Are high flow cats really pointless? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ebaugh1990 · 04-20-2013, 04:18 PM

Quote:

Originally Posted by litle88

Damn straight!!!

Me having an obsession with my car is putting it mildly lol

Cangt77 · 04-21-2013, 02:04 AM

If I get long tubes though I would obviously have to take off my high flow cats correct though? That is one thing I was thinking about in my future

monSSter · 04-21-2013, 02:09 AM

My tuner has LTs with off road pipes, I have shorties with hi flo cats. And his car dynos 8rwhp more than mine. If you plan on doing a cam, gears, blower, ect. Than you need LTs. But if your just looking to make your daily driver a bit more fun, than u got the best bang for your buck. In my opinion....

litle88 · 04-21-2013, 06:44 AM

Quote:

Originally Posted by monSSter

My tuner has LTs with off road pipes, I have shorties with hi flo cats. And his car dynos 8rwhp more than mine. If you plan on doing a cam, gears, blower, ect. Than you need LTs. But if your just looking to make your daily driver a bit more fun, than u got the best bang for your buck. In my opinion....

Your tuner either sucks or his car is on 7 cylinders or the dyno is not set up correctly, sorry but I'm calling BS.

monSSter · 04-21-2013, 07:31 AM

Quote:

Originally Posted by litle88

Your tuner either sucks or his car is on 7 cylinders or the dyno is not set up correctly, sorry but I'm calling BS.

I don't see why it's so hard to believe. They are both L99s. One with LTs and one with shorties. Nothing else. What kind of gains do you expect? I'm pretty sure it was 8rwhp. If it was more, it wasn't anything significant. I picked up my set up from the classifieds here for less than 190$ with the high flo cats. So in my eyes, yes I did get more bang for my buck.. Or I could have dropped 1k plus to get the same gains I have have now with wut maybe 8-15 HP? But like I said it was IN MY OPINION, based on my situation. No need to loose sleep

RJT-SS · 04-21-2013, 07:36 AM

Yes, you did get a good bang for YOUR buck. I think what litle88 is saying though is that, with a good/proper tune, the gain differential of LTs over shorties is greater than 8 rwhp.

monSSter · 04-21-2013, 07:40 AM

I see what he's saying. Just don't like the way he comes off. My dyno sheets in car, I'm gonna say my max pull was around 374 HP with my current set up. can someone post wut there L99s putting out with LTs and cats? Thanks. Just for a good comparison

litle88 · 04-21-2013, 07:40 AM

Are you serious? Come on man it doesn't matter it its an L99 you are not 8hp short of a Lt car with your shorties. Don't come in here saying that because you'll look like a really complete newbie, which you might be BUT then you must do some more research. Shorties do nothing really. Trust me I'm not loosing sleep on some wild claims lol.

monSSter · 04-21-2013, 07:44 AM

I see u had a lot of work done to your car. Do you remember wut your dyno pull was with just LTs?

Mchlgrrsn · 04-21-2013, 08:30 AM

Headers should produce about 30 rwhp more than a car with shorties.

MightymouseSS · 04-21-2013, 08:57 AM

I've had shorties before my lts and there's a big difference. Shorties do add some power but nothing like what lts did for me. I dropped 1/2 a sec on the 1/4 making the switch. Never had my car dynoed but timeslips never lie.

RichP · 04-23-2013, 07:54 AM

Easy for me to believe because you did shorties + high flow cats. (did you tune? what did the tune add?)

On a stock motor L99 most of the gain people see with Long Tubes is from removal of the factory cats and then the tune adds some more.

Most of the low power gains from those who did shorties are because they kept the stock cats on.

Just about everyone on this forum agrees that the factory cats are the most restrictive part of the exhaust.

Quote:

Originally Posted by monSSter

I don't see why it's so hard to believe. They are both L99s. One with LTs and one with shorties. Nothing else. What kind of gains do you expect? I'm pretty sure it was 8rwhp. If it was more, it wasn't anything significant. I picked up my set up from the classifieds here for less than 190$ with the high flo cats. So in my eyes, yes I did get more bang for my buck.. Or I could have dropped 1k plus to get the same gains I have have now with wut maybe 8-15 HP? But like I said it was IN MY OPINION, based on my situation. No need to loose sleep

3GPa · 04-23-2013, 10:41 PM

Quote:

Originally Posted by Cangt77

I got my solo high flows installed today with my borla atak (LOVE the sound) but the guy who installed it was telling me that most people dont run cats and they I "wouldent pick up any power gains" with the solo high flows. Is this true? Is there any power difference or gains by adding the high flows or would I get more HP if I deleted the cats? I just want them so I can pass emissions and so the car doesn't smell like rotten eggs lol. Any info would be appreciated!

say, do you have any sound clips of you exhaust set up you can share?
Gus

daveagogo1 · 04-23-2013, 10:51 PM

Never once have i smelled rotten eggs. In my garage i might have a slight fuel smell but, i don't smell it on the streets at all unless i'm at a dead stop and maybe the wind kicks it up in my face just right.

