(420a engine)
How much gain will I have in hp if I buy
*55mm throttle body
*Throttle body spacer
*High flow intake manifold (says 70% more flow than the stocker)
*K&N intake
*full 2.5 exhaust with no cat
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Not much, I'd say you would get abt 25 more h/p and thats being generous.

 

yeah you're not gonna get a lot out of an n/a with small mods. a little but not enough.

 

20 maybe?

 

yeah if hes lucky

 

35psi [&:]j/k


better just get a turbo kit bro

 

if you go turbo, it aint gonna handle much boost, my cuz blew his pistons right out at 12psi, or so he said it was 12, and if you do turbo charge it, i suggest checking your compression to see if you got bad piston rings or valve seals, and any other seal or gasket.... then you go to your fuel delivery system, since you is gonna have all this extra air rammed in, you is gonna need the right fuel delivery system to keep it stoich or near stoich. you know what they say " lean is mean". is hard to come back from a lean mixture once it's too late. and you need the correct plugs too.