Grand Sport or ZO6, which one sounds better?
02-02-2017, 07:43 PM
#21
Le Mans Master
02-03-2017, 08:55 PM
#22
Z6
.
.
02-04-2017, 09:56 AM
#24
Buy the Z. If you are on the fence you won't be playing the coulda/woulda/shoulda game with yourself if you buy a GS. Lastly, the power is the best part!
02-04-2017, 10:57 AM
#25
Instructor
Had a 2014 Z51, added ARH middie headers, Corsa X pipe and still not as deep sounding as my Z06 (although close). 
Have heard the GS and like most here, Z06 is the winner!
Have heard the GS and like most here, Z06 is the winner!
02-04-2017, 11:12 AM
#26
Le Mans Master
02-04-2017, 11:30 AM
#27
It is very rare to hear any SC whine in the Z06 (I have a 2016). You will have to try to hear it by setting the exhaust to quiet with minimal road noise and then use sudden heavy throttle input. You can hear a little brief whine at the 2.25 mark in this GM promotional video: https://www.youtube.com/watch?v=cE17Nje1w3A
By comparison the turbo whine in my GMC Duramax diesel pickup is often quite audible but not annoyingly so. But the exhaust and road noise (and/or audio system) is going to override SC whine in the Z06.
By comparison the turbo whine in my GMC Duramax diesel pickup is often quite audible but not annoyingly so. But the exhaust and road noise (and/or audio system) is going to override SC whine in the Z06.
02-04-2017, 12:21 PM
#28
It is very rare to hear any SC whine in the Z06 (I have a 2016). You will have to try to hear it by setting the exhaust to quiet with minimal road noise and then use sudden heavy throttle input.
But the exhaust and road noise (and/or audio system) is going to override SC whine in the Z06.
But the exhaust and road noise (and/or audio system) is going to override SC whine in the Z06.
I have not heard the LT4 alongside the LT1, but it would be an interesting comparison.
Unless I am mistaken, the SC alone won't change the sound coming out of the rear of the car.
It's more about differing exhaust systems than anything else.
02-04-2017, 01:09 PM
#30
Race Director
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Jakeman11 (02-06-2017)
02-04-2017, 01:11 PM
#31
Completely agree (I have a 2016 too).
I have not heard the LT4 alongside the LT1, but it would be an interesting comparison.
Unless I am mistaken, the SC alone won't change the sound coming out of the rear of the car.
It's more about differing exhaust systems than anything else.
I have not heard the LT4 alongside the LT1, but it would be an interesting comparison.
Unless I am mistaken, the SC alone won't change the sound coming out of the rear of the car.
It's more about differing exhaust systems than anything else.
https://www.youtube.com/watch?v=ZSsIwTuLglU
02-06-2017, 11:14 AM
#33
Melting Slicks
02-06-2017, 11:32 AM
#34
Race Director
http://www.hotrodders.com/forum/what...und-54146.html
There are a bunch of things that affect sound. On a V-8, firing order changes the way an engine sounds. You can actually hear the difference between a Ford 5.0 and a 350 Chevy.
Camshaft design can affect sound. A longer exhaust duration and a tighter lobe separation make for a louder engine.
Compression ratio affects the sound. Higher compression, equals louder.
Engine size affects sound. If you have two cars with the same everything except size, the larger one will be louder (think Pontiac, Buick, Olds) The smaller engine will also sound crisper. Think big block vs. small block.
Exhaust pipe size changes the sound. Larger pipes make more noise. A 3" system is WAAAYY louder that a 2" system.
Muffler design makes a difference. In talking about mufflers, a larger muffler makes more power and is quieter than a smaller muffler.
A two chambered Flowmaster is louder than a three chamber (50 Series), but the 50 makes more power. A 70 series big bodied three chamber makes more power that the 50 series, but is quieter.
I particularly like Dynomax mufflers. They are a combination of a chambered muffler that also has packing. Their welded mufflers include Race Magnums that I think are pretty loud. Their bread and butter muffler is the Super Turbo. The Super Turbo have a 17" long body and are fairly loud, but they don't have the interior drumming that a Flowmaster has. I run Hemi Super Turbos, which are a big Body Super Turbo. These are 23" long and are quiter and make more power that a Super Turbo. They also make the Ultra Flow mufflers. An Ultra Flow is a Super Turbo with a stainless case.
