Random Technology Cat for CLS
10-18-2007, 09:14 PM
#1
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Random Technology Cat for CLS
So, I've done some research and it seems ppl have mixed results on the rt catalytic converter. I already bought one from excelerate but havent installed it yet. So basically, there is hp to gain but torque to lose. I talked to rt and here's what they said:
As the saying goes, "there's no free lunch", but one of our high flow converters comes close. Typically, we see an increase of at least 5 horsepower at the wheels with our converters. The loss of torque is actually more theoretical than actual. In theory, it results from a reduction in back-pressure, but with the relatively small diameter of the exhaust pipes used on Acuras, there's still plenty of back pressure in the system. If you were talking about a truck, that was under heavy load at very low engine speeds, you MIGHT notice a loss of low speed torque. In a vehicle like a CL, it's really not an issue. I've attached a dyno test we ran on a Civic so you can see that the power increase is across the board, not just at the top end.
What do you guys think?
Oh, and I was thinking about getting an Apexi Neo and having it tuned; worth it or not?
As the saying goes, "there's no free lunch", but one of our high flow converters comes close. Typically, we see an increase of at least 5 horsepower at the wheels with our converters. The loss of torque is actually more theoretical than actual. In theory, it results from a reduction in back-pressure, but with the relatively small diameter of the exhaust pipes used on Acuras, there's still plenty of back pressure in the system. If you were talking about a truck, that was under heavy load at very low engine speeds, you MIGHT notice a loss of low speed torque. In a vehicle like a CL, it's really not an issue. I've attached a dyno test we ran on a Civic so you can see that the power increase is across the board, not just at the top end.
What do you guys think?
Oh, and I was thinking about getting an Apexi Neo and having it tuned; worth it or not?
10-18-2007, 10:49 PM
#4
says "hello to my TLX".
it looks like this cat is CARB legal in all states but California. 
this is what's kinda kept me from adding this on. i just might do this if Power Rev's IM mod falls through.
this is what's kinda kept me from adding this on. i just might do this if Power Rev's IM mod falls through.
10-18-2007, 10:58 PM
#6
Blown is Best
Originally Posted by Sun Diego CL-S
it looks like this cat is CARB legal in all states but California.
this is what's kinda kept me from adding this on. i just might do this if Power Rev's IM mod falls through.
this is what's kinda kept me from adding this on. i just might do this if Power Rev's IM mod falls through.
10-18-2007, 11:03 PM
#7
says "hello to my TLX".
Originally Posted by Allout
CARB = California Air Resources Board. It can't be CARB certified and not be legal in California.
this post was from Excelerate in his thread for this catalytic converter.
Originally Posted by Excelerate
Well they are 49 state legal, excluding CA (the 50th state). They are EPA and CARB approved so you should have no issue at all with emissions but RT can't technically say they are legal in the state of CA.
edit: his post is the last of the first page: https://acurazine.com/forums/sponsored-sales-group-buys-10/random-technology-high-flow-cat-sale-tsx-cl-tl-350743/
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10-18-2007, 11:04 PM
#8
Well...it's kinda fast...
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MagnaFlow/CarSound also makes a direct fit high flow cat for the CL that's 50 state legal. I have the 49 state legal version (about $100 cheaper) and noticed nothing but gains. Plus the inlet/outlet size is 2.25" as opposed to RT's 2" inlet/outlet.
Still not sold on the Apexi unit on a NA motor, although +5hp isn't bad at all.
Still not sold on the Apexi unit on a NA motor, although +5hp isn't bad at all.
10-19-2007, 12:30 AM
#10
says "hello to my TLX".
Originally Posted by krisdlm
i forget, but it was either 235 or 240
Acura CL-P 01-03, TL-P 99-03, Honda Accord 3.0L 98-02
- Random Tech $225 shipped; $15 for hardware kit
10-19-2007, 03:00 AM
#11
No cat technically is legal if its high flow and being put on a car thats not 7 years old or older.
What it means is that legally the cat on paper will not pass, but visually and smog it will. I managed to pass smog with it on my car at a CA smog place, they couldn't tell that it was aftermarket and in the end I barely passed, my hydrocarbons were 1ppm off from not passing.
