i have a ls with a t3 turbo...stock block pushin 10 psi (boost spiking) i was wondeing about how long or short should i have "left" my downpipe...it had a custom 3 inch pipe pretty short...and loud...i couldnt stand it having neighbors complain about it being that loud (so i got it welded at a muffler shop a stright pipe with no cat no nothing from the down pipe all the way to the back ...now since i did that did i lose hp? since its a longer downpipe than compared to my short downpipe i had? people say the shorter the better...but..i coudlnt keep it like that cuz of complainin people next door

 

pls help me out

 

As long as your exhaust pipes are straight you would not lose any or much horsepower at all. All the air is doing is flowing back through some straight pipes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96B_97E &raquo;</TD></TR><TR><TD CLASS="quote">As long as your exhaust pipes are straight you would not lose any or much horsepower at all. All the air is doing is flowing back through some straight pipes. </TD></TR></TABLE>

Agreed...the only hp decrease you might have is maybe a small unnoticable amount. In your case keeping your neibors happy was probably worth the little (if any) decrease in hp.