shorties with muffler delete? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Birm · 10-20-2011, 09:40 AM

Has anyone ran Shorties with a Muffler Delete and stock cats? Waste of money for the shorties? Sound? Drone? I have a great deal on some DT shorties possibly but already planned on a Muffler Delete....

JDP Tech · 10-20-2011, 10:02 AM

L99 or LS3?
I had an L99 with DT shorties and muffler delete, still had the resonator in place. It sounded great, no drone or ill effects, other than lack of power compared to long tubes and a good exhaust.
If you plan on stepping up to long tubes, I'd probably wait for them, unless you can get the shorties for a really good price.
Long tubes are all around better for performance (somewhere around 15-20hp over shorties), and are louder as well, if that's what you're after. So unless you have to confine yourself within emissions regulations, I'd wait for LTs.

Birm · 10-20-2011, 10:16 AM

No plans for LT's because I dont want to void the warranty, with my 2010 I have literally lived at the shop for repairs over the last 5months or so..so to me the Warranty became invaluable.

The SS I ordered is an LS3.. So shorties with Muffler delete wasnt bad? Any ppower gains?

JDP Tech · 10-20-2011, 10:22 AM

Thats cool. Since mine had the resonator in place, its completely different than an LS3 setup, so I can't accurately comment on the noise.
Shorties will get you a few horsepower. I don't remember off the top what I gained, probably around 5.

Birm · 10-20-2011, 04:12 PM

Thanks for the help

Parag · 10-20-2011, 04:46 PM

shorties have a small change from stock, you would have to pay attention to hear the difference

hrpiii · 10-20-2011, 06:29 PM

you need to go with hi-flo cats if you go with shorties to see a power gain. Its the cats that are the problem.

TrojanRay2418 · 10-20-2011, 08:58 PM

i have a muffler delete. I'm putting high flow cats and leaving the stock headers. just installed CAI. sounds awesome cant wait to install cats n really hear her scream

kmcd · 10-20-2011, 10:26 PM

Lose the resonators too. The cats are plenty restrictive and provide more than enough sound attenuation.

Birm · 10-20-2011, 10:45 PM

Will do, thanks for the help guys.

fee5fofum · 10-21-2011, 12:02 AM

Quote:

Originally Posted by Birm

Has anyone ran Shorties with a Muffler Delete and stock cats? YES ! Waste of money for the shorties? NO ! Sound? Aggressive ! Drone? YES but with time you will get use to it .. I have a great deal on some DT shorties possibly but already planned on a Muffler Delete....

This is what I'm running with :
Muffler Delete / Edelbrock X-Pipe / DT Shorty Headers & CAI (from Cold Air Inductions)..

http://imageshack.us/g/837/cfdd.mp4/

fldrummer · 10-21-2011, 01:39 PM

I used to have that combo. I really couldn't tell a difference in performance from the shorties. However, they do look great and you save quite a few pounds from the heavy stock manifolds. It would be a much better bang-for-the-buck to keep the stock manifolds and get HF cat mid-pipes that keep your O2 sensors in the stock location, saving you from having to do a tune and void your warranty.

10-20-2011, 09:40 AM	#1
Birm Drives: Florida Speed & Power Join Date: Jan 2011 Location: Pinellas Park, FL Posts: 3,185	shorties with muffler delete? Has anyone ran Shorties with a Muffler Delete and stock cats? Waste of money for the shorties? Sound? Drone? I have a great deal on some DT shorties possibly but already planned on a Muffler Delete....

10-20-2011, 10:26 PM	#9
kmcd 1,425 hp / supercharged Drives: (2010 2SS/L99) (1999 Corvette) Join Date: Oct 2009 Location: Austin, TX Posts: 1,104	Lose the resonators too. The cats are plenty restrictive and provide more than enough sound attenuation. __________________ "If it's too loud...well, you know the rest."

