Mine is 2001 2.0L,I think our audm should be the same as usdm?

All I know is that we have 176kw (236hp) at flywheel?

Would I just get around 220 whp seeing those single 70mms makes around 10according to what I read?

 

nope. You have the same MY as me, so you're stock baseline is going to be somewhere between 185 and 195, depending on engine health and dyno type used. Putting just the 70mm on will help, but you won't get 10 out of it until you correct something first...your A/F ratios. 01's run pig rich from factory from 8 grand up, so to maximize the gains you'd get from any exhaust, you'd need to get your engine to make power up top. Get a VAFC, and have it tuned. Then go get an exhaust. As you can see, with a 70mm, the delta on the graph gets larger as the rpm's rise..that's cause the increased flow now has somewhere to go. See how his drops off right after 8 grand? Yours will too. Once you trim it to peak around 8750, you'll get have a better shot at getting the 10 hp you were looking for out of the 70mm.

The same applies to you Nate. You need a tune badly, my same named brudda

 

tuning is where all the power is unlocked!

 

Yeah but I wanted to do all the other bolt ons except the catback exhaust as I would like to keep stock sound although Ive got berk TP and will be getting a header

I really dont want a loud single on my car, I probably would if they were quiet

 

doing all the bolt ons that the rest of us have but keeping the stock exhaust, would guess you'd see mid 215's or so.

 

 

as soon as you get rid of your mangina and bolt on a single your car with oooze with power!

 

You would still see the benefits of your mods, but everything you do to modify your car works in symbiosis with other mods. Without changing your exhaust, you won't be able to see all the power that you otherwise would have from whatever other mods you'll do.

for example, my peak horsepower before my ITB's was 208 @ 8800 rpm. After my ITB's, my midrange went up by 40, but started to get bottlenecked at the top, and peaked off at 210 down at 8000 rpm. My power doesn't drop off much after that, it just kind of hovers there. My exhaust is bottlenecking my peak power, since it simply can't flow the air it needs to above 8000 rpm to continue to make power.

 

with exhaust i wouldnt be supirsed at all if your peak #'s went up 30-35whp.

 

^oh no doubt bro. I think if I went with a 70mm single, I'd crack 230.

I like duals though, so I made up my mind to get the Invidia when I go to buy one. That should still get me 7-10 with my setup, at the least.