Pop and bang?

[c7mct]

Having a 4.5 with a sports exhaust I love the popping and banging on overrun. I find myself driving round in 2nd or 3rd at about 3k revs constantly letting the engine decelerate the car to create this fantastic exhaust note. Can letting the engine decelerate the car damage the engine?

[faisalkhan]

At those revs, it won't harm the engine at all! Great fun, isn't it?

[granville]

Congrats; nowt sounds quite this good! BUT - make it even wilder bt de-catting.

Remember, all men play on 10!

[gadget9]

Snap i do the same thing how sad is that but i just cant help myself the sports exhaust on my 4.5 sound like heaven banging and poping its even better under bridges and car alarms can be set off in car parks
Great fun

[loon]

I have to do it every time I drive the car!! very addictive isn"t it..

[bennno]

did it all the time on my first 4.2 but after a while one of the cat canisters exploded.

not sure if it was related, perhaps somebody can confirm that the pop and bangs are unburnt fuel in the exhaust - and if this means the cat is taking a pasting??

Bennno

[c7mct]

looks like its lots more popping and banging, has anybody notice that the longer you have to wait for the bang -- the louder it is!!!!!!.

[granville]

The best thing with my Cerb was the way it quite literally exploded into life; it was like a shotgun going off! It HAD to have been illegal.

Bleedin marvellous. I wonder, can you get the same sort of effect from Tuscans?

[davidd]

bennno said: did it all the time on my first 4.2 but after a while one of the cat canisters exploded.

not sure if it was related, perhaps somebody can confirm that the pop and bangs are unburnt fuel in the exhaust - and if this means the cat is taking a pasting??

Bennno

Yes that is about the size of it, unburnt fuel in the hot exhaust. The easy thing to do is to take the cats out, £90 for the new pipes and about 20 mins if you have ramps. The car sounds awesome, at low RPM it is nearly as it was but a little deeper but when you are giving it some revs, it is like two very big motorbikes on full bore, and the overrun

D.

[exocet]

Bennno

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Yes that is about the size of it, unburnt fuel in the hot exhaust. The easy thing to do is to take the cats out, £90 for the new pipes and about 20 mins if you have ramps. The car sounds awesome, at low RPM it is nearly as it was but a little deeper but when you are giving it some revs, it is like two very big motorbikes on full bore, and the overrun

D.

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Where can you get the bypass pipes from, and how easy are they to fit? Is it really a 20 min job, or will it involve lots of swearing and bleeding knuckles trying to get the cats out ??

Jo

[davidd]

exocet said:
Where can you get the bypass pipes from, and how easy are they to fit? Is it really a 20 min job, or will it involve lots of swearing and bleeding knuckles trying to get the cats out ??

Jo

I think Jools does them for about £90, you will need ramps as they are a long way under the car. There are 4 bolts to get each cat off. I must admit I paid tyreservices £20 cash to do mine as I don't have a garage at the moment and it was raining.

Give Jools a call, you need to take a look at your current cats to make sure you get the correct ones.

Cheers

D

[exocet]

Cheers David, may well give Joolz a call, he knows my car anyway. Thanks for the info.

Jo

[tbloke99]

Got my cat replacement pipes from Joolz for £90 plus delivery.
Really did only take bout 30 minutes to fit, did it over a pit so it was easy to get to.
The car sounds different again, and the noise when you get above 4000 revs is great.
Well worth the money and time spent! Nice one Joolz.

[leszekg]

Sounds great but do you have to get the cats put back in for the MOT every year and taken out again after? The thought of this extra hassle has put me off so far.

[tbloke99]

I've got two years until the first MOT so I've sort of forgotten about the Cat's for a while