POSTED BY RED SVT
"The testing found that the engine DID NOT respond well to modifications in fact they said there was very little difference by modifying it."
Very interesting reading but I would like to respond by saying that I do not think this has any relavence to most of us. As far as "very little difference modifying it" the phase I & II engines dynoed at about 230 HP (both were 2L) or about 115 HP/L. While not race car competative in 2L form, this is alot of HP/L. (As an asside the Capaldi Cougar guys and others have made over 300 HP from 2.5L versions, or 120+ HP/L so the limitations may be somewhat unique to the ultra short stroke 2L). The key limiting factor if I understood was shunting of intake charge to exhaust ports. I think this is probably a phenomena limited to very high RPMs (8000-8500RPMs) if Im not mistaken, not the sub 7500RPMs we are concerned with. Terry H. comment??
Several mods including the Y-pipe, many catbacks have made very good dyno proven gains. More than on many other cars. Others such as headers and MAFs may need A/F tunining to sort out the gains. A GOOD ECU upgrade would help. The article is a good lesson on flow velocity though - wonder why the big T-bodies arent working well ? Did you see the size throttle they uesed?
