Straight pipe is MORE than a sound mod - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BradoSanz · 11-28-2017, 01:46 PM

After having multiple car owners tell me I am wrong, I am here to argue that straight pipes are not just a sound mod when done correctly. I have a tuned 2011 Camaro SS with full bolt ons, aggressive cam and custom 93 octane tune. With the stock exhaust I was getting walked by a 2015 C7 Stingray (xpipe and intake) below 100mph, by the end of our run he was 1.5 car lengths ahead or so. After I got my straight pipes installed, I pull the C7 quite hard even below 100 (it is worth noting that he catches up to me once I hit fourth gear, we have yet to see if he will pull me after 120mph or we become deadlocked). Both runs were done in similar conditions and temperatures, without wheelspin from either car in all runs. I didn't dyno for official numbers, but that right there tells me that the HP gains I made from these straight pipes were quite significant (30-40hp) since my car is setup correctly and tuned for straight pipes. Discuss.

JerTM · 11-28-2017, 02:34 PM

Well, without a dyno to prove your point it's still just anecdotal. I certainly would love to see a simple straight pipe gain that much, but it's just not possible. I wouldn't have put a cam in if it was that easy for so much power.

Edit, what is your definition of "straight pipe"? Long tube headers without cats or muffler? Stock manifold with no cats? Stock manifold, cats, no mufflers?

Outlaw77 · 11-28-2017, 02:34 PM

You mean straight pipes that replace the rear mufflers?

Hixson · 11-28-2017, 02:39 PM

I think people say that replacing the stock catback with a straight piped aftermarket catback can be expected to gain something 5-10 HP (10 being generous).

To get the 35-40 HP youre talking about you would need to do something like headers and a tune. I would guess that straight pipes and a tune could be good for something like 20? I'm just guessing but I thought a lot of the HP gain of Headers + tune came from the headers.

Is it possible you smoked this vette this time because hes driving a manual and just stinks on that run?

STALKER · 11-28-2017, 02:47 PM

I would love for this to be true (getting that much from straight pipes), but unfortunately I just don't think this is even close to possible. Sounds like the Vette might have pooped the bed on your recent run. In any event though, knocking off a C7 with a Gen 5 is nothing to shake a stick at....the weight difference alone kills us. Good win.

splashlog48 · 11-28-2017, 02:49 PM

LMMFAO !!!!

christianchevell · 11-28-2017, 06:51 PM

You may have removed some restriction from what ever your old set up was but not so much a gain in power as one pull compared to one other proves little....

0331Marine · 11-28-2017, 07:40 PM

There's a test on YouTube. Back to back x-pipe had more power.

InFiD3ViL · 11-28-2017, 07:43 PM

I wish he would elaborate on what he means by 'straight pipe'.

When someone says that, I tend to think of long tube headers, without cats, and NO H/X pipe. A true dual setup.

But from what I understand, our cars tend to run like garbage without some sort of crossover.

Gunmetal Speedster · 11-28-2017, 07:49 PM

Quote:

Originally Posted by JerTM

Well, without a dyno to prove your point it's still just anecdotal. I certainly would love to see a simple straight pipe gain that much, but it's just not possible. I wouldn't have put a cam in if it was that easy for so much power.

Edit, what is your definition of "straight pipe"? Long tube headers without cats or muffler? Stock manifold with no cats? Stock manifold, cats, no mufflers?

SquawkVFR · 11-28-2017, 08:00 PM

Maybe it sounded like it had more horsepower.

pyroguy · 11-28-2017, 08:40 PM

They say 100 pounds off a car is good for a 0.1 of a second shaved off of your quarter mile E.T. Have you ever weighed the suitcase mufflers? They're way heavier than a muffler setup should be. What you may be experiencing is the loss of 50+ pounds of weight off of your car with the combined volume increase thus making it seem as though your car gained "30-40 hp".

Bo White · 11-28-2017, 08:55 PM

I gained nothing on the dyno with my cutouts open.

rontammy0 · 11-28-2017, 09:37 PM

You will gain zero from a catback or a muffler delete mod.

11-28-2017, 01:46 PM	#1
BradoSanz Drives: 2011 modded Camaro SS Join Date: Sep 2017 Location: South Texas Posts: 31	Straight pipe is MORE than a sound mod After having multiple car owners tell me I am wrong, I am here to argue that straight pipes are not just a sound mod when done correctly. I have a tuned 2011 Camaro SS with full bolt ons, aggressive cam and custom 93 octane tune. With the stock exhaust I was getting walked by a 2015 C7 Stingray (xpipe and intake) below 100mph, by the end of our run he was 1.5 car lengths ahead or so. After I got my straight pipes installed, I pull the C7 quite hard even below 100 (it is worth noting that he catches up to me once I hit fourth gear, we have yet to see if he will pull me after 120mph or we become deadlocked). Both runs were done in similar conditions and temperatures, without wheelspin from either car in all runs. I didn't dyno for official numbers, but that right there tells me that the HP gains I made from these straight pipes were quite significant (30-40hp) since my car is setup correctly and tuned for straight pipes. Discuss. Last edited by BradoSanz; 11-29-2017 at 03:57 AM.

