whats the crack with 16v turbo?

[oldeskewltoy]

kazi - "as I miss the power", what kind of power/car are you more use too??

Have you driven an AE86 with 170-180 crank hp? It isn't supercar quick... but it is a great compromise between mashing the throttle and accelerating... as opposed to either... mashing the throttle and not moving... OR having so much power that mashing the throttle only gets you a violation of one kind or another.......

If you are looking for torque and power and keeping it n/a, look into building a 7AGE.


Now on to turbo builds... 250whp should not need much more then a set of pistons, a mild cam, a set of performance valve springs, a properly sized turbo, and proper management (with knock monitoring).

Pistons - you could use OEM Toyota 4AGZE pistons, but they are very old technology. The original 4AGZE pistons are just too low a compression, and while the 2nd gen pistons are better, I'd look for a custom piston with a static CR of about 9.5:1, or 10.0:1 for best results.

Mild cam - Stock cam duration is 240 overall, and 204 @ .050". I'd keep duration @ .050" to 212 or less. Big lift cams will require big $$$ work to get them to "fit", I'd keep lifts to 9mm, or less. 9mm lifts will fit many of the "performance" valve springs.

Valve springs - for the intake side a MINIMUM of 32# + #'s in boost you plan on running (15#s of boost = 15 + 32 = 47#s of seat pressure on the intake side). Exhaust side doesn't have to contend with boost. Now for a but... although the exhaust side doesn't contend with boost, a performance spring will accommodate larger lift, longer duration cams better then stock springs.

Engine Management - Keep it simple... decent resolution, ease of tuning, knock monitoring, data logging.

Turbo - something with quick spool, that will make a max of 330-350hp pumping to a 4AG. This will allow you to make your goals, with a little bit extra for "turn'n up the wick"