esky79
Jus a quick question... R the standard cossie inlet manifolds that good? I jus seem to notice every 1 making decent power still runs them and not many people get a custom 1 made or aftermarket etc...
The standard 2wd manifolds with a plenum spacer will make about 430ish hp at the flywheel so they are well capable. There is room to improve on the design which was done by a guy here in oz with great success, though the improvements are more about mid range than peak power.
4x4 Saph manifolds are next best from the 2wd, they will make a few more hp, then the Small Turbo Escort Cossie manifold which is reputed to be good for 500ish hp, I think most likely due to the 60mm throttle body and elbow over the 55mm used on the 2wd and 4wd manifolds.
RS500 manifolds are the best of the std type, claimed to be good for 600hp, I think RS500's run a 65mm throttle body.
For a road or track car, std manifold will deliver more hp than you can use...;)
My old 2wd manifolded engine would produce enough to wheel spin coming onto boost in 4th gear on a cold night!!
Cheers,
Phil.