" over bored, full counter weight crank, big cammed, large valve high compression headed s20 twincam"
Can you share with us when and by whom in Japan this was done - some of us are kinda techincal anorkas and our knowledge of such a rare bird here is obviously inferior to yours considering your experience and contacts.
Sean, I don't think you'll get any direct answers to such questions. With all due respect to Dave, he's a business owner who has sourced a car for a client and this will naturally take precedent over any personal enthusiasm he has for the cars. I think it would be correct and fair to say that the publishing of the photos and description of the car on Facebook is done to promote a business rather more than any other concern...
The car in question is 'known' to marque enthusiasts and fellow 432 owners in Japan. It's a comparatively small world, and the majority of still-extant cars are known about and documented. Its chassis number is '
PS30-00105', and some of the (somewhat bizarre) modifications were noted when it emerged from a 'restoration' in 2010.
I'm surprised to be reading claims of big overbore, a full-counter 'stroker' crank, "big valves", high compression and high lift cams etc, as the engine was still largely stock and unmodified when last noted in Japan. The "big valve" claim is an interesting one, as there really isn't much space in the S20's four-valve 'head to increase valve sizes and it isn't strictly necessary anyway. The claims for engine mods are all the more surprising when the car is still - clearly - fitted with the stock Mikuni N40PHH carburettors and the stock tubular exhaust manifold (although that's been heat-wrapped). One of the first rules of S20 modification is that the OEM carburettor setup is fairly restrictive and sizing-up is greatly beneficial. The stock exhaust manifold is a little restrictive too, and any stock S20 - let alone a 'stroker' - would benefit from a re-shaped and perhaps slightly bigger manifold.
I'm pleased to see an S20-powered Z in the UK, and there's room for plenty more S20-powered cars here too (it would be nice to have the full PGC10, PS30, PS30-SB, KPGC10 and KPGC110 'set' over here) but they are sought-after, expensive and in short supply. Owners have every right to modify cars in any way they see fit and to their personal tastes, but with rare examples of the breed it's always nice to have a genuine, correct and pretty much stock example on hand as a
reference point. I hope this car goes a little more in that direction from here on in...
