Quote:
Originally Posted by GENESIS
+1 on the cams there might be a couple of hp gain if the factory cams was a bad design but overall it just moves the horsepower &torque curve up,the more aggressive the cams the less low-end drivability you will have,plus a higher idle,allot of people think it there's a true hp gain when you buys cams but the truth is your low end is robbed so you can have a better high-end on the dyno,a true hp gain is a gain all around the rpm.same thing with bolt ons
its just for efficiency,true hp is increasing displacement, compression, pressurizing the combustion chamber which is turbo or supercharging.
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It's not so much if there is a bad design then what the motor was designed to do. The 5sfe was designed to not be a direct competetor to the 3sgte and instead be a good motor for moving the heavier mkII/Celica chassis around with the performance of the average lower model sports car of the time.
You're right there is in fact a loss when moving up to 294 cams, it's just below where most dynos are measured. The only time you operate in that range is maybe puttering around a parking lot or in rush hour traffic and you will almost never be using 100% of the engine's power. Move up to 101 cams and you start to see the loss in a more noticable range but with the other mods you will probably do when stepping up to that aggressive a set of cams, you will still have more torque down there then the average 5sfe.
Horsepower is the measure of work done over time. Adding the cams does in fact increase HP. In addition it allows you to hold the torque further into the revs thereby letting you use the torque multiplier of your lower gears to do even more work.