How much HP 2.5 exhaust? - Page 6 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

camaro500 · 11-06-2013, 09:14 AM

My 3 inch cat back was a billy boat and it weighed a ton. I would not suggest it to anybody. Fit was terrible and it was heavier than stock. The 5-6 feet of stock mid pipe(factory L99 H-pipe) left on my car that goes from my dynatech cats to 13 inches before first set of exhaust hangers (at diff) is actually pretty light. The competition 2.5 inch maganflow weighs very little because it is straight pipe. I was at Jannetty Racing in august and he told me that dyno proven... the stock exhaust flows so well that a 3 inch cat back nets a couple of CRANK hp at most on N/A applications. Def not a bang for your buck mod. Trust me I feel completely stupid having spent $1400 on my cat when I could have saved nearly 1000$ and put it towards a Cam like NIGHT FURY! thats bang for your buck awesomeness.

axis · 11-06-2013, 12:44 PM

Quote:

Originally Posted by camaro500

My 3 inch cat back was a billy boat and it weighed a ton. I would not suggest it to anybody. Fit was terrible and it was heavier than stock. The 5-6 feet of stock mid pipe(factory L99 H-pipe) left on my car that goes from my dynatech cats to 13 inches before first set of exhaust hangers (at diff) is actually pretty light. The competition 2.5 inch maganflow weighs very little because it is straight pipe. I was at Jannetty Racing in august and he told me that dyno proven... the stock exhaust flows so well that a 3 inch cat back nets a couple of CRANK hp at most on N/A applications. Def not a bang for your buck mod. Trust me I feel completely stupid having spent $1400 on my cat when I could have saved nearly 1000$ and put it towards a Cam like NIGHT FURY! thats bang for your buck awesomeness.

We're talking 600+whp supercharged engines though.

Bo White · 11-06-2013, 12:51 PM

I'm leaving for the dyno now. Post up in a few hours.

camaro500 · 11-06-2013, 01:28 PM

Quote:

Originally Posted by axis

We're talking 600+whp supercharged engines though.

OOOPS MY BAD

Bo White · 11-06-2013, 02:43 PM

Last time I was here it made 569.7 it made 588.8 first pull cold. I'll post later on some average runs.

grocerygetter · 11-06-2013, 02:50 PM

Bo...temp/DA differences? if so, MAF gains before after?

Bo White · 11-06-2013, 02:58 PM

Dang it......give me a sec.....lol

grocerygetter · 11-06-2013, 03:11 PM

you know this is all selfish of me, right? Trying to justify the cost of a header/dual 3" set up gamble.

Bo White · 11-06-2013, 03:18 PM

Second pull 587.9

S3XPanther · 11-06-2013, 04:07 PM

Wow, almost 20rwhp just by switching to a 3in. Are the temps similar between the two visits?

BlaqWhole · 11-06-2013, 04:11 PM

This says a lot...even if Bo has forced induction. Can't wait till I get some boost under the hood!!

Iam Broke · 11-06-2013, 05:09 PM

3.2% gain on the second pull. Too bad we don't know the da on both days.

Bo White · 11-06-2013, 06:49 PM

I had to leave early to pick up the kids(plan changed on arrangements while I was there). These are SAE #s so they are close to correct. The conditions this trip was 75.5* 29.34" and 45% humidity so I'll have to look on my old sheet to see what they were but memory tells me it was about the same.

Bo White · 11-06-2013, 06:52 PM

So first pull was 588.8 and second pull was 587.9

11-06-2013, 09:14 AM	#71
camaro500 Drives: 2017 Jaguar F Type R Tuned 498awhp Join Date: Apr 2013 Location: Canada Posts: 871 View My Garage	My 3 inch cat back was a billy boat and it weighed a ton. I would not suggest it to anybody. Fit was terrible and it was heavier than stock. The 5-6 feet of stock mid pipe(factory L99 H-pipe) left on my car that goes from my dynatech cats to 13 inches before first set of exhaust hangers (at diff) is actually pretty light. The competition 2.5 inch maganflow weighs very little because it is straight pipe. I was at Jannetty Racing in august and he told me that dyno proven... the stock exhaust flows so well that a 3 inch cat back nets a couple of CRANK hp at most on N/A applications. Def not a bang for your buck mod. Trust me I feel completely stupid having spent $1400 on my cat when I could have saved nearly 1000$ and put it towards a Cam like NIGHT FURY! thats bang for your buck awesomeness. __________________ JRE cammed w.full bolt ons 444rwhp/422rwtq SOLD 2017 Jaguar F Type R ''Life moves pretty fast. If you don't stop and look around once in a while, you could miss it.'' - F. Bueller

11-06-2013, 12:51 PM	#73
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	I'm leaving for the dyno now. Post up in a few hours. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter 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

11-06-2013, 02:43 PM	#75
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Last time I was here it made 569.7 it made 588.8 first pull cold. I'll post later on some average runs. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter 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

11-06-2013, 02:50 PM	#76
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	Bo...temp/DA differences? if so, MAF gains before after? __________________ -John S.

11-06-2013, 02:58 PM	#77
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Dang it......give me a sec.....lol __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter 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

11-06-2013, 03:11 PM	#78
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	you know this is all selfish of me, right? Trying to justify the cost of a header/dual 3" set up gamble. __________________ -John S.

11-06-2013, 03:18 PM	#79
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Second pull 587.9 __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter 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

11-06-2013, 04:07 PM	#80
S3XPanther by Odeon Drives: '12 SS/RS A6 IOM SOLD, '13 1LE IOM Join Date: Nov 2011 Location: Good question Posts: 1,707	Wow, almost 20rwhp just by switching to a 3in. Are the temps similar between the two visits? __________________ "It works 60% of the time, every time." "Some say it's a waste of time, others say it's an incredible waste of time." "The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy." 2013 IOM SS/RS - 1LE. Born 5/6/2013 (1 of 32 1SS IOM 1LE's)

11-06-2013, 04:11 PM	#81
BlaqWhole Account Suspended Drives: 2017 Camaro ZL1 A10 Join Date: May 2012 Location: NJ Posts: 7,692	This says a lot...even if Bo has forced induction. Can't wait till I get some boost under the hood!!

11-06-2013, 05:09 PM	#82
Iam Broke PHAT B33 Drives: 2012 TF3 Camaro 2SS/RS M6 Join Date: Jun 2012 Location: Dark of the Moon Posts: 1,460 View My Garage	3.2% gain on the second pull. Too bad we don't know the da on both days. __________________ Another 1 of 371 '12 T3 LS3 M6's built. Last edited by Iam Broke; 11-06-2013 at 05:24 PM.

11-06-2013, 06:49 PM	#83
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	I had to leave early to pick up the kids(plan changed on arrangements while I was there). These are SAE #s so they are close to correct. The conditions this trip was 75.5* 29.34" and 45% humidity so I'll have to look on my old sheet to see what they were but memory tells me it was about the same. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter 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

11-06-2013, 06:52 PM	#84
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	So first pull was 588.8 and second pull was 587.9 __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter 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