JoeDirt

Hey ,

I have kooks headers, kooks catted Y pipe and slp loudmouth catback. How much power would this kill to put the stock WS6 catback back in there ?? I heard it actually flows quite well is this true ? Has anybody done this ?

My car dynoed 390 rwhp with the current exhaust . . .. would it be more than 5rwhp loss ??

Damian

iTrader: (89)

Bro, hopefully you know better than that. Expect to lose 15-20 through a stock catback with your mods. (BTW, the WS6 catback doesn't flow any better than the T/A catback).

The Loudmouth catback SUCKS after getting headers. I'm assuming you want something quiet? If so there is a lot more options out there to quiet the car down and not lose power. Putting a stock catback on would be the worst of those ideas...

LS1LT1

iTrader: (16)

It doesn't suck actually (flows quite well), it just sounds like **** in most cases.
I like the idea of a stock exhaust behind a stout set up but ONLY with a cut out for when all the power is needed.

JoeDirt

I actually really love the sound but I cant floor it in town anymore without getting ALOT of attention. I have cats so the sound is quite a bit more refined than with ORY. With the windows up it doesnt drone , sounds quiet . .. but outside its like I opened up the gates of hell at 6500 rpm

I miss being able to mash the gas everywhere . . . .all the time

Damian

iTrader: (89)

I didnt say it sucked performance wise

But IMO it sounds like 25 Ducks getting poked up the *** around 2500 rpms without cats....

cyphur

iTrader: (10)

ROTFLMFAO that was ****** funny

derrrr......just slightly...yea

Mike K.

You could always install it but put a cutout on as well, electric one perhaps.

Z28Venom

iTrader: (13)

If you really want to quiet it down, install the WS6 Catback which flows really well. Also add a cutout to the i-pipe and you're good to go..

Good luck..

ROCNDAV

iTrader: (100)

What is so bad about it? It is 3" all the way back. Is it the muffler that sucks?

I was given a WS6 cat back for free and will probably mount it to my 395. The $200~$500 I was going to use for an after market cat back can be applied else where for now.

David

cyphur

iTrader: (10)

put a cut out in when you need power. or swap out the muffler.

JamRWS6

15-20? More like 5-10
The catback flows much better than the stock TA piece, not sure where you got that idea.

JoeDirt

Well I guess Ill keep my loudmouth on there for now but in the name of automotive science maybe Ill swap the ws6 back in and dyno just to see

Thanks for the help

Damian

iTrader: (89)

Because i've personally done back to back testing on the "SS" catback(same muffler as WS6) vs. stock on my car. The "SS" muffler made 2 more HP. Which was probably more dyno variation than anything...

The WS6 catback with a cutout would work, but expect to lose a minimum of 10-12 rwhp over what you've got now through the muffler....

f-bodman

SS catback is not the same as WS6, my friends SS catback was 2 1/2" whereas a WS6 catback is 3", conversion was done by two completely different companys. (SLP & ASC)

f-bodman

You're saying some one would pick up 15-20 hp with a catback

Damian

iTrader: (89)

The pipe is 2 3/4 on intermediate and over axle while 2 1/2 coming out the muffler, on both cars. It is the same. There is no such thing as a 3 inch stock catback for an F-body. I've pulled stock mufflers off of both cars and they are the same. Unless of course we're referring to the SLP D/D option, which is different.

No, I am not saying a catback will give you 15-20 HP. I am saying with a internally modded engine, a stock muffler will rob 15-20 HP through full exhaust, as to where a "better" muffler would only rob 6-10 (FWIW, my Hooker exhaust only pulled 4 HP out of my 476 rwhp setup vs. the cutout).

I've been there and done it, like 4 yrs ago....I feel like a newb arguing about a stock muffler

f-bodman

I stand corrected, I have just read alot of posts saying the WS6 catback flows very well??

But that's why I'm here, to learn

badpewter-z

iTrader: (4)

omg that description rocks

now back to the subject yes you will lose power
10-20 is norm for stock cat backs, if you need quiet get a dual dual very quite even w/o cats and wont lose as much

Damian

iTrader: (89)

The reason they only got 5 HP out of a B&B TriFlow is because the TriFlow sucks donkey ***** and barely flows better than stock

If you want a good comparison, I gained 15 rwhp over my SS muffler going to a Hooker catback system on a stock internal motor.

TriFlow is a HORRIBLE flowing system..

spoonfed

I can't argue the merits of stock WS6 exhaust versus aftermarket power losses/gains but I can say that with my cutout open I only pick up 7 rwhp and 6 ftlbs.

I'm running a H/C,LT, bolt-on, M6 car making 402 rwhp through the WS6 exhaust and 409rwhp with the cutout open. The beauty of this setup is that my car is not that much louder than stock(which I think is pretty healthy sounding) and I picked up two spare complete WS6 exhausts for free off guys replacing them.