dpfi-mpfi vtec?

[ATMDC]

ok if someone were to sell me an si head with all of the intake manifold and all that, with the ecu, is this all i need to make my std vtec equipped? or what else do i need?

[Jos4DCivic]

Si (D16a6) Head is a non-vtec head so yeah you will need to get a vtec head first. you have a couple of options for vtec head.
D16y8
D16z6
Jdm D15B
But if i were in your position i would just get complete Y8 motor. Can be had for cheap and probably cost about the same and put out more power than D15/Y8 mini me.Just my . But if you had A6 block wanting to put vtec head on ,i would do differently.
Also you still Have to convert to MPFI.

[ATMDC]

oh ok, i thought the si was vtec. if i just swapped the heads from my engine d15b with the si head is there anything better in the si head or are they both the same?

[Kven]

As far as the SOHC VTEC heads go, stock for stock the Z6(92-95 Si/EX) head out flows the Y8(96-00 Si) head due to the fact that the Y8 head is biased towards economy(one port is turned a little to encourage swirl), but ported the Y8 is better than the Z6 because of the greater squish area.