Smoother on BPU'ish

Since removing the big cat, the 2nd tubby seems to come in earlier, around 3500rpm and is much smoother. No big kick around 4000 that I had before.

Any ideas? is it normal?

Its making over 1bar now without that cat in.

Still pulls well, just no kick, more a steady surge.

Thanks

Yup, it's normal, less back pressure, less restrictive = Quicker spool up:)

Although, you should still get a pretty big kick when numero 2 starts singing, it's alot more noticeable when both cats are out and when the boost is at 1.2 Bar.

Did you put restrictor ring?

Did you put restrictor ring?

You would not need one on a single decat.

No, dont need it. I've got one though ready for when I take the other cat off.

I'm sorry, I missread, - tought you removed first some time ago and now removed second one

both my cats are out and yet I still get the big kick at 4000

I get a massive kick at 3800-4000 when 2nd comes in - always makes me lose grip if I have my foot even slightly pushed down too far, so traction control is always off!!

Also, the exhaust note is noticibly different - its louder, sportier and has more of a "whooshing" sound.

I went from 1bar to 1.2 and thought that it would be just a little faster but boy was I wromg!! Much much faster!!