GT4 Zed Posted June 25, 2009 Share Posted June 25, 2009 I was about to commision a custom 3" exhaust system(Race HFC and y-pipe) to match my 3" Fujitsubo legalis y-pipe back exhaust from this custom race exhaust specialist who does all the custom work on evos, scooby, skylines, hondas and also BMW and Audi etc for Alan jeffery engineering in the southwest. He has built a full system (headers back) for a zed with an APS TT Kit so knows what is required for maximum gains sound and durability. Unlike your "joe welder" he trained to do this and builds all his systems from scratch including resonators , mufflers/back boxes etc from T304 stainless steel or high grade where applicable and mandrel bends. Same goes for the flanges, flexipipes and particularly the pre-ordered 100 or 200 cell metal substrate race HFC which are of highest quality. He had quoted £330 for the full 3" y-pipe and £400 for 100 cell race cats (2.5" in and 3" out) but he feels this is an overkill in NA tune, since these HFC's can flow at 99% the flow of a similar sized test pipe and as such maximum gains will be achieved irrespective of it being 2.5" or 3". They will also pass the MOT unlike test pipes thumbs: He has instead proposed making the HFC (2.5" in and out) and the two y-pipe collectors 2.5" into a 3" just like most popular after market kits. In this configuration the y-pipe will cost £275 and the HFC £375 with a 2 year gaurantee However with a decent group buy of at least 3-5 people he will consider less that above as an introductory offer So i am looking for interested takers I will start a list in the following post Note: Personally now, i will order only the custom 100 cell race HFC which is very competitive at that price and but get a K-1 y-pipe from CS or directly from Japspeed at £189 delivered as the only reason i was going to get a custom bullt y-pipe was to match 3" throughout which is an overkill as I now know Quote Link to comment Share on other sites More sharing options...
GT4 Zed Posted June 25, 2009 Author Share Posted June 25, 2009 Here we go 1-GT4 Zed 2- Nurrish 3- Quote Link to comment Share on other sites More sharing options...
GT4 Zed Posted July 3, 2009 Author Share Posted July 3, 2009 bump Quote Link to comment Share on other sites More sharing options...
sunset350z Posted July 3, 2009 Share Posted July 3, 2009 Doing a lot of bumping Bennet Quote Link to comment Share on other sites More sharing options...
maz77 Posted July 4, 2009 Share Posted July 4, 2009 He had quoted £330 for the full 3" y-pipe and £400 for 100 cell race cats (2.5" in and 3" out) but he feels this is an overkill in NA tune does that mean a true dual will be a waste of money? doesn't quite make sense Quote Link to comment Share on other sites More sharing options...
GT4 Zed Posted July 6, 2009 Author Share Posted July 6, 2009 Doing a lot of bumping Bennet got to keep believing Quote Link to comment Share on other sites More sharing options...
sunset350z Posted July 7, 2009 Share Posted July 7, 2009 Are you coming on this mini run on sunday? Quote Link to comment Share on other sites More sharing options...
GT4 Zed Posted July 7, 2009 Author Share Posted July 7, 2009 Are you coming on this mini run on sunday? I'll try. i am working the weekend but i hope to swap shifts to be free. i have been carrying yout Ring sticker since i got back Quote Link to comment Share on other sites More sharing options...
GT4 Zed Posted July 7, 2009 Author Share Posted July 7, 2009 He had quoted £330 for the full 3" y-pipe and £400 for 100 cell race cats (2.5" in and 3" out) but he feels this is an overkill in NA tune does that mean a true dual will be a waste of money? doesn't quite make sense What does'nt make sense Maz? Quote Link to comment Share on other sites More sharing options...
sunset350z Posted July 7, 2009 Share Posted July 7, 2009 Are you coming on this mini run on sunday? I'll try. i am working the weekend but i hope to swap shifts to be free. i have been carrying yout Ring sticker since i got back If i don't see you and this swap goes ahead with Nurrish, i'll leave the grounding kit with him to give to you. Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted July 7, 2009 Share Posted July 7, 2009 He had quoted £330 for the full 3" y-pipe and £400 for 100 cell race cats (2.5" in and 3" out) but he feels this is an overkill in NA tune does that mean a true dual will be a waste of money? doesn't quite make sense i think what he was pointing out is that a cell count that low isn't required with an N/A car as it wouldn't use it. i think a true dual is fine and not a waste of money, but then i have one and am biased. its possible, that if you were to run HFC's as well you may not have as much back pressure as you would like. end result would be loss of low end power so a slower pulling away, but more top end power higher top speed, bit more acceleration above 80mph Quote Link to comment Share on other sites More sharing options...
givememorepower Posted July 7, 2009 Share Posted July 7, 2009 rich tea - Is nos worth having? Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted July 7, 2009 Share Posted July 7, 2009 rich tea - Is nos worth having? depends on what you want it for, there are 2 methods of running it. 1. you have it on a button; when you want a boost you press, and it should give a considerable boost 2. is to run less boost but have it kick in when the car revs to a certain point, almost like a turbo. these are only going form what i remember seeing else where, i've never run NOS so i can't make a fully educated guess, but my answer would be is suppose its worth having if its done right. Quote Link to comment Share on other sites More sharing options...
GT4 Zed Posted July 8, 2009 Author Share Posted July 8, 2009 rich tea - Is nos worth having? depends on what you want it for, there are 2 methods of running it. 1. you have it on a button; when you want a boost you press, and it should give a considerable boost 2. is to run less boost but have it kick in when the car revs to a certain point, almost like a turbo. these are only going form what i remember seeing else where, i've never run NOS so i can't make a fully educated guess, but my answer would be is suppose its worth having if its done right. Mon cher ami, For fuel injected cars you can either run a dry(NOS alone in the intake) system or wet(NOS and fuel in the intake) system which fundermentally is the main difference. There after you can have a multide of delivery systems depending on your application eg progressive systems, rpm based progressive, time based systems etc I personally think that NOS if well executed is the best way to improve performance at a reasonable cost and good reliability and you can choose not to use it until when you need that 50-100bhp shot in the arm so i have always been surprised why people have not taken this route here in the uk. i am making some inquires as we speak and once i have all the info for the zed with costs i will post salut Quote Link to comment Share on other sites More sharing options...
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