver]

Originally Posted by EZurcher

Thanks, that was the info I was looking for. Funny how it doesn't all add up to what you think it is. Lots of money for sure. Will probably stick with axle or cat backs and CAI.

Please don't make the common mistake of modifying the exhaust from the rear. Headers are the building block of all power pickups in the LS3. I will tell you that the additional power, tremendous improvement in throttle response and sweet sound I've created are well worth it. I had no prior experience modifying a Chevy V8--all was learned here, and it works, unfailingly. Listen, learn, act.

[Cyber10]

Originally Posted by pyroguy

I think you're confusing factory rated horsepower vs wheel horsepower. Factory rated is at the crank or engine. Through power train loss you will be less than that at the wheels. You're 475 guess would probably be near crank power for those mods, but definitely not wheel horsepower. If you have a L99 and those mods you're looking somewhere between 360-380 rwhp depending on the dyno. If you have a LS3 you're probably looking 400-420 rwhp, again depending on the dyno.

This, I'm making just under 500 at the wheels right now(L99) and I have a lot more mods than what you've listed, most of which is engine work and not simple bolt ons.