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Boring out .020" on the cylanders is more to ensure that the cylander walls are perfectly round so you get a good seal with the new rings. There is a very slight increase in displacement, probably only a cubic inch or two (a Chevy 350 bored .030" gaines 5cid, we are not going to gain much displacement).
The higher compression is good for a gain of about 3-4% per Compression point raise, so it's a mod that takes advantage of all other mods you have. 10.5:1 should be no problem just doing the rebuild. I would suggest some form of timing control at a 12.5:1 rebuild. Give yourself the ability to retard timing in case of detonation. An S-AFC or some other form of fel control would be a good idea as well. Give yourself the ability to tune in the high compression motor, and make sure she's running right.
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Michael J. Kulaga
e-mail: Michael_97RS@2gntDSM.zzn.com aol IM: MJKulga
http://highlander.dsmpower.com/
Injen CAI, 55mm TB, Hooker 4-1 Stepped Header, GS-T Muffler, AFX UDP, S-AFC, 8.5mm Magnecor Wires, Crane Fireball HI-6DI2, SS Clutch Line, NRG Susp. Motor Mount Ins., FU/RU/RL STBs, TSW Blade 17x7.5, Bridgestone Potenza RE730 215/45ZR-17. Front KVR Cross-Drilled Rotors & Carbon Fiber Pads
To Be Installed: Ported/Polished Intake Manifold 1/2, Rear disc brake conversion kit w/, Rear KVR Cross Drilled Rotors & Carbon Fiber Kevlar Pads, SS Brake Lines
Firefly:
Mal: You don't know me, son, so let me put this to you plainly: If I ever kill you, you'll be awake. You'll be facing me. And you'll be armed.
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