Thread: N1 vs Standard Valves

Just curious... is there any difference between N1 valves & standard SR16VE or SR20VE valves?

these would be useful

So if I've read the first page correctly N1 intake valves step down to 4.5-4.6mm?
That is certainly a skinny valve stem. It would also explain the slow ramps on the n1 cams and the light springs.

there just cut back to help flow arnt they?

I dont thin its for that reason.

IMO its to help airflow in high rpm, especially around the base of the valve. This would help with atomisation and increased fueling capacity for higher rpm with the second bank of injectors.

They also appear to be slightly smaller or did I read that wrong?

I'd agree, it is for flow. I was just saying it would make sense that they have been modified over the std ve valves
The fact that n1 cams have slow ramps and (I believe) lighter valve springs sort of backs that up.
It was just more of an observation than anything.

The difference comes on the intake only. The exhaust valves have the same specs. I believe material on N1 valves is different.

SR16/20VE Intake 13201-1N500

S16/20VE Exhaust 13202-1N500


N1 Intake 13201-1N520

N1 Exhaust 13202-1N520


P12/T30 20V/VET Intake 13201-8H600

P12/T30 20V/VET Exhaust 13202-8H600

Awesome! Thanks Out_of_Sight!!!

Its interesting to see the valve size diameter actually decrease as well, and difference valve angles. Certainly nissan squeezing everything to reach that ~200 mark.

And the 20V has ~5.5mm stem width for both so they would use diff valve guides as well but no step.

Anyone convert to english?