Topic

If any of you have heard my F its a bit on the loud side

with this in mind, I have two exhausts that I have to switch between for track use as the TT is over 105db's

The TT with quads has to come off and the daytona with the fibreglass baffling removed goes on

In all honesty its a bit of a pain, as my back end has to come off too

So I've had a look at ways of reducing the outlets or blanking two off with bolt on/off bits has anyone got any ideas??????

I have seen track cars with little Cherry bomb silencers popped onto the exhaust outlet to pass track level limits. You could pop off the quads and pop on two cherry bombs.

Here's an insert that goes inside the exhaust. This one is dor a bike but you will get the idea

Another idea . It's another insert type.

You could always put the cat back on!

Ha ha The CAT is Still on already!!!!!!!!..lol

As it is now I have two 60mm pipes on each side, the ends of the tails are rolled back in to give the smooth finish,

I don't want to damage them so this is the idea

two discs of metal plate cut slightly smaller than the internal diameter, but bigger than the rolled edge

then cut the centre out about 40mm, so it leaves a 10mm (thickness of the outer band) washer looking type thing, cut totally through one edge so it can be pulled apart like a bit of a spiral, take two small nut/bolts only need to be about 10mm and weld the nut to the plate so that when the bolts are tightened they extend past the outer edge of the spiral washer, the nuts only need putting on one plate

take a length of 40mm pipe about 100mm long, slot the pipe through the big washers one on either end, weld them in place with a slight spiral, remember to put the nuts on an out edge

The pipe should now be able to fit in tail pipe by twisting using the spiral, once in it shouldn't come out without twisting and can be locked in place with the two bolts tightened against the outer edge

What do you reckon???

rough luck wrote: wrote:

Ha ha The CAT is Still on already!!!!!!!!..lol

As it is now I have two 60mm pipes on each side, the ends of the tails are rolled back in to give the smooth finish,

I don't want to damage them so this is the idea

two discs of metal plate cut slightly smaller than the internal diameter, but bigger than the rolled edge

then cut the centre out about 40mm, so it leaves a 10mm (thickness of the outer band) washer looking type thing, cut totally through one edge so it can be pulled apart like a bit of a spiral, take two small nut/bolts only need to be about 10mm and weld the nut to the plate so that when the bolts are tightened they extend past the outer edge of the spiral washer, the nuts only need putting on one plate

take a length of 40mm pipe about 100mm long, slot the pipe through the big washers one on either end, weld them in place with a slight spiral, remember to put the nuts on an out edge

The pipe should now be able to fit in tail pipe by twisting using the spiral, once in it shouldn't come out without twisting and can be locked in place with the two bolts tightened against the outer edge

What do you reckon???

That sounds like it might do the business. Blue Peter rools OK?

Can you mock something up beforehand to see if you get sufficient noise reduction?

david aiketgate wrote: wrote:

rough luck wrote: wrote:

Ha ha The CAT is Still on already!!!!!!!!..lol

As it is now I have two 60mm pipes on each side, the ends of the tails are rolled back in to give the smooth finish,

I don't want to damage them so this is the idea

two discs of metal plate cut slightly smaller than the internal diameter, but bigger than the rolled edge

then cut the centre out about 40mm, so it leaves a 10mm (thickness of the outer band) washer looking type thing, cut totally through one edge so it can be pulled apart like a bit of a spiral, take two small nut/bolts only need to be about 10mm and weld the nut to the plate so that when the bolts are tightened they extend past the outer edge of the spiral washer, the nuts only need putting on one plate

take a length of 40mm pipe about 100mm long, slot the pipe through the big washers one on either end, weld them in place with a slight spiral, remember to put the nuts on an out edge

The pipe should now be able to fit in tail pipe by twisting using the spiral, once in it shouldn't come out without twisting and can be locked in place with the two bolts tightened against the outer edge

What do you reckon???

That sounds like it might do the business. Blue Peter rools OK?

Can you mock something up beforehand to see if you get sufficient noise reduction?

Yeah I could but have to finish the loo roll first....lolol

mines got a TT, and a standard cat... its between 107 and 109db at 4500rpm (depending on air temp)... !!!

fine for airfield days but may need more silencing if Mrs Oz decides to start tracking it...

Ozzy wrote: wrote:

mines got a TT, and a standard cat... its between 107 and 109db at 4500rpm (depending on air temp)... !!!

fine for airfield days but may need more silencing if Mrs Oz decides to start tracking it...

I knew those things were too loud!

last year at Fest TT's were coming in at 95-100 think it was a dodgey db meter

but mine still hit 106.6 and stood side by side I can easy drowd out a standard TT

ZT V8's can in at 114

I hate noisy exhausts.

How about a butterfly valve in each pipe. You could even have actuators and a selector on the dashboard to select the noise level. You know how much you like buttons and actuators.