Coring Exhausts?
 

Just wondering what peoples opinion is on Coring Exhausts? Anyone had any experience of doing this and any known problems or issues?

I found this site which explains a process:

http://www.ducatisuite.com/superbikemufflers.html

I have a friend who has done it to an Aprillia but he did the whole Core job by putting in a new core of 65mm.

If this was to be done what would the implications be? Is there anyway to control how loud it will be, so as to have it loud enough but not too loud?

Also what about chipping, would it need 45mm open pipe chip?

Thanks

I had my cans cored by Baines racing on my old 996, they set up the fueling for the free flow cans and it ran fine, standard look but you get the proper noise (it was as loud as any race cans)
I don't think I'd go that route again though as you don't have any standard cans to put on if they do clampdown on loud cans or can't find a friendly MOT station, better to buy some second hand cans off the board or ebay (thats what I did this time :) ) also if you do ever sell the bike you have standard cans to put back on and you can sell the race cans on, most dealers won't want a px without standard cans and most private buyers are the same.

Darren

Ah but that's where the wonderful world of the Isle of Man comes in. You can buy bikes from show rooms with Illegal Race Cans on, there's no MOT and the road laws are a lot slacker.

I understand what you're saying though, but for releasing the proper sound for next to no money it must be an idea.

I'd imagine you could always repack them again.

SportbikeS.com-Forums.....How to guide.Step by step guide to coring 748/9.. cans.You could buy a pair of cans S/H,keep the originals intact.The materials needed-perforated pipe and silencer wadding is cheap enough.The common brand name "performance" silencers are ludicrously expensive for what youre actually getting.

Mine have been done along with a JHP chip. Glorious noise, wouldn't know about performance but it certainly sounds louder. I picked up a brand new standard pair off ebay for £46 so if i have any issues i can swap over in about five minutes (its passed three MOT's with the modded cans though)

Thanks for the link, I was thinking the same thing about the branded silencers. I'll probably get some carbon jobbies in the future just for bling factor, but while I'm skint, I thought I'd at least unleash the proper sound of my Duke.

To be honest I don't think many people get cans for the performance, as it doesn't do a great deal to it. Maybe helps it breath a little better. But everyone always thinks it'll give them oodles of power, which it won't. Similarly the thought is the same with full systems. You may gain a little more but the torque will be much further up the rev range, making it even more frustrating in town and maybe seeming like it has less power in those situations.

Supposed to be due to the loss in back pressure, from what I've read.

All manufacturers spend big money designing,testing exhaust systems to work well with the engine and remain within noise regs.A "road"silencer with intricate baffling can be a work of art.The "performance"silencer is a length of perforated pipe wrapped in wadding inside a tube.Very few have been anywhere near a dyno,majority are copies of a "brand" name,which probably didnt do much in the first place.We allow ourselves to be conned into buying products that are associated with performance/racing,a world apart from a road bike.Buy a couple of stickers!

Also mine are now a heck of a lot lighter than the stock cans.

i have cored cans with a JHP chip and i'd agree with the above opinion 100%. lowdown torque is affected and riding at anything less than 20mph is a bit of a pain in the neck. they sound lovely though!

Has anybody here actually done the coring themselves?

This is what I'm considering doing.

I've also found the following link from the above post from aka.eric (thanks for the link).

http://www.sportbikes.com/wwwthreads/showflat.php?Cat=0&Board=howto&Number=236597&page= 0&fpart=1

Also does anybody know where I may be able to source the parts I need, either a coring kit or the bits separately?

Thanks

[Edited on 16-9-2005 by 748IOM]

ive cored my trackday pipes , i used the ducatisuite method but took a bit more care than they when making the hole inthe end. drill round it and open it up with a file, it releases the propper sound and allows much improved gas flow, i run an open pipe chip with this and it runs fine.

i wasnt able to source the perferated tube necessary to go the other method. but if you could always do this in the future if you were unahappy with the ducatisuite method

Bought perforated pipe and wadding from JP Exhausts(excellent firm to deal with)to rebuild a Termi can.
They have a web site,sorry but cant do that highlighted link bit.

OK well I managed to do the Ducati Suite method this weekend and I'm very pleased with the results.

No detrimental changes to the performance on a standard ecu.

Sound is much much louder but still nice and tight, overall gets the thumbs up from me.

Wasn't too difficult to do either, the metal was a bit tough but apart from that all was good.

dont p??s about buy a set of termis take off the carbon/tit/alu. sleeves and replace them with the standard sleeves.

it looks legal sounds great lets it all go at high rpm and only costs the price of a few rivets and no problems with the mot.:devil:

What's the point in that?

If I wanted a standard look I'd just core the exhausts as mentioned above. Be a waste buying termi's and then replacing the sleeves with standard ones (which I doubt would fit anyway!!).

I also doubt you'd pass your MOT with Termi's, they don't just look at the sleeve and think "oh they must be legal then". They do actually (or should do if they're doing their job right), test the db level output at a given rev reading.

I know they're doing such spot checks here on the island, having an e-legal stamp means nothing if it's not within the db limit.