10-21-2011, 01:39 PM	#12
fldrummer "Black Ace" Drives: Supercharged 2010 SS, 2016 Golf R Join Date: Aug 2008 Location: Ft. Lauderdale, FL Posts: 1,352	I used to have that combo. I really couldn't tell a difference in performance from the shorties. However, they do look great and you save quite a few pounds from the heavy stock manifolds. It would be a much better bang-for-the-buck to keep the stock manifolds and get HF cat mid-pipes that keep your O2 sensors in the stock location, saving you from having to do a tune and void your warranty. __________________ 2010 2SS/RS M6 "Black Ace" - Delivered 6/4/2009 Mods: Forged 416 LS3, Maggie TVS 2300 SC (~11 psi), custom cam (232/247, .630/.630, 118 LSA), 90-lb. injectors, ZL1 fuel pump & ADM controller, Alky Control meth kit, Monster LT1-SC twin-disk clutch, ZL1 drivetrain conversion w/ DSS 1000-HP axles & 1-pc. driveshaft, CAI Inc. intake w/ ADM scoop, XS Power full exhaust (1 7/8" LT headers with 3" off-road pipes), VMAX CNC-ported TB, LSR adjustable sway bars, LPE rear end-links, BMR 1" drop, BMR polyurethane bushings; UMI trailing arms & toe rods. Built & tuned by Kraftworks. 755 rwhp/708 rwtq

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10-20-2011, 10:02 AM	#2
JDP Tech Drives: 2010 CGM Camaro 2SS/RS 429 LSX/F1X Join Date: Aug 2011 Location: Sandy, UT Posts: 429	L99 or LS3? I had an L99 with DT shorties and muffler delete, still had the resonator in place. It sounded great, no drone or ill effects, other than lack of power compared to long tubes and a good exhaust. If you plan on stepping up to long tubes, I'd probably wait for them, unless you can get the shorties for a really good price. Long tubes are all around better for performance (somewhere around 15-20hp over shorties), and are louder as well, if that's what you're after. So unless you have to confine yourself within emissions regulations, I'd wait for LTs.

10-20-2011, 10:16 AM	#3
Birm Drives: Florida Speed & Power Join Date: Jan 2011 Location: Pinellas Park, FL Posts: 3,185	No plans for LT's because I dont want to void the warranty, with my 2010 I have literally lived at the shop for repairs over the last 5months or so..so to me the Warranty became invaluable. The SS I ordered is an LS3.. So shorties with Muffler delete wasnt bad? Any ppower gains?

10-20-2011, 10:22 AM	#4
JDP Tech Drives: 2010 CGM Camaro 2SS/RS 429 LSX/F1X Join Date: Aug 2011 Location: Sandy, UT Posts: 429	Thats cool. Since mine had the resonator in place, its completely different than an LS3 setup, so I can't accurately comment on the noise. Shorties will get you a few horsepower. I don't remember off the top what I gained, probably around 5.

10-20-2011, 04:12 PM	#5
Birm Drives: Florida Speed & Power Join Date: Jan 2011 Location: Pinellas Park, FL Posts: 3,185	Thanks for the help

10-20-2011, 04:46 PM	#6
Parag Drives: 2010 camaro 2SS LS3 Join Date: Aug 2011 Location: Denver Posts: 1,334	shorties have a small change from stock, you would have to pay attention to hear the difference

10-20-2011, 06:29 PM	#7
hrpiii AKA "Beefcake" Drives: 2023 ZL1 Sharkskin Join Date: Oct 2009 Location: Indy Posts: 8,529	you need to go with hi-flo cats if you go with shorties to see a power gain. Its the cats that are the problem.

10-20-2011, 08:58 PM	#8
TrojanRay2418 Drives: 2010 2ss/rs Join Date: Aug 2011 Location: sylmar ca Posts: 109	i have a muffler delete. I'm putting high flow cats and leaving the stock headers. just installed CAI. sounds awesome cant wait to install cats n really hear her scream

10-20-2011, 10:45 PM	#10
Birm Drives: Florida Speed & Power Join Date: Jan 2011 Location: Pinellas Park, FL Posts: 3,185	Will do, thanks for the help guys.