What kind of power ?

[capri5.0]

I just bought an xr4ti and I am wondering what kind of power is this engine capable of. I have 2 extra 2.3 turbo engines ready for rebuild. What will it take to make 1 of these engines put somewhere between 375-450 rwhp

[Black92LX]

Take a look at the FAQ on this site.
Has a good explanation of what it takes to get what HP level.
http://www.stinger-performance.com/faq.html

What mods do I need for "X" hp?
All combos are assumed to be utilizing the best "stock" setup which includes 35lb injectors, large vam, 87-88 ECU, stock or ranger roller cam, and most importantly, a good tune.

-Stock engine, stock intercooler, no significant mods, 15-20psi will produce roughly 170-215rwhp.
-Above setup plus cone filter, 3" exhaust, 15-20psi will produce roughly 200-245rwhp.
-Above setup plus front mount intercooler, more timing/boost, elevated fuel pressure, 255 lph fuel pump, ~22-23 psi will produce roughly 265-280rwhp.
-Above setup plus ported or gutted intakes, mildly ported head, ~22-23 psi will produce roughly 275-300rwhp.
-Above setup plus professionally ported head flowing 215+cfm on the intake, extremely high fuel pressure, ~22-23 psi will produce roughly 275-330rwhp.

Below requires upgraded injectors, piggyback ecu tuner or stand-alone ecu, and preferably conversion to mass-air along with race fuel or alky injection.
-Stock engine, turbo header, professionally ported head flowing 215+cfm, cone filter, 3" exhaust, 255 lph fuel pump, ported/gutted intake, large aftermarket cam, ~25-30 psi will produce roughly 350-450rwhp.

Below requires many unmentioned items plus a standalone EFI system or a very firm grasp of tuning a piggyback system.
-Above mods plus Upgraded Rods/Pistons, 225+cfm iron head or Esslinger Aluminum D port head, ~25-30 psi will produce roughly 400-525rwhp.
-Above mods plus Esslinger SVO head, Stage III or larger Bo-Port cam, ~25-30 psi will produce roughly 500-600rwhp.
-Above mods plus Esslinger ARCA head, Stage IV or larger Bo-Port cam, 2.65L+ stroker engine, ~28-35 psi will produce roughly 650-800rwhp.



Good luck with your build. I just picked up a 2.3T motor this weekend and have a tranny on the way and need to get a chance to pick up the intercooler from a fella on here.

I am shooting for 300-350hp to the wheels once I am finished.

For 375 and above you will need to go with the Megasquirt for tuning,
http://www.wilsonracingms.com/

They are capable of making 600+ hp some expensive work.