Roosy Posted July 2, 2011 Share Posted July 2, 2011 Would anyone one be able to help me by giving me a rough estimate in costs for a complete custom exhaust system for my UK N/A starlet and who would be best to go to?Also would I gain more bhp by customising an exhaust system such as japspeed for the glanza to fit my N/A or would a custom be roughly the same?Thanks for any help guys, Joe Quote Link to post Share on other sites
fattony Posted July 2, 2011 Share Posted July 2, 2011 no point trying to mod a turbo exhaust on as i would have thought the bore would be far to big for the n/a engine, just get yourself an after market rear can welded on by an exhaust place dudeyou will see barely any noticeable gains performance wise from a cat back system anyway on this engine unfortunatelythats just my ten pence obviously, if you wanna spend the money on a custom system there are a few places around like powerflow etc, but i imagine the price would still be like £250 plus Quote Link to post Share on other sites
hill_bill10 Posted July 2, 2011 Share Posted July 2, 2011 improving the manifold system to a 4 branch one can help to push bhp up, like said a cat back would make much difference, just make it sound better.and as said it can cost over £250 - £300 Quote Link to post Share on other sites
Roosy Posted July 2, 2011 Author Share Posted July 2, 2011 Ahhh thanks Tony I just thought if I was going to pay £100 or so extra to insure an exhaust system I may swell go for as much power as possible ha so just welding a back box onto my current exhaust system would be just as good? That would save a load of money too Quote Link to post Share on other sites
fattony Posted July 2, 2011 Share Posted July 2, 2011 well thats my take on it, ive owned alot of n/a and turbo cars, and the only way to get proper gains on an n/a engine is to go the full hog and go proper four branch and full system, on my old xr2 (1.6 8v petrol cvh n/a , incase you didnt know engine type) we rolling roaded the car alot after doing different mods and after fitting the full system and 4 branch the car hit 127.9bhp but dont be mistaken into thinking that an exhaust did all that!!! before the exhaust the car made 122.3bhp, but i had done alot of other engine bits to get that kind of power!for the starlet im just gonna get myself an ebay back box (want a 3" pipe but the smallest i can find slash cut is 3.5") for about £30 to £40 and i will just weld it on myself out the front!primarily my reason for doing a diy exit is so i can move the back box as close to the underside of the car as possible and do a custom exit through the bumper, not to look cool but to save me ripping it off on the mountains sorry i meant speed humps in my area that i told you about!im gonna look into it when i get back in a few weeks!even increasing back box exit diameter alone you might end up losing 1 - 2 mph off your top end due to loss of back pressure on a n/a , but then who cares........ how often have you had your n/a off the clock??? Quote Link to post Share on other sites
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