Can we not use the exhaust cam on the Inlet side? My Mate is just doing this on his CA18det. Also having Different cam sizes is better rather than 264 on both sides.
ive never tried this but have heard good reports on doing this mod, also by fitting vernier pulleys and dialling the cams in correctly will give you big improvements but a lot dont bother on gtir as its so awquard to do as needs to be done on rollers really to fine tune the cams and that means you have to keep removing the rocker cover etc which all takes a lot of time so can end up a real expensive job.
also you will not get the best from the cams unless your head is ported and flowed correctly (not a dremel diy job lol) once again not cheap to get done!
in a nutshell ive toyed with a few various cam set ups in the past and one thing ive learned is that the 264 duration is about the best for gtir road and circuit setup.
basically the bigger the duration the further up the rpm scale the spread of power becomes apparent
i (first engine build we ever did) used piper 278's and found the power was unusable as it was all above 7,200 rpm with nothing down below except big lag ....these would have been ideal in a high revving type engine or full on drag car from 0 to wot but totally useless in an R which lets face it dont like being taken above 8,200 without risk of valve bounce and rockers flying all over the place lol.
with the 264s you get the best of both worlds, low down grunt and good midrange pull right up to when you change gear which is why i will continue to use them.
just my opinion, im sure others may dis-agree but i just go with what i know and have tried myself!
