[bah14]

I've been modding my '05 for quite some time now. If you have a Q, I'd gladly give you my opinion over PM's.

Check out my car page in the VB gallery.

Cheers

[forgedSTi]

Reading this might help.

The "real" 3 stages (what works)

you can substitue the Ecutek with your engine management of choice, i.e., UTEC, Cobb AP, Hydra, etc...

[2fas4u]

Now that I have data and experience to back this I will "chime in" on the intake. I installed an Injen CAI and TBE as my first mods to my 05 STI. I loved them! Sounded great no obvious problems. I now have a GP motto header and all my guages installed. I am not happy with what Im seeing from the wideband A/F though. I dont have any EM installed yet and my A/F is all over the place and seems to be a bit on the lean side. This is most likely from the intake. With the UTEC I can help this but be careful running our engines lean is not a good thing!

[05impreza]

Originally Posted by jaygoesfast

The Perrin EBCS and Staticx turbo heat wrap kit were probably the best bang for your buck mods that I have put on my car so far, but keep in mind that you need a custom tune for the EBCS.

whats the difference between and avcr and perrin's ebcs?

jason

[Nachos Libres]

Originally Posted by billg

Dear SVT - Your post states 239 whp for your modded '05 STI. I thought a stock '05 STI generated about the same whp. Can you explain please?

I hope that, on my stock '05 STI, by adding a Perrin full tbe and having the ECU re-flashed by Vishnu that I will have about 280 whp. They claim about 45-50 whp increase over stock by doing these two mods.

Wow, I just noticed this post since someone bumped the thread. The mustang dyno used for MZM in Austin, TX, dynos a stock STi around 190 whp and 190 wtq. So the intake, TBE, fuel pump, and tune added ~50 whp and ~70 wtq. Please click on the link on my sig for all the details.

[billg]

Dear SVT - Interesting! The Mustang dyno used by Vishnu Performance Systems on my 'o5 STI showed about 270 whp and 280 wtq after having ECU reflashed and tuned and adding Perrin turboback exhaust system. I can't remember exact numbers, but these are close. I have stock fuel pump and no other mods, except short shifter kit.

[WolfPlayer]

Originally Posted by jaygoesfast

The Perrin EBCS and Staticx turbo heat wrap kit were probably the best bang for your buck mods that I have put on my car so far, but keep in mind that you need a custom tune for the EBCS.

Jay is a cool guy ... and we can agree to disagree HOWEVER, my recent tuning adventure shows that the EBCS is not worth the money on the stock turbo at all. Why? Everyone is comparing a tuned EBCS setup to a stock setup. You can't do this. It is apples to oranges. The only valid comparison is ...

Tune the stock solenoid setup.
Replace with the solenoid with the Perrin EBCS.
Retune the exact same setup.

I have done this. In my personal experiences tuning the stock solenoid and tuning the EBCS ... they both provide the same spool. Both setups gave me 19psi between 3100-3200 (no wastegate helper spring). I challenge ANYBODY to prove me wrong on this (and I mean anybody). This was on my car tuned by me with an APS TBE w/ cat and some stock airbox mods. Keep the stock solenoid. It performs remarkably well. I have also conversed with several very experienced and trusted tuners about this and they confirmed my thoughts. I still have the EBCS on my car ... but honestly, it was ~$90 that could have been spent better elsewhere. Is it a quality product? Heck yea. But, you have to put it in context. There is no point replacing the stock solenoid with the EBCS if you don't get a benefit from it. On a stock turbo you will NOT see an increase in spool if the tuner knows how to tune the stock solenoid. Both setups spool the same when tuned for it. However, the EBCS is extremely touchy and can spike easily. I can tune the spikes out one day ... and then they come back on another day when the weather changes.

... now, on a different turbo this all goes out the window. But, on a stock turbo, a Perrin EBCS just isn't necessary. Again, this assumes that both setups are tuned and the tuner knows how to tune a stock solenoid setup.

t

[bah14]

well said Wolf. I also happed to agree with you. Keep the stocker until you go with a bigger blower.

[timthegreat9]

i bought an 05 not too long ago. i got the APS cold air intake and a full APS exhaust without a cat. i got it tuned a new fuel oil pump put in at the shop when they tuned it and now im running 344 ft/lb torque. between 3k-5k rpm im running over 100ft/lb torque over a stock sti.

[dowroa]

Ha.... I read this thread and I immediately thought:

- Whiteline F/R sways
- STi Pink Springs
- Front camber bolts.

Heh... funny how different people interpret what the best 'performance' mods are for the money . I bet you with the 400 I spend with my money, I will be faster than anything else listed above 'on track' (with turns).

- dow

[AndyH]

Originally Posted by garrettjj

Hey Gami, congrats on your STI purchase! Glad to help if I can. From the research I've done and people I talked to the best intakes to get are either APS or KNN Typhoon (Or drop in KNN Panel filter).

A K&N drop-in panel filter will gain you nothing according to test results posted over on NASIOC:
http://forums.nasioc.com/forums/showthread.php?t=826140

[Nachos Libres]

Originally Posted by AndyH

A K&N drop-in panel filter will gain you nothing according to test results posted over on NASIOC:
http://forums.nasioc.com/forums/showthread.php?t=826140

Agreed, it was the worst $40 I spent.

The only way a K&N drop-in would be worth it is if you plan on sticking with the stock air box for a long time and don't want to pay for air filters, but it will give you no performance benefit.

[thrlskr]

Best Mods per $ R-Comps and Negative Camber

$0.02