AFR 61cc - 66cc???
09-18-2005, 07:53 AM
#2
TECH Senior Member
Ok, I'll make it simple.
milling is removing material from the head deck (where the chambers are); that is done with special grinding machines to keep the surface straight.
How does milling help us modders?
Milling does 2 things for us modders:
1- By milling it is making the chambers smaller which increase our compression. on average, every 1 point increase in compression, increases power by ~4%.
Expl: If you have a motor at 10.0:1 compression doing 300 HP, and you increase it to 11.0:1 compression, that motor should make 312 HP.+/-
2- If you have mild scratches or light warping, you can mill and get rid of the scratches and/or straighten the head deck.
Of course too much milling can have adverse effects also:
1- reduction in head flow
2- Piston to valve interference
3- Intake fitment issues.( intake port of heads not alligning with intake manifold ports)
milling is removing material from the head deck (where the chambers are); that is done with special grinding machines to keep the surface straight.
How does milling help us modders?
Milling does 2 things for us modders:
1- By milling it is making the chambers smaller which increase our compression. on average, every 1 point increase in compression, increases power by ~4%.
Expl: If you have a motor at 10.0:1 compression doing 300 HP, and you increase it to 11.0:1 compression, that motor should make 312 HP.+/-
2- If you have mild scratches or light warping, you can mill and get rid of the scratches and/or straighten the head deck.
Of course too much milling can have adverse effects also:
1- reduction in head flow
2- Piston to valve interference
3- Intake fitment issues.( intake port of heads not alligning with intake manifold ports)
