jimnissan

You are defiantly going to need to address the trany, if people are making that kind of HP on a stock trany it will go in time. Then there is the 5th gear grinding problem that will come up and most likely worsen as power increases. I suggest looking at getting yours built, there are many companies that build theses tranys with good stuff in them. They are usually not much more then getting a JDM LSD tranny that you are going to have problems with finding replacement gear or syncros. Also the SH block is different than the base H22 block so keep in mind that the base tranys will not bolt up to it. The SH type trany don’t come with an LSD from any market US/JD/ED there all ATTS.
I would suggest trying to get a base block/tranny and build that as your option on trannys and ratios open up a little easier. Some would say to use an F series tranny if you’re going to make that kind of power anyhow. As the prelude tranny have short ratios and the JDM/EDM LSD trannys have some even shorter 4th and 5th gears, although theses tranny only bolt up to the base H22.

I have heard some things about synchrotech-transmissions.com/