Sz 3" dumps and 3" exhaust sound.

SZ 3" dumps + 3" exhaust + xpipe = win for sound.

Its incredible with the window down, when the waste-gates open it sounds like they are venting to atmosphere (but not as ear piercing loud).

Its a nice added bonus, i only noticed it today when i started to wind the engine out.


I want to get a tune, but extra power seems a bit scary atm.
12psi is plenty .

I think i might have to invest in some traction first, my wheel arch's are getting a nice coat of rubber .

18's seem to be the go, but i like my wheels. They were good when the car wasnt fast, no problem at all. Hmm decisions. Im thinking about a set of enkei's RP03's. Or 01's. I like the 01's more but im worried about caliper clearance and the extra price..

 

i have a similar system. tho no X pipe or H pipe. sounds awesome. especially with the magnaflow race muffs

 

I have Enkei RP01 18's, sorry cant tell you offsets etc as they are on the car.

These make the car so much better to drive compared to any other 16" or 17" rims i have had on the car.

Caliper clearance is HUGE on my stock brakes.

One thing i would say is they aren't super tough I have had cracks repaired on them and had them spun to true them up. Big potholes and the like will hurt them. Don't know if this so for other light weight 18" rims.

They weight 9.4 to 10.6 Kg's which doesn't seem that light compared to stock 8.6 Kg.

http://www.wheelweights.net/

I find this hard to believe as when you pick them up they are very light, tyres must make an enormous difference.

 

Really, hmm i think i read that the 01's were race only, maby this is why.

Might have to stick to the 03's.

I just want to get out and drive the car again, but its a risky business. At least with the newrims i can drive the car straight onto the track when i take it down for a tune.

Looks like im going to have to spend a few days in bris .

 

Any chance of a vid? Hmmmm?

MoulaZX

 

AMS mani's.
z1 turbos.
AMS 3" dumps.
100cpi cats.
X pipe.
2.5" in twin out mufflers - straight through.
All piping is 3" Mild Steel.

Ill try and get a video next week.

 

They will go well with the 100 cats which are also race only

 

ahh dude!!! where are the 3" mufflers

 

he has the perfect exhaust for GT28R.. 3" reduced to 2.5"

 

LOL, Im sure the 100cpi cats are legal for our cars.

I just threw the mufflers on from my old system.
Disapointed but they will be changed when i find the cash. Its a low priority atm.

For now its Wheels, Front Bar, Tune, Stereo.
In that order i hope.

But stereo may come earlier.

AND THATS IT.

or is it. hmmmm. Respray? Racing Seats, cage, leader gears, new gearbox, retrim... .. .

I have to fit it all in this year. New years is the cars 'budget' deadline.
I need to start saving for a house.

 

Ooopsy.
ZEDZY, you're talking about 2 different vendors and products. Did you mean AMS all along and just assumed that SZ was an abreviation for them or something?

 

better edit the title of your thread to 'AMS' lol

 

Really? how does it make it better. I always thought the better flowing the better for turbo cars.

If so where should it be reduced to 2.5"?

 

I believe there are plenty of threads that explain the merits of a free flowing exhaust system when it comes to turbo's. Or for that matter, NA's as well. There is a bit of give and take in those applications, most notably higher portential power gains. But those gains are usually not achieved til much further up the rpm band. A place the average person doesn't usually reside. It also means poorer performance in the lower rpm band. Again, there's lots of technically related data towards those ends.
There's also the merits of an exhaust system that delivers good power at lower rpm bands which is achieved by stepping down the exhaust piping diameter gradually through the length of the system. To achieve that, AMS has stepped the piping diameter down right after the high flow resonator on their 3" TP and just before the flange where the catback begins down to 2.5". This also has an added bonus in the fact that today, most Zed owners have some sort of after market catback in place already. Those catbacks are more than likely 2.5" therefore the mating of the two will ensure a good exhaust flow transition. Of course the next stage of step-down will occur in either the H or X pipe (depending if one's applied) or the mufflers themselves. The exhaust pulse requires a certain amount of step-down to ensure that that pulse's speed is maintained through out that pulse cycle due to the cooling effect of the exhaust gases as it travels and the associated slowing down of that exhaust pulse because it is cooling. To maintain that exhaust pulse speed, a step-down process will help in that regard.
Of course this is my own interpretation in layman's terms from the data I've read in the past.

 

I used AMS.

To used to reading SZ on the us forums.

 

do you reckon travelling through a turbine blade would have any effect on pulse?

i thought turbo cars run better with less backpressure, end of story

the turbo is driven by pressure differential

 

theres a reason why the supra boys are running 4and 5 inch piping on there single turbo setups 3" is the small option with the 2jzgte.

no matter what anyone tells you 3" duals make a world of difference, i was running 3" from the turbos to the cats. with 2.5 catback ..

i didnt think there would be a huge difference .. but dual 3" is like the difference between . a virgin and a prostitute!! night and day

 

^^^ I believe I was advocating the merits of a 3" system that steps down later on down the exhaust trail.
I also speculated that it may coincide with the fact a good majority of Zed owners already have a 2.5" catback therefore, having the system step-down to 2.5" just before the catback SEEMS to satisfy both fronts.
Smart thinking of AMS in that regard I'd say.
BTW, I already sport MSP manifolds, AMS 3" super split DP's and AMS 3"-2.5" TP's to a 2.5" catback with LaBree (Sebring) mufflers.

Unedited from 10 June 08

Part II of my exhaust facelift.

Part III