Slip on v Full System?

[RossiT]

Hi All

Just a quick question regarding aftermarket exhausts, is there a sound difference between just the slip on's and the full system?

Thanks

[RizzoTheRat]

Depends what your existing system is. If you've got a system with a big collector box where the individual headers join then split agiain to the pipes then yes you might get a difference. If you've got a 2 in to 2 where there's no connection between them then it's going to be pretty much identical to an aftermarket system and it'll all be down to the end cans.

[Carl-H]

Do full systems make much power difference? I don't see how they can apart from being bigger. I understand 2 strokes and that just an end can is useless then

[Rubin215]

Carl-H said:

Do full systems make much power difference? I don't see how they can apart from being bigger. I understand 2 strokes and that just an end can is useless then

It all depends on the original bike and how restrictive the original exhaust set up is; the more restrictive the stock system is (noise and emissions regs) the more likely you are to actually notice the difference.

Good example is the Bandit 1200 where a one hundred quid end can can give you an instant 10% increase (and even more if some of the owners boasts are to be believed...).

Bad examples are top sports tackle where the manufacturers wring out as much power with a legal system as they can; in this case you can spend over a grand and still get less than a 5% increase.
Are you really going to notice the difference, apart from to your bank balance?

Throw the extra costs of dyno time to set the fuelling up correctly and all in all, you're usually better just buying a faster bike in the first place (preferably one where someone reliable has already forked out the big bucks).

There is always the argument that they save weight, but then you could always eat fewer pies...

[Hooli]

Carl-H said:

Do full systems make much power difference? I don't see how they can apart from being bigger. I understand 2 strokes and that just an end can is useless then

as said above it depends on the bike. another good example when they can is gsx1400, the original downpipes are double skinned so really small inside - about 22mm from memory. mines got a full akro system which has about 36mm downpipes, as you can imagine they breathe a bit bitter with the akro. its given about 23% extra power.

i now await the doubters but its 100bhp stock & had 121bhp before mapping which seemed to show another 3bhp. no print for that as dyno started giving strange figures, i get a free power run when back in the area to confirm output.

[Busamav]

Cans for noise , full system for go,


so long as you get a power commander and get it properly mapped of course , dont rely on the generic maps that you can download .

[pat_y]

Full system is nice, (if you have more money than god), but in all honesty i think the power gains from a full system over just a race can is probably fairly negligable on most modern stuff.
as a previous poster said race downpipes can be very light though.

[YamR1V64motion]

the only time ive ever put a full system on a bike was a 954 Fireblade, it added a proven 11BHP, and sounded amazing when it got higher up the revs too

[gareth h]

Depends a bit where the cat is, my old multistrada made a big improvment anging headers because thats where the cat was, Tuono has cat in the tailpipes and that is where the big gain is.