: Hiflow Cats...



kimcheejeegae
06-21-05, 05:47 PM
Who here is using hiflow cats? I read on someone's post that they were using the Random Technology Hiflow Cats... and on their website, I can see the part numbers for the CTS-V (http://www.randomtechnology.com/cadillac.html).

How much were they? Are they bolt-on replacements or do they have to welded in? Once my Corsa goes on, I'd like to get the hiflow cats and then I have plans to get headers but not anytime soon.

Any other recommendations for hiflow cats are greatly appreciated! Thanks!

SBONES
06-21-05, 06:14 PM
I second that, I already have the corsa. The cats would just put it altogether nice...Right?

kimcheejeegae
06-21-05, 06:17 PM
I second that, I already have the corsa. The cats would just put it altogether nice...Right?


I'm hoping it does. It should liven the sound up some more... and maybe a tad more power?

willsctsv
06-21-05, 07:17 PM
you can not take out the stock cats and replace them with Random Tech cat's without doing headers. The stock cats are attached to the exhaust manifold via a down pipe.
Do the headers it is by far the best bolt on you can do. Much more power will be felt over an intake and exhaust combo alone!:coolgleam

Sefa01 has the TPIS headers with the Random tech cats. I can tell you his car runs!

I have the B&B headers, alot of hp gained. But I blew out 2 cats already. We both track the cars and Sefa01 has had no problems.

Now I run no cats.:sneaky:

kimcheejeegae
06-21-05, 07:19 PM
you can not take out the stock cats and replace them with Random Tech cat's without doing headers. The stock cats are attached to the exhaust manifold via a down pipe.
Do the headers it is by far the best bolt on you can do. Much more power will be felt over an intake and exhaust combo alone!:coolgleam

Sefa01 has the TPIS headers with the Random tech cats. I can tell you his car runs!

I have the B&B headers, alot of hp gained. But I blew out 2 cats already. We both track the cars and Sefa01 has had no problems.

Now I run no cats.:sneaky:


ah ha! that's the ticket! thanks for the info.

StealthV
06-21-05, 07:20 PM
The stock cats bolt to the stock manifolds so a Random Tech like solution will work with just a little wrenching.

StealthV
06-21-05, 07:25 PM
B&B Tri-Ys and Stock Setup

r_casino
06-21-05, 07:33 PM
Who here is using hiflow cats? I read on someone's post that they were using the Random Technology Hiflow Cats... and on their website, I can see the part numbers for the CTS-V (http://www.randomtechnology.com/cadillac.html).

How much were they? Are they bolt-on replacements or do they have to welded in? Once my Corsa goes on, I'd like to get the hiflow cats and then I have plans to get headers but not anytime soon.

Any other recommendations for hiflow cats are greatly appreciated! Thanks!

Random Tech has either bolt-in or weld-in.

I went with the Random Technology bolt-on replacements. I can't remember exactly, but somewhere around $350'ish each. Apparently the "weld in" sort is a lot cheaper, but then you need to weld 'em in. I went bolt-on so that I could do the work myself, could mix-and-match components, and could swap things out a bit more easily.

I'm not sure what else is out there, but I went with Random Tech 'cause it seemed they had a good reputation for quality and performance out on the net.

nukeduster
06-21-05, 07:45 PM
did you use track/high octane gas when at the track? alot of those fuels contain lead which might be why you killed your cats.. if an engine is tuned correctly, cats theoretically should never fail. I have a few vehicles with 200+k miles w/ no cat failures.

willsctsv
06-21-05, 10:24 PM
I had no idea that Random tech made direct replacement cats for the V. I thought they only had the weld in type.
As for burning up cats, No race gas only High test pump gas.
As I do more research I am finding that some of the guys on the LS1tech forum have burned out cats also.

Yes you can probably put 200K miles on stock or high flow cats. Start racing a road course and you will probably blow em.
They are not made for racing applications. Maybe a 1/4 mile run won't heat them up enough to damage them. I may be wrong there because on the LS1tech forum, most are running 1/4 mile and they also blew out cats.

