Most exhaust are proven to give you a 20 hp increase when you go turbo

 

Is that right... Like seriously, does it really make a difference? You have a Downpipe, S-pipe, and Exhaust. It's not one gigantic tube. When the exhaust is uninhibited, they are ALL Turbo back exhaust. No matter if you started with an HKS axle back. If you replace the mid-pipe, replace the S-pipe, and have a turbo. Your once HKS axle back now just became a full turbo back exhaust.

 

Before you try and mislead them.. i would suggest atleast read there website before your a pro at there exhaust systems:

http://www.dezod.com/pd_dezod_motors..._spipeback.cfm

Dezod Motorsports 2.5" S-Pipe-Back Stainless Steel Turbo Exhaust System-tC 05+
Your Price: $630.00

Serial Number: 5125005

http://www.dezod.com/pd_dezod_motors..._stainless.cfm

Dezod Motorsports N/A Stainless Steel S-Pipe-Back Exhaust System-tC 05+
Your Price: $564.00

 

Well, with the zpi, you would have to add the S-Pipe since the ZPI kit does not come with an S-pipe.
However, since the dezod does come with a 2.5' down/S-pipe, rhythm is correct that any 2.5 cat back would be 2.5 turbo back.
Honestly, If I were you, I'd just stick with the stock exhaust for now, and when you start building up for more power, THEN go to a 3 inch all the way back. You'll want a 3 inch down pipe and spipe then anyways.

 

I just tried a few pulls without the filter and I think it actually helped. I think the boost may have dropped 0.25 to 0.5 psi, but no more than that. When I put the filter back on I was losing 1 psi - 1.5 psi. This means I need to shorten my intake pipe? The one with the actual filter on it?

This definitely makes sense but I am almost positive there are no boost leaks - I just checked again.

Here are the pics/dyno pull...

 

Why is your pipe backwards?

They are usually installed/routed like below...

 

ZPI's exhaust system does come with a S-Pipe I presume, because I ordered it! LOL

 

[quote="hmflinttc"]

[quote]

The Defi gauges are so sick dude. I have them, haven't put them on yet tho.

 

^ just wondering that myself...

also 14.9 AFR...isnt that a little to much?

 

Thats idle. its fine

 

It took us almost 4 hrs to get that intercooler piping figured out - and I must have looked at 30 different ZPI kits on the forums haha. The angle that the outlet on the turbo comes off at makes it impossible to run it this way. It looks like my turbo is spun slightly more counter-clockwise for some reason. It was prettystandard05's kit originally - but I bought it from haiduy - he said that the first owner ran it this way because he was losing boost? And as for the A/F ratio - my motor wasn't running.

 

I think thats a "2" not a "4", as in 12.9 AFR.

 

I'm really not sure of how bad your vision is...but that's definitely a 4 (four) yeah.

But who cares, that's idle, it's okay.

 

That is definitely a first in seeing the piping positioned like that.

 

I'm looking at the graph bro. Just figured out you guys were looking at the gauge, which is no way to judge the A/F ratio based on a pic. At any given time, you can take a pic and the gauge might show 15.2 or 13.8, depending on what the car is doing at the exact moment you snapped the pic.

 

Well, I kind of came to the conclusion that the car was idling, since he said it. :-)

 

Why didnt you just clock the turbo? Easy fix.

 

Sorry about my post about the exhaust. I thought this was 20tcDudes thread. I was trying to follow that piping as well, cause it didn't look like any of the other zpi kits I've seen.
Did you try clocking the turbo?

 

u still shouldnt be loosin and boost .and it u had a leak it would constantly drop will more pressure .......i pushed 320whp with my dyno and tune but i do have a lil bit more goodies and pushin 12psi but anyways back to the question usually the reason it rises and drops like that is the valve duty in the waste gate which u can control with a boost controller a really good one i got a 5 stage apexi avc-r it also could be the springs not broke in yet thats usually just take the wastegate apart and break it in by hand

 

Yea we thought about clocking the turbo - is there any way that could stop the boost from dropping? I just don't understand why running the pipes like that would cause the boost to drop that bad.

And I'm thinking that avc-r boost controller might be the way to go - the guy that helped me put it in said hes run the avc-r on all his cars. The wastegate spring is broken in because that one was used in my friend's supra.

When I first got the kit it had a 7lb. spring and the boost didn't move. I really think that a new exhaust will reduce the boost drop. The Megan exhaust I have now is routed just like the stock one - the air flow hits the back of the muffler and has to make a 90 degree turn. I just don't think this exhaust can move the air needed to run 9 psi at redline. Hopefully its that easy haha