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Work on improving the valves, get a higher lift cam, roller rockers etc.
A Chevy 305 with a roller cam will have MORE power than a 305 with a flat tappet cam if both are installed in the same engine. The horsepower of any 305 depends on what all is done to the engine. Changing from flat tappet to roller will gain some. There are other ways to increase horsepower and there are other ways to increase torque.
Anything that replaces factory. You can tune it, add cold air induction, change the headers,exhaust,and cam. You can actually gain about 70 horsepower with no loss of fuel mileage.
you wont gain any horsepower, you will just gain more noise
by upgrading your engine.
3-5 horsepower
what can be added to gain horsepower to the air intake of a 2.2L Pontiac sunfire?
How much horsepower gain from 2 super 44s flowmaster on a f 250 with an 351 windsor
Roller rocker arm. The rocker are in the head that transfers the camshaft action to the valve. Opens and closes the valves. On a roller rocker, there is a small roller on the lifter end of the rocker arm. Some small gain in performance due to lack of friction. Very small. In a complete engine overhall where everything is done just right to improve performance, each little bit can have a combined affect that does improve the overall performance. Changing the rockers by themselves is not wort the expense.
Exactly 25 horsepower. No more, no less. That is final.
by changing your horse power voult
eight hp