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| RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
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| RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
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05-27-2011, 10:46 AM
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#1 |
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87 Mazda Rx-7
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Bonez High Flow Cat
Anyone had any issues with these going bad? I got mine back in December and I have a rattle that sounds like a can of rocks rattling coming from underneath the shifter. I am starting to think that the cat is bad, which makes me mad. Anyone have any other ideas?
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05-27-2011, 10:48 AM
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#2 |
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Mazda Lover
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Its common, the cats melt due to high EGTs. Luckily my magnaflow direct fit is still alive, knock on wood.
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 2004 Mazda6 V6 5-spd - still waiting on money for a motor 1991 Mazda RX7 NA 5-spd - my new DD with 145,000 miles |
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05-27-2011, 10:52 AM
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#3 | |
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87 Mazda Rx-7
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I still have my racing beat presilencer, I just have to get new studs welded into it because one is missing. So would you agree the can of rocks noise could very well be that cat giving up the ghost? |
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06-06-2011, 09:32 AM
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#6 |
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Rotating Assembly
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ours has held up perfectly as well for years now. Unbolt it and shake it. You'll know for sure in 30 minutes or less.
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  90 S5 Vert. JDM Tii with BNR Stage1 turbo. Pineapple Racing street port. Bonez cat-forward. Corksport cat-back with Vibrant UltraQuiet resonator. RTek 2 wZeitronix w/b. HKS EBC. Vis CF Tii hood. 3000GT wing. Ground Control coilover kit with KYB AGX shocks. Red and Black leather RX8 seats. Corksport Odura lip & bumper caps, OEM Tii skirts |
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06-06-2011, 11:37 AM
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#7 | |
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crash auto?fix auto
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Paid through the nose for that part from RX7.com, the 3" version.
Burned up completely and blew oout on the dragon in approx 2000kms. Never again will I put an actual cat on the car. The shell still lives under it though. If you're running the car hard, and don't have an air pump - it will die quickly and make you wish you had your 250+$ back.
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06-06-2011, 12:07 PM
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#8 |
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Mazda Lover
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I have to ask, now that you said it, does the air pump keep the cat alive? I have my air pump installed and working, but i do worry my cat will die before i get any spare money to install a resonated race pipe.
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2004 Mazda6 V6 5-spd - still waiting on money for a motor 1991 Mazda RX7 NA 5-spd - my new DD with 145,000 miles |
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06-06-2011, 12:35 PM
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#9 | |
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PPP-P-P-P-POWER!
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1. Walk through a row of 22", or larger, rims 2. Say you love dubstep 3. ????? 4. PROFIT! Axiomatic: Total cacology. |
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06-06-2011, 07:54 PM
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#10 |
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Rotary Fan in Training
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So is it only the possibility of melting keeping people from keeping cats on their cars? Before a OBX(it was a gift) exhaust goes on Lucy I'm welding a Magnaflow universal 3" in. As polluting as these cars are I don't see the reason in not having one, unless you real and truly have a race car.
BTW, are the stockers monolithic or pellet cats?
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1990 Mazda RX-7 NA; Lucy, after the main antagonist from Elfin Lied. Eventual plans? Something cyberpunk and spicy. |
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06-07-2011, 07:59 AM
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#11 | |
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Sigh.....
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1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles Community Service Manual RotorWiki "Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present." |
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