What it means is that legally the cat on paper will not pass, but visually and smog it will. I managed to pass smog with it on my car at a CA smog place, they couldn't tell that it was aftermarket and in the end I barely passed, my hydrocarbons were 1ppm off from not passing.
10-19-2007, 05:51 PM
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Originally Posted by krisdlm
why do the oem cats go for so much?
10-19-2007, 09:16 PM
#14
From my experience with the Magnaflow cats I don't think it's any better then a stock 1. I've gotten few direct fit replacements from them for other cars, & there's been zero difference in performance. They were the same size & fit as the originals.
10-20-2007, 12:02 AM
#16
I thought the cat worked and its sad that my friend sold his car with my cat still on it, I do however think that maybe the inlet and outlet opening size could be bigger then thd 2.0" they copy from stock.
Does anyone remember what size the Comptech header outlet ID was? Is it 2.5"?
Does anyone remember what size the Comptech header outlet ID was? Is it 2.5"?
10-21-2007, 11:41 PM
#22
Well...it's kinda fast...
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^Neither "should", but I've read instances where they have. I haven't had any CEL's as of yet. It's a simple fix if you do get one, though. Just purchase an o2 sensor bypass plug and replace the rear o2 sensor located in the cat (primary is located in the down pipe).
10-21-2007, 11:43 PM
#23
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Originally Posted by krisdlm
if everything goes well with the rt cat, i was thinking about selling the oem cat. How much do they usually go for used?
,but you can be a gypsy and make some ends on it
10-22-2007, 12:35 AM
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Originally Posted by cl8trr
usually free ,but you can be a gypsy and make some ends on it
,but you can be a gypsy and make some ends on it
10-22-2007, 09:27 AM
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so the RT Cat actually makes the car slower then.
10-22-2007, 10:06 AM
#29
Originally Posted by CCColtsicehockey
so the RT Cat actually makes the car slower then.
10-22-2007, 10:19 AM
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Originally Posted by CleanCL
i dont think thats possible, even if you are running aftermarket headers which are funneled through a 2" downpipe, to a 2" RT cat, i think there is more than enough backpressure there. i dynoed almost 220 lb-tq w/ the RT Cat on an auto AND my A/F wasn't right, so there is probably more power to be made.
10-22-2007, 12:44 PM
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Originally Posted by CleanCL
i dont think thats possible, even if you are running aftermarket headers which are funneled through a 2" downpipe, to a 2" RT cat, i think there is more than enough backpressure there. i dynoed almost 220 lb-tq w/ the RT Cat on an auto AND my A/F wasn't right, so there is probably more power to be made.
10-22-2007, 05:46 PM
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Originally Posted by gc86
Keep it kris trust me, my magnaflow hi-flow set off my CEL.
10-22-2007, 06:20 PM
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Originally Posted by INSPIRE 32V
anyone have the exact part number for both magnaflow and RT cat for the Cl and BTW i did a google search but didn't find where i can buy a o2 sensor bypass plug??
10-22-2007, 06:22 PM
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Originally Posted by Accord_V6_400m
Usually RT cats go for $175 used, thats what I was going to sell mine at untill my friend sold the cat I lent him while it was on his car 
10-22-2007, 06:45 PM
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Originally Posted by INSPIRE 32V
anyone have the exact part number for both magnaflow and RT cat for the Cl and BTW i did a google search but didn't find where i can buy a o2 sensor bypass plug??
Magnaflow 49 state version - 27403 (the one I have)
RT - PART# 184-20002
Originally Posted by krisdlm
that definetly worries me a bit
You can buy them on eBay or from performance muffler shops. About $25 or so.
10-22-2007, 07:10 PM
#40
^ thank you very much for the info. now here's the story, my cat went bad and i went to the exhaust shop and had then replace it with a straight pipe. now my car sounds like a civic because i have XS headers and HKS draggers and the resonater removed and also replaced with a straight pipe.
i def need to put some sort of a cat because i can't take it no more. and the CEL IS KILLING ME.
what is a better buy the RT or the MAGNAFLOW and what sounds better.
i def need to put some sort of a cat because i can't take it no more. and the CEL IS KILLING ME.
what is a better buy the RT or the MAGNAFLOW and what sounds better.