car doesnt sound cammed even though its a large cam
03-26-2012, 10:04 PM
#21
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the idle needs to be a little lower and headers. the stock manis hold enough back pressure in the cylinders to make it fire correctly at that idle speed. but a cammed car that doesnt sound cammed is pretty bad ***. super sleeper
03-26-2012, 10:16 PM
#22
I saw someone put in pushrods that were the wrong length. Can't remember if they were to long or to short but it sounded like their was a stock can in it. He finally got it right and now it sounds great. Although when it had the wrong pushrods it was very noisey
03-27-2012, 01:37 AM
#23
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have your tuner set your idle lower, around 850, and try and lean it out some in the idle range, and maybe lower the timing a tad, in the idle zone. This works for me to add the "chop"!!
03-27-2012, 07:39 AM
#24
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Like I said, mine idles at 950-975 and this is what it sounds like...
http://www.youtube.com/watch?v=qBdEr...4&feature=plcp
we tried to lower the idle down to around 800 or so, and the car ran like ****. Sounded mean, but didnt run right.
http://www.youtube.com/watch?v=qBdEr...4&feature=plcp
we tried to lower the idle down to around 800 or so, and the car ran like ****. Sounded mean, but didnt run right.
03-27-2012, 08:56 AM
#27
Tune it to idle at 900rpm or so should help but it should still be noticeable where its at. Mine is with a 230/238 1113+2.
Pushrods could be too short but the rockers should be making noise if that's the case and I wouldn't expect the strong dyno numbers. So not very likely.
It could be all in the tune. If it has a lot of timing at idle sometimes that makes it less choppy I've heard. You can also run the cam numbers to figure out how much overlap you have. It might look big, but the chop comes from overlap. You can have a "small" cam with a lot of overlap and make it sound nasty (Comp sells them as Thumper cams).
Pushrods could be too short but the rockers should be making noise if that's the case and I wouldn't expect the strong dyno numbers. So not very likely.
It could be all in the tune. If it has a lot of timing at idle sometimes that makes it less choppy I've heard. You can also run the cam numbers to figure out how much overlap you have. It might look big, but the chop comes from overlap. You can have a "small" cam with a lot of overlap and make it sound nasty (Comp sells them as Thumper cams).
03-27-2012, 06:16 PM
#29
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Gotta love those cats @ ECS...Haven't hit the strip yet this year, Matt @ ECS says I should be able to get into the 10's, which is what I was shooting for per all motor. Of course the supercharger would be nice, but its getting harder and harder to trick the wife into not knowing I have added yet another power mod...Although it goes without saying (as many have stated), power is what matters, not sound, which I agree with mostly, but I am one who favors the sound of my ride over the radio any day; long live lope!
03-27-2012, 08:40 PM
#30
Yeah you should clearly be able to hear it!, Mines a 227/231 111lsa (7*overlap), w/950 idle and it's very obvious.
http://youtu.be/j0C2t5Hs8CE
http://youtu.be/j0C2t5Hs8CE
Last edited by 99Bluz28; 03-27-2012 at 08:47 PM.
03-27-2012, 11:16 PM
#31
cam duration has only a little bit to do with the chop sound or lope sound....
valve events mean a lot more..
need to know actual valve events to know how much overlap you have, then we can say how choppy it should sound..but even that is not 100% certain as when the tune is good it will sound more tame than a tune that is not as good..
I have a perfect example...
my car... 248/252 .649/.646 112LSA+4 (duration at .050)(duration at .006 is 304/314)
I'm using the Holley Dominator ECM for engine management
and my cam does not sound all that big...
valve events mean a lot more..
need to know actual valve events to know how much overlap you have, then we can say how choppy it should sound..but even that is not 100% certain as when the tune is good it will sound more tame than a tune that is not as good..
I have a perfect example...
my car... 248/252 .649/.646 112LSA+4 (duration at .050)(duration at .006 is 304/314)
I'm using the Holley Dominator ECM for engine management
and my cam does not sound all that big...
Last edited by soundengineer; 03-28-2012 at 09:36 AM.
03-28-2012, 02:06 AM
#32
My MS3 lopes hard too at a 950 idle with a 113lsa through my Hooker CB or through the cutout...like others have said have your tuner play with the idle
http://i135.photobucket.com/albums/q...c/23d89ef3.mp4
http://i135.photobucket.com/albums/q...c/23d89ef3.mp4
03-28-2012, 11:26 AM
#34
In addition to taking a look at the valve events that impact this, it's amazing what a difference the exhaust setup makes.
I have a modest street cam in a 346 and it has a very subtle chop through full exhaust (headers, off road y and catback), however as soon as you crack the cutout open the cam lobe is extremely obvious.
So obvious that I've had a little old lady that obviously knows nothing about cars come up to me and ask me if the car sounds like that because something is broken.
I have a modest street cam in a 346 and it has a very subtle chop through full exhaust (headers, off road y and catback), however as soon as you crack the cutout open the cam lobe is extremely obvious.
So obvious that I've had a little old lady that obviously knows nothing about cars come up to me and ask me if the car sounds like that because something is broken.
