this is a custom jotech/HKS turbo exhaust, 3in piping all the way, i was gonna go with the evo2 from greddy, I had this built, instead i believe it has less or no back pressure. There WAS another Z with this exhaust "micheal stewart" some of yall know him, well he sold the Z to some guy in virginia and it got parted out, or totaled or something, So i believe i have the only exhaust like this! The first are of the greddy evo2, look at the X pipe, and the rest of the system, there is still alot of back pressure




now here is my exhaust, check out the down pipe, instead of an "x" pipe exhaust its a "y"
test pipes custom


now the muffler is a HKS 3in piping all the way

my car on the lift

another shot, has the "JDM" flip touch

shot of the car on the ground

my car sounds like a freakin supra,
www.jotechracing.com

 

hey boosted, nice welds and work. Can they make you a true dual 3 inch? That is really what you need for zero back pressure at high boost...or 2.5 inch true dual for lower boost (sub 10psi)

 

How long did it take them to fab that up? I wonder how much they'd charge for a true 3" dual.

 

well, they said i didnt need the dual, it has more flow this way, because of the welds on the downpipe connect right at the Y pipe and go straight out, it took them a day and a half, theyd say you wouldnt need a dual, i actually wanted a dual instead, but Kenny tran showed me the difference on a dyno, this one flows alot more, im sure they would make a dual if you wanted, i got a good price, an cannot disclose it, because all my work has been done by jotech i get a big discount, but a custom one like that dual or not would run around 1500.00...heres a soundlink
www.boostedz33.neptune.com
its good for only 3 days, click entersite , then click on untitled album....its a brand new exhaust so the smoke you see is all the garbage being shot out and burned

 

I'm not sure how one 3" pipe flows more than two 3" pipes though. But it looks really nice, they did a good job.

 

this is a quote from kenny tran"when your FI, with this kind of set-up, it doesnt matter, because its combinding the pipes at the center, and its a straight shot out"...ill show the dyno result when i get everything tuned...look at the evo x pipe, its goes 2 3in pipes into 1 than back to 2 3in pipes, see the difference, so the evo2 is actually blocking flow right there

 

I'm sure he knows more than me about exhaust design haha.

 

I know Kenny Tran has built some hella fast cars...but honestly...this makes no sense at all.

When you join the pipes, you increase backpressure, and restrict flow. You will get improved flow with two independent 3 inch pipes...that is an indisputable fact. Unless you hook up a pressure gauge, there is no way to know for sure if any exhuast is "Zero back pressure".

 

thats what i told him, he said "just trust me", i wasnt even trying to be cheap, i said to 2 3in pipes he said "waist of money", either way im happy, plus its different, ill link him to this, see what he has to say...thanks sharif

 

Absolutely correct.

James

 

im sure theres some, but not as much as a greddy evo2, thats what i was going to get

 

Thats for sure...the Evo2 is one of the most restrictive exhuasts for TT setups. I am sure your exhuast is fine..and it looks really nice and unique to. Even a true dual 3 inch will have its limits. The idea is to find an exhuast size and strategy that achieves as close to zero backpressure as possible, for a given boost and operating range. 3 inch true dual might be overkill for 11psi, but might be too restrictive for a large turbo setup...running 25psi of boost.

Without a pressure probe, its impossible to know for sure. I imagine APS did their homework with their upcoming true dual 3 inch...right Peter..er...I meant James!

 

I think I saw this same exhaust on Skidazzles' twin turbo DB Z which he sold. I saw it at an Evolution meet in Chantilly, VA. Man that thing was loud as hell. Car was running like 465rwhp I think.

 

yup that the car

 

With the Part's from the Original - KT can make two exhaust systems out of one.

Yes the Original X pipe was the restricting part. The custom exhaust is very nice.. On my old 280ZXT's a little back pressure actually helped "Butt Dyno" performance.

Let us know, how the testing goes..

Cheers Amy -

 

i will, im only gonna run 8-9 psi, so i think this exhaust is o.k

 

Jotech did this for skidazzle's car years ago..nothing crazy.

And whats up with 2-3 companies releasing an identical exhaust setup? Wow... two pipes and two HKS carbon/ti mufflers. I've had my custom job for a few years now with the same setup (single).

No rocket science here.

 

jotech did skidazzles custom twin, which got sold to a guy in VA, an i resently saw the parts for sale on a z forum, i dont know what hapend to that car

 

So is their any advantage/disadvantage of running 3" dual all the way back with under 10 psi if you plan on building the motor and boosting past 10 sometime in the next year?

BTW, your exhaust looks very well made, hope you like it.

 

gonna be a b1tch getting your car to pass emissions, other than that i think you should b fine