hey i was planning to put a gm supercharger on my 2.4 but i'm not sure when... if i put 2.5 inch exhaust from the header back will i lose power running it without the s/c??
because i dont wanna put on 2.25 if i'm just gonna throw on a s/c in not to long..
yes you would probably loose power until you put on the super
just wait then and do it all at once
Going 2 1/2 wouldn't be terrible...maybe slightly lower gains than 2 1/4 but it's good to have if your going to boost like Sappy was saying. It's also good if your going to do motor work like me for example I have a P & P head and bigger cam profile to allow more exhaust exit. In those cases it would be usefull. For people who just want to get a cat-back and intake and leave it at that...I'd say go 2 1/4".
www.kronosperformance.com / 732-742-8837
right on thanks... ya i am doing some engine work first .... cams and such so i think i will go with the 2.5"
Quote:
read this and all your questions will be answered, you won't loose anything. http://www.i-performance.biz/dyno/exhaust01.html
That sight is still up?
Ok, I'm not gonna start anything.
Wish prices were a lil cheaper though.
-M
Remember....syringes go in the RED waste basket.
go with 2.5" according to that site u will gain HP being on boost or not over 2.25
That site is a little biased since it is all an advertisement for their product.
Grain of salt.
-da chinchilla
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Sorry to take this off track, but did anyone look at what they want for their progamable ecu? There are alot of cavy's that cost less than that!
2.5" ID (inner diameter) is perfect for s/c. The way a s/c gains power (with out going into detail) is the release of exhaust gasses not too quick. Turbo on the other hand ... you get your power from releasing exhaust gasses so you would want to go 3"ID ... however .. 4"ID is too much. You dont want to release the exhaust gas too fast ... if you do .. that is when you start to loose power.
dan
thanks for all the input i
m going with 2.5
ahhh you people make me soooo mad... 2.5" on a N/A engine WONT MAKE YOU LOOSE ANY POWER AT ALLL.... HELL YOU COULD HAVE A 3" ON A N/A AND IT STILL WOULD BE FINE!
3" is over killl though buy 2.5" is just fine... i personaly would recomend it i know lots of people who run 2.5" exhaust on n/a engines and have no power loss.
ive got 2.5" mandrel bent-header,HFC, magnaflow muffler....with all my otehr mods (not much) i put down 151.4 whp, i wouldnt say u lose anything by going 2.5" 2 1/4 is for ppl that cant afford better, simple as that.
Black 97' Z24
Blacked Out and Lovin' It...
"Z Yaaaa"
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2.5" 2 1/4 is for ppl that cant afford better, simple as that.
Thats a load of crap........I could have gotten 2 1/2" for the same price, and as for your 151whp...............they are talking about low end power, you probably lost alot of low end to make a small gain on the top end.
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Yes officer I knew the speed limit was 50
^^^exactly...losing your ass on low end, making up for it on high end....how it is with a turbo also...you like your low end, go 2.5, you like you biotch screaming in the high RPMs, go 3.
lol, 4th, oh well, im working on it.
I have 2.5" Cat back i felt no loss on the bottom end but a Dyno will tell that but from my day to day driving no loss. Nice gain on the top end though but then again i did the whole header cat back, coverter at one time.
2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time
uhm.....i put down 149.9 trq to the wheels as well....
id say i didnt lose
Black 97' Z24
Blacked Out and Lovin' It...
"Z Yaaaa"
exactly.... there you go... you have your proof right there.... you don't loose ANY GOD DAMN HP with a bigger exhaust... i am trying to search for another topic that some one posted up dyno sheets with 2.5" and 3" full exhaust's on a naturally aspirated cavy i think and it didn't show any loss in power any where (low end or top end)
