whats going on ht, im not very familiar with k series engines but i've been told the diff. between the rsx-s n the civic si is that on the civic there is one cam for when your not on vtec and the other cam is for when vtec engages, basically your using one cam at a time. and that with the rsx-s its like the b series when vtec engages your using both cams. is this true? another question is which is the number for the rsx-s k20 and civic si k20 thanks in advance

an i know its a lot, but whats the diff. between vtec and i-vtec

thanks a lot guys!

looking to buy one or the other, , so tired of my shitty focus even tho its just a dd

 

K20Z1

* i-VTEC
* Found in:
o 2005-2006 Acura RSX-S
+ Displacement : 1998 cm3
+ Compression : 11.0:1
+ Power : 210 hp (150 kW) @ 7800 rpm & 143 ft·lbf (194 N·m) @ 7000 rpm


K20Z3

* i-VTEC
* Found in:
o 2006 Honda Civic Si
+ Displacement : 1998 cm3
+ Compression : 11.0:1
+ Power : 217 bhp (147 kW) @ 7800 rpm & 139 lb·ft (189 N·m) @ 6100 rpm (SAE corrected) 189.75whp on the third dyno run; wow!(stock)

The last evolution of Honda's VTEC system was back in 1995 where they introduced the now-famous 3-stage VTEC system. The 3-stage VTEC was then designed for an optimum balance of super fuel economy and high power with driveability. For the next 5 years, Honda still used the regular DOHC VTEC system for their top power models, from the B16B right up to the F20C in the S2000. Now Honda have announced the next evolution of their legendary VTEC system, the i-VTEC.

The i stands for intelligent : i-VTEC is intelligent-VTEC. Honda introduced many new innovations in i-VTEC, but the most significant one is the addition of a variable valve opening overlap mechanism to the VTEC system. Named VTC for Variable Timing Control, the current (initial) implementation is on the intake camshaft and allows the valve opening overlap between the intake and exhaust valves to be continously varied during engine operation. This allows for a further refinement to the power delivery characteristics of VTEC, permitting fine-tuning of the mid-band power delivery of the engine.

 

k20z1 201 hp
k20z3 197 hp

 

thats for the 06 what about the early years you know like 02, 03, 04 as far as the civic is that true that its one cam for vtec and the other for when your not on vtec?? cuz those are the years im looking at

bad a** response jo3 thanks