Magnaflow Direct-Fit Catalytic Converter Part#24388
http://images.magnaflow.com/02product/parts/24388.jpg
Does anyone have any experience with this cat? Curious to what the diameter of the piping is and the reliability of the core. I have the rx7store.net high-flow cat but after 4 years my car now stinks and does this now so I need to replace the cat. http://stwww.octanefreaks.com/wp-con...1-1025x640.jpg |
Interesting. You might want to call Magnaflow and ask them about the flow rate of the unit so you can compare it to your rx7store unit.
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Keep blowing massive flames out the tail pipe and you'll BBQ the next cat also. :)
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i would personally recommend that if you use a big brand like Magnaflow, make sure it's a hi-flow cat, and not a typical honeycomb style.
i recently used a 3" universal magnaflow cat, and it cracked down the middle because (i think) of the rotary heat while cruising on the interstate. 99.9% of the cars on the road are piston engines, so i think these typical cats are made for piston engines' relatively cool exhaust (compared to our rotaries). |
I went ahead an ordered it anyways since my focus this year is to simply drive the car on the street whereas previous years I was doing time attack and really needed the power more. I really do need to reduce the smell and smoke more than anything else right now, my wife won't even take a ride with me the way it is :S
Compared to the rx-7 store cat, there appears to be more core volume at least looking from the outside, inner diameter is much smaller at 2.25" versus 2.8" for the rx7store cat, this represents about a 36% reduction in cross sectional area. A few pictures: https://farm6.staticflickr.com/5521/...7a29313a_b.jpg https://farm4.staticflickr.com/3876/...f798d2f0_b.jpg https://farm4.staticflickr.com/3857/...a606a176_b.jpg https://farm6.staticflickr.com/5592/...5f3e63cb_b.jpg https://farm6.staticflickr.com/5570/...92287541_b.jpg https://farm6.staticflickr.com/5538/...f85e40f4_b.jpg |
Originally Posted by jacobcartmill
(Post 11750434)
99.9% of the cars on the road are piston engines, so i think these typical cats are made for piston engines' relatively cool exhaust (compared to our rotaries).
the difference is that the rotary has much stronger exhaust pulses, so its almost literally like hitting the cat with a hammer.
Originally Posted by MIBagentQ
(Post 11755005)
Compared to the rx-7 store cat, there appears to be more core volume at least looking from the outside, inner diameter is much smaller at 2.25" versus 2.8" for the rx7store cat, this represents about a 36% reduction in cross sectional area.
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Originally Posted by j9fd3s
(Post 11755227)
in the 21st century the rotary EGT is about the same as a piston engine, especially with a factory ECU.
the difference is that the rotary has much stronger exhaust pulses, so its almost literally like hitting the cat with a hammer. |
I have a newish cat (+- 50 miles or so) that I use to smog the car, then I take it straight back home and put in my old blown-out Bonez that flows better.
Save yourself a few bucks and keep the new one around for that ONE day. ;) |
Originally Posted by jacobcartmill
(Post 11755468)
i'd be willing to bet the rotary EGTs are hotter both while cruising and while at full throttle.
the newer BMW turbo engines run @1150c at wot (and like 250f coolant, and 300f oil temps), somehow they don't melt cats... |
Late arrival, but I don't know about that magnaflow. If it were a "direct-fit", why undersize the inlet and outlets?
I have Bonez that's likely over 15 yrs old (had the car 11 yrs and it was far from new then). Lost the back half of the matrix this past winter because I dropped the damn thing on the shop floor taking it off for a transmission R & R. Removed all the loose bits and stuck it back on. A little louder, but it still doesn't stink. Probably replace it over the winter....and it's be another Bonez. |
OP, any updates or opinions on this Magnaflow cat?
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I think Magneflow was trying to copy the stock main cat, that's why the pipe diameter is so rinky dinky.
Almost wonder if it would be worth getting that cat and a midpipe and replacing the piping. On a bone stock car, I imagine performance would be similar. Which is the idea here. It's not a performance part, it's a stock replacement. FYI, it's $222 from Amazon. Dale |
Originally Posted by DaleClark
(Post 11839953)
I think Magneflow was trying to copy the stock main cat, that's why the pipe diameter is so rinky dinky.
Almost wonder if it would be worth getting that cat and a midpipe and replacing the piping. On a bone stock car, I imagine performance would be similar. Which is the idea here. It's not a performance part, it's a stock replacement. FYI, it's $222 from Amazon. Dale I would return the Magnaflow ASAP! |
Except most aftermarket cats won't last very long. Those that do aren't all that cheap/inexpensive.
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