[cbourbs]

Originally Posted by drfeelgood

what are you doing at the wheels? Mods?

I'm curious also since I will be running with about the same power as you are since my mods will be the same.

[regnouy37]

Originally Posted by drfeelgood

what are you doing at the wheels? Mods?

667whp and 697 wtq SAE on a Dynojet on a 98 degree day. Flexfuel @ E40, Big Gulp intake, TM ported stock TB, Kooks 2” headers, Heat exchanger upgrade, tune, Corsa X pipe, and a few suspension mods.

[Alain]

Wow. I thought those Green cats from Gesi/Kooks where good to go for our cars. I also watched that video where they said their cats would withstand high temps.

[drfeelgood]

Originally Posted by regnouy37

667whp and 697 wtq SAE on a Dynojet on a 98 degree day. Flexfuel @ E40, Big Gulp intake, TM ported stock TB, Kooks 2” headers, Heat exchanger upgrade, tune, Corsa X pipe, and a few suspension mods.

Nice! I am still leaving some on the table as I'm tuned on 91... but I think I'll be ok.

[Joshinator99]

Originally Posted by Alain

Wow. I thought those Green cats from Gesi/Kooks where good to go for our cars. I also watched that video where they said their cats would withstand high temps.

I’d be interested in seeing the tune and datalog of anyone melting the green cats... I feel like there is more to the story.

[regnouy37]

Originally Posted by Joshinator99

I’d be interested in seeing the tune and datalog of anyone melting the green cats... I feel like there is more to the story.

I’ve been using my same tuner for over ten years with great results, and I can only go with anecdotal evidence. Maybe you can turn your boost up and run at the track with Green Cats to help us dispel any misconceptions you may have. There is only a small percentage of people who actually drive these cars and push them to the limit as intended. Thus, finding what works best and doesn’t. Shoot, what do I know.

[cbourbs]

I just keep coming back to....there are so many cars from factory like Ferrari, McLaren etc... that make more power than a modded zl1 that have cats and are fine. It's got be the temps people are running because they want to run as lean as possible to get the most gains. Maybe if they ran the same AFRs as stock and kept on that COT it wouldn't be a problem??

I'm not a scientist so I could be totally off track.

[regnouy37]

Here is another ZL1 that didn’t do to well with the tree hugging Green Cats.

��


https://youtu.be/2UL3szEXOcQ

[Checkmate1]

I saw that CSP video ^

What a mess! Things like that have me convinced Catless is the only way to make reliable power for Forced Induction cars. The thermal energy expended from our LT4 motors is close to 2000' at full send!

[cbourbs]

Originally Posted by regnouy37

Here is another ZL1 that didn’t do to well with the tree hugging Green Cats.

��


https://youtu.be/2UL3szEXOcQ

I saw that a few days ago....how do the stock headers handle it so well compared to aftermarket? There are lots of cars running stock headers and primary cats with 650whp.

Looks like no aftermarket cats for me

[regnouy37]

Originally Posted by cbourbs

I saw that a few days ago....how do the stock headers handle it so well compared to aftermarket? There are lots of cars running stock headers and primary cats with 650whp.

Looks like no aftermarket cats for me

I believe the stock headers are relatively good under the 670ish or so whp range. However, larger diameter long tubes flow much better and give better mid and top range power.

[Z OH 6]

Originally Posted by Can'tHave2MuchHP

Funny you should bring that up because the reason Dodge stopped at the power they did is because they were melting the cats no matter what they tried. You can look it up. They ended up backing off the power and upped the fuel to save the cats. Every kid with a Hellcat out there immediately does a "Cat delete" on them for a reason, and it picks up a ton of power with a tune because of the pressure.

And I do believe Hellcats eat a lot of cats. No pun intended.

Old post, sorry for bringing this one back from the dead but found this thread in a search and someone else might one day too.

My Hellcat made 892whp SAE which is just over 1K at the crank and it did that through the stock cats and I drove the car for 3 years this way. The cats held up just fine, had them off a few times to inspect them. I don't know if the quality of cats vary from one manufacturer to another but the Hellcat cats are VERY durable.

That being said, GESI cats are also VERY durable and used only on the highest HP builds. Vengeance Racing uses Kooks headers and green cats in most of their packages. If they were a problem, they wouldn't be using them.

[Z OH 6]

Originally Posted by Joshinator99

I’d be interested in seeing the tune and datalog of anyone melting the green cats... I feel like there is more to the story.

Agreed. GESI cats have an outstanding reputation for high HP builds.