QTP Lt's/Catted Y-pipe question
Originally Posted by slpss9723
hey taintedmeat: did you read the whole thread?? I had serious clearance issues with QTP's catted Y even after having it adjusted several times.....not trying to hurt QTP's business but i would strongly recommend spending a little more and get the RandomTech cats & Flowmaster merge collector individually and have a custom y built i wish i would have done that first instead of spending $525 plus labor to install, then $493.44 after shipping for the cats, and then $240 labor on my damn y-pipe setups: you can get the merge collector for $49.99 from QTP if you want to stick with them, then labor for install which you're going to have to spend anyway 
$543.43=a lot less headache in my opinion!!!
$543.43=a lot less headache in my opinion!!!
Launching!
Joined: Apr 2005
Posts: 263
Likes: 0
From: Abilene, TX
here's the pics with soda cans for reference......i told y'all i'd get them up today.....
http://community.webshots.com/photo/...09516508XnPgBs
http://community.webshots.com/photo/...09517642ddZgVg
http://community.webshots.com/photo/...09516508XnPgBs
http://community.webshots.com/photo/...09517642ddZgVg
Launching!
Joined: Apr 2005
Posts: 263
Likes: 0
From: Abilene, TX
it was actually a little more than 1.75 to start out and only got to about 1.5 lower than that at best......give or take a fraction of an inch....
Last edited by slpss9723; Jul 31, 2005 at 05:48 PM.
This is why I want to go with the dynatech supermaxx system. I have to have cats (sound quality reasons). The whole system is stainless. It might not flow as well as others because of the 2 1/2" y-pipe but it uses the power cats which are really small. I'm lowered so I need my ground clearance.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
Staging Lane
Joined: Mar 2005
Posts: 57
Likes: 0
From: midland, tx
Originally Posted by slpss9723
gawddamn that **** is low.......i don't know how you drive that around.....i couldn't stand mine that low, das why i had to get her fixed......
hope my setup looks near as good as that 
Launching!
Joined: Apr 2005
Posts: 263
Likes: 0
From: Abilene, TX
thanx michael, yeah....we'll have to hook up sometime especially after you get that vette all done i wanna see how that H/C combo works out for ya 
OBTW.......Renee said to tell you HI
OBTW.......Renee said to tell you HI
Last edited by slpss9723; Aug 2, 2005 at 01:36 AM.
I initially had ground clearance issues with my catted y as well. After some re-adjusting I now have 3 3/4" clearance. I am lowered 1".
From my research stock ground clearance is 5 1/4", so I lost 1/2", not too bad.
I do not scrape on anything except very large speed bumps, and I mean very large!!
Here is a picture of mine.
In retrospect I might have gone with a smaller diameter y-pipe. I don't know who needs a 3"??
I did slightly oval my left pipe and I have a hanger welded in to hold the pipe closer to the body than otherwise possible.
Good Luck!!!
From my research stock ground clearance is 5 1/4", so I lost 1/2", not too bad.
I do not scrape on anything except very large speed bumps, and I mean very large!!
Here is a picture of mine.
In retrospect I might have gone with a smaller diameter y-pipe. I don't know who needs a 3"??
I did slightly oval my left pipe and I have a hanger welded in to hold the pipe closer to the body than otherwise possible.
Good Luck!!!
I can't find the round cats you have on you pics here in this thread... I can only find the kinda square looking ones - random tech website sucks! Did you buy yours online? Where? Thanks!
Launching!
Joined: Apr 2005
Posts: 263
Likes: 0
From: Abilene, TX
yeah i bought them from them directly they are part #70300.....i had to tell them they were going to be used on an F-body and that i needed the 4" round cats......if you look on there website they are the 7000 series....that is actually a picture of them on random tech's main page down towards the bottom...........
Universal Fit Catalytic Converters
Round, Metal Matrix (Race)
7000 Series-- 2", 2-1/4", 2-1/2", 2-3/4", 3", 3-1/2" and 4" inlet/outlet
Universal Fit Catalytic Converters
Round, Metal Matrix (Race)
7000 Series-- 2", 2-1/4", 2-1/2", 2-3/4", 3", 3-1/2" and 4" inlet/outlet
Originally Posted by slpss9723
I would stay away from it if you have an incline or speed bumps anywhere near where you live......i had mine tweaked several times and it still scraped even taking stuff at angles, ultimately i had to have it cut up and customized with 2 RandomTech Cats to finally have some ground clearance, RandomTech #70300 $239.82 each is what i used, it will cost you more than the $525 catted y from QTP to buy your 4" Flowmaster merge collector, cats, and labor, but if you end up having to do what i did in order to get ground clearance anyway, it will save you the $525 from not buying the QTP and you won't pay for a y-pipe twice 
The QTP y-pipe does flow very well, but ultimately if you only need a little ground clearance, you should be fine because like the other guy said no other y-pipe flows better, but my customized "QTP" (only thing that is left is the merge collector) looks better and i haven't scraped a single thing, and i don't have to take **** at an angle now.....a lot more enjoyable to drive the car and not worry about it scraping Props to Steve @ The Muffer Shoppe in Abilene TX!!!! anyway here's some pics
Old One
http://community.webshots.com/photo/...08474097YztANC
http://community.webshots.com/photo/...08474314qIGrgR
http://community.webshots.com/photo/...08474630tmQSlb
New One
http://community.webshots.com/photo/...08476527SluKmD
http://community.webshots.com/photo/...08476533jXqkRX
http://community.webshots.com/photo/...08476630VobshI
The QTP y-pipe does flow very well, but ultimately if you only need a little ground clearance, you should be fine because like the other guy said no other y-pipe flows better, but my customized "QTP" (only thing that is left is the merge collector) looks better and i haven't scraped a single thing, and i don't have to take **** at an angle now.....a lot more enjoyable to drive the car and not worry about it scraping Props to Steve @ The Muffer Shoppe in Abilene TX!!!! anyway here's some pics Old One
http://community.webshots.com/photo/...08474097YztANC
http://community.webshots.com/photo/...08474314qIGrgR
http://community.webshots.com/photo/...08474630tmQSlb
New One
http://community.webshots.com/photo/...08476527SluKmD
http://community.webshots.com/photo/...08476533jXqkRX
http://community.webshots.com/photo/...08476630VobshI
If I got QTP HVMC, 4" Flowmaster merge collector, and the 2 random tech cats, how much would I be able to lower it?
Also, would it be worth getting cut-outs with that set-up, or would the gains be minimal?
Launching!
Joined: Apr 2005
Posts: 263
Likes: 0
From: Abilene, TX
as far as lowering goes......i dunno, but i think cut outs would be useless, the exhaust is going to be loud as hell anyway and i really think the gains would be minimal.....you might see a slight increase in rwhp with cutouts, but you would most likely lose rwtq and for those reasons i could not justify the cost of two cut outs because that would be the only way to do it......two in the y-pipe because the flowmaster merge extends so far back there is not really room for a cutout in your i-pipe....then you've really lost any ground clearance you may have gained putting the cutouts in the y.....Just my .02
I was talking about this with a friend today and he pretty much said the same thing. That the influence of cut-outs with a set-up like that would be minimal and not worth it.
Do they make a 3" flowmaster merge y pipe instead of the 4"? Thanks a lot for the info, it has helped me out a lot.
Do they make a 3" flowmaster merge y pipe instead of the 4"? Thanks a lot for the info, it has helped me out a lot.
