Rev limiter for 172 ph1 is at 7400? Noob question but important for me right now.
No, the ph1 limter when warm should be:
1st gear :7200 rpm
2nd gear: 7200 rpm
3rd gear : 7000 rpm
4th :7000 rpm
5th : 7000 rpm
Honestly? I had no idea about that.
No, the ph1 limter when warm should be:
1st gear :7200 rpm
2nd gear: 7200 rpm
3rd gear : 7000 rpm
4th :7000 rpm
5th : 7000 rpm
The clio's change the timing at circa 1800 rpm, and back again circa 5800 rpm.
The '5k kick' is simply where the engine reaches its volumetric efficiency
As said the Honda Vtec system works by having 3 valve lobes per valve, 1 small one, and 2 larger ones either side, that are operated by oil pressure at a set rpm.
Under that set rpm, the smaller cam lobe is in use, with the 2 larger ones floating, not in use.
When the set rpm is reached, Oil pressure shoots a locking pin through all cam lobes locking the 2 larger ones into the smaller inner one, there for bringing the larger lobes into use. This holds the valves open for much longer, giving an agressive power increase and giving the fabled vtec kick.