Ok here is the true info on venting to atmosphere.

Some 4g63 can do it some cannot...there is no true reason why, you just ave to try it.

Some will cough and sputter because the maf is reading incomming air and richens the fuel making the car run super rich the second the bov opens until it closes. However, some ECU's are content with this....I have personally done it to a friends GST spyder and no problems for 2 years. You just have to try it.

the 4g63 will handle 500chp its proven but it must be tuned correctly, like the 420a it will not deal with knock at all, i mean at all.

You must add to your mods.....remove the balence shafts. cheapest way is to leave them in but remove the belts, its safe to do. I personally like to remove the motor and use the kit but its ok to just leave them there as long as you dont mind the weight staying in the motor. The balence shafts cannot handle any abuse, the bearings go to shit real fast.

port your exhaust manifold and turbine side of turbo...makes a difference later on in that motor. not saying pay a shit load just do it if you know how or a friend does. Manual boost controller is nice, i personally like the HKS or on the cheap i like the turbo xs dual stage....its all preference.

Most important......once a year drop your oil pan and watch for signs of crank walk! Be good to her and she will be good to you...lol had to throw that in there....

DO NOT REMOVE THE HEAT SHIELDS on the turbo......documented that the rad fans get ruined by the heat. now i know a guy here in IL that makes some nice shields to replace the ugly ones.

Terry

96 Eagle talon ESI
Star Stage II - Boost/oil/EGT gauges

97 Eclipse
Greddy header - Apexi N1 3" exhaust - SFMU/return line - Stage 2 6 puck Sprung hub MIBA clutch - Shortened shifter - Koni Yellows w/eibach prokit - Stillen Fr/Rr swaybars - ceramic intake - DEI Keyless entry alarm - Niche 17" Shoks

Waiting to be installed: Apexi AFC, HKS EVC IV, 450 Turbo injectors, GSX Front brakes (need rotors)

Mitchell on Demand copies available