Cammed engine - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Winslow · 07-23-2010, 08:54 PM

I've been looking at videos of cammed engines and realized that they are LOUD. Is it just the nature of the cams, or are their ways to make it still have the badass sound just not as loud? Does exhaust play into it a lot?

Huck1974 · 07-23-2010, 08:56 PM

the volume is not affected by a cam.

prostock69 · 07-23-2010, 09:03 PM

Cammed cars are louder usually because they (the installers) up the compression, open the exhaust valve earlier or a number of other reasons, during the install. The cam, in and of itself, does not make the engine louder. It's the result of everything you need to do to make the cam work that makes it louder.

From what I learned from my husband, if you go with a smaller lift cam with less duration, you'll have the cammed sound but it won't be nasty loud. I can't answer in any more detail as this is the extent of my knowledge which I learned from listening to my hubby talk about cams for the past 6 mos...lol.

Huck1974 · 07-23-2010, 09:12 PM

Quote:

Originally Posted by prostock69

Cammed cars are louder usually because they (the installers) up the compression, open the exhaust valve earlier or a number of other reasons, during the install. The cam, in and of itself, does not make the engine louder. It's the result of everything you need to do to make the cam work that makes it louder.

I would have to disagree with pretty much everything you just said. You don't need to do anything to a car to put a cam in except possibly valve springs. The loudness before and after will change zero.

Darin Morgan · 07-23-2010, 09:24 PM

Quote:

Originally Posted by Huck1974

I would have to disagree with pretty much everything you just said. You don't need to do anything to a car to put a cam in except possibly valve springs. The loudness before and after will change zero.

My wife (Prostock69) was writing what I was saying to her. Your correct in saying that the cam in and of itself will not make the engine louder. I was trying to convey the fact that the increase in compression that is NEEDED for a longer duration cam and that (along with cam timing) is what makes the engine louder. Seeing as how the LS3 and even more so the L99 have limited valve lift with stock pistons the only way to change the pumping efficiency of the engine is to increase duration and you must increase compression relative to the increase in duration or the engine will be a dog.

Huck1974 · 07-23-2010, 09:32 PM

I'm with you. I still feel that with a moderate cam you will get a bit of sewing machine noise happening at the motor but the sound level from the exhaust will remain as close to stock as detectable by the ear.

I think that is what the poster was asking. We just got a little more detailed than needed.

68vert · 07-23-2010, 10:40 PM

Darin, everytime I see your photo, I think of Edward Norton. (What would Tyler do with a new Camaro...?)

Ivan @ Southwest Speed · 07-23-2010, 11:47 PM

Quote:

Originally Posted by 68vert

Darin, everytime I see your photo, I think of Edward Norton. (What would Tyler do with a new Camaro...?)

That's the ultimate compliment. Halarious, yet very true.

Morgan's reads are always, always, always worth your time.
-Ivan

Darin Morgan · 07-24-2010, 08:38 AM

I get that all the time. You think that picture looks like Ed Norton you should see me in real life! I get my hair real cut short and people look at me like I am the guy from American History X.

The 2010 Sin · 07-24-2010, 11:53 AM

+1 on Darin's Cam description.. I didnt decide to go with a quieter catback because my motor produced the same volume after the camswap. It was just enough to create drone-city. Now im a magnaflow owner :-/

Huck1974 · 07-24-2010, 01:49 PM

I noticed no difference at all. You guys have not heard drone until you have owned a C6 vette. These cars are very quiet in comparison. I guess it just boils down to what you are familiar with.

danhr · 07-24-2010, 02:16 PM

I am going to have to disagree with everyone here, and say cammed cars ARE louder

I just so happen to have a few clips of my car before and after my h/c swap

The compression did not increase with the new heads (due to possible ptv cleareance issues)

Full exhaust:

After heads/cam:

You make your own decision... I think it's louder.

Darin Morgan · 07-24-2010, 09:35 PM

I have a drone at 68-70mph. I have to drive 73mph to get rid of it. The speed limit around here is65mph. I will just tell the cop I cant drive 65!
The drone is bad enough that my 8 year old wears head phones. LOL
I just say, Oh well and keep on driving but after about an hour it gets to you. I am going to invest in some noise reduction mating. A cam and some healthy compression made my car frickin LOUD as hell!

Winslow · 07-25-2010, 10:30 AM

Wouldn't the drone be caused more from the exhaust than the cammed engine itself?

07-23-2010, 08:54 PM	#1
Winslow Drives: Dodge Ram Join Date: Apr 2010 Location: Charlotte Posts: 55	Cammed engine I've been looking at videos of cammed engines and realized that they are LOUD. Is it just the nature of the cams, or are their ways to make it still have the badass sound just not as loud? Does exhaust play into it a lot?

