Well i got a 90 dx crx and it has a d15 block and d16 head with vtec but it has the dual port fuel injection setup old school and a pm5 computer it runs great but what do i need to get the vtec wired up what ecu do i need and do i need to change to mulitport and then wire up the vtec silinoid?

 

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I would do the multiport conversion. It is not that hard to do, and I dont think the daul point will get enough fuel to the motor when in vtec. You can use the pm6, si, ecu and use a vtec controller, or buy one from fabrik8 who chips it for vtec.