Apr A-box: Upgrade to version 5.0?
 

Is there a consensus on whether 5.0 is better than 3.3 on A-box? A-box was supposed to be fast on v3.3, correct? Is the upgrade faster?

(I just picked up an APR chip, and haven't put it in yet, V3.3)

Re: Apr A-box: Upgrade to version 5.0?
 

when i upgraded in my car A Box i noticed less of a "kick" down low but much more powerful and smooth across the rpm range. i think it is worth the upgrade..plus if you don't like it you can go back to v 3.3...give it a try

go v5.0
 

i had the 3.3 for a while. it may seem as though you have more torque down low, but i feel the powerband is much more even in the new version. and the chip's capable of posting damn good timeslips.

i vote v5.0

I would say yes. In the cold months, the difference between the two isn't as noticeable.
 

When it's hot out, v5.0 runs much better than v3.3. V3.3 has a little more initial kick, but from 4300rpm on up, v5.0 is stronger. My car ran very stronger on v3.3, but I must say I liked v5.0 better in overall power.

v3.3 was never fast on A boxes...
 

<img src="http://www.cofusion.com/audiworld/apr-v3.3-551a-timing.png">&lt;/p&gt;
<img src="http://www.cofusion.com/audiworld/apr-v5.0-551a-timing.PNG">

My car (A Box) put down good numbers @ Stage II w/ v3.3.
 

But when it was hot out, v3.3 fell off. That was my biggest issue with it. Hot weather performance suffered. Cold weather performance wasn't bad though. I don't know why other cars haven't been able to be run pretty good with it, but there are a couple A box cars here that ran v3.3 and ran pretty damn good.

If I end up moving to O-town, I'm definitely gonna have to check out your ride. I should be there in March for Tuner fest in Daytona.....we'll have to hook up.

ditto. Love 5.0 for daily driving. It's smoother. 1-3K RPM

I agree. My A box v3.3 w/cat back was much stronger than an M box stage 2 that I drove.

Yea. The M/H box cars were very much down on power.
 

Don't know what the deal was, but they were more than 25whp lower than APR A boxes or other brands. The last v5.0 dyno I saw on a H box was impressive....it put down the same numbers as the X did...but I still believe that the X is a little faster.

Man, that bumper looks good on your car!