What i do have however is a Camaro that sounds like it should.

04-21-2013, 02:09 AM	#17
monSSter Drives: 2017 SS Join Date: Dec 2010 Location: BOYNTON BEACH,FL Posts: 330 View My Garage	My tuner has LTs with off road pipes, I have shorties with hi flo cats. And his car dynos 8rwhp more than mine. If you plan on doing a cam, gears, blower, ect. Than you need LTs. But if your just looking to make your daily driver a bit more fun, than u got the best bang for your buck. In my opinion.... __________________

04-21-2013, 07:36 AM	#20
RJT-SS Drives: '11 2SS/RS A6 Join Date: Apr 2011 Location: New Orleans Posts: 504	Yes, you did get a good bang for YOUR buck. I think what litle88 is saying though is that, with a good/proper tune, the gain differential of LTs over shorties is greater than 8 rwhp. __________________ Performance Mods: Kooks 1-7/8 LTs; Calico coated w/HFCs, Solo Mach XL catback w/J-pipes, VMax TB, C.A.I. Intake, JRE Tune, RX Catch-Can

04-21-2013, 07:40 AM	#21
monSSter Drives: 2017 SS Join Date: Dec 2010 Location: BOYNTON BEACH,FL Posts: 330 View My Garage	I see what he's saying. Just don't like the way he comes off. My dyno sheets in car, I'm gonna say my max pull was around 374 HP with my current set up. can someone post wut there L99s putting out with LTs and cats? Thanks. Just for a good comparison __________________

04-21-2013, 07:40 AM	#22
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	Are you serious? Come on man it doesn't matter it its an L99 you are not 8hp short of a Lt car with your shorties. Don't come in here saying that because you'll look like a really complete newbie, which you might be BUT then you must do some more research. Shorties do nothing really. Trust me I'm not loosing sleep on some wild claims lol. __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

04-21-2013, 07:44 AM	#23
monSSter Drives: 2017 SS Join Date: Dec 2010 Location: BOYNTON BEACH,FL Posts: 330 View My Garage	I see u had a lot of work done to your car. Do you remember wut your dyno pull was with just LTs? __________________

04-21-2013, 02:04 AM	#16
Cangt77 Drives: 2011 Black 2SS/RS Manual Join Date: Jan 2013 Location: NY Posts: 114	If I get long tubes though I would obviously have to take off my high flow cats correct though? That is one thing I was thinking about in my future

04-21-2013, 08:30 AM	#24
Mchlgrrsn Stroked and blown Drives: 2010 LS3 2SS Join Date: Dec 2012 Location: Bridgewater, NJ Posts: 1,458 View My Garage	Headers should produce about 30 rwhp more than a car with shorties. __________________ LME 416 LS3 shortblock/Callies Compstar 4340 4"crank/Callies 6.125 H beams rods/Wiesco 4.07 forged pistons/Cam Motion custom LS1/LME ported heads /maggie TVS2300/I West 8rib 10%OD /3.2 pulley/OD cog drive/JRE tensioner/ID850 /ADM dual fuel/Kooks LT 1 7/8/magna flow2.5 /cat delete/Roto Fab CAI /MGW short throw /SPEC super twin clutch/G Force built trans,carbon syncro rear shaft upgrade /DSS 9"single CF DS /Strange 3.70/31 spline trutrac/MT DR's/earls oil cooler /tuned KHC

04-21-2013, 08:57 AM	#25
MightymouseSS Drives: 2011 LS3 Join Date: Jan 2012 Location: el paso tx Posts: 547	I've had shorties before my lts and there's a big difference. Shorties do add some power but nothing like what lts did for me. I dropped 1/2 a sec on the 1/4 making the switch. Never had my car dynoed but timeslips never lie. __________________ Vararam Stainless Works Headers Vmax TB SLP loudmouth 2 Nightfury Cam Mike Norris CC Tuned by Southwest Speed