Originally posted by am
Hi, need some help.
I would like some moore revs in my P5 and learn from experience that if i open start of inlet timing on crank i get some moore revs on top. i did not get any change on bottom end.
If i open closingtime on crank will i loose any bottom end torque? I do not have a large numer of cranks to mod that is wy i am asking.
Thanks
Hi AM.
Sorry, I don't know what is P5 means, never had one in my hands. Closing of induction timing is one of the event which working in tandem with tuned pipe and it is realy helping on top RPM. But over cutting will defenetly kill torq, so if you stay within 65-67 degree you should be OK. On closing don't go bellow 35-everything bellow 35-makes engine realy reach on bottom end and it will some sort of hel to tune for punch out f corner.
If you find somewhere thread named engine modding ( or so) in this zone ( nitro zone), I put there very good link to one German airmodeling side with good testing ### and it will help you understand how it works versus crancase pressure.
Edward