I have after much Looking and complaining about the $ involved in a good exhaust i have decided that I am going to make my own (plus I've been looking for a reason to try my new TIG out) So my Question is who knows anything about the science behind X-pipes. I want one of these because I want a quite car and I want the exhaust flow well . Things I'm after Size of joining hole is it better longer or wide etc Best angles for pipes etc Any help would be great Cheers Scrubber
Shame, shame You buy a thoroughbred and treat it like a hack. The exhaust system is probably the most important performance part on the car, and can make or break every other performance $ you spend. Pay an expert and treat your racehorse with the TLC it deserves. regards Neddey
what make you think im not going to do the job properly. Plus from past experance it is hard to find people willing to take the time to do the kind of job i want the system will be 2 1/2 stainless all mandrel bends with all welding will be perged tig welded ill have metal cats and quality mufflers
This is all theory, I haven't get any research to back it up but it all makes sense from what I've read on exhausts: Well, with the join angle, the smaller angle the better as the air won't have to change direction as much. Hole size, you want to gases to balance out but a bigger hole than needed won't cause harm. Again, it comes down to how much room you have at the area you need to join them. So, low angle + big hole = sexy time!!! Check some of the pics of existing ones to get an idea. There isn't as much to this part of the exhaust as say the dumps, it just needs to be as smooth a path as possible.
thanks for that this is along the lines of what i was thinking now i cant wait to get home and start making it ill post pics when finished
Made one of these When i was playing with my exhaust system years ago. Finished up buying one of the UAS mufflers with the x-pipe built in, been on the car ever since. works well. Have a look in their parts catalogue on their website UAS X SYSTEM CENTRE RESONATOR FOR NISSAN 300ZX DRASTICALLY REDUCES RESONANCE FROM HIGH FLOW EXHAUST SYSTEMS, GASES CROSS OVER INSIDE AND CANCEL OUT AND TUMBLE AND ACCELERATE - NO NEED FOR BALANCE PIPE. DESIGNED BY US SPECIFICALLY FOR THE 300ZX - 45CM LONG AND IT IS AS WIDE AND AS HIGH AS CAN FIT WITHOUT CLEARANCE ISSUES. CAN BE MADE SHORTER IF REQUIRED. AVAILABLE IN TWIN 2.5 INCH OR 3 INCH - MILD OR STAINLESS. 3" STAINLESS STEEL PRICE: $395.00 2.5 INCH MILD STEEL
thanks for that but since I have the bends and the pipe I've talked myself in to making it myself if I can't get it to work I'll go and buy something then Cheers Scrubber
They say the angles and such makes a difference. Hmmm, why don't you copy a proven system and make a jig? Something like this? http://www.topspeedauto.com/ProductCart/pc/viewPrd.asp?idcategory=0&idproduct=1596
http://www.carcraft.com/techarticles/exhaust_system_installation/index.html there is also an article that I am fairy certain I did a like to in a previous post, about a local fabrication and test of an x-pipe - in fact it was about the making of this http://www.surefloexhaust.com.au/xpipe.htm
That's a somewhat uneducated comment... Exhaust isn't overly critical, specially on a TT. I'm going to make my own extractors, and not to save on costs but becuase there is nothing out there that meets my needs... Good work Scrubber on getting out there and trying something for yourself. I agree with vbevan in the respect of small angle, large hole. SHould work fine.
Theres a lot of snake oil sales men out there when it comes to performance exhausts, so I did my own. The mufflers, resonators and tips are from Lukey. The crossover / X-pipe I made myself. I did a lot of searching on the internet and the design I used was surposed to give an extra 5kw's. Its about 200mm in length. The pipe size is 2 1/4" as my Zed is a NA. From everthing if found out,this was about the right size I dyno tested before and after, got an improvement to bottom end and mid range, but on improvement to the top end. It sounded nice too :biggrin:
Hey mate, that looks very nice. Have you considered making these up on request? Hint hint nudge nudge.
Now that is a good looking X Pipe.. if you look at the V8 Supercars, in particular Lowndes when he rolled the HRT car.. the pipe is very simular.. Gonzo makes them like that, and Jet boats are simular..
thank for all the info ill do a bit of reading and then sit down with a grinder and my tig and well see what happens Cheers Scrubber
Thats where the idea came from The guy who did the web site that I found was at the race meeting and took a piccy of it. He went home a did a trial of 2 different lengths, found the 200mm one gave the extra 5kws.
this is excellent http://www.surefloexhaust.com.au/xpipe.htm is there anyone that makes these 200mm x-pipes, and are they 2.5 or 3".......getting 3" all through wouldnt be bad for a 270+rwkw zed, and too loud for the boys in blue?
