Adding power to a stock A4 2.0 Turbo.

**keihoop** · 02-07-2011 07:07 PM

What is the reality of how much power you can actually add to a stock 4? Im thinking Chip+Exhaust+Filter...what will that get me? Thansk for any help.

**Bells7246** · 02-07-2011 07:18 PM

At least 55 hp, you also should change the diverter valve. If you wanted to go big you can go for full Stage 3 upgrade(GT28,fueling, tune, downpipes), that would push the car close to 400hp.

**hoppy6698** · 02-07-2011 07:19 PM

Chip - Depends on which type, but most add about 40+ HP and 70ish TQ.
Exhaust - 5-10 HP, if that much
Downpipe - 10-15 HP, 8-10 TQ, this frees up the most restrictive part of the exhaust ... the beginning
Intake - 5ish HP, if that

The new turbo intake from APR, i think, adds some real sick numbers to trump most of these, mostly because it comes with the chipping and a more efficient turbo.

**Blake P** · 02-07-2011 07:49 PM

Wow, talk about not bothering to search. Seriously?

Originally Posted by Bells7246

you also should change the diverter valve

This is simply not true. There have been no reports of the new DV's failing on the B8 forum. In fact, many have indicated that the OEM design is superior to the current aftermarket offerings.

**A5MD** · 02-07-2011 09:25 PM

Originally Posted by Bells7246

At least 55 hp, you also should change the diverter valve. If you wanted to go big you can go for full Stage 3 upgrade(GT28,fueling, tune, downpipes), that would push the car close to 400hp.

I can't see 400. The K04 doesnt even produce 400

**babadudu** · 02-07-2011 10:22 PM

Originally Posted by A5MD

I can't see 400. The K04 doesnt even produce 400

I think K04 is a "smaller" turbo than true stage 3 ..i.e. GT28

**A5MD** · 02-07-2011 10:35 PM

Originally Posted by babadudu

I think K04 is a "smaller" turbo than true stage 3 ..i.e. GT28

My bad. Thanks for clarifying.

OP: What were your previous cars? Have you driven any cars that have either the GIAC or APR tune? Since you have an 09, you can do the 30 day free trial period from APR and see how it feels. From there you can add a HFC then upgrade to stage 2 if you go with the APR tune. I have this setup and spent @ $1,300 and it was well worth it

**MiracleWhips** · 02-07-2011 11:42 PM

Originally Posted by Blake P

Wow, talk about not bothering to search. Seriously?

This is simply not true. There have been no reports of the new DV's failing on the B8 forum. In fact, many have indicated that the OEM design is superior to the current aftermarket offerings.

Yup, and not to be a d#$k, but this is what happens when trolls get the ball rolling in a thread.

**ThePiombino** · 02-08-2011 04:21 AM

Originally Posted by keihoop

What is the reality of how much power you can actually add to a stock 4? Im thinking Chip+Exhaust+Filter...what will that get me? Thansk for any help.

Filter more for sound than performance. If you get 5 actual HP, that would be a lot. ECU flash, FULL exhaust and FMIC would be your easiest/cheapest way to approx 300 HP. ECU flash will net you about 25-30 HP, plus FULL exhaust (with either test pipe or HFC) will net you another 25-30 or so. FMIC I believe is 20 HP ballpark. And don't kid yourself- even though these numbers add up to 70-80 HP, it doesn't not mean you'll be adding 70-80 HP. Each add-on maxes its HP at different RPMs and whatnot, so odd are you may only see 75%-80% of this. That said, short of going APR Stage III, this is the cheapest and fastest way to approx 300 HP, prolly really more like 275...

Originally Posted by Bells7246

At least 55 hp, you also should change the diverter valve. If you wanted to go big you can go for full Stage 3 upgrade(GT28,fueling, tune, downpipes), that would push the car close to 400hp.

You must not be familiar with the B8... OEM DV is more than efficient and does NOT need to be replaced. Also, the only "Stage III" out right now is the APR K04. Unless of course I've missed something, which is totally possible...

**ItsDubC** · 02-08-2011 05:02 AM