WS6HUMMER

iTrader: (19)

Can I get by running an open down pipe on the street? Anyone have a sound clip? How short can a down pipe be safely? If it matters I'm running a 4" DP on a T4 flanged 76.

Hennytime

iTrader: (33)

just do it!

WS6HUMMER

iTrader: (19)

LOL! I really want to but dont know how crazy loud it would be.

SPRAYED 01

iTrader: (22)

I dont think its going to be crazy loud. Im running a cutout kinda close to the end of the DP and its not that crazy. I drive around Downtown Chicago like that all the time. Its quiter that an n/a car running open headers.

Hennytime

iTrader: (33)

i run a cutout on my n/a setup and its not bad, id imagine it being like an open y pipe with less rasp

Mike@Diablosport

iTrader: (2)

Heres a vid of a C5 making 786 rwhp on the dyno...no mufflers, twin PTE 67s...3" pipes with turn downs.

http://www.frequencyequalsbass.com/d...chaos_dyno.mp4

Hennytime

iTrader: (33)

do you use a diablo tuner for that or did you use hpt or efi?

Pro Stock John

iTrader: (34)

The younger you are the more tolerable it is.

Here is a 4" downpipe with a 4" bullet that went to the rear end...

View Video on FQuick

WS6HUMMER

iTrader: (19)

Thanks, I think I'm gonna try it open all the time then, the vids really helped. I'm really supprised at how quiet "Dragula" was.

Frost

iTrader: (45)

I was gonna ask if someone else didn't

Roadie

I recently pulled my turbo stuff off and put on headers, y-pipe, and GMMG. It's a LOT louder now than it was with a T76 and open downpipe.

Pat-Man

iTrader: (3)

Running open downpipe as well. My WS6 with LTs, 3" ORYP, cam and cutout was much, much louder. You can always run a cutout and electric plate if you are too worried.

VENGEANCE

+1

Im going to run an open downpipe on mine. I used to run around town with two straight pipes off the headers coming out either side. The cars going to be quieter with the turbo.

Reject

iTrader: (24)

mine is just 3 inch pipe all the way to the rear end, i love it. quiet around the block but when you get on it it's nice and loud

i know sidewayz runs a open DP right to the k member on his daily

frcefed98

iTrader: (16)

View Video on FQuick


Open DP and then going through a full cat back.

J

7845

iTrader: (1)

i have a full 4" back no muffler and exits in front of tire. my setup is louder then my NA stroker with duals and magnapaks

WS6HUMMER

iTrader: (19)

Thanks everyone, very helpful!

Silver_TransAm

iTrader: (2)

Damn what kind of cam do you have? sounds wicked.

1CAMWNDR

iTrader: (21)

WS6HUMMER, what is the status of your build?? If you dump the DP right under the driver's or passenger's seat it will be louder to you while driving. If you run a 4" pipe out to the tail, then it will still sound killer and will not be as loud in the cockpit.

Mike@Diablosport

iTrader: (2)

That would kinda suck if we didn't use our own software, no?

Either way, yes, fully tuned with CMR and flashed with a Predator.
We should have a 4 digit project coming together soon, to be tuned with CMR as well, I will post it up when it is ready.

Here's a link to the thread in the dyno section with all mods listed.
Made 786 backed up by a 783 pull, both at 12 psi...
https://ls1tech.com/forums/dynamometer-results-comparisons/994585-786-rwhp-stock-bottom-end.html