Cheapest ways to increase power
Hi Raleigh Rocket: You suggested milling a 225 head 0.100 to increase power. I want to mill my head but have a couple of other questions if you don't mind. My current compression is 8.2:1. What will 0.100 mill raise compression to? Can I use all stock valve train?
Peace,
Taz
Well here it comes, I love math. A stock 225 has a bore of 3.40 and stroke of 4.125.That makes a swept volume of 613.7cc. And an 8.2 C/R would be 613.7 /7.2 =85.24
TOTAL combustion chamber volume.
Okay, now,I don't recall the shape and size of the slanty chamber, cuz I've never been into them, but Ima gonna guesstimate that cutting the chamber.100 will be about 13cc.
So 85.24 less 13cc =about 72cc,
total chamber volume. Then (614+72)/72 yields 9.5 the new CR.
This is a math only exercise, and compares the Total chamber volumes.
That's what I built my one-and-only slanty to. It helped a bit.
But; if you wanna take off briskly, there is absolutely no mods you can do to your NA slanty that will wake it up, like gears. NONE, ZIP,NADA. Going to 3.91s from 2.76s is 3.91/2.76=Plus 41% increase in torque,ACROSS THE BOARD, and a much, much, quicker romp thru the gears. If you have never had back to back rides in a car with this much gear swap, it is phenomenal!Your slanty will feel like it grew 92cubes and became a teener.
OOPs
The sacrifice is no more comfy hi-way cruising, and no more saving gas, cuz 65 will be pushing 3300rpm. Thats a lotta buzzzzzz. But that is the penalty for the lack of cubes.
Oops
