[mechanic1025]

I see this question just about everytime I check the 2.3 threads, Its how to improve performance from your 2.3 n/a without goin forced induction.

-First off remove the air silencer or get a cold air intake.
-Get and K and N air filter.
-Remove your cats or get a high flow cat
-Get a header like exhaust manifold off a 2.3 ranger
-A chambered muffler will add a more aggressive tone and might improve power.
-You can get a larger throttle body but some minor modification may be needed.
-Port and polish the upper and lower intake manifold, port and polish the head and give it a rebuild or buy a rebuilt one off ebay.
-Removing the a/c will shave off some weight but the hp gains would be minimal if any.
-A small shot of nitrous is always possible.
-Some 3.73 rear gears

With these mods your 2.3 should be good to go and keep you busy untill you want to go Turbo or swap.

[TOM RENZO]

Pull the head and mill the snot out of it. That will increase the compression. port and polish the head along with bigger valves. Install a good aftermarket header and high flow cat with no muffler. If its auto convert to a 5 speeder. Adjustible fuel preasure reg and install a performance cam and adjustible cam gear. That would give you at least a 60 HP gain +or- a fiew.