[Z06] is there a 3" exhaust system that will fit a Z?
05-17-2016, 09:06 AM
#1
Melting Slicks
Thread Starter
is there a 3" exhaust system that will fit a Z?
So I was watching this youtube video where they tested a Big Block 454 on an engine stand with 2" headers and: 1) open headers 2) 2.5" exhaust 3) 3" exhaust
Coincidently, that motor put out almost the same hp and tq as my new LS-7. Open headers it made 620 CHP and 550 CTQ with the open headers. With 2.5" it lost 20hp and 30ftlbs!! With the 3" exhaust, it picked back up most of the loss.
So that made me think...Is there a 3" system for our cars??
Coincidently, that motor put out almost the same hp and tq as my new LS-7. Open headers it made 620 CHP and 550 CTQ with the open headers. With 2.5" it lost 20hp and 30ftlbs!! With the 3" exhaust, it picked back up most of the loss.
So that made me think...Is there a 3" system for our cars??
05-17-2016, 10:38 AM
#2
Safety Car
Member Since: Feb 2014
Location: Fort Worth Texas
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2017 Corvette of Year Finalist
2016 C5 of the Year
So I was watching this youtube video where they tested a Big Block 454 on an engine stand with 2" headers and: 1) open headers 2) 2.5" exhaust 3) 3" exhaust
Coincidently, that motor put out almost the same hp and tq as my new LS-7. Open headers it made 620 CHP and 550 CTQ with the open headers. With 2.5" it lost 20hp and 30ftlbs!! With the 3" exhaust, it picked back up most of the loss.
So that made me think...Is there a 3" system for our cars??
Coincidently, that motor put out almost the same hp and tq as my new LS-7. Open headers it made 620 CHP and 550 CTQ with the open headers. With 2.5" it lost 20hp and 30ftlbs!! With the 3" exhaust, it picked back up most of the loss.
So that made me think...Is there a 3" system for our cars??
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jerkyboy (05-17-2016)
05-17-2016, 10:04 PM
#6
Melting Slicks
So I was watching this youtube video where they tested a Big Block 454 on an engine stand with 2" headers and: 1) open headers 2) 2.5" exhaust 3) 3" exhaust
Coincidently, that motor put out almost the same hp and tq as my new LS-7. Open headers it made 620 CHP and 550 CTQ with the open headers. With 2.5" it lost 20hp and 30ftlbs!! With the 3" exhaust, it picked back up most of the loss.
So that made me think...Is there a 3" system for our cars??
Coincidently, that motor put out almost the same hp and tq as my new LS-7. Open headers it made 620 CHP and 550 CTQ with the open headers. With 2.5" it lost 20hp and 30ftlbs!! With the 3" exhaust, it picked back up most of the loss.
So that made me think...Is there a 3" system for our cars??
05-17-2016, 10:17 PM
#8
Le Mans Master
05-18-2016, 10:29 AM
#10
Melting Slicks
Thread Starter
I love my Borla Ataks too! quiet in the car but crazy at full throttle! No drone!!
If that big block on the youtube vid picked up 30 ftlbs and 20 hp, it might make it worth an investment.
I made 550 rwhp SAE on the chassis dyno and 620 hp on the engine dyno. which is 12.5% driveline loss.
If that big block on the youtube vid picked up 30 ftlbs and 20 hp, it might make it worth an investment.
I made 550 rwhp SAE on the chassis dyno and 620 hp on the engine dyno. which is 12.5% driveline loss.
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zdeckich (05-19-2016)
05-18-2016, 08:54 PM
#11
Pro
I watched that show too, its pretty cool and very informative but one thing they didnt mention is that everything is relative to power. Meaning a motor that makes over 600hp will feel the difference in exhaust piping diameter vs. an engine making less power. Thats why that BBC showed a difference of almost ~15hp bewtween a 2.5 and 3" exhaust. On a 400hp motor I think you will see very minimal gains.
Last edited by 2003Evo; 05-18-2016 at 08:55 PM.
05-31-2016, 07:54 AM
#12
Le Mans Master
Member Since: Dec 2005
Location: Port Arthur, Texas 77642
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I watched that show too, its pretty cool and very informative but one thing they didnt mention is that everything is relative to power. Meaning a motor that makes over 600hp will feel the difference in exhaust piping diameter vs. an engine making less power. Thats why that BBC showed a difference of almost ~15hp bewtween a 2.5 and 3" exhaust. On a 400hp motor I think you will see very minimal gains.
https://youtu.be/_PVXvHkr-Vs
https://youtu.be/_PVXvHkr-Vs
You are 100% correct. There are basic exhaust tube sizing "guidelines" based on HP.Like a post above said, dual 3" will have small gains on a 400 HP engine compared to a 600 HP engine.