de-cat............no difference lol

**hairy31** · 13th August 2011, 22:45

well had a full system fitted to day and removed cat and centre silencer......don;t know why but i must be the only person on here that cant report that it feels faster lol, just my luck

**GazVXLINE170** · 13th August 2011, 22:48

The ECU needs time to adjust and learn that the engine doesn't need to work hard to move the exhaust gases out. I thought the exact same as you, but trust me - it will be more apparent over a few hundred miles.

It's not a massive increase but the engine definitely feels like it can breath easier over the rev range.

**hairy31** · 13th August 2011, 22:51

ah..........thank the lord, thought i'd just wasted 400 notes, cheers gaz

did you notice a better exhaust note with yours,think i need someone to drive mine to see if it sounds any different

**paulvectrac** · 13th August 2011, 22:52

give it time mate mine took a few days when i had my diesel then after that was alot better

**hairy31** · 13th August 2011, 23:04

nice one cheers paul

**GazVXLINE170** · 13th August 2011, 23:05

Hairy, diesels done make much noise really - well in the car anyway. I can hear the turbo spool when I accelerate and also hear it spin down when I lift my foot off of the throttle.

**hairy31** · 13th August 2011, 23:10

Originally Posted by Gazza4

Hairy, diesels done make much noise really - well in the car anyway. I can hear the turbo spool when I accelerate and also hear it spin down when I lift my foot off of the throttle.

yea i know mate.......was just hoping for a little improvement lol, yea i hear mine spool from about 1700 to about 3000..............then i cant hear it anymore for the ****** tractor engine

**GazVXLINE170** · 13th August 2011, 23:15

Mine gives a deep rumble between 2,000-3,000rpm - but you still no it's a diesel as the clattery sound is still there.

The noise will also change, slightly though.

Did you get a system from the turbo to the back of the car - removing Pre-CAT, CAT, centre silencer and rear silencer(s)? Or was it a cat back system?

**paulvectrac** · 13th August 2011, 23:20

mine was the fulll monty on my vectra

**hairy31** · 13th August 2011, 23:30

just decat and then straight through to rear boxes.....does the precat make a bigger difference? also blanked egr three days ago....now that made a difference