would i have to flycut?
#13
RE: would i have to flycut?
Lift isn't really what gets you in trouble on piston to valve clearance, it's valve timing. The Comp nitrous cam is a very aggresive cam compared to the Comp cam. The Comp is going to have more overlap to help with scavenging (I think I spelled that wrong). The intake valve normally chases the piston but while the exhaust valve is open and the piston is on the way to TDC the intake valve cracks open and the rushing air going out the exhaust valve helps to start pulling the incoming air fuel mixture in. That is where the contact between the piston and valve happens.
#15
RE: would i have to flycut?
B-303 overlap events @.050" tappet lift during overlap:
Intake open = 5° BTDC ---- Exhaust Close = 5° BTDC
NX274HR-14 overlap events @.050" tappet lift during overlap:
Intake open = 2° BTDC ---- Exhaust Close = 0° BTDC or TDC
Piston and exhaust valve will be "closer" to each other with the NX cam...... it needs to be clayed as 92GreyGT mentioned..... just to be $afe.
Intake open = 5° BTDC ---- Exhaust Close = 5° BTDC
NX274HR-14 overlap events @.050" tappet lift during overlap:
Intake open = 2° BTDC ---- Exhaust Close = 0° BTDC or TDC
Piston and exhaust valve will be "closer" to each other with the NX cam...... it needs to be clayed as 92GreyGT mentioned..... just to be $afe.
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