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Originally Posted by Canaduh
The tiny turbo that everyone swaps out, in the SR20, with a front mounted-intercooler, is capable of producing similar if not more power then the KA ringlands can even take. So a stock SR20 with a front mount can still make as much power as a turboed KA with a stock bottom end. This is saying that the boost on the SR is tuned around 14Psi max. Dont expect the turbo to last though at 14psi :P . But still with moderate boost settings,it makes as much power as a turbo KA with stock bottom end.
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Where are you getting this information? OEM internals have been shown to hold around 300rwhp in the KA. I have NEVER heard of anyone having problems with the ringlands. A stock SR20DET cannot make the same power a "stock" KA24DET can. Both have forged internals (proven) and both hold over 300whp on stock internals (save for the 9.5:1 CR pistons in the KA, which are almost always swapped for 8.8:1 or 8.5:1 aftermarket ones...)
And assuming that what you're saying is true... that an SR makes the same power that a KA-T does under "moderate boost settings," why would anyone get an SR? Parts are MUCH more expensive, and in many areas in the country, smogging an SR is a hassle. If you're aiming for "moderate boost" than why boost an engine that will cost thousands to fix if blown over one that will cost you less than an aftermarket clutch?
A couple other points...
1. The SR20DET is a square engine. This means bore = stroke. The KA is an over-stroked engine, which means that bore < stroke. This means that at any given RPM, the KA has a higher piston speed. Higher piston speed means faster exhaust, which means faster spool. This means KA owners can take advantage of larger turbos without worrying so much about turbo lag.
2. The SR20DET is a 2.0L engine. The KA24DE is a 2.4L engine, thanks to it's long stroke. The increase in displacement equates to a greater exhaust volume, which also contributes to faster turbo spool. Also, while this may seem redundant, in a piston engine, the greater the displacement, the greater the torque. Everyone knows that horsepower is just an arbitrary measurement of power derived from torque. You do the math.