Peter loveday
Club Member
I'm putting together a loose spec list for my engine build and looking for some real world guidance on what is realistically possible. I've started to collect some bits but would appreciate some feedback around CR and cam choice.
I'm not going to give a power target but I would like a very rev happy engine which I assume would be limited by the standard crank. I have an N42 block in great condition which I will bore out to between 88-89mm wall thickness dependent. I will be running either Datsun spirt or Kamenari lightweight pistons and rods (139.5mm) with the usual other upgrades etc. The head will be a maxima n47 which I will port or have ported and I will likely go with 45/36.5 mm valves.
Looks like this would result somewhere around a 12:1 compression ratio which will fall a bit with unshrouding etc. What cam is realistic to keep Det at bay running 99 RON without sacrificing ideal ignition timing?
Perhaps I am looking at this the wrong way round, eg choose the cam and build around that eg the cam kit sold by mike .560" lift and 300 degree duration- what cr would be ideal.
Any particular manufacturer or specialist that would be recommended? kaminari, Datsun spirtit, Les colins etc
I realise these are some very specific questions
Thanks
I'm not going to give a power target but I would like a very rev happy engine which I assume would be limited by the standard crank. I have an N42 block in great condition which I will bore out to between 88-89mm wall thickness dependent. I will be running either Datsun spirt or Kamenari lightweight pistons and rods (139.5mm) with the usual other upgrades etc. The head will be a maxima n47 which I will port or have ported and I will likely go with 45/36.5 mm valves.
Looks like this would result somewhere around a 12:1 compression ratio which will fall a bit with unshrouding etc. What cam is realistic to keep Det at bay running 99 RON without sacrificing ideal ignition timing?
Perhaps I am looking at this the wrong way round, eg choose the cam and build around that eg the cam kit sold by mike .560" lift and 300 degree duration- what cr would be ideal.
Any particular manufacturer or specialist that would be recommended? kaminari, Datsun spirtit, Les colins etc
I realise these are some very specific questions
Thanks