Alright so I know the engines are different between the Si and the RSX-S, but is it possible to change the timing of my V-Tech in my Si? I don't like that it kicks in at 2500 rpm, I'd like it to be higher (similar the RSX-S).
Registered: 07/29/02
Posts: 8828
Loc: Bellingham, WA
You can change the V-Tech in your Si pretty easily. May I suggest the Learning Laptop? They're only about $40:
As for the i-VTEC [Intelligent Variable Valve Timing and Electronic Lift Control] mechanism your engine employs: You bought the wrong car and your VTEC works in a completely different way, switching between opening a single intake valve a tiny amount in 'ultra economy' mode below 2200rpm (basically behaves like a 12 valve engine) to opening both intake valves a very small amount above 2200 (behaves like a 16 valve engine) There is absolutely nothing to be gained by mucking around with changing the cam lobe crossover engine speed on your engine, as it is designed to produce a semblance of low-end torque and provide good fuel economy, unlike the K20A2 which is designed to flow well and produce power.
If you want more power, swap a K20A2. And change out the bottom end to a K24 while you're at it. (More displacement makes low-end torque better than atrophied intake cam design) And maybe swap the gearbox from the Type S. Six speeds are all the rage, you know.
My suggestion is porbably pointless given the n00bness of this entire post, but if you are really serious about turning up teh VTAK and probably doing more harm then good, go to Hondata: