Will this cam lope through cats/magnaflow?
09-07-2007, 07:06 PM
#1
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Will this cam lope through cats/magnaflow? hey guys, just curious to see if a g5x1 (228/232 112LSA) will still lope hard through LT's, catted Y and Magnaflow catback? will it be good and noticeable?
09-07-2007, 09:50 PM
#2
should lope for a decent cam on the 112LSA and if not, a cutout will do the trick. When I am in low gear and have my foot off the gas, I can hear my stock cam thru my magnaflow with the cutout open but I do have an ORY, even tho I dont see cats killing the lope. You could always try a search on here or ls1sounds.
09-08-2007, 07:51 AM
#3
Doesnt matter if it is on a 112 or not. That just moves the overlap either + or -. You will have 6+ positive degrees of valve overlap. Yea, it is gonna have some lope to it. There are cams that have negative overlap that still lope. LSA isn't gonna do anything but move the powerband broad or tight.
Bottom line for your question is yes it will lope. I assure you it will be noticeable.
Bottom line for your question is yes it will lope. I assure you it will be noticeable.
09-08-2007, 07:58 AM
#4
doesnt the LSA tho account for HOW much it will lope, like if it will lope slower or faster? listening to the same car, same cam, but different LSA always gives me the impression, the lower the LSA, the more lope in terms of a slower, more muscles car sound lope. Obviously it has more to do with then just sound, but as concering to this thread, I thought that the lower the LSA, the more slower lope the cam will have making it more noticeable.
09-08-2007, 08:09 AM
#5
It factors into the equation, so you are half right. Let me show you the formula. Mine is a good example of the LSA myth if the link in my sig is working.
244/248 .598/.598 115
Take the exhaust and intake durations and add them together.
244+248 = 492
Take the sum (492) and divide by 2.
492 / 2 = 246
So now that you have the avg of the two combined.
Take the LSA without the advance (be it +0 +2 +4...ect) and double it.
115 x 2 = 230
Take 246 from the avg of the durations and subtract the LSA x 2.
246-230 = 16
My cam is very choppy and it is caused from the extreme 16+ degrees of valve overlap. The stock cam has like 17-22 degrees of negative overlap (I don't have the specs of a stock cam in front of me otherwise I could tell ya what it is), so you will not hear the time between the valves opening and closing as easily. Granted it is there, just not near as drastic.
Make sense? I think that is as simple as it can be drawn out.
So basically you can have a car that has a 190/192 duration and a 108 Lobe separation and have a sleeper as far as lope is concerned. Theorhetically.
As far as your muscle car sound...If it is a big duration such as the case of a solid roller cam setup where you are dealing with 270-290 degrees of duration then you are going to get a slow lope because the valves are open for that much longer. In a sense that is where that comes from.
244/248 .598/.598 115
Take the exhaust and intake durations and add them together.
244+248 = 492
Take the sum (492) and divide by 2.
492 / 2 = 246
So now that you have the avg of the two combined.
Take the LSA without the advance (be it +0 +2 +4...ect) and double it.
115 x 2 = 230
Take 246 from the avg of the durations and subtract the LSA x 2.
246-230 = 16
My cam is very choppy and it is caused from the extreme 16+ degrees of valve overlap. The stock cam has like 17-22 degrees of negative overlap (I don't have the specs of a stock cam in front of me otherwise I could tell ya what it is), so you will not hear the time between the valves opening and closing as easily. Granted it is there, just not near as drastic.
Make sense? I think that is as simple as it can be drawn out.
So basically you can have a car that has a 190/192 duration and a 108 Lobe separation and have a sleeper as far as lope is concerned. Theorhetically.
As far as your muscle car sound...If it is a big duration such as the case of a solid roller cam setup where you are dealing with 270-290 degrees of duration then you are going to get a slow lope because the valves are open for that much longer. In a sense that is where that comes from.
09-08-2007, 08:31 AM
#7
Probably more info than you wanted to take in, but cams are one of my main knowledge points. Once you have installed more than you can remember and have sold them for years you tend to pick up on what does what pretty easily. Don't ever let the LSA decide what cam though. It is valve events as a whole that will make or break cam performance.
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09-08-2007, 06:05 PM
#10
Originally Posted by orangeapeel
Probably more info than you wanted to take in, but cams are one of my main knowledge points. Once you have installed more than you can remember and have sold them for years you tend to pick up on what does what pretty easily. Don't ever let the LSA decide what cam though. It is valve events as a whole that will make or break cam performance.
Yeah, Ill remember that. I guess more so what I meant was that on like a 228/228 cam, it will lope more or have a more slower lope with a lower LSA and that was really all I meant by it but know I have a better way of deciding on a cam (not that I was looking at just the LSA but the more knowledge, the better a decision can be made) which is something hopefully I will accomplish soon.
09-08-2007, 06:20 PM
#13
yeah, i know you werent hammering me about it, i was just explaining myself i guess and your response was very educational and helpful for me and if I have any more questions, I know who to ask in the future because it can be hard to come by good answers these days. most are just opinions for what the other person would want or people wanting your $$$.
on a side note, we did hijack this thread like a terrorist on a plane.
...sorry camaroz28
on a side note, we did hijack this thread like a terrorist on a plane.
...sorry camaroz28
09-08-2007, 09:02 PM
#14
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stop worrying...lol I worried about the same thing...lol
my cam is smaller than that...wellthe way crane measures it is.....lolthis is on a 114 through a lt ory flowmaster setup yor muffler should flow alot better......
through same setup stock camclick to listen
crane vinci #66 on 114 through same exhaustclick to listen
in my sig there is a open cutout clip....hope this helps...
my cam is smaller than that...wellthe way crane measures it is.....lolthis is on a 114 through a lt ory flowmaster setup yor muffler should flow alot better......
through same setup stock camclick to listen
crane vinci #66 on 114 through same exhaustclick to listen
in my sig there is a open cutout clip....hope this helps...
11-04-2007, 10:12 AM
#16
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thread revival......welll i ordered a 228/232 .588/.592 110+4 LSA and im really worried i wont be able to hear it through my somewhat restricive exhaust. What can i do to louden up my system without putting a cutout in. Change the cats to more high-flow ones? Would a lid somehow make it louder because im runnning stock intake?
