a 2003 evo 8 with full 3" exhaust, air intake, and pushing 24 psi..with those mods and no ECU flash or tune what would be the horsepower..just looking for ballpark numbers kinda did some math myself but not 100% sure so asking for assistance here

 

Without a few dyno runs this isn'tpossible to determine because there are quite a few factors. As a ballpark figure I would say between 285 - 315 horsepower. I believe the stock 2003 Evolution puts out 271 horsepower.

 

I can tell you stock in my 03 evo i put down 245hp and 246 tq. This was on a dyno jet dyno. But like he said it will vary. Dyno jet or mustang dyno will give u a big difference too.With no ecu reflash ur going to be hitting boost cut alot and running pretty lean . The 03 evo fuel pump is weak. I'd say about 275 to 300whp. Do a reflash and upgrade ur fuel pump and you'll be looking at 325-350 whp.

 

ya sorry forgot to meantion that do have a 255 walbro fuel pump since the stock one i heard sucks for the 03s. but thanks for the input now im just trying to decide wether i should get my ecu flashed and tuned at the one tune shop here with an awd dyo or send my ecu in for a flash..only thing is this is my daily driver so i dont want to not have a car for a week

 

where are you located ?

 

colorado springs, colorado where the air is nice and thin and 12s cars actually require work lol..but i do beleive the only place in town with an awd dyno is a place called revolutions tuning cuz i had my gsxr there before i sold it

 

you only making like 260 at best. your actually prob slower than that because having exhaust and running 24PSI is a bad idea on stock tune. your killing yourself. you dont need to dyno to get a good tune. you can get a ECU mail in and trust me its worth it. or just buy a SAFC and widebandand tune it yourself

 

yes he is hitting boost cut prob every time its cool outside and floors the gas from low RPMS , however its not running lean. The Evos stock tune is Waaaayyyyyyy to rich and the more bolt ons you do the more rich they run, the boost will lean slightly but not enough the cars just run pig rich out of the box

 

awesome thanks for the input, any idea what i would run HP wise with a flash/tune with that setup not necceserly to the wheels since ill pass on the dyno if this shop is just willing to flash/tune

 

close to 300whp after a flash with timing and fuel maps tuned in for your mods. average flash get about 30WHP gain even on close to stock cars. Its one of the best mods when your starting out with some bolt ons. Trust me you WILL feel a huge difference