11-28-2017, 02:47 PM	#5
STALKER Drives: 2023 Camaro ZL1 1LE Join Date: Feb 2016 Location: Middletown, DE Posts: 340	I would love for this to be true (getting that much from straight pipes), but unfortunately I just don't think this is even close to possible. Sounds like the Vette might have pooped the bed on your recent run. In any event though, knocking off a C7 with a Gen 5 is nothing to shake a stick at....the weight difference alone kills us. Good win. __________________ 2014 Camaro SS Spring Edition LSX440ci LSX Block, MAST 305 Black Labels, Exceldyne Valves, Diamond Pistons, Callies Crank & Rods, Cam Motion Cam, Johnson 2116LSR Lifters, Comp XDA Pushrods, Jesel Rockers, Mamo MSD, NW 102, Roto-Fab CAI, FAST 65# Injectors, ZL1 Fuel Pump, Kooks 2" Headers, Corsa Sport 3" Catback, Z28 Shifter, ZR1 Clutch, Katech LW Flywheel, 1LE 3.91 Diff, LPW Diff Cover, BMR - 1.4" Springs, LCA's, Trailing Arms, Toe Rods, Sway Bars, End Links, Diff Bushings, and Tunnel Brace, Z28/1LE Strut Tower Brace, Improved Racing Oil Cooler 2023 Camaro ZL1 / 1LE Stock

11-28-2017, 02:49 PM	#6
splashlog48 Drives: 2011 Green SS M6 Join Date: Jun 2015 Location: CleveBurbs Ohio Posts: 669	LMMFAO !!!! __________________ Edelbrock EForce Blower, RDP custom grind cam with upgrades,Stainless Power Headers with HighFlow Cats, Stainless Power Retro catback, DSS halfshafts, CAI brand CAI, Tuned ON the Dyno by Steve at RDP. SLP rims,All vinyl stripes removed and painted on, custom hand painted pinstriping, Custom leather seats, Lloyds mats,windows tinted, Sparks emblems, Hurst Billit shifter, and too many small items to list. VDI Scissors doors.

11-28-2017, 06:51 PM	#7
christianchevell old school chevy rodder Drives: 2021 zl1 a-10 WildCherry Join Date: Jul 2012 Location: Oregon Posts: 5,622 View My Garage	You may have removed some restriction from what ever your old set up was but not so much a gain in power as one pull compared to one other proves little.... __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, BMR susp, Speed covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, TSP Longtubes & cats, LPE, 1le mods, ,LME cover, Katech pump and chain, Trunnions, BTR stage 2, LPE boostapump, Gforce, Speed eng , Granetteli, etc etc

11-28-2017, 07:43 PM	#9
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,737	I wish he would elaborate on what he means by 'straight pipe'. When someone says that, I tend to think of long tube headers, without cats, and NO H/X pipe. A true dual setup. But from what I understand, our cars tend to run like garbage without some sort of crossover. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

11-28-2017, 02:34 PM	#2
JerTM Drives: 2011 2SS/RS M6 Join Date: Oct 2015 Location: Utah Posts: 1,940	Well, without a dyno to prove your point it's still just anecdotal. I certainly would love to see a simple straight pipe gain that much, but it's just not possible. I wouldn't have put a cam in if it was that easy for so much power. Edit, what is your definition of "straight pipe"? Long tube headers without cats or muffler? Stock manifold with no cats? Stock manifold, cats, no mufflers?

11-28-2017, 02:34 PM	#3
Outlaw77 Drives: 2018 Charger SRT 392 F8 Green Join Date: Aug 2010 Location: Oakville Ontario, Canada Posts: 1,910	You mean straight pipes that replace the rear mufflers?

11-28-2017, 02:39 PM	#4
Hixson Drives: 2015 Camaro 1SS L99 Join Date: Apr 2016 Location: Quad Cities, Iowa Posts: 623 View My Garage	I think people say that replacing the stock catback with a straight piped aftermarket catback can be expected to gain something 5-10 HP (10 being generous). To get the 35-40 HP youre talking about you would need to do something like headers and a tune. I would guess that straight pipes and a tune could be good for something like 20? I'm just guessing but I thought a lot of the HP gain of Headers + tune came from the headers. Is it possible you smoked this vette this time because hes driving a manual and just stinks on that run?

11-28-2017, 07:40 PM	#8
0331Marine Drives: 2012 SS/RS MN6 Join Date: Mar 2016 Location: Covington Ga Posts: 783	There's a test on YouTube. Back to back x-pipe had more power.

11-28-2017, 08:00 PM	#11
SquawkVFR Account Suspended Drives: 2010 Camaro Join Date: May 2014 Location: Alabama Posts: 1,971	Maybe it sounded like it had more horsepower.

11-28-2017, 08:40 PM	#12
pyroguy Started#gottalovethatblue Drives: ABM #832 Join Date: Apr 2013 Location: GA Posts: 7,088 View My Garage	They say 100 pounds off a car is good for a 0.1 of a second shaved off of your quarter mile E.T. Have you ever weighed the suitcase mufflers? They're way heavier than a muffler setup should be. What you may be experiencing is the loss of 50+ pounds of weight off of your car with the combined volume increase thus making it seem as though your car gained "30-40 hp". __________________ '10 Camaro 2SS/RS \| Aqua Blue #832 of 3,903 \| Silver Stripes Check out my build thread

11-28-2017, 08:55 PM	#13
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,091	I gained nothing on the dyno with my cutouts open. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter, stage 4 cam and Wilkes 11° 65cc heads Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

11-28-2017, 09:37 PM	#14
rontammy0 Account Suspended Drives: 2011 2SS/ RS INFERNO ORANGE L99 Join Date: Dec 2012 Location: Alliston Ontario Canada Posts: 9,057 View My Garage	You will gain zero from a catback or a muffler delete mod.