someone with a ca commenting on redtops, nice...
which motor you buy depends on how much cash you have, how comfortable you are working on cars, and who you know. redtops are older, cheaper, and relativley easier to find. the blacktop is no different from the redtop(mechanically), save some extra reinforcement in the head, although i have never seen someone crack an sr unless they were taking it off. blacktop is newer, figure an extra $150-$500 more than a redtop, and a little harder to find. the vvt motor is newest(i know the type x but for my purpose here its the newest), rediculosly expensive, and near impossible to find. the vvt and ball bearing turbo allow the motor to make more initial power than the s13 motors, but the initial cost is such that money spent on a vvt could have a solid s13 motor making more power.
if its gonna be a daily driver, buy the vvt. then buy a fuel computer, z32 mafs, fmic, and injectors and you should make around 280whp. add some cams and you might see 300whp, youd be the first though. this is the good part. the vvt is so much more expensive than the s13 motors that you could buy a redtop/blacktop, all the crap i just mentioned, and still not have spent the money you would have on the vvt.
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