Loss of HP? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Youngone · 03-12-2014, 06:53 PM

I know there are probably threads on this, but i couldn't find them. I deleted the muffler on my car and a mechanic told me that in the process i probably lost 20 horsepower. I thought the cats, and resonator would keep enough. Anyways, I'm not an engine specialist or very mechanical savvy, did i make a good or bad decision? and did i actually lose hp? He also said that putting it on the dyno before and after will show that i actually did, but i haven't/didn't do so.

Apex Motorsports · 03-12-2014, 07:04 PM

The only thing you list was about 35lbs of weight.

Scott@Bjorn3D · 03-12-2014, 10:41 PM

Muffler delete you will not loose HP. If you cut out the H-Pipe on LS3 or resonator on L99 and do not X-Pipe it you will loose HP and TRQ due to loss of cylinder scavenging.

Krajkerjac · 03-12-2014, 10:45 PM

Quote:

Originally Posted by Youngone

I know there are probably threads on this, but i couldn't find them. I deleted the muffler on my car and a mechanic told me that in the process i probably lost 20 horsepower. I thought the cats, and resonator would keep enough. Anyways, I'm not an engine specialist or very mechanical savvy, did i make a good or bad decision? and did i actually lose hp? He also said that putting it on the dyno before and after will show that i actually did, but i haven't/didn't do so.

Not a mechanic I'd like working on my cars.....

BubbaSS · 03-12-2014, 10:53 PM

Mechanic is wrong...stock muffler basically goes straight through with a small J pipe for drone. All you really did was increase volume/drone and lose lbs, but no loss of power.

axis · 03-12-2014, 10:53 PM

Quote:

Originally Posted by Youngone

I know there are probably threads on this, but i couldn't find them. I deleted the muffler on my car and a mechanic told me that in the process i probably lost 20 horsepower. I thought the cats, and resonator would keep enough. Anyways, I'm not an engine specialist or very mechanical savvy, did i make a good or bad decision? and did i actually lose hp? He also said that putting it on the dyno before and after will show that i actually did, but i haven't/didn't do so.

He's talking about backpressure, which has been banned from Camaro5.

JCunningham · 03-13-2014, 01:42 AM

ask that mechanic if he thinks you will get that 20hp back with a tb spacer.

sutherlacd27 · 03-13-2014, 10:11 AM

Quote:

Originally Posted by Youngone

I know there are probably threads on this, but i couldn't find them. I deleted the muffler on my car and a mechanic told me that in the process i probably lost 20 horsepower. I thought the cats, and resonator would keep enough. Anyways, I'm not an engine specialist or very mechanical savvy, did i make a good or bad decision? and did i actually lose hp? He also said that putting it on the dyno before and after will show that i actually did, but i haven't/didn't do so.

Don't get work done from that mechanic....

BravoMyles · 03-13-2014, 10:17 AM

My car has a muffler delete (until today, that is) and I didn't notice ANY drop in power when I had it done. I never it properly checked, but from what I could tell from the "seat-of-my-pants" it was just fine. Still broke the tires loose if I wasn't paying attention or any little mix-up like it was nothing.

Pace · 03-13-2014, 10:56 AM

Certain cars this could be an issue...you are fine as stated previously in the above comments.

JANNETTYRACING · 03-13-2014, 10:59 AM

Quote:

Originally Posted by Apex Chase

The only thing you list was about 35lbs of weight.

angryv6 · 03-13-2014, 08:25 PM

Quote:

Originally Posted by axis

He's talking about backpressure, which has been banned from Camaro5.

Ha!

con10der · 03-13-2014, 09:56 PM

Your Mechanic probably makes a living selling Muffler Bearings too!

Trob85 · 03-14-2014, 09:30 AM

Guys an idiot don't go back to him.

03-12-2014, 06:53 PM	#1
Youngone Drives: Supercharged 2013 2SS/RS Join Date: Sep 2013 Location: Mississippi Posts: 231	Loss of HP? I know there are probably threads on this, but i couldn't find them. I deleted the muffler on my car and a mechanic told me that in the process i probably lost 20 horsepower. I thought the cats, and resonator would keep enough. Anyways, I'm not an engine specialist or very mechanical savvy, did i make a good or bad decision? and did i actually lose hp? He also said that putting it on the dyno before and after will show that i actually did, but i haven't/didn't do so.

03-12-2014, 10:53 PM	#5
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	Mechanic is wrong...stock muffler basically goes straight through with a small J pipe for drone. All you really did was increase volume/drone and lose lbs, but no loss of power. __________________ 2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ

03-13-2014, 01:42 AM	#7
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	ask that mechanic if he thinks you will get that 20hp back with a tb spacer. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

03-13-2014, 10:56 AM	#10
Pace Lifestyle = Deathstyle Drives: 11 SIM 2SS/RS Join Date: Mar 2010 Location: Long Island, NY Posts: 686	Certain cars this could be an issue...you are fine as stated previously in the above comments. __________________ 11 2SS/RS

03-13-2014, 09:56 PM	#13
con10der Con10der Drives: 2010 2SS/RS M6 IOM Rally Stripes Join Date: Aug 2012 Location: Carlsbad, New Mexico Posts: 97 View My Garage	Your Mechanic probably makes a living selling Muffler Bearings too! __________________ 2010 2SS/RS M6 IOM w/Rally Stripes. BLK CAI w/ADM,WW Relo,2" Kooks,3" Cats-Mids,Vmax Ported TB,Muff Del,Janetty SCT Tuned,Drill/Slot BLK Hawk rotors,Red Grani Brake Lines,Motul 600,IDEAL Master w/res,Moroso CC,Accel Silver Tips w/TVolt 10.4mm,MGW shift w/Retro hand/ball,ABL Kit,Billet/IOM pedals, ZL1 split,Lloyds SS mats,PC Droid4/MAXX docking,HW Solo2. Pend Install: Launch/Shift Light,BMR Susp/1" Drop/Sways/Track Pack,GM 3.9. Future: Janetty Pumpkin w/PosiTrac,1400HP axl,CF DS,Tick Stage 2 Trans,3 Disc Clutch,4"quad tip,center exit AB w/diff...

03-12-2014, 07:04 PM	#2
Apex Motorsports Drives: 2000 Camaro SS Join Date: Feb 2010 Location: Louisville, Ky. Posts: 25,179	The only thing you list was about 35lbs of weight.

03-12-2014, 10:41 PM	#3
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	Muffler delete you will not loose HP. If you cut out the H-Pipe on LS3 or resonator on L99 and do not X-Pipe it you will loose HP and TRQ due to loss of cylinder scavenging.

03-13-2014, 10:17 AM	#9
BravoMyles Drives: Blue/Black 2017 1SS Join Date: Dec 2013 Location: DFW, Texas Posts: 495 View My Garage	My car has a muffler delete (until today, that is) and I didn't notice ANY drop in power when I had it done. I never it properly checked, but from what I could tell from the "seat-of-my-pants" it was just fine. Still broke the tires loose if I wasn't paying attention or any little mix-up like it was nothing.

03-14-2014, 09:30 AM	#14
Trob85 Svt lol Drives: 2011 ss inferno orange blown Join Date: Jan 2012 Location: Topeka Posts: 2,312	Guys an idiot don't go back to him. __________________ plasti dip is not a mod.......and a cold air intake doesn't make you fast!