Y-pipe Gains?
06-03-2005, 03:59 PM
#1
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Y-pipe Gains? Not going to get headers for a while now but found a great deal on a catted aftermarket y-pipe for the stock manifolds. Any idea on how much of a gain it will net? I know the stock y-pipe is a flat POS and I figured that this would help me out some.
PS: It is for a 98, will it work on my 99?
PS: It is for a 98, will it work on my 99?
06-03-2005, 04:31 PM
#6
I got the slp replacement y when i had stock manifolds and cats, feld little to no gain. And isn't life grand my kooks 3" ory is flat on the driver side for clearance. I even took a 2x4 and flatened it a little more. Another vote for saving the money for something else.
06-03-2005, 04:44 PM
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I'd buy a lid before I'd buy a manifold Y pipe....and if I did buy a manifold y pipe it would be WITHOUT cats.....
Last edited by 01black; 06-03-2005 at 04:57 PM.
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06-03-2005, 05:33 PM
#8
Even without cats you will gain 0-2 rwhp max. Why? Because the manifolds are the choke point in the system, not the cats and not the y-pipe. Both outflow the manifolds by a good margin.
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2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
06-03-2005, 06:23 PM
#9
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Does anyone have dyno results of the Random Tech 2-3/4 catted y-pipe for the stock manifolds? The ole man isn't lookin to do headers and was thinking about running their y-pipe with high-flow cats.
They claim around 10 hp but seeing as a 2-1/2 SLP doesn't give but 2-5 hp I don't really know if 1/4" bigger piping and highflow cats will give you another 5-7. Anyone run this y-pipe, what are your experiences with it?
couldn't find too much through the search.
Thanks
-J-
They claim around 10 hp but seeing as a 2-1/2 SLP doesn't give but 2-5 hp I don't really know if 1/4" bigger piping and highflow cats will give you another 5-7. Anyone run this y-pipe, what are your experiences with it?
couldn't find too much through the search.
Thanks
-J-
As Patrick said, the exhaust manifolds are the bottleneck. The best y-pipe in the world might add 0-3 rwhp max. Why waste your money?
06-03-2005, 07:44 PM
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The y-pipe I am looking at is brand new and has never been installed on a car. I just thought it would be a good upgrade compared to that stock flat piece of crap y-pipe that is on there right now. I am able to get this y-pipe for $50 from a friends dad. Just figured it might have been worth a shot since I know the stock cats are very restrictive and I thought that I heard people have gained a good bit of power by swapping them out or losing them all together.
06-03-2005, 08:25 PM
#12
The stock cats are high flow cats, they are not VERY restrictive. Also, the flattened part of the y-pipe is not restrictive just ugly. I bought the SLP y-pipe cause I got it for a good price, but I payed for 0-2 hp and a y-pipe that bangs. I guess $50 for 0-2 hp is pretty good as far as the hp/$ ratio is concerned. Just don't get too excited, I don't want you to be let down. You won't notice a seat of the pants gain. It will be more of an appearance mod.
06-03-2005, 11:06 PM
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Originally Posted by LS1BlackBird99
Not going to get headers for a while now but found a great deal on a catted aftermarket y-pipe for the stock manifolds. Any idea on how much of a gain it will net? I know the stock y-pipe is a flat POS and I figured that this would help me out some.
PS: It is for a 98, will it work on my 99?
PS: It is for a 98, will it work on my 99?
06-04-2005, 03:34 PM
#14
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Originally Posted by Redneck Z
The stock cats are high flow cats, they are not VERY restrictive. Also, the flattened part of the y-pipe is not restrictive just ugly. I bought the SLP y-pipe cause I got it for a good price, but I payed for 0-2 hp and a y-pipe that bangs. I guess $50 for 0-2 hp is pretty good as far as the hp/$ ratio is concerned. Just don't get too excited, I don't want you to be let down. You won't notice a seat of the pants gain. It will be more of an appearance mod.
06-04-2005, 10:51 PM
#15
QUOTE: The stock cats are really high flow? Why do people even bother buying aftermarket random-tech cats for their cars? I would have cut them off to begin with if it wouldn't sound like crap with my cutout. Yea, I wasn't honestly expecting a huge gain from the y-pipe but I thought it might be worth a shot and I can just sell it when I do LT's and get my money back out of it. If only I could win the lottery...
I think most people do high flow cats when they go to longtubes or need to replace a bad cat.
Sounds like you've made up your mind. If thats what you want to do, then go for it.
I think most people do high flow cats when they go to longtubes or need to replace a bad cat.
Sounds like you've made up your mind. If thats what you want to do, then go for it.
06-05-2005, 08:00 AM
#18
Originally Posted by hpjunky98
well is it worth wile for somone like me who is in cali and is going to get shorties?
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
06-05-2005, 08:13 AM
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Pick up a new Catback system and forget the Y-pipe until you do headers. I had the SLP Y-pipe before I did headers and it made little difference. Go with the mods that do make a difference.
Lid, Catback, headers and torque converter will put you in the twelve’s.
Good luck,
Al
Lid, Catback, headers and torque converter will put you in the twelve’s.
Good luck,
Al
06-05-2005, 12:27 PM
#20
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Originally Posted by AKRA
Pick up a new Catback system and forget the Y-pipe until you do headers. I had the SLP Y-pipe before I did headers and it made little difference. Go with the mods that do make a difference.
Lid, Catback, headers and torque converter will put you in the twelve’s.
Good luck,
Al
Lid, Catback, headers and torque converter will put you in the twelve’s.
Good luck,
Al
