View Full Version : downpipe exhaust size
il shall be making and fitting a side exit exhaust to my clio/volvo engine the down pipe that il be modding is off a 200sx and is 3 inch il be fiting it to a normal clio exhasut which is about 2 1/2 inches is this going to make a loss in power as i want to fit my silenced decat and maybe cat for mot time also are there any tips ect i can buy to weld onto the end of the pipe ones ive finished it what do you guys do cheers
dizzeeR5
06-02-2010, 23:15
might get a slight bottle necking, but im not sure how much it would effect it proformance wise..
Your using a 3inch 200sx downpipe modded to fit onto your 2 1/2" sidey right?
Can't see a problem with that, most people use a 2 1/2" turbo back system, having the first bit in 3" isn't going to hurt perfromance
yeah will be in 3 inch on the down pipe and il put a reducer in before the cat /decat pipe then it will be in 2 1/2 pipe from there
yeah will be in 3 inch on the down pipe and il put a reducer in before the cat /decat pipe then it will be in 2 1/2 pipe from there
As long as the reducer gives a nice clean flow from 3" to 2 1/2" shouldn't be a problem
yeah its a stepped cone reducer nice and smooth and wont have any steps in it as the 2.5 inch and 3 inch step are next to each other also i may put a flexy joint in too just so theres no pull on the turbo from the exhaust system
u got any piks on what yr down pipe looked like fella
mine ended up like this (see pik)
dont like it tho:(
TrixNFlix
29-03-2010, 19:40
Dave what the feck is that:wasntme:
rs250nut
29-03-2010, 21:09
u got any piks on what yr down pipe looked like fella
mine ended up like this (see pik)
dont like it tho:(
Is that a divided flange, seperating the wastegate flow from exhaust gas?
i know it dont look pretty but its all i could come up with
it works tho an saw me to 223 bhp granted it only lasted 3 days but boy it was quick haha
yeah it a divideing flange.
the waste gate was atmospericly vented.
it has been re made now tho due to false afr readings
and that it was so feking loud
mine does the trick
http://i73.photobucket.com/albums/i212/reevio11/PhonePictures015.jpg
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