Manual boost controllers get the job done, however they spike occasionally like slash said. I would also save the money and purchase a profec B.

If you want to use a MBC, I would not recommend buying one for $40+. My friend made one out of plumbing parts (total cost came up to $7) and it worked well. It never spiked on his mr2 and he always ran 15 psi. I made one for the supra and it ran about 16 psi (completely open) and occasionally spiked to 17-18 psi (I really wanted to run 18 constantly). If you are interested in this MBC, I can find the parts for you or I can ask my friend to borrow his since he sold his mr2.

Johann