Guys!

I have been searching all over including APR's website trying to find what gains I could expect to see with their stage 2 ECU!

I see that stage one gets you ~40 hp and ~100 ft/lbs but what do you get by going up to stage 2 and adding the recommended test/HFC?

Anyone know?

 

**** man, I ma running stage 2+ but never ever took it the dyno. All I can tell u tho is that test pipe is way better than the HFC. Only testpipe is quite stinky and also couldnt pass emmisions so I got the HFC. It kinda feels slower now but at least doesnt stink

 

stage 1 and 2 are exactly the same...except it just gets rid of your CEL for the cat, thats all.

 

That's the info that I was trying to figure out thanks!

I think I'm going to run a HFC because I don't want to have to change it out for inspections.

When I was asking my local shop about upgrades, he said I should look into...

"To complement the software, I would highly recommened a Sprint Booster to get rid of the delayed factory throttle response. Your A4's drive-by-wire throttle is calibrated to be a bit too soft, so the Sprint Booster intecepts and changes the electronic signal, changing the curve of response to be much more immediate."

Ever heard of this?? Is it a good upgrade?

 

Oh good lord. Not this thing again. Please do some research. And if you're not absolutely convinced this is the biggest waste of money ever, send me an PM, and I'll build you one for half the price.

All this does is advance the voltage in the DBW system. Complete waste of money.

 

yea thats not very important, if you have a manual, the throttle response on it is pretty damn good in my opnion, even with just a stock base.

 

A pretty good write up on the Sprint Booster.

http://www.crosslake.net/~dbipes/spr...intBooster.pdf

Save your money.

 

That is completely untrue. Stage 2 you get a high flow cat or test pipe and then the tune dials that in even more. I have done this and there was very nice hp increase. Add a fuel pump to stage 2 and you feel another large increase. Check out APR's dyno's as they are correct. I did not dyno but I went from stage 1 with a decent power increase to stage 2 and having a hard time with tire spin all the time.

 

Thanks!

What HFC would you get to go with stage 2? Cause I'm definitely not paying $1000 for a milltek.

 

Check out 034 Motorsports for a HFC. But Makav3li is right about APR's stage 2 tune, the software can already take advantage of HFC and exhaust and stage 1, stage 2 just eliminates any CELs from the oxygen sensor. Other vendors may actually adjust the tune for stage 2, though.