07-23-2010, 09:03 PM	#3
prostock69 Female Muscle Car Nut! Drives: 2010 RS/SS IOM Camaro Join Date: Jul 2009 Location: Mansfield, TX Posts: 1,262 View My Garage	Cammed cars are louder usually because they (the installers) up the compression, open the exhaust valve earlier or a number of other reasons, during the install. The cam, in and of itself, does not make the engine louder. It's the result of everything you need to do to make the cam work that makes it louder. From what I learned from my husband, if you go with a smaller lift cam with less duration, you'll have the cammed sound but it won't be nasty loud. I can't answer in any more detail as this is the extent of my knowledge which I learned from listening to my hubby talk about cams for the past 6 mos...lol. __________________ 2SS/RS Inferno Orange w/ black stripes, black/orange interior, Automatic, w/ sunroof and polished aluminum wheels MODS: Borla "S" Type Exhaust, American Racing Headers 3" Longtubes, New Era Cold Air Intake, HP Tune, Custom Ground Camshaft, Professionally Ported Heads by Darin Morgan, Ported Throttle Body, 3000 Stall Converter, and 160 Degree Thermostat. http://www.rehermorrison.com/; http://www.darinmorgan.com/; http://www.neweraperformance.com/

07-23-2010, 10:40 PM	#7
68vert Drives: 2010 SIM SS/RS, 1968 RS convertible Join Date: Sep 2008 Location: Wilmington, NC Posts: 744 View My Garage	Darin, everytime I see your photo, I think of Edward Norton. (What would Tyler do with a new Camaro...?) __________________ 2010 SIM SS/RS see garage for mods

07-24-2010, 08:38 AM	#9
Darin Morgan Reher Morrison Racing Drives: Inferno Orange SS/RS Join Date: Jul 2009 Location: Arlington TEXAS Posts: 249	I get that all the time. You think that picture looks like Ed Norton you should see me in real life! I get my hair real cut short and people look at me like I am the guy from American History X. __________________ 2010 Camaro SS/RS IOM, 475rwhp 415ft/lbs Cam-232°/245° .612 .612 113LSA. Precision 3500 stall, New Era CAI. Reher Morrison Heads, Manifold and TB. Ferrea H-stems, dual springs, Ti-retainers. American Racing long tubes-Xpipe, High flow CATs, "S"type Borla's. 160F Thermo. VVT ACTIVE! Thanks to New Era Performance! Darin Morgan -Induction R&D-EFI calibration Reher-Morrison Racing Engines http://www.rehermorrison.com/rmSale3.htm Phone 817-467-7171 cell 682-559-0321

07-24-2010, 11:53 AM	#10
The 2010 Sin Dont H8 Me Cuz U Aint Me Drives: 2016 SS Sedan, 2017 Explorer Sport Join Date: Feb 2010 Location: Tulsa, Oklahoma Posts: 2,910	+1 on Darin's Cam description.. I didnt decide to go with a quieter catback because my motor produced the same volume after the camswap. It was just enough to create drone-city. Now im a magnaflow owner :-/ __________________

07-23-2010, 08:56 PM	#2
Huck1974 Account Suspended Drives: 2011 2SS Join Date: Jun 2010 Location: Springfield, Mo Posts: 833	the volume is not affected by a cam.

07-23-2010, 09:32 PM	#6
Huck1974 Account Suspended Drives: 2011 2SS Join Date: Jun 2010 Location: Springfield, Mo Posts: 833	I'm with you. I still feel that with a moderate cam you will get a bit of sewing machine noise happening at the motor but the sound level from the exhaust will remain as close to stock as detectable by the ear. I think that is what the poster was asking. We just got a little more detailed than needed.

07-24-2010, 01:49 PM	#11
Huck1974 Account Suspended Drives: 2011 2SS Join Date: Jun 2010 Location: Springfield, Mo Posts: 833	I noticed no difference at all. You guys have not heard drone until you have owned a C6 vette. These cars are very quiet in comparison. I guess it just boils down to what you are familiar with.

07-24-2010, 02:16 PM	#12
danhr BAMF SS Drives: 2016 Camaro 1SS A8 Join Date: Mar 2010 Location: Ford City, PA Posts: 3,023	I am going to have to disagree with everyone here, and say cammed cars ARE louder I just so happen to have a few clips of my car before and after my h/c swap The compression did not increase with the new heads (due to possible ptv cleareance issues) Full exhaust: After heads/cam: You make your own decision... I think it's louder. __________________ 2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance Stock Longblock 800 SAE rwhp. 9.4 @ 145 mph.

07-24-2010, 09:35 PM	#13
Darin Morgan Reher Morrison Racing Drives: Inferno Orange SS/RS Join Date: Jul 2009 Location: Arlington TEXAS Posts: 249	I have a drone at 68-70mph. I have to drive 73mph to get rid of it. The speed limit around here is65mph. I will just tell the cop I cant drive 65! The drone is bad enough that my 8 year old wears head phones. LOL I just say, Oh well and keep on driving but after about an hour it gets to you. I am going to invest in some noise reduction mating. A cam and some healthy compression made my car frickin LOUD as hell! __________________ 2010 Camaro SS/RS IOM, 475rwhp 415ft/lbs Cam-232°/245° .612 .612 113LSA. Precision 3500 stall, New Era CAI. Reher Morrison Heads, Manifold and TB. Ferrea H-stems, dual springs, Ti-retainers. American Racing long tubes-Xpipe, High flow CATs, "S"type Borla's. 160F Thermo. VVT ACTIVE! Thanks to New Era Performance! Darin Morgan -Induction R&D-EFI calibration Reher-Morrison Racing Engines http://www.rehermorrison.com/rmSale3.htm Phone 817-467-7171 cell 682-559-0321

07-25-2010, 10:30 AM	#14
Winslow Drives: Dodge Ram Join Date: Apr 2010 Location: Charlotte Posts: 55	Wouldn't the drone be caused more from the exhaust than the cammed engine itself?

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