Whats the diffrence performance wise between the 2 diffrent cams i have itrs on my motors now which is a itr..with rs machine jdm itr pistons ported and polished head and port matched everything with tri y header with 2.5 exhaust with apexi n1 muffler..are the spec 3's worth getting and will i notice any diffrence

 

YES YES YES!!!! compare the specs of the cam n ull see what im saying. u may want to upgrade the inner springs on the valve springs tho.

 

even thou its itr full vavletrain

 

yea they might be a little too big to rev with the itr stuff. i think u can use portflow inner springs and itr outer springs and ull be fine.

 

also what compression is the motor? IMO stock compression motors such as the gsr and B16 didnt seem to like the cam as much as a motor with something slightly higher than 11:1

and yes you will want to swap springs and retainers as the lift is high enought to bind some stock springs and also the seat and spring pressure is not really strong enough to close them fast enough at higher RPMs

 

wheres a good place to buy inners at..i need to get rid of my itr cams before im going buy bc 3's they are for sale or trade for 275

 

motor is all itr i swaped the pistons and did jdm itr ones so i got a lil bump up from stock cr just want something that pulls alil harder then itr cams but is still a good daily driver

 

buy the springs online. inlinefour.com has them but im sure u can find them at a btter price elsewhere.

 

You may want to sell the cams, springs and retainers and go with the buddy springs and retainers. BC was having a hard time shipping retainers. and if they still are out of stock the KMS titatiums are a perfect snap fit for the buddy springs. A tear down after about 5,000 miles showed they did not move or wear at all on the springs.

A little more compression would help, but if you don't want to pull the motor, you could do a thinner head gasket.

 

^^^ +1 i was gonna say some flat faced bc valves and a bc head gasket n valve train would really be the best way to go with that itr and those cams. the head flows well enough as is. thatd be a great motor with that setup.