Extractors or exhaust?

[underthunder]

Well, as the title says... I can get extractors or exhaust, which one would give me the most hp for a first mod?

[BLSTIC]

in my (not so) professional opinion, they should really be done at once. That said, an exhaust will make a decent difference on its own, and the note will be better than having extractors and a stock exhaust.

My car will be getting a 2.5" exhaust before anything else (bar the head gasket) gets replaced, whether I can find extractors or not.

cya
Ben

[EA Ghia]

As said before, you really need to do both at once to get the most out of them. If you really had to do one without the other, go the exhaust. You won't notice a whole lot of performance, but you'll get a nicer exhaust note. If you go the extractors, they don't really get enough room to breathe without a bigger exhaust.

[BLSTIC]

yeah. Its kinda like asking for a smoothie straw at maccas and half covering the end of it.

[El Venom]

i would do the extractors first, due to the fact that if you get the exhaust first it will have to be chopped and modified to have the extractors fitted. If you do the extractors first the exhaust can be made to suit at a later date. Also in my experience doing either one on its own isnt going to make a huge power difference

[underthunder]

I know that doing them individually won't change much, but I don't have the money to do both atm. Also I'm pretty sure it's the cat that gets modified, not the exhaust. So either way the cat can be modified to suit, longer at one end than the other or visa versa.

[El Venom]

the cat doesnt get modified. the length of the factory manifold and extractors is different, so the cat would be moved but the exhaust pipe will be different. I have and el with a cat back sports exhaust and the extractors are shorter then the factory manifold, so when i get the extractors installed they need to chop the pipe and modify a new one to have enough length to get it to line up and lift the cat closer to the floor for more clearence

[RG]

Originally Posted by daendo

the cat doesnt get modified. the length of the factory manifold and extractors is different, so the cat would be moved but the exhaust pipe will be different. I have and el with a cat back sports exhaust and the extractors are shorter then the factory manifold, so when i get the extractors installed they need to chop the pipe and modify a new one to have enough length to get it to line up and lift the cat closer to the floor for more clearence

Not true, no modification of the cat back system is required when fitting extractors. When extractors are fitted it is the cat that gets modified as the stock cat has a front pipe that goes up into the engine bay. Also aftermarket extractors are longer than the stock manifold on an EL, the length is in the cat set up.

[Krytox]

I'd do the extractors first.
Stock factory cat back exhaust flows very well.
However, once you fit the headers, you can do anything you want with the cat back and even fit it urself.

[underthunder]

I understand how it is all set up. The cat is shortened and flanges are welded on so the longer pipe on the extractors can go down under the car to the cat and bolt on. I was just asking what you guys think would give me the most hp. Its basically my first mod other than an XH snorkel. I dont care for sound atm, sound can come later. I need grunt! :P Didn't mean for a right and wrong match, just a few opinions

[[EDGHIA]]

i wreckon start with a 2.5" cat back..... if you have extractors going to a 2" exhaust i wont have a big change...... but atleast with the cat back it sounds good and will add a bit of power..... or why dont you just change the cam if you only want power???

[underthunder]

I just found this on eBay. http://cgi.ebay.com.au/Sports-Exhaus...QQcmdZViewItem Anyone know if this stuff looks any good? I'm a bit iffy on things unless I know it's a good brand. (Advance extractors, never heard of 'em, looks like a factory cat, and no idea what the exhaust is other than it's 2½".) It's either this stuff or I go to the shop pay the extra dosh for the 2½" cat back and Pacemaker extractors brand new, that way I know exactly what I'm getting.

[underthunder]

[EDGHIA] I'll be getting a regrind, eventually, only thing holding me back is the postage cost and pulling the cam out to send down, along with the bullshit that comes with it.

[snypereb]

Exhaust first personally.

[DEVL-XR]

Do cat back exhaust first, then get the extractors later on.

[underthunder]

Ok cool... I think it will be the zorst first. $280 fitted. Thanks heaps guys, I'm still learning

[Nostalgia]

Personally id wait till you have the coin for both exhaust and extractors. You will notice a huge difference as opposed to doing the two seperately. Nice car by the way, not much different to mine.

[underthunder]

Sure, its a good idea, but if I get the exhaust now, ill have some extra noise and a little bit more power until I get the cash to put the extractors on. I wont be losing any power or anything, I just don't get the whole package until later. Oh and thanks You're the first person to say that my completely stock car is nice :

[Nostalgia]

No worries mate. I did say 'personally' but my 1st choice would be to do the exhaust first also, as extractors on a stock exhaust IMO would be like pushing sxxx uphill with a pointed stick.

[jjj]

I am running pacemaker extractors, 2.5in high flow cat and a mercury 2.25in sports exhaust. The smaller exhaust works a hell alot better than the 2.5in redback one i had on previously.

Gained accleration down low and lost nothing up top.

Just remember that when they bolt up the sports exhaust it will be attached to a 2.25in pipe and flange from the back of the cat.

cheers...

[underthunder]

Originally Posted by jjj

I am running pacemaker extractors, 2.5in high flow cat and a mercury 2.25in sports exhaust. The smaller exhaust works a hell alot better than the 2.5in redback one i had on previously.

Gained accleration down low and lost nothing up top.

Just remember that when they bolt up the sports exhaust it will be attached to a 2.25in pipe and flange from the back of the cat.

cheers...

I don't understand how that works... Bigger pipes=Higher flow=More power. How did you gain more grunt with a smaller exhaust?

[Nostalgia]

Originally Posted by EAIIFalconS

I don't understand how that works... Bigger pipes=Higher flow=More power. How did you gain more grunt with a smaller exhaust?

Back pressure can also be beneficial.

[ebfalcon13.5]

exhaust + extracters makes low end a dog

[CaRtZ]

my mate has had a 2.5" on his ED for a while and got pacemakers a week ago. it had 93rwkw last month and all going well it will be back on the dyno tommorow with a reset ECU.