I presently have a Silvertop 20V 4A-GE in an AW11 MR2. I have a Haltech E8 with MSD DIS-4 ignition. I have a GTP38 Turbo from a 6.0 Powerstroke. I'm planning on running a liquid to air intercooler setup. Aiming for 400HP. Planning on using a Quartermaster 2 disc 5.5" clutch. I hope to retain the use of the VVT system if possible.

Questions:

1) What size BOV should I use? I'm looking at a 40mm and a 50mm
2) Do you think this turbo would work on the 1.6 without surge?
3) Any cam suggestions? I was thinking 280 intake 305 exhaust, (Head is race ported)
4) Any other suggestions or comments?

 

Any decent bov will work, I don't know much abou that turbo so i cannot comment. The vvt system should work fine, but those cams are somewhat ridiculous. Depending on lift you're going to most likely need underbuckets. Look on www.mr20c.com their are a couple 400whp 4ages on their. If I were you I would ditch this idea completly and do a 3sgte.

 

all i know is the 4ag doenst like aggressive cams. it'll puke em right back at you in the form of metal internal parts.
you can go safely in the low 270's.

 

and if 3sgte isnt baller enough for you do a beams 3sge+t

 

Beams engines are a form of rice.

 

Look at this build maybe some ideas for your setup: http://www.geocities.com/MotorCity/L.../20-valve.html its in a ae86 but why not twincharge it yeah.
Uncontrollable wheel spins yeah!!!

 

$ for $ you will not get better hp gains and reliability. The 4age needs $$$ to make big boost, my gte makes 230whp and i did it all HMT getto fantastico. But to hit 300 nm 400 you're gonna have to spend way more and your reliability will ---- the bed. Besides ---- hp, get some torque its way more fun

 

What breaks on them at the 300+ level?

 

check out this site this may help on modifying the 4ag 20v : http://www.billzilla.org/4agmods.htm
and answer some of JD's questions about what breaks in these engines.

 

Advised the guy with the twin charged engine, his configuration all wacked. Its not a true Twincharged setup. True TwinCharged has no bypass valve, it compounds boost. I'm sticking with my 4AG and it already had underbucket shims, they come that way. I believe if my memory serves me correct, this is the closest compressor to the GTP38 garrett shows specs on http://www.turbobygarrett.com/turbob...1_731413_1.htm They say up to 390HP. as far as the $$$, I do my work myself and have the skills and ability to make about anything I need.

And between the VGT and VVT, I should have all the wheelspin I need available. My goal is to set up a road speed to boost level map in the E8 so I wont be skatin all around on the streets when the boost comes on.