Hes talkin about the Stillen High Flow Air-Box matched up with a Z-Tube. He has an Injen SES exhaust.

 

Ive posted this several times , and here it goes again

I have the Stillen dual exhaust . I had on RT cats and gutted RT's . My car made 7.5 psi [ something in that range ] and made 350whp . I put on Crawford cats and my boost went to 9.2psi and I lost power and I had to retune to get back what I lost and that was done with mostly less timing. So back preasure isnt going to get you any thing [ well a little trq. down low , very little ] But you can run less boost and make more WHP with less backpreasure

 

exactly, most people here get it backwards

 

^ awesome great to know...

Like I said before... I could replace the injen ses exhaust, im not a huge fan of the rasp... but if having an open flowing exhaust isn't gunna bring me down... F that I'll put that money into injectors and new pullies mang.

 

So you're saying you get all your power at lower boost levels with better breathing mods. But then why is it that people don't usually run test pipes with a S/C?

 

cause it's loud as freakin hell

my car with high flow cats is damn loud enough

you can get a ticket for noise, and they're not legal so you can run into some hassle with using them. I'd probably use them on a turbo for sure though

 

Yes, same or better power (horsepower with potential to lose a few pounds of torque) at lower boost. When tuned properly this equates to a safer setup as there is less boost pressure in the manifold. My car was originally built in California so the HF cats were a requirement for CA emissions. The HF cats provide considerable flow improvement over stock though.

My car is making 366/300 at the wheels at just under 6psi peak. This was the measurement at the MAF sensor through the SS piggyback ECU. I could go with a smaller pulley for the supercharger to make more boost but the stock injectors will not push enough fuel (to be safe). The way I look at it, I am making more than "stock" Vortech power with a safer tune.

 

^ That sounds like the way to go

Stillen verses Vortech.. Is the vortech's numbers going to able to beat a stillens flat torque curve?

I would think so.

I'm not a huge fan of the hood either... that seems like it'd be a hell of a hassle.

 

my numbers do.

my car isn't finished - need 550 injectors as 440's aren't enough. It's basically making about +/- 450whp or so on a dynojet without any real tuning yet (just safe A/F for now)

It's a good 30whp and 25 tq higher at 2500 rpms than a stillen stage 3. I'm not sure about below 2500 rpms, but I honestly don't cruise much below 2500 rpms - maybe 2000 at the lowest because of my clutch and 3.9 gears. That's another thing, 3.9 gears give you gear tq so picture having the car feeling like it has 10% more tq

I do have cams, but am only using the 3.12 pulley. You can subsitute the 2.87 pulley instead of cams and get probably about the same results

 

Stillen vs. Vortech has been a long standing controversy around here. Check out the threads "Stillen vs Vortech. Pro's and Con's" and "Thinking of going Stillen S/C" for a lot of opinions from both sides.

 

^ Thanks to both of you, great threads.

I was considering cams, but they are so expensive! If I can get better or same results from 550 injectors with a 2.87 pulley, I'm doing that.

450 is a great number! I've always thought about doing the 3.9 final drive, but I do use cruise control... and I still want this car to feel like a daily driver.

As for stillen, The numbers dont impress me, and when you slam the throttle you are already at 2000ish RPMS... I saw an F/I round up a few months back on the coupe forums and (even tho the cars weren't the same) the vortech beat even TT set-ups.

Between the good deals you can find on the forums for a kit, the saftey of the kit, the freakin awesome numbers of the kit, and the kit comes with a BOV =)

I think I'm sold on vortech...

I'll buy the kit (when I find a good deal) In a month or two (two at the latest) Have it installed on the 2nd or 3rd month. Then save up for injectors pullies and gearing if I didn't find that in a kit already.

Thanks ya'll you are all a huge help!

*Big grin over spending to much money*

 

cruise control works with the 3.9 and IMO is GREAT if you have some decent tires

that rumor has to stop. My car works with cruise control fine and so do many other cars with it


when you hear the vortech BOV for the first time at WOT...well lets just say it's pretty freakin cool - more aggressive sounding than almost all FI kits for the Z other than the greddy



there are downsides to using the 2.87 pulley vs cams though. The blower spins faster which means the intake charge is slightly higher in temp and the blower gets worn out a little more.

With cams, the intake temp stays where it was and it lets the air in and out of the engine better - less friction, less heat, but more power (so more heat anyway as a result, but still)

 

Well a set of cams runs from 700 if your lucky to over 1k if you suck at life.

How much is a new pulley?

 

what is the % of Vortech making that annoying gurgling sound on Idle? That is the only thing that is holding me with Vortech.

 

^ good question... I'll just get an idle raise if it happens to me...

I'm normally pretty unlucky with that stuff... My SES exhaust rattled like a bitch...

One day it just went away tho =)... at least there is an easy fix for '04's =)