This Sucks !!
07-09-2007, 01:30 PM
#26
Banned
Join Date: 06-11-07
Location: Az
Posts: 5,417
Likes: 0
Received 0 Likes
on
0 Posts
you go ahead and do that, if you would do something against good sound advice form all these people because you want to see a friggin peice of paper go right ahead child, and if someone didnt know their cars performance well enough to tell when something is wrong they should not be driving a "go fast" car
07-09-2007, 01:34 PM
#27
Senior Member
Ohh come on adam you know that comment is flawed. I can't think of one person that has even dyno'd a full 3" catback system on this board but i may be wrong. The only guys i ever hear about how a 3" exhaust is wrong are the guys who are basing that opinion on there own thinking with no experience to back it up. They say a 3" is too large because they are simply thinking we're a 4cyl but we're not. I would venture to say the LSJ puts out 2-3X the exhaust gasses a N/A 4cyl would expel.
I don't remember seeing a dyno but I'm going by theory though and even you said that if you get a stage 2 that it will make up for the loss of power...
But I will agree that some torque loss is good cause you guys are FWD
07-09-2007, 01:39 PM
#28
Member
Join Date: 03-27-07
Location: Maryland
Posts: 303
Likes: 0
Received 0 Likes
on
0 Posts
Ohh come on adam you know that comment is flawed. I can't think of one person that has even dyno'd a full 3" catback system on this board but i may be wrong. The only guys i ever hear about how a 3" exhaust is wrong are the guys who are basing that opinion on there own thinking with no experience to back it up. They say a 3" is too large because they are simply thinking we're a 4cyl but we're not. I would venture to say the LSJ puts out 2-3X the exhaust gasses a N/A 4cyl would expel.
Good sounding advice? You mean personal opinion. Show me a dyno or STFU
Good sounding advice? You mean personal opinion. Show me a dyno or STFU
07-09-2007, 01:42 PM
#29
Banned
Join Date: 06-11-07
Location: Az
Posts: 5,417
Likes: 0
Received 0 Likes
on
0 Posts
Only dyno i could find at the redline forums. 2.8" pulley, custom tune, 3" downpipe and catback.
You whine like alittle girl.
once again acting little punk ass kid that needs a ******* beating. and your not a 4cyl huh? hmm i thought all balts were 4 bangers, guess i am the idiot. but in any case no its good advice, keep running your 3 inch little boy. i am starting the emails to flowmaster, magnaflow, etc to tell them that they can kiss my ass for telling me that they do not recommend a 3 inch for a ss/sc. i am sure you know more about exhaust then them. better yet why dont you show me a dyno proving me wrong?? since you know everyone other then you that posted here is wrong. but i guess it doesnt matter i am sure your parents pay for your car anyway
07-09-2007, 01:47 PM
#31
Senior Member
Also Onyx
Even if what you're saying is somewhat true, it can only expel as much exhaust as it can ingest. Granted some people are running 19+ lbs of boost pressure...this is all in the manifold. This doesn't mean that people are actually ingesting as much air as possible or that air pressure is a 100% benefit especially when it plays effect into the heat being produced per pound of boost.
Another point is that you can only expel so much exhaust per cycle...this plays into effect on how large the exhaust ports are...which...they aren't very large at all. It's like if I blew into a normal size straw and then got a straw that was a inch bigger, it's not going to have the same velocity of air going through it as the smaller straw. It's the same theory and effect.
Your exhaust is only as large as the smallest point.
Even if what you're saying is somewhat true, it can only expel as much exhaust as it can ingest. Granted some people are running 19+ lbs of boost pressure...this is all in the manifold. This doesn't mean that people are actually ingesting as much air as possible or that air pressure is a 100% benefit especially when it plays effect into the heat being produced per pound of boost.
Another point is that you can only expel so much exhaust per cycle...this plays into effect on how large the exhaust ports are...which...they aren't very large at all. It's like if I blew into a normal size straw and then got a straw that was a inch bigger, it's not going to have the same velocity of air going through it as the smaller straw. It's the same theory and effect.
Your exhaust is only as large as the smallest point.
