02-08-2007, 05:44 PM
[doorpeek] wondering if a 3in exhuast from my hfc to tip would make any hp/tq gains? also would it sound like crap? this is on a n/a svt with tb, sri, tune, RT/hfc. this would be custom from a muffler shop. If anyone has tried this please give feedback. Thanx!
02-08-2007, 06:45 PM
The only real numbers we've seen so far with a 3" exhaust were ~7-9hp/tq from 3" piping straight back off of the header.
02-08-2007, 07:27 PM
i would spend your money on something else. the stock SVT exhaust is a straight through design and flows well. i would replace the cat with a ORP.
02-08-2007, 07:37 PM
you already have all the little bolt ons so why not it will produce gains as dynoed by tom...esp a good idea if your looking to go turbo in the future.
02-08-2007, 09:15 PM
I think it will sound good. Mine sounds good off the Offroad-pipe. Search the svt forum for 3" exhaust vids (i posted quite a few). Also, your talking about an "exhaust shop" who normally crush bend your exhaust. So you may be starting with a 3" pipe, but if its crush bent your through diameter will only be around 2.5" through the bends.
I am a huge believer in Mandrel Bending (computer bent piping which keeps its inner diamter same through the bends) which is what im using and love it.
02-08-2007, 10:44 PM
Tom has dyno proof of the gains in the Focus Power forum.... I would do it again.
02-09-2007, 09:34 AM
Tom removed the catpipe for 3" straight piping which added to the numbers a lot down low, but the 3" all the way back definitely added to the peak numbers.