Hybrids have entered the chat.

Which is why I’m more so leaning towards a catted DP for the Supra. Don’t want to deal with smell although idk how bad it is/would be. Catless DP so much more cheaper it makes you think about it.

 

All energy in a hybrid comes from gasoline. Not moving in a hybrid means 0mpg just the same as a gas only engine.

 

Plug in hybrids have entered the chat

 

Hilarious come back. And wrong forum.

 

They’re cars!

 

Thanks.

With the engine off is it burning gas?🧐

On the mild hybrid does it still blow cold AC when stopped and engine off? It’s on the X7 but I have yet to experience enough to notice.

 

The battery charge was generated by gas is his point. No engine, no electricity.

Yes mild hybrids will run the AC same as if the engine was running.

 

Oh but come now, corn has that sweet smell! I absolutely love the smell of high test in a high comp engine but I know it's just not a good idea to be around it too much

 

How much of a power difference is high flow catted vs catless?

 

On a 670RWHP 6.8L V8 it was 7, barely noteworthy. Twin 3 inch exhausts with a x pipe at 70% length, I used 4.5 inch dia cats with one per leg right after the long tubes. The gotcha is you CAN melt them if you over fuel

The 100 cell race cats are essentially "invisible" for the most part but they remove near all unpleasantness at idle etc. You get a hint of fuel on a cold start but that's all, under max power I imagine it's worse but you are moving so it doesn't matter. It will never be like your stock setup though, so don't expect that unless you have an old *** car like mine that didn't really have anything going on.

 

I am down to just two cats in my V8. We removed the third cat because of rust and a cracks. Luckily no emissions testing here which was a total scam. (I don’t feel bad)

 

Do you have a CEL?

I don’t particularly care for the raspiness that sometimes you hear from catless. I’m personally not interested in a loud car. Power? Yes. Loud? No thanks. I like the Jekyll and Hyde with the push of a button

The recommended catted DPs are 400 cell and some go with a 200 cell. I don’t have to worry about emissions so catless isn’t an issue. Just more so the smell and rasp. I see a lot of people go catted to catless. Rarely see go catless to catted. I’m torn between the two

The car I track still has a stock exhaust (w/catted DP). I may be missing out on some hp but I’m ok with the sound and performance of stock exhaust.

 

Yes I do. I am sure my O2 sensors are gone.

Mine is perfectly silent. Like it was from day 1

 

The racing DP will come with sensors that turn off the cel.

I'm going to just give you my opinion, don't do it. I have a friend who went with a catless performance DP on his Supra, and it's loud. And yes, very raspy. Not my cup of tea. Good news is, you can revert back

 

No, I have standalone fueling and the stock ECU is set to ignore all emissions codes. It will log them but not throw unless it's a running issue, stock emissions were higher so it will never throw with my 100 cell cats. I like the sound of a built engine, can't fake it and there is nothing like it in terms of how violent and vocal they are! Then again I have a V8 not a raspy 4/6 so I may be biased lol!

D4 TTV8 is on stock ECU and is set to also ignore emissions codes as a reason to throw the light, so is the D4 W12. The 4.0 is very on the edge with 200 cell downpipes of logging or not, 90% of the time it's on the "correct" side of things and won't log, W12 is on stock cats (all 6 of them) for now.