I am wondering what bolt on mods could be done to gain around 400hp. And a rough cost including labour. Is it cheaper and more reliable to go Naturally Aspirated (sp) or Forced Induction?

Lancer

 

on a 5.3? to get 400wrhp will be near impossible, and if you did wouldn't be very fun on the street unless it was nitrous that gave you that 75 extra hp. If you go with a good bolt on FI system you can get 400 reliably.

 

It's doable with the 5.3L but will take $$$ and some good parts. Being that you are a
2WD helps but these trucks absorb quite alot of drivetrain parasitic loss compared to GM cars like the Fbody's C5-6, etc.... I made 420rwhp easy in my LS1 with a small cam and relatively cheap heads.

With the 5.3 you will need a very good set of heads, AFR 205s, TFS 215's, etc, 11.0-1+ SCR, cam in the 230+ duration range. This along with LTs, ASP pulley, ported TB, intake and exhaust with tuning would put you damn near 400rwhp.

Or spend the money on a blower for an easy 400rwhp.

 

im shooting for 400rwhp na also, with the mods in my sig i am putting a little over 300 to the wheels right now. i am planning on buying some tsp stage 2.5 5.3L heads, a custom grind 224 cam and ud pulley. with more tuning what should this put me at?

not trying to thread jack but it looks like we both have the same goal....

 

is there a 5.3 that has reached over 350rwhp yet? Not saying impossible, just saying the cam, intake, converter etc to get there might make it a little less fun under 4000 roms. No?

 

NA i have seen a few 5.3's around 360rwhp, thats the top end though. 340-350 is were bolt-ons and a good cam can get you, then heads will offer a little more

 

one of those valley guys made over 400 hp in a 5.3

 

You sure about that? I just put down 325 on the dyno and I've got alot more mods than you...

 

dyno readings vary. Thats why the track is the only true measure. Dynos are good for comparing mods and tuning. I made 339 with 224 cam and bolt-ons with no UDP.

 

my truck put down 280 this summer, since then i got a p&p throttle body, deleted the cats, got it tuned and a couple other small things so i cant prove that i have 300 rwhp but im pretty sure i do