As for the motor selection, I would ask myself what kind of horsepower I am looking for. Once that is determined you can make your mind up about which motor to go with. This is not to start battle between the KA and SR!!!! In my opinion if you want a good amount of torque and you are aimiing for between 250-270whp reliably I would suggest a kat. If you are looking for more power on the stock motor with the least amount of work, the sr20 is a good way to go and without doing a head gasket or bolts you can probably get around 350whp with something similar to a gt25r. With head gasket and head studs 473whp is possible on the stock motor, but for a daily driver/drifter you will probably want something that spools a little quicker. Don't count out the rb's but not my cup of tea because of the additional front weight. You may also want to take into account if the ka in the car is worth trying to put a turbo on, high milage? smokes? ect.... If you arfe looking at building a motor completely I would definitly look at the ka for the torque. Not to take anything away from the sr, but let face facts: 2.4>2.0, and a stroker kit for the sr will run around 4500.00 from hks. I think JWT has one out for the sr that is a little less expensive but it is still not a 2.4.
Conclusion: For stock motor setup I would choose sr. Example:Gt25r, safc, 550cc inj, z32 maf, and a large FMIC, 324whp and 285ftlbs.
For built motor setup: Check out the numbers on www.phatkat.org. but for what you are wanting to do I think the route of building a motor would be a waste for drifting.
Also on the coilovers I have heard the Apexi-ni system is nice, and I and a couple of other guys I know run the Tein HE suspension which is setup and valved specifically for drifting by Tein, but no info on the Megan racing good or bad.Here is a link for the coilovers and they have the new super drift line out as well for that car. http://www.tein.com/ti/p06.html
Just my
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