i agree...Erm... For me, I think adjustable pulley is not v good for everyday car la... Because by just advancing/retarding the timing, there is little power gain. Got la.. But not so much... The obvious effect is the shifting of the powerband. This is because earlier opening or valves also result in earlier closing. The lift, duration and overlap is unchanged. Thus power gain is minimal and the main function is shifting the powerband, either higher up the rpm range or lower. Why not save up and get camshaft?
For intake... Nothing more than 272 is best. 260 is fine too. More low end torque. 272 is minimum for good idle and low torque. About exhaust, I don't know. any sifu can advise on this? :hmmmm:good one . usually which cam profile better ?
272/272 or 270/260
heard 270/260 timing idle better , any comment ?
Bro... first, you plan to go NA or turbo? If youplan to go turbo, don't go for too much valve overlap. If you plan to go NA all the way, chose max overlap. But still depends on how much low-end torque, FC and city drivability you willing to sacrifice la...hmm now i am confusing for Exhaust Cam..
dont know whether should choose 272 , or 260 ...?
pro fren say exhaust 260 would stable for idle for air cond
another racer fren say choose 272 for exhaust , FOR Turbo engine ..
need more advice from pro ^^
interesting question.. cuba citer.. cuba citer..mine is 4g93 gsr turbo ..
u mean dont go too much valve overlap .. means i should choose 260 or 270 for exhaust ?
haha , thank u
All I heard before is that if want to play turbo, there should be minimal valve overlap. The intake should stay open longer but exhaust should be should be shut earlier to prevent boost leak. That is for turbo. However, I can't advise on the exact duration and lift as I have no experience on this before. Hope other sifus with experience can give input.mine is 4g93 gsr turbo ..
u mean dont go too much valve overlap .. means i should choose 260 or 270 for exhaust ?
haha , thank u
No bro... I suggest get opinions form sifus who got experience...ooo.. finally i understand you
u suggest me take 270/260 .. ?
tq