need advice from experience

[cryionics]

hi all sifu
i alreadi change my pipe to s pipe but i got few q running through

1)after change cam pulley while engine is idle will the rpm go up?
2)wat does actually 421 contributes for pickup,mid range or top speed?

if i install above this part what is the result i roughly get

 

[speed2horizon]

hi all sifu
i alreadi change my pipe to s pipe but i got few q running through

1)after change cam pulley while engine is idle will the rpm go up?
2)wat does actually 421 contributes for pickup,mid range or top speed?

if i install above this part what is the result i roughly get

Click and read

Extractor thread.

 

[cryionics]

so it means after install 421 it will give u pick up and mid range wat bout cam pulley?and wat type of 421 i should look for hotbits or ssteel? how do i mod this application cam pulley and this 421?currently in pg now

 

[speed2horizon]

so it means after install 421 it will give u pick up and mid range wat bout cam pulley?and wat type of 421 i should look for hotbits or ssteel? how do i mod this application cam pulley and this 421?currently in pg now

It depends on DOHC or SOHC. The cam pulley can advance or retard the exhaust timing. Incerase the overlapping or reduce the overlapping depending on the condition of your modification. There's just no too much help on a SOHC.

 

[cryionics]

thanks a lot sifu
as my conclusion i will go for 421 then cam pulley and experience the different