I am waiting to Dyno but I am sure I am at 310 to 315 whp due to the cars I have been murdering and their trap speeds. I have an 05 Evo so I got the 10.5 hotside, and I added turbo-back exhuast, Hallman MBC, and an AEM v2 Intake and then the next day had the car custom flashed by Mark from TurboTrix. It made a HUGE difference. Buy these parts with a TurboTrix flash and you are set Mail in flash would be ok.....but the custom hands on is always better.

 

My goal was 320whp while looking as stock as possible without touching the cat, but I don't think I'll quite get there...and especially won't get near 340:

- 3" cat-back
- Hallman Pro MBC
- MR DV
- K&N filter
- S-AFC

I think this has put me around 290-300whp on a Dynojet, but I will find out on the 23rd. On pump gas, I ran 12.64 with mph of 107-108. With 104oct mixed into the 93, I got 12.22 and mph of 111 basically, so that's 320-330 or so. I can't imagine being that fast on a cat-back without using cams...

Putting on a DP while still on the stock cat won't help (maybe 2-3 whp), so that's not a big deal. A flash is ok, especially a custom flash, but no flash is going to put you at optimum power levels to achieve 320, and those settings won't provide the same HP all year 'round due to changes in temp/humidity. If you want to have that much hp on tap reliably and with few mods, you will need a self-tuning device and learn how to tune it to optimum levels safely.

 

I wouldn't doubt that you are around 310-315, but that's a full TBE, and he needs to keep his stock cat. That's a significant difference there (10-15whp).

 

Ditto on the cams.. All you would need is 264's and a good custom tune. I just got the 264's and they idle almost exactly like stock.

You could even get the flash from Dynoflash that controls your boost so you wouldn't need a MBC.

 

Cat back, custom dynoflash boost tune, and white rabbit. Should get you over 320, only thing to see is exhaust unless they take apart the turbo (doubt).

 

The real question is WHP or crank? Then the follow up would be on which Dyno?

People get those numbers all the time on a 2wd dyno which is completely inaccurate. You could never hit those numbers on a Mustang 4wd dyno without making a cam change.

The dealership would never see the cam change anyways unless you want to be flashy and keep the gear cover off.

 

I should have said without making a cam change, alky, or running race gas and turning up the boost.

The typical bolts on's with a re-flash are not going to get you and accurate 320WHP unless you have some really strong car from the factory....even then.

 

I'm going the same direction that you are and want to keep it as stealth as possible. Everything i've done so far has been internal (except for JDM MR BOV) and no one can tell the difference at all from stock just by looking at it.

My mods are on my sig.

 

What if he got a reflashed stock ecu AND kept a stock ecu, then just switched them before going to the dealers? I know its only 15-20 whp but the dealers wouldnt ever know.

Looks about the only thing you could do except cams ( doubt they'll inspect them).

 

Yes they do.

 

I knew this would be interesting...Who is Al and which re-flash are you talking about? And what is a 10.5 Hotside?

 

Search, search, and search. All 3 are as basic as it gets...

If you don't even know these things, then I wouldn't expect 320-340whp without cams and while on the stock cat. Also, even though I'm empathetic to the desire not to void the warranty, I have no idea how you can feel this way yet lower the car. That is the #1 and most immediate reason for them to void the ENTIRE warranty, because they claim that any change in the suspension setup can cause problems all throughout the car.

 

320 - 340 hp does not require cams. Actually, with a good exhaust, K&N, and tune, you are there! But the tuning is key. I just saw a car put down 290 awhp with that setup.

 

How is 290 even close to 320-340? We're not talking about crank hp. 05s already have 310 crank hp (310bhp - 20% = 248awhp), so trying to get 320-340 wouldn't make any sense. We're talking about WHP.

 

I guess we all have ideas about what sets off the dealers and certainly opinions vary as do the dealers. I still have the stock springs if I had to change back. I am sorry I do not know "the basics". Still learning, car is only 3-months old.