Racing for 20 minutes at WOT and RPM's above 5000 constantly is brutal.
I'm shocked that Sefa01 did not melt down his cats, he really pushes the V. That is why I would buy Random tech. They are holding up on his car so far, and he has like 12 track days to my 4.

lasstss
06-21-05, 10:31 PM
I had no idea that Random tech made direct replacement cats for the V. I thought they only had the weld in type.
As for burning up cats, No race gas only High test pump gas.
As I do more research I am finding that some of the guys on the LS1tech forum have burned out cats also.

Yes you can probably put 200K miles on stock or high flow cats. Start racing a road course and you will probably blow em.
They are not made for racing applications. Maybe a 1/4 mile run won't heat them up enough to damage them. I may be wrong there because on the LS1tech forum, most are running 1/4 mile and they also blew out cats.

Racing for 20 minutes at WOT and RPM's above 5000 constantly is brutal.
I'm shocked that Sefa01 did not melt down his cats, he really pushes the V. That is why I would buy Random tech. They are holding up on his car so far, and he has like 12 track days to my 4.

I was the guinea pig for the random replacement cats. When I got them the lower exhaust connection was so big the donut fell thru. They had to rework the lower pipe to be smaller in ID. How they could screw up such a simple connection is beyond me. Anyway, mine are well seasoned and add more bark to the Corsa.:yup:

Florian
06-21-05, 11:30 PM
I have the RT cats and the Corsa...no fitment issues...easy install.. Get a set of O2 sensors though, the stock cats tend to munch the threads due to rusting. :rant2:

F

trukk
06-22-05, 11:26 AM
I just installed mine over the weekend, and they mated up fine with the Corsa. Florian is right, I'd get a big can of WD40, and soak the hell out of those o2 sensors. I ended up stripping one of the four. The pre-cat sensors really seem to get 'welded' in.

I took some pictures of the install. Also I'm going to get my car dyno'd ina few hours.

I'll post everything in a new thread later.

-Chris

willsctsv
06-22-05, 11:37 AM
Put anti seize on the threads of the new o2 sensors. Just incase you need to take them off for something or change them!

VELOSE
06-22-05, 12:41 PM
Will, do the aftermarket headers resonate inside the car? I know you and Sefa01 have different brands installed. Which header is quieter resonating inside of the car?

Thanks...;)

StealthV
06-22-05, 01:13 PM
No header resonance here; x-pipe yes. :)

Zero regrets with headers so far on this front.

trukk
06-22-05, 01:19 PM
Will, do the aftermarket headers resonate inside the car? I know you and Sefa01 have different brands installed. Which header is quieter resonating inside of the car?

Thanks...;)

I'll let you know once everything is broken in on my setup. Perhpas Martin could comment. I'm sure he would have mentioned if there was resonance issues with the Random Tech cats, as he moved from the BB to the Corsa for that reason.

As for the anti-sieze, I picked up a tube just to have it around, but I couldn't find any that worked @temps higher than 300 degrees. I ended up not putting it on my O2's when I swapped them, as I wasn;t sure what would happen to the anti-seize at the high Cat temperatures.

-Chris

willsctsv
06-22-05, 02:43 PM
Sefa01 has the resonator and I have the X pipe. I haven't been in his car. I have only a little drone if I'm loading the engine. Like carrying 6th gear up a hill at 2000 rpms. Otherwise only the kind of sounds you want to hear from your exhaust.:sneaky:

I don't know that headers do give resonance??:hmm:

VELOSE
06-22-05, 03:07 PM
Thanks guys. Where do I inquire about those TPIS headers? Can anyone link me?

kimcheejeegae
06-22-05, 03:56 PM
Thanks guys. Where do I inquire about those TPIS headers? Can anyone link me?
TPIS headers at More Performance (http://www.moreperformanceinc.com/index_catalog.php?auto=1005&cat=Exhaust&sub_cat_1=Headers)