i bought an evo recently and it has a cutoff, and the person i bought it from said that it was tuned with the cutoff open, but i like running it with it closed because i like it quieter, and he said you shouldnt floor it, but im figuring the backpressure cant be that bad? am I wrong? thanks

 

I would assume a cutoff would cause boost spike, thats probably why the guy said dont floor it, but we all know assumptions are the mother of all f*ckups.

This happened in my DSM with its primitive boost control solenoid with an open downpipe. I had custom exhaust made and it was fine after that.

 

log the car and see what it looks like

if you have a stock exhaust...i would definitely advise against beating on it with the cutout closed

 

its not stock its a custom exhaust, so that might help

 

To be sure if the air/fuel is fine is to have it logged and then looked over by a tuner either somone local or you could email the log to a tuner to have it looked over and they can tell you if its safe or needs to be adjusted the way you drive it.

 

a cutout wont hurt anything when the car is tuned for it
evos with cutouts are just so obnoxiously loud. trade the cutout for a test pipe

 

^ couldn't agree more

 

allright thanks for the imput

 

Dont do it!!!

 

just have it tuned again once you upgrade and lay low for now

 

also my tuner said the with it open it would run more boost but closed it wouldnt so IDK how that might help