#113057, "RE: Camshaft discussion & comparison (Continued)" In response to In response to 9 Jul-11-05 04:30 AM by cougar694u
Originally posted by WIDECLIPSE Bleh, those are for the 4g's. We need some specs to make something for the 420a. I don't know if you could just copy some cam specs from a 4g63 or what. Being two completely different engines, I wouldn't think so.
Why not? The cam specs are just calculations for valve timing. It only defines when the valves open & close, and how much they open. Theoretically, you could use any specs you wanted, as long as they provided the proper environment for the motor to run. You could design one to have a good amount of duration, lots of lift, and greater lobe seperation so there's less overlap.
Unfortunately, there's no real way to know how it will react. You can go on speculation, you can also go by DesktopDyno, but neither are precise. The simulation program's probably your best bet, but like I said, you never know until you actually run them.
You could start with the 4g cams, knowing they're designed for boost, then customize them. It could be a start.
**EDIT** Anyone know the 4g stock cam specs?
~Luke Facebook 1969 Cougar - 11.91 - 380HP 2007 GSXR 750 1999 OZ - SOLD - 15.26 NA - 14.71 on 75 shot
