I have a new contact who prepares race cars, one being a clio cup car in Hampshire and Id like to get my hands on a cup car exhaust. This i can do, but he tells me (after making a few phone calls) that the whole exhaust including manifold is £925. But, after looking in my engine bay, he says that my 2001 March 172 mk.1 already has the 4-branch manifold. I looked under the cup car and couldnt see a CAT, but he tells me its there? where?! or does the manifold go directly into one? would this exhaust be road legal (they are rather loud!) and would the racing CAT also be legal? Id really like to get this exhaust soon, as the new ECU hes fitted seems to be crying out for one. Thats that group n stage one ECU i was talking about ages ago!
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I have a new contact who prepares race cars, one being a clio cup car in Hampshire and Id like to get my hands on a cup car exhaust. This i can do, but he tells me (after making a few phone calls) that the whole exhaust including manifold is £925. But, after looking in my engine bay, he says that my 2001 March 172 mk.1 already has the 4-branch manifold. I looked under the cup car and couldnt see a CAT, but he tells me its there? where?! or does the manifold go directly into one? would this exhaust be road legal (they are rather loud!) and would the racing CAT also be legal? Id really like to get this exhaust soon, as the new ECU hes fitted seems to be crying out for one. Thats that group n stage one ECU i was talking about ages ago!
is it the magneti marelli ingnition system?
all 172s have the 4 branch tubular manifold.
there is no noise limit foe exhausts on the road, as there is no way of testing them under the same conditions....race cats are legal, you can run without one too if you want. but 900 odd quid is a bit much for a steel exhaust.
I dont know much about the ECU, all I was told was that it was for a group N rally(?) Clio. Its a stage one 732(?) something or other. Ill look for the receipt with the numbers on it etc. Externally, the ECU looks identical to the original one, but some of the numbers are different, i think it says "51" on the outside instead of something else. It has raised the rev limiter to about 7600 rpm (which is handy ) and seems to have changed the torque band a bit. Sometimes it feels faster than normal, sometimes the opposite. The guy who fit it said the regulations for the group n class permitted only weight reduction, suspension change and chip and maybe brakes. I asked the guy if i needed an exhaust and he said not neccessary, and it was supposed to work with the original equipment, standard exhaust(?). When driving it, it seems to strangle at around 6000-7000 rpm and i think it could do with an exhaust!
an exhaust can be too loud
if it is audioably causing a disturbance u can done for this.
just as with have a too loud sound system, unlikely to get done for it but it can be done.
anything after a jplate needs a cat for mot but does it need it to make it legal?
ie put one on for the mot and then take it off
you can take an MOT without a cat, aslong as it passes the emissions test.
There are no rules for noise on the road, but yeah, a cop can give you a ticket which requires you to get the car tested, but you go to a garage, they cant test it (no sound equipment) so its dropped.
My Mate is a MOT trainer and i found out about 3 days ago, as i thought mine was too loud.....106dcbls!
Hi. I suppose so really. They dont look particularly good either - i.e, not stainless steel, but seem to do the job and dont look in yer face which is not what i want. To be honest, i havent seen an exhaust that looks like its supposed to be there on a 172 other than the remus twin pipe jobby. The good thing about the cup exhaust is that it suits the back of the car and is literally, just a pipe - presumably tuned length and gives the correct back pressure(?) Have you thought of cup-speccing your car?
My clio is standard, but development starts next week to make a 200bhp kit for other clios.
The orbisound aint the best no, they dont have to try too hard once commisioned. But i like it, i dont like stainless etc etc, i just want purposeful. and i like a plain 2" end in steel....race stylee.
Its deffo better than magnex though.
i would get the cup exhaust, but at 900 quid!!!
you could get a H&S for 1/2 that!
as far as tunning an exhaust, its just about making use of pulse tunning, which is a black art, there is no mathematics that you can really use. Its mostly trail and error, but the manifold is more important, but its great already.
Back pressure is also misunderstood, there is no correct amount. Less back pressure has a similar effect of increasing valve overlap...handing you more power but less torque..
depends on what you want the car to do...a gain in one area is always a loss in another.
my 250cc 2 stroke race kart wont run below 11,000 rpm, but i never go below that so it doesnt matter.
Thanks Ben for the advice. I really want the car to be less economical with more torque and hp, without sacrificing either! I see what youre saying, but i guess ill go for that exhaust, as i think without the manifold it comes in at £300. Do you know where the CAT goes? because after looking beneath the car i couldnt see one!? is it directly after the exhaust manifold?
previouse cars had a modified airbox. Basically, it was just given a new cold air pipe of the sheilded variety to behind the headlight. used a performance filter, dont think it was green though. If you can, try get an itg filter as they look wicked an lots of race teams use them, they do customones too.
BTW, the jetex sales people just sent me an email saying their exhaust system raised the power from 185 (cliocup spec) to 215!!!!!!!!
do they expect me to believe that, i asked them how...hehe
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