Well the kit is finally installed and it looks and drives great. I took it to get the Emanage tuned yesterday with some dissappointing but promising results...

It put down 210 whp and 240 ft/lbs of torque on a Mustang dyno. Apparently this dyno comes out about 15% lower than a Dynojet (so I've heard), so I guess I've got around 240 whp and 275 ft/lbs torque at the wheels. I ran it at about 8.6 lbs. of boost - but for some reason the boost kept dropping by 1 lb. to 1.5 lbs. at redline. Does anybody know what could cause this? I'm running off the wastegate only - no boost controller.

Also, I have the Megan OE-RS catback right now - which I think may have caused the low whp numbers and the high torque numbers, and possibly the boost problem. Do you think I will see higher whp numbers with a freer flowing exhaust? Ideally I would like to switch the whp and torque numbers. I'm thinking about the Tsudo N1 because it looks like it will flow and its cheap haha. I don't think noise will be a problem - you can't hear any exhaust sound on my car right now. Thanks for the help - I'll post pics and dyno sheets soon.

 

Congradulations!
Love to see the dyno sheet!
what gauges you running? And what did the tuner say about the loss of boost pressure?
Happy Boosting!

 

240 @ 8 lbs...shouldn't be about 30HP more than that??
If money isn't a problem and you want a bad @$$ exhaust system for your turbo, the Dezod turbo exhaust is Dyno proven to give 20 - 30WHP.

 

The ZPI is pretty nasty too, one of the turbo tc guys I know has it.

 

Yeah, it's just that 3" is complete overkill for anything under 350 - 400WHP...and no one wants to pay that much money for that...

 

your #'s are very low. i dyoned mine on a mustang @ 8psi and made 240ish. deffinetly get an exhaust. about the boost loss, try taking off your air filter and see if it helps.

 

The Mustang Dyno could have been set up differently or something, dunno.

Brett, I am getting a 3" ZPI exhaust system, even tho I will be running 275WHP-300WHP at first, I will plan on building the block. So, the only beneficial gain is faster spool up and maybe a few more WHP from it or so? I don't want to spend the money on a 2.5" and then go up to a 3". I rather get a 3" while I'm at it.

 

If your plans are to got for over 350ishWHP then I suppose the 3" is worth the money, other than that it's a waist.

 

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Yea, it doesn't come with a muffler.

Well, yea, it does, but it won't be on it, so if it's too loud with the turbo, I'll get the muffler shop to put it in. Yea, I plan on going big numbers as you can see my plans. I already got the bottom end parts picked out. Stage 2 should be about a good $4,000 to get going.

 

yeah, if your plans are to get to that 450WHP, then the 3" Exhaust will come in handy.

 

or just get a cutout. there are electronically controlled ones that will open and close with the push of a button. on daily driving, have it closed and quiet. when having a little fun, have it open for max performance.

 

Yea I think I asked you where you got your car tuned a while ago. I ended up going to Japtrix - so we were on the exact same dyno. I feel like the numbers are very low too - I really hope I'm able to get them where they should be. Unfortunately there's not much I can do other than get a better exahaust and go from there. What exhaust did you have when you pulled 240 at 8psi? And with that air filter - what if it does help... I mean I can't drive around without a filter right? haha

I have the Defi Blue Racer Boost and EGT Gauges and an AEM UEGO Wideband - they look great. And the tuner really didn't say much about the boost pressure - they almost acted like it was normal. Maybe I should get an electronic boost controller?

Does anybody have another exhaust that isn't too expensive but would works well for turbo?

The only other thing that might help is to tune off of boost pressure next time. I didn't have an Emanage Pressure Sensor so I had to tune off of the MAF Sensor. I think tuning off pressure is more reliable - so maybe they'd be able to go a little leaner.

Thanks again for the help - I'll post pics/dyno sheets tommorrow and maybe that will give you guys a better idea of why my numbers are low.

 

I'm not positive but I think the note on trying it without the filter is to see if it helps with the boost drop. Don't quote me on this, but I think some ZPI users are having problems with the tube being too long (the tube that goes to the air filter) and thus having boost drop problems.

 

AFIK when you pull the air filter off, if it changes, your charge piping is too long, I seem to remember reading that.

 

If your loosing boost pressure, then you have a leak somewhere. That would also cause your low numbers. Check your wastegate, BOV and intercooler piping first. If my guess is right, one of those is leaking off boost and causing your turbo to work too hard.

 

youre gonna have a heard time finding a cosmetic head gasket... since its cometic not cosmetic..

 

Did you forget the 2.5 inch one?

http://www.zeropointindustries.net/s...products_id=34

 

^^That's only a cat-back system, we are talking full exhaust here.

 

LOL.....That exhaust stops at the S-pipe. It rids the car of a Catalytic converter. If you have a 2.5 inch S-pipe + a 2.5 inch Exhaust (such as the one in the link), that equates to a FULL 2.5inch Turbo back exhaust.

 

Sorry, just saw where it said "lightest cat-back on the market"

But anyway, the Dezod one is TURBO -back..not S pipe back.