Catless and the imfamous CEL

[K4fxd]

I don't think there is room for 4 cats in parallel.

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[engineermike]

At one time I had this crazy idea to install wastegates upstream of the cats. They could be actuated by boost just like in a turbo car, and open once you get into boost thereby allowing the hot gas to bypass the cat, lower backpressure, and protect the cat brick from the heat. No, it's not legal by the letter of the law...but no one could argue it's not 99% as good as having cats full time. I eventually decided it was too much effort, complex, and maybe not worth the effort.

 

[5.0_Lojos]

At one time I had this crazy idea to install wastegates upstream of the cats. They could be actuated by boost just like in a turbo car, and open once you get into boost thereby allowing the hot gas to bypass the cat, lower backpressure, and protect the cat brick from the heat. No, it's not legal by the letter of the law...but no one could argue it's not 99% as good as having cats full time. I eventually decided it was too much effort, complex, and maybe not worth the effort.

Pretty Clever though

 

[Rolls]

Did not know this. Shoot, most if not all are trying to get rid of the 2 kitties let alone have or add an additional 2. interesting.

Going catless is illegal and a no starter for a street car. Everyone OEM that makes 800hp with 150,000km warranties can do it, why can't the aftermarket do the same?

 

[K4fxd]

why can't the aftermarket do the same?

It can but no one wants to pay 2k+ for cats that won't melt. OEM cats melt too with multiple passes or road course use.

 

[5.0_Lojos]

It can but no one wants to pay 2k+ for cats that won't melt. OEM cats melt too with multiple passes or road course use.

I apologize in advance for starting a topic that beats a "dead horse" more than once legal, illegal, as it stands with my initial concern (if done correctly and running FI) eliminating the and replacing it with a pitbull is more aggressive and attacks more visicioulsy! I rather have a pitbull than 2, 4 or even 8 (My neighbor Karen has about 6 )

 

[Rolls]

It can but no one wants to pay 2k+ for cats that won't melt. OEM cats melt too with multiple passes or road course use.

I feel like there definitely would be a market for it l. Imagine whipple being able to sell into California and pass with flying colours.

Maybe even an e85 only cal.

 

[Rolls]

There is a huge market for it as you can have 800hp and meet emissions tests legally. Thats the entire Californian market that currently cannot supercharge their 5.0 as they blow cats out so fast.

 

[GR1MxREAPER]

Once you find cats that can handle the power of these FI engines and last then someone will sneak into your yard or garage and use their sawzall and borrow them forever

 

[Rolls]

How do Bugatti and the other supercar oems do it?

 

[engineermike]

How do Bugatti and the other supercar oems do it?

In almost every case they are turbocharged. A lot of heat energy is consumed by the turbine which makes thing far easier on the cat. If you log ecoboost cat temp you find its every hard to get it up past 1400 F while a stock mustang gt hits 1600+ in seconds.

 

[WildHorse]

How do Bugatti and the other supercar oems do it?

and with returnless fuel systems !

 

[engineermike]

and with returnless fuel systems !

What does that have to do with cat temps and failures?

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