ShawnMua

Hi, I saw some threads here on the forum about the 8 with an exhaust cut-out but not like I'm thinking. some people claims to have over 10hp+ (after cat) with this cut out (there's a thread with expired dyno pics i couldn't see ) but from what I've seen/read/researched and my piston knowledge keeping it open will kill your low-end tq. <- the why i dont do straight pipe besides the annoying sound

I've been thinking about placing one before cat (working on the design) RPM activated @ ~4500rpm so its completely open at 5krpm+ and keep that extra power and sound .

The flames are covered for now, since I know there's going to be lots...

the "system"will be something more like the boosted (psi activated) cut-out, without boost.

Anyone done this before?

thoughts?

Hints/Ideas?

tnx

SM

EricB

iTrader: (7)

kind of like this??


I dont like any type of back pressure in the exhaust.. so i wouldnt do it..

i like the last line in your sig btw.

ShawnMua

Thanks, I don't like the heat lol (getting flamed)

(basically the same thing but with something like a QTP in front of the cat)

I checked that one as one of the options but for it to work like I want (imo, correct me if I'm wrong) would need to be straight pipe and when closed I think it may be smaller smaller than the hem exhaust which might do more backpressure than the catalytic.

Ps. I don't want to get into the backpressure science, I've been a lot of time reading/researching about it

As for the straight pipe setup, I tried it just without muffler (oem exhaust/midpipe) and was to loud, kinda like "come at me cop" loud lol. not my type for street car (constant sound)

thanks again!

Every comment is welcomed.

SM