So you would have to make all your own set up? To mount and everything? I would rather buy a set from efi hardware or injection perfection. Save alot of screwing around and ready for everything to rock and roll. Plus I got a g200z. 134hp atw. Going e85 and itb's and quad coil end of the year will let everyone know how it goes.
Yes you would have to make your own setup but thats the price you pay with a DOHC. Im going to assume by your power output your running twin webers/dellortos in which case you would already have the manifold to suit the injection perfection/efi hardware throttles. That would also mean you wouldnt have to weld on injector bosses as the new throttle already has that.
Unfortunately, us DOHC guys dont have the same luxury, however we DO have some advantages [besides the head flowing better standard then most modded SOHC's].
Unlike the Z series the W does not have the thermostat or water running through the inlet. To adapt the GTR throttles on, all it would take is 4x flanges [2x gtr mounts, 2x DOHC head flange] and some pipe. There are no bends to worry about and the port spacing is paired [refer to diagram above]. All that would be left is to do the bosses for the injector and the linkages. Also note that weber manifolds for a DOHC dont fall out of trees, and most aim the carb smack back at the master cyl which is not something you really want.
like someone else said dont compare webers with throttle bodies since there is no venturi. i gained 10 hp by moving the injector further away from the port.
Also a ported G180W port is about 38mm so if you want to go much bigger in throttle body your better off with a tapered throttle body and runners on a slight angle to clear the shock tower with a raised port roof. also lots of bracing to stop the manifold cracking
What are guys doing for your bigger cams billets or regrinds?
You sure Tim? Mine measured @ 40mm and it hasnt been ported before [that or perhaps im blind?]. As for cam ill be going regrind, cdtpf60 [Paul] has found me someone that can grind em