EOI: New 3" dump pipes

I would be interested but 2.5" would be my preference if it can be done. Ther more clearance I can get the better. The ones I have now are frustratingly low to say the least. See what price you can do Rob and I'll think about commiting then.

 

more pics?

How would they compare to the new SZ Espansion 3" dumps?

 

I have a 2.5" system at the moment, but I'd still be in for a 3" pending price.

 

Yeah have the dreaded CES items. I find it strange that these guys building your engine say a single is better than split. Either they have not done their homework or everything any company who manufacture dump pipes says that a split/divorced wastegate to eliminate turbulance is the way to go have had us all, including Greg Dupree!

BTW, the proposed dumps will be stainless and how far back under floor do they run?

 

Well you know i'm interested Rob but this whole split/single pipe shenanigans has me baffled.

Ben

 

Yeah well as soon as there is a hint of a price and something actually for sale then the forum police would be all over you if it wasen't in the right section hahaha, kidding

 

Single or split

I thought split was better on all if not most applications until we did some back to back test on dyno on a Skyline with a top shelf handmade tig welded non turbulence that could not be made better on a GTS-T. The vehicle had upgraded to HKS GTRS turbo and then swapped to a cheap bell mouth mild steel job and made extra 6rwkw roughly. This was tested by UAS on same car same dyno same day etc. We have not tested on zeds and interesting my mechanics were not surprised and not fans of the split. Main reason is the opening size total is not big enough where it needs it most when air is fastest and hottest and less restriction on turbo cars the better. If you are going for big turbo's and the housing and bolt pattern etc whether 4 bolt or upgrading to 5 bolt the exhaust wheel gets bigger and shoots into a hole that is limited if separate pipe and hits an edge as the hole is not big enough and actually can create turbulence. The best set up is bell mouth with divider like Nismo do on GTR dump pipes. I have twin pipe on mine but will not be doing this again and will be going bell mouth type. For standard turbo's then the separate pipe may be better but the polished stainless Chinese ones are about same pipe size and the opening is actually a fair bit smaller by design and makes stuff all if any gain over factory dump and engine pipes power wise although look good. That is if you like lying under your car much? Don't be surprised if bellmouth 2.5 inch makes more power than 3 inch split pipe even with big turbo's as twin no restriction 2.5 inch will flow a lot of power. Might also make same power with less boost.

 

There is but..

personally I was pretty keen on the SZ 3" dumps which are about the same price. that and I am kinda leaning towards the split style.

thats not to say these dumps arent better or arent good value but yer thats the main reason why I'm not jumping on this one. now fuel setups, thats what im looking at at the moment

 

hehe maybe

Fair enough, hopefully it does go ahead so you can get in on it

In regards to fuel i've been looking at the kit CZP do, its expensive circa US$1900 but it's pretty nice.


300degree Fuel Rails
Nismo/Tomei 740cc 95-96 Fuel Injectors
OEM Injector O-rings and Insulators
95TT MT Wiring harness
94-96 Crank Angle Sensor(CAS).

I need to get a new wiring harness anyway, and I have a series 2 ptu so the advantage of this is all the injector connectors are pre wired for the new style, it doesnt have the excess cables for stuff deleted in the later model zeds which I have removed anyway and it has the s2 ptu connectors. So basically its a neater wiring setup. But of course downside is you have to buy a new CAS which although mine is probably working fine it cant hurt to have a brand spanking new one with the better sealed plug that the later models had.

I'd still like to source the fuel rail and injectors locally as I much rather supporting local workshops (well as local as possible being im in Perth) but yer with my turbo's on their way and the MS manifolds comming shortly there isnt much left for me to do before I need my fuel system setup.

Anyway i'll stop hijacking this thread, i'd love to chat about this sorta stuff if your on msn/icq or via email.

 

Sounds good

Will they be able to provide piping to easily facilitate a parallel setup? E.g. having a V or T split after the regulator and then going into each rail seperately then joing back up again at the end.