Many manufacturers make packed chambered mufflers, and Edelbrock even sells a kit to repack their mufflers (what a concept).
Turbo mufflers are usually inexpensive generic stock chambered mufflers that have some sound(but not much tone) because they are short, and have some power because there is not a whole lot of chamber size.
Camshaft design can affect sound. A longer exhaust duration and a tighter lobe separation make for a louder engine.
Compression ratio affects the sound. Higher compression, equals louder.
Engine size affects sound. If you have two cars with the same everything except size, the larger one will be louder (think Pontiac, Buick, Olds) The smaller engine will also sound crisper. Think big block vs. small block.
Exhaust pipe size changes the sound. Larger pipes make more noise. A 3" system is WAAAYY louder that a 2" system.
Muffler design makes a difference. In talking about mufflers, a larger muffler makes more power and is quieter than a smaller muffler.
A two chambered Flowmaster is louder than a three chamber (50 Series), but the 50 makes more power. A 70 series big bodied three chamber makes more power that the 50 series, but is quieter.
I particularly like Dynomax mufflers. They are a combination of a chambered muffler that also has packing. Their welded mufflers include Race Magnums that I think are pretty loud. Their bread and butter muffler is the Super Turbo. The Super Turbo have a 17" long body and are fairly loud, but they don't have the interior drumming that a Flowmaster has. I run Hemi Super Turbos, which are a big Body Super Turbo. These are 23" long and are quiter and make more power that a Super Turbo. They also make the Ultra Flow mufflers. An Ultra Flow is a Super Turbo with a stainless case.
Many manufacturers make packed chambered mufflers, and Edelbrock even sells a kit to repack their mufflers (what a concept).
Turbo mufflers are usually inexpensive generic stock chambered mufflers that have some sound(but not much tone) because they are short, and have some power because there is not a whole lot of chamber size.
02-06-2017, 11:41 AM
#35
Melting Slicks
That may be true on a NA motor. I'm not sure about that theory on a SC motor. Maybe someone else can help educate me on this.
02-06-2017, 11:54 AM
#36
The difference between the 2 engines is the LT4 is pushing more air thru it than the LT1.
It also has a different exhaust system for the same reason.
It's likely these 2 things (and possibly others) would give the LT4 a different timbre.
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NSC5 (02-06-2017)
02-06-2017, 12:28 PM
#37
Melting Slicks
FWIW, I don't think it is either.
The difference between the 2 engines is the LT4 is pushing more air thru it than the LT1.
It also has a different exhaust system for the same reason.
It's likely these 2 things (and possibly others) would give the LT4 a different timbre.
The difference between the 2 engines is the LT4 is pushing more air thru it than the LT1.
It also has a different exhaust system for the same reason.
It's likely these 2 things (and possibly others) would give the LT4 a different timbre.
The LT4 pushing more air thru the system makes logical sense why.
02-06-2017, 04:20 PM
#38
Instructor
Here is a link that describes the differences:
www.gmauthority.com/blog/gm/gm-engines/lt4/
02-06-2017, 05:20 PM
#39
Race Director
Don't know why, but it is very distinguishable. The Z06 has several differences, air intakes/cooling system, pistons, cylinder heads and some other internal engine parts are different. Supercharged v. non-supercharged, etc.
Here is a link that describes the differences:
www.gmauthority.com/blog/gm/gm-engines/lt4/
Here is a link that describes the differences:
www.gmauthority.com/blog/gm/gm-engines/lt4/
02-06-2017, 07:39 PM
#40
Melting Slicks
I recall reading that the Z06 lower compression LT4 engine does not go into 4 cylinder mode nearly as often on A8 Z06s as on the A8 LT1 engine cars due to 'different parameters' of the two engines. I also recall reading that GM decided to eliminate the AFM valves on GS manual transmission cars, since these are more likely to be tracked for high speed track events that have proven to destroy/burn out these valves or otherwise contribute to a high failure rate.
I believe it is the absence of these valves that is a significant factor in the different / louder exhaust note of the Z06, and to a lessor extent, the GS manual transmission C7 Corvette.