[Jimmy Ram]

Do you have to delete cats in order to run in the 9s

 

[Unavowed]

I've gone 9's in my G8 through ARH cats. I now have Kooks Green cats on it which supposedly flow better. Not a Hellcat, but it can be done. The Demon can do it through o.e. cats.

 

[DemonSRT]

Do you have to delete cats in order to run in the 9s

I ran 9's in my Demon with them but have deleted them now.

 

[Blkout]

Lots of Hellcats running 9s with the cats.

 

[dragrcr]

Stock Demon : Cake.

 

[SickToo]

 

[Big Swede]

They don’t restrict flow much at all. The reason it’s a little more rare is some of the race fuel that the faster cars use will kill the cats.

 

[Linda's Hell Cat]

Cat Delete is needed when you want to run race gas and is how I was running 9's in my Hellcat Charger for Q16.
My Hellcat has a couple of different Tunes and I change pulley sizes.

I now have the AWE Track edition installed.

Dodge - Challenger - SRT Hellcat, Demon, Redeye, Widebody & Super Stock - Exhaust Systems - Catbacks - Page 1 - High Horse Performance, Inc.

highhorseperformance.com

Linda

 

[Jimmy Ram]

They don’t restrict flow much at all. The reason it’s a little more rare is some of the race fuel that the faster cars use will kill the cats.

I don't care about race fuel .drive my car on the street .when I race use 93 oct plus a little boostane to make sure its at least 93. Thanks for your advice.

 

[Unavowed]

3" Kooks GREENCATS Catalytic Converter 7" Long Certified to EPA Standards | Kooks Headers & Exhaust

3" Kooks GREEN Headers are one of the top performance parts added to vehicles. Kooks Headers improves your vehicles exhaust performance instantly.

kooksheaders.com

 

[JP9]

I run cats with unleaded VP MS 109 fuel and am in the 9’s. All tuners I have spoken with have said that any leaded fuel like a Q16 or C16 is not recommended for use with cats.

 

[SickToo]

Hi flow cats are lame. I ended up w cel’s on every street car I have ever ran them on. None of which would pass cali emissions test with them installed. If I gotta buy my smog certs why would I spend $700 on something that negatively effects flow and makes it so I can’t run leaded fuel?

School me… what am I missing here?

 

[Blkout]

Hi flow cats are lame. I ended up w cel’s on every street car I have ever ran them on. None of which would pass cali emissions test with them installed. If I gotta buy my smog certs why would I spend $700 on something that negatively effects flow and makes it so I can’t run leaded fuel?

School me… what am I missing here?

They don't typically pass emissions but some people prefer to run them over off-road pipes for the decrease in volume.

 

[SickToo]

That’s what turbochargers are for : )

 

[fumanchu182]

@Jimmy Ram 9.66 at 141 with the cats on.

 

[Unavowed]

That’s what turbochargers are for : )

I have both turbos and Kooks Green cats on my G8. Turbos quiet things slightly, but are hardly mufflers. The cats also help cut down on the noxious smell from the exhaust. And don't think E85 makes it smell that much better. Catless E85 cars smell bad too, just different.
My street exhaust is turbos to green cats to a X pipe to fairly restrictive but quiet mufflers. For the dyno and track I drop the mufflers.

 

[SickToo]

Ohhhh yeah that yummy catalytic converter smell lol

VP C44 smells damn near l like perfume coming outta the collector…

Too bad it’s $50+ per gallon

 

[Jimmy Ram]

I ran 9's in my Demon with them but have deleted them now.

I ran 9's in my Demon with them but have deleted them now.

You ran 9.2 with cats on .What type fuel.

 

[DemonSRT]

You ran 9.2 with cats on .What type fuel.

I had the cats off when I did the 9.2 run on MS109.

 

[davemvegas]

I don't care about race fuel .drive my car on the street .when I race use 93 oct plus a little boostane to make sure its at least 93. Thanks for your advice.

To run 9's at full weight you have to add boost. Can't add much boost on 93 oct. Cats are not stopping you from running in the 9's. More HP is needed. Basic 9 sec recipe, 2.85 upper pulley, 10% od ATI Balancer, either ID1050 or ID1300x injectors, Upgraded fuel pumps if your car is not a Redeye, E85, Satera Tuning tune, Tune can be done remotely.