For you experienced or even inexperienced evo owners, I'm curious without having actually run a dyno test (not one around) what estimated guesses on crank horsepower and wheel horsepower I should have with the following mods?
(2003 EVO)

Drop in filter
Greddy Profec B Spec II EBC - Increase stock boost from 12 to 19.
Greddy Catback SP2
Greddy Blowoff

Also, I just had the catback and blowoff installed today and on my way home, (driving normal - no boost) I noticed that when coming out of gear slowing down, my idle would dip very low almost to stall? Is this something the computer will eventually adjust or what? It never stalled though.

Thanks for all the help! I'm new to this so I'll eventually pick these things up!

 

its your bov

 

are you running vta, if not and you recirc, try the single spring mod i read it somewhere here just do a search , i dont remeber how its done, maybe even try adjusting it

 

what he said. but y are you running 12 to 19 psi????????

 

i think he meant that he changed it from 12 to 19... tho stock boost isn't 12 unless you give an unfiltered boost pressure source directly to the wastegate actuator.. then it's whatever the spring setting is at.. when you hook up the EBC at first with no filter, then it will be around 12...

 

The BOV is recirculating. So, I'm not sure why I would be getting a drop in idle when slowing down. The drop doesn't happen every time but more than I would feel comfortable with.

On the 12 to 19 psi question, I took my car into the shop because I thought 12 psi was wrong, and the master mechanic there brought me out his maintenance book which said the stock evo was set to 12psi.

 

for the idle like i said earlier try the single spring just do a search on how to do it because i don remember,

for the boost i always heard it stock 19psi and then tapered down to 16psi or something like that(i could be wrong idk)

 

I thought a stock EVO was set to 17 psi?

 

19 psi.... what are you guys talking about, maybe 19.5

 

245whp