Would upgraded injectors and engine management be necessary to run the 4.0" pulley on a Aftercooled AP2 ('04)?

or would it be safe to run the 4.0" in a otherways stock setup given that the aftercooler accounts for a drop of PSI?

 

Totally fine. I'm doing it on an Ap1, I wouldnt recomend that to you however, but since you have an 8k redline its perfect. You should get a solid 7 psi with the 4" and AC on your ap2, which would be the max safe with stock injectors. Safe meaning your fuel pressure wont have to be all jacked up to 100psi like mine. I assume you know that you will need to increase the fuel pressure on your Comptech FPR to add fuel accordingly. You can easily do this on the street if you have a wideband. One thing I will mention to you about when you do this, is in order to get your upper rpms at WOT to be safe you will end up running a bit ritch on the bottom end at partial and WOT. I believe itts the way the FPR is calibrated from Comptech, you can get around this if you have an old vafc from your N/A set up to lean out the bottm end, this works pretty good, I am one of many who have ran this set up reliably. You will also be able to drop your vtec to gain more midrange power which is always nice. 5k -5.5k is a great place. mine is at 5k

Go for it! You will love it

 

Going to buy CT kit for my 2007 ap2. Where can I find an upgraded pulley with belt?
Any information will help.
Thank you

 

As was posted in reply to your similar question in another thread, Science of Speed is your best source for Novi 1220/1200 pulleys: https://www.scienceofspeed.com/index...1200-1220.html

 

Thank you coolguy. Would you know if I need to upgrade the map sensor, injector running for an upgraded pulley. This kit is out of the box from comptech.

 

You'd need new injectors, MAP sensor, and some form of engine management. You may also need some more fuel management stuff (pump, pressure regulator) as well as some other optional upgrades (bigger heat exchanger, better afercooler water pump, better radiator, etc.).