Brent, no dyno just math figures,you add 7% hp for every lb of boost I only added 6 lbs of boost. the turbo on my engine doesn't start making a lot of boost until about 3,000
rpm or more,perhaps a different turbo could develop more boost at a lower rpm.
If I were to start over I probably would use a Yamaha 4 cylinder engine and turbo charge it,there would be a little less HP and a lot less weight,however the RAF handles
the extra weight of the subaru just fine do its not really a problem.
Thanks for your inquiry.
best regards,eddie.....