J1A1H

Ok everyone... Im having problems with my exhuast system being tooooo loud!

Im running a 2.5" downpipe right now right 2.5" exhaust all the way through, with no resonators only a back box. TOOOO LOUDDDDD!

Anyway, the downpipe needs to be replaced and i was wondering what i should do. I also have a Buddyclub Pro Spec which i would like to use.

I have just come across these exhaust cutouts and they seem like a genius idea!!!

My T3/04 turbo has a 2.5" flange so i cant run a 3" DP straight from the turbo. I spoke to someone that said
"he can use the 2.5" flange and then flare the piping to 3" "
Is this a gd idea? And then after the flexi 3" pipe, place the 3" E cutout there, and then after the e cutout have the buddyclub pro spec 2.5" all the way to the back box. (the pro spec will alwyas have the BUNG which comes with it in order to keep is as quiet as possible...

Is this setup reasonable and will it give me reasonable noise leves when the E Cutout is closed and gd gains when the e cutout is open?

Also how would this be tuned. I did some reading and people said you can:

Tune low boost (for me 4psi, daily driving) with the E cut out closed and then tune high boost (8psi) with the e cutout open. So when ever i run high boost i have to run the e cutout open so the tune is alright. Is there a way of connecting the e cutout to automatically open when i engage high boost?

I hope i have made myself clear....
Please get back to me....

Thanks in advance

Josh


Modified by J1A1H at 4:07 PM 5/24/2007

J1A1H

mysetup:
Stock B16b
APR headstuds
AEM cam gears

Log Mani
T3/04 garret turbo
Tial 38mm wastegate
Spearco intercooler
HKS BOV
2.5" downpipe
2.5" Decat
2.5" buddyclub pro spec decat back

Precision 525cc injectors
Aem fuel rail
Aem FPR
Walbro fuel pump

Blitz SBC id III Boost controller
ACT 6 puck Clutch
Hondata S300

93CX

Your setup sounds great.

I know there is a way to get a pressure sensor to open the cutout when it sees more than a certain amount of psi, but maybe not with the technology DMH provides in their kits.

Generally speaking flared 3" > straight 2.5" downpiping when it comes to any turbocharged application. What size is your turbo exactly?

J1A1H

its a normal t3/04 you would get in a drag kit... Not exactly sure...

Is a 2.5" flared to 3" then back into a 2.5" piping be alright for normal driving???

If i set high boost then i just switch the button so the cutout opens. so thats no big deal.

I was doing more reading, and people say that you should tune what ever psi with the cutout open. And if you drive around with it closed its ok as the engine runs a little richer... what do you all reccomend???

THANKS

Fo-Do Fanatic

why dont you just bottle neck a 3 in downpipe? just take a 2-2.5 in pipe bottleneck it and have a 3 in then bend and weld some 3 in pipe to it and be just fine

but a 2.5 would work good for your setup. you aren't boosting that much nor is your turbo that big. it should be jsut fine.