Rear Exhaust Box

[FlipFlopGriff]

I keep reading all these posts on people ripping their back boxes open to take all the baffles out and I am interested in improving the noise levels on the Griff. However, am I being really stupid but would it not be as cost effective to have a rear box with no baffling made in s/s and keep the original one as a spare (not sure why yet - maybe picky MOT station or policeman). This would certainly help us as the car is used daily.
Tim, maybe you could comment on prices as the ripping open an rewelding concensus seems to be around the £120 mark.
FFG

[yiw1393]

AFAIK, the system is in one piece of stainless from the 'Y' piece to the back. What you suggest would involve cutting the existing pipe and fitting at least one joint in it. IIRC the exhaust of Chims and Griffs goes from two (each manifold) into one (Y piece) via cats (if fitted )to a single pipe of about 3" diameter into a box of about 15" long and then out into the twin tail pipes.

So, cut the box out and put 2 joins in, or just mod the box? Costs would be more for the swappable box surely?

[Corin Denton]

yiw1393 said:

AFAIK, the system is in one piece of stainless from the 'Y' piece to the back. What you suggest would involve cutting the existing pipe and fitting at least one joint in it. IIRC the exhaust of Chims and Griffs goes from two (each manifold) into one (Y piece) via cats (if fitted )to a single pipe of about 3" diameter into a box of about 15" long and then out into the twin tail pipes. So, cut the box out and put 2 joins in, or just mod the box? Costs would be more for the swappable box surely?

Absolutely correct, I had my exhaust modified by Peninsula in this way cost around £120 but that was a couple of years agao!

[Ballistic Banana]

Offords done the rear box conversion for me, £60 and it sounds Greator If i might say so myself but not quite a De-cat.

Only problem with doing this is you may need inserts?silencers on track days to meet the noise requirements.

BB

[WildfireS3]

So exhatly what is involved when taking out the baffles. In the past when I did minis I just bought a new exhaust, but this doesn't seem to be too cheap for a Tiv.

[Ballistic Banana]

I believe they cut open the Box, Cut the baffles out and weld in two new pipes in there place.
I believe some people have also just cut a small hole and pulled the wading out and welded shut as another alternative.

BB

[yiw1393]

Go for a DE-cat! You know you want to!

Mine's de catted and sounds great, more of a whisky and cigar rumble than a 40 a day Woodbine smoker. Saying that, Corin's car sounds good too!

[Simpo Two]

yiw1393 said:

AFAIK, the system is in one piece of stainless from the 'Y' piece to the back.

Eh? Mine's got a section of flexible metal 'hose' halfway along... (97 Griff)

[oggs]

Ballistic Banana said:

I believe they cut open the Box, Cut the baffles out and weld in two new pipes in there place. BB

That is what has been done to mine and sounds FANTASIC

[tonyrec]

Mine did toooooo

[yiw1393]

Simpo Two said:

yiw1393 said: AFAIK, the system is in one piece of stainless from the 'Y' piece to the back. Eh? Mine's got a section of flexible metal 'hose' halfway along... (97 Griff)

Couldn't say about hairdressers cars mate, only Chims

[john yates]

R.T. Racing! Thats all i have to say about sound

Chimaera S3TAY





>> Edited by john yates on Friday 23 April 20:15

[oggs]

tonyrec said:

Mine did toooooo

Thats why i had mine done

[docevi1]

is de-catting not illegal? I thought all cars after 1993 had to be fitted with a cat by law?

[slikk]

IIRC if the chassis was registered before a certain date, cats are not compulsory, hence you can get away with it on a Chim / Grif (but i am prepared to be shot down here)

[TeGriffic]

Have a word with Green Griff - he's just had it done - to a pre cat.

[Marcos Maniac]

tonyrec said:

Mine did toooooo

It still does mate

ask the neighbours though and you might get a different reply

>> Edited by Marcos Maniac on Friday 23 April 23:32

[schimg]

Mr and Mrs flipflop,

Have a word with Wixer (Phil red griff 500) and me at the next meet or on the WarksTVR forum.

We did mine in January, cost a fiver for a couple of pipes did the rest ourselves. I was given a donor exhaust so have retained the original item.

Phils was done whilst having his upgrade same process as mine.

Sounded really nice tonight on the way to pick up a curry in Radford (Coventry), loads of pops and farts...bit like me later!!!

Steve. G.

[FlipFlopGriff]

Steve,
Thanks.
Should be on the Bristol run on the 16th. I don't want a de cat but would like to make it sound more grunty.
FFG