Hey guys I'm looking at buying a cat for my car, these one's from magnaflow boast the best flow rates, are fairly small and are cheap. Anyone had any experience with them, and any reasons why I shouldn't pick one up instead of the regular oval style.
Product ID: 59956 Category: Universal Catalytic Converters-Spun Metallic Substrate High Flow
2.5 " ID 300 cell density Metallic Substrate Universal Catalytic Converter Magnaflow 59956
Description: 2.5" ID ( 4" OD Body) High Flow 300 cell density Metallic Substrate Universal Magnaflow Catalytic Converter 59956. 3" Version flows in the 596 CFM range! Really unleashes any flow barrier in your Catalytic Converter.. 4" compact body for tight fitting areas.. Metallic substrate offers considerable longevity advantage over any ceramic substrate..EPA approved, CARB approval pending..
Thanks!
" To study and not think is a waste. To think and not study is dangerous. "
Here's something I dug up on the internet:
"I asked Jim Justice of Justice Racing Engines to flow test 4 cats for me. The first was the Carsound/Magnaflow 93506 with a 400 cell catalyst, which I use for most 2-1/2" applications, the second cat is what is now known as the "Challenger" cat ( MD's Note: that's not the brandname btw and I didn't show it in this thread because he's not selling it) with a 300 cell catalyst, the third was of a spun bodied 300 cell metal catalyst and fourth was the same spun bodied cat but with the standard 400 cell catalyst.
Jim had to make an adapter to run these on his flow bench and all tests were performed as an intake test, flow being pulled through the cat. Jim told me he switched the flow direction and the numbers were within 1%. He did a baseline run at 28" with just the adapter to get a reference point.
Test conditions were Temp. 62.2-62.5F, Humidity 31.6-32.0%, Bar. 29.74
Cat ... Flow (CFM) @28" % Increase/Decrease in Flow wrt the 93506
Adapter-Baseline : 506 cfm +53.8%
Carsound 93506 : 329 cfm -------
Challenger : 353 cfm +7.3%
Spun Body 400 Cell: 336 cfm +2.1%
Spun Body 300 Cell* : 365 cfm +10.9%
* = Metal Substrate Cat
My thoughts:
Since the "Challenger" cat uses a catalyst (300 cell) with larger holes than the 400 cell Carsound, I expected it to do better. Don Flores at DFE Enterprises also tested these 2 manufacturers but in the 2-1/4" size and also found that the Challenger performed better. Thanks to Don again for those tests.
I was somewhat surprised that the spun bodied cat with the 400 cell catalyst (same as the Carsound) did better, although only 2.1% since the brick size is smaller and therefore has less holes for the exhaust to go through. My conclusion is that it must be due to the spun bodied design. This makes for a nice smooth internal transition, where as the Carsound and the Challenger are the standard stamped steel bodies with 2-1/2" ID nipples inserted in either end and this provides a slight flow obstruction on the outlet side.
The clear winner of the test was the spun bodied 300 cell metal catalyst cat. With almost an 11% improvement over the Cat that I've been selling for over 2 years.
The old 94006 and 94066 cats did show some problems with the matting breaking up and the catalyst coming loose and then breaking up. The 93506 cat has proven to be a great improvement over those 94*** cats. To date I know of only one of my 93506 cats failing and that was on Willard's car which sees it's share of the track.
So it looks like we have 2 more hi flow cats to choose from. But pricing will dictate the path forward.
None are CARB OBDII compliant. Carsound has just started to make one to fit that build but it runs about $80 more than the 93506. I've only sold a couple of those but I sell a bunch of the 93506 to the CA guys. So I can only assume it gets them through the sniff test.
Thanks again to Jim Justice for doing the test for me and the Honda community.
Spun Bodied Cat 300 Cell Internal Honeycomb
vs.
Carsound 93505 2.25 in. 400 Cell Internal Honeycomb
Spun Bodied 2.5 in. Cat
"
Found this on the same website, I know most people here go with the 94xxxx series cats:
"Originally posted by SMSP on Sept. 14/2004
I use Carsound but there are some models within the Carsound line that I wouldn't use. The only 94*** cats I use are the 94106 and 94166 for OBDI and II GSRs 99 and older. The 9400* had some brick failure problems especially, if you were running on the rich side.
For 90% of my sales I use the 93505 (2.25 in.) and 93506(2.5 in.) . I've had one failure in the last 2 years with these and I build alot of these things for my customers and for alot of other shops. If you need the 3 in. OD cat go with a 93509 and mod your tubing to make it fit.
Also, the heat shields can break spot welds so I add 12 more spot welds per side."
Bit more cool stuff on that page
http://www.team-integra.net/sections/articles/showArticle.asp?ArticleID=24
" To study and not think is a waste. To think and not study is dangerous. "
Dave Dunsmoor wrote:"
i have this exact one... not reallt any noticable difference, i like it tho
.
SOLD....