Last edited by NJHK; 07-09-2007 at 01:47 PM. Reason: Automerged Doublepost
07-09-2007, 01:49 PM
#32
Member
Join Date: 03-27-07
Location: Maryland
Posts: 303
Likes: 0
Received 0 Likes
on
0 Posts
isnt that what i just said to you pretty much?? whining would be complaining, i wasnt complaining. i was stating the obvious. i noticed you didnt disagree with any of my "presumptions" so stop acting like the person i pegged you to be and quit argueing on this guys thread! he asking for help, and everyone but you has told him something. if you disagreed then say i disagree, not oh stfu, stfu, your stupid.
07-09-2007, 01:51 PM
#33
Banned
Join Date: 06-11-07
Location: Az
Posts: 5,417
Likes: 0
Received 0 Likes
on
0 Posts
Also Onyx
Even if what you're saying is somewhat true, it can only expel as much exhaust as it can ingest. Granted some people are running 19+ lbs of boost pressure...this is all in the manifold. This doesn't mean that people are actually ingesting as much air as possible or that air pressure is a 100% benefit especially when it plays effect into the heat being produced per pound of boost.
Another point is that you can only expel so much exhaust per cycle...this plays into effect on how large the exhaust ports are...which...they aren't very large at all. It's like if I blew into a normal size straw and then got a straw that was a inch bigger, it's not going to have the same velocity of air going through it as the smaller straw. It's the same theory and effect.
Even if what you're saying is somewhat true, it can only expel as much exhaust as it can ingest. Granted some people are running 19+ lbs of boost pressure...this is all in the manifold. This doesn't mean that people are actually ingesting as much air as possible or that air pressure is a 100% benefit especially when it plays effect into the heat being produced per pound of boost.
Another point is that you can only expel so much exhaust per cycle...this plays into effect on how large the exhaust ports are...which...they aren't very large at all. It's like if I blew into a normal size straw and then got a straw that was a inch bigger, it's not going to have the same velocity of air going through it as the smaller straw. It's the same theory and effect.
07-09-2007, 01:56 PM
#34
Senior Member
07-09-2007, 02:03 PM
#35
ok ... if 3" is so necessary why is GM running a 2.25 " exhaust on their time attack cobalt maybe it was 2.5 but still.. it's a SC car, yes the loss of a few ft/lbs of torque wouldn't be horrible off the line... turbos need free flowing and less restriction, there are a bunch of people on redline forums who've gotten the vibrant 3" exhaust and most have said there's at least a little bit of low end loss.
Hell after I get my car boosted and built i'll be going to a 3" but my meager HP goal is 350WHP which is a good spot for a 3" exhaust... to free of flow hurts you N/a or SCed because back pressure helps
ps your dyno only shows the after... a before needs to be seen before that dyno matters
Hell after I get my car boosted and built i'll be going to a 3" but my meager HP goal is 350WHP which is a good spot for a 3" exhaust... to free of flow hurts you N/a or SCed because back pressure helps
ps your dyno only shows the after... a before needs to be seen before that dyno matters
07-09-2007, 02:51 PM
#36
Member
Join Date: 03-27-07
Location: Maryland
Posts: 303
Likes: 0
Received 0 Likes
on
0 Posts
ok ... if 3" is so necessary why is GM running a 2.25 " exhaust on their time attack cobalt maybe it was 2.5 but still.. it's a SC car, yes the loss of a few ft/lbs of torque wouldn't be horrible off the line... turbos need free flowing and less restriction, there are a bunch of people on redline forums who've gotten the vibrant 3" exhaust and most have said there's at least a little bit of low end loss.
Hell after I get my car boosted and built i'll be going to a 3" but my meager HP goal is 350WHP which is a good spot for a 3" exhaust... to free of flow hurts you N/a or SCed because back pressure helps
ps your dyno only shows the after... a before needs to be seen before that dyno matters
Hell after I get my car boosted and built i'll be going to a 3" but my meager HP goal is 350WHP which is a good spot for a 3" exhaust... to free of flow hurts you N/a or SCed because back pressure helps
ps your dyno only shows the after... a before needs to be seen before that dyno matters
07-09-2007, 03:07 PM
#40
Banned
Join Date: 06-11-07
Location: Az
Posts: 5,417
Likes: 0
Received 0 Likes
on
0 Posts
ok ... if 3" is so necessary why is GM running a 2.25 " exhaust on their time attack cobalt maybe it was 2.5 but still.. it's a SC car, yes the loss of a few ft/lbs of torque wouldn't be horrible off the line... turbos need free flowing and less restriction, there are a bunch of people on redline forums who've gotten the vibrant 3" exhaust and most have said there's at least a little bit of low end loss.
Hell after I get my car boosted and built i'll be going to a 3" but my meager HP goal is 350WHP which is a good spot for a 3" exhaust... to free of flow hurts you N/a or SCed because back pressure helps
ps your dyno only shows the after... a before needs to be seen before that dyno matters
Hell after I get my car boosted and built i'll be going to a 3" but my meager HP goal is 350WHP which is a good spot for a 3" exhaust... to free of flow hurts you N/a or SCed because back pressure helps
ps your dyno only shows the after... a before needs to be seen before that dyno matters
07-09-2007, 03:15 PM
#42
Quote me where i said it was "Necessary" for our cars to have a 3" exhaust. All i said is that if you want max power you should have a 3" downpipe/catback. You guys said 3" is too large and i proved you wrong with a dyno yet i'm still wrong when i posted facts and not just opinions.
everything always turns into a fight here, damn guys, chill out.
07-09-2007, 03:16 PM
#43
Quote me where i said it was "Necessary" for our cars to have a 3" exhaust. All i said is that if you want max power you should have a 3" downpipe/catback. You guys said 3" is too large and i proved you wrong with a dyno yet i'm still wrong when i posted facts and not just opinions.
regardless... on a basically stock car... 3" exhaust is too much... hell hahn says a 2.5" kit would be perfectly fine for their kit for th 2.4... and thats a turbo kit so you want less back pressure..
now i went against my own rule by posting more...
seriously ... lately this board is turning into a troll/flame fest... and less of a site to get useful information..
Last edited by elecblue06; 07-09-2007 at 03:16 PM. Reason: Automerged Doublepost
07-09-2007, 03:16 PM
#44
Member
Join Date: 03-27-07
Location: Maryland
Posts: 303
Likes: 0
Received 0 Likes
on
0 Posts
how did you prove anyone wrong.... you didn't post a baseline from before the exhaust... and no for max power you don't want that little resistance... free flow is hurting the lsj...
regardless... on a basically stock car... 3" exhaust is too much... hell hahn says a 2.5" kit would be perfectly fine for their kit for th 2.4... and thats a turbo kit so you want less back pressure..
now i went against my own rule by posting more...
regardless... on a basically stock car... 3" exhaust is too much... hell hahn says a 2.5" kit would be perfectly fine for their kit for th 2.4... and thats a turbo kit so you want less back pressure..
now i went against my own rule by posting more...
07-09-2007, 03:20 PM
#45
Senior Member
how did you prove anyone wrong.... you didn't post a baseline from before the exhaust... and no for max power you don't want that little resistance... free flow is hurting the lsj...
regardless... on a basically stock car... 3" exhaust is too much... hell hahn says a 2.5" kit would be perfectly fine for their kit for th 2.4... and thats a turbo kit so you want less back pressure..
now i went against my own rule by posting more...
seriously ... lately this board is turning into a troll/flame fest... and less of a site to get useful information..
regardless... on a basically stock car... 3" exhaust is too much... hell hahn says a 2.5" kit would be perfectly fine for their kit for th 2.4... and thats a turbo kit so you want less back pressure..
now i went against my own rule by posting more...
seriously ... lately this board is turning into a troll/flame fest... and less of a site to get useful information..
07-09-2007, 03:24 PM
#46
Banned
Join Date: 06-11-07
Location: Az
Posts: 5,417
Likes: 0
Received 0 Likes
on
0 Posts
People think i'm talking about stock cars? 
Then i agree 2.5" is ideal for stockers but for those going with S2 and 2.8" and smaller pulley's then 3" would be advisable.
You don't want to run a 3"? That's fine. It's all good.
Then i agree 2.5" is ideal for stockers but for those going with S2 and 2.8" and smaller pulley's then 3" would be advisable. You don't want to run a 3"? That's fine. It's all good.
07-09-2007, 03:29 PM
#48
Banned
Join Date: 06-11-07
Location: Az
Posts: 5,417
Likes: 0
Received 0 Likes
on
0 Posts
07-09-2007, 03:29 PM
#49
Senior Member
Join Date: 06-06-06
Location: Redding, Nor-Cal.
Posts: 2,889
Likes: 0
Received 0 Likes
on
0 Posts