Is it bad if I run my greddy turbo with stock exhaust? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 04-29-2008, 07:36 PM   #1
Newb
Thread Starter
 
Join Date: Jun 2007
Location: California
Posts: 36
Total Cats: 0
Default Is it bad if I run my greddy turbo with stock exhaust?

I have a greddy turbo, with an upgraded 2.5 inch down pipe, and I want to buy a wideband over an exhaust rite now. I was wondering will running the stock exhaust hurt the turbo from the back presser that will be built up?

I plan to buy an exhaust, but just not yet, most likely in july some time. I will also be running the stock 5 - 5.5 lbs of boost. Will running the stock exhaust hurt anything reliability wise? thanks.

Last edited by Wakaranai; 04-29-2008 at 11:26 PM.
Wakaranai is offline   Reply With Quote
Old 04-29-2008, 07:55 PM   #2
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,915
Default

A very wise choice.

Running the stock exhaust will do no harm to the turbo or any other piece of the system. The added restriction will cause a slight decrease in efficiency relative to a more open system, but nothing's going to break, if that's what you're worried about.
Joe Perez is offline   Reply With Quote
Old 04-29-2008, 08:33 PM   #3
Elite Member
iTrader: (13)
 
Join Date: Nov 2006
Location: Tigard, Oregon
Posts: 3,908
Total Cats: 0
Default

Yur not hurtin anything except your spool up and the power you will make. Run what ya brung until ya decide to spend more money!
cueball1 is offline   Reply With Quote
Old 04-29-2008, 09:05 PM   #4
Elite Member
iTrader: (24)
 
kotomile's Avatar
 
Join Date: Oct 2006
Location: Monterey, CA
Posts: 7,578
Total Cats: 40
Default

You'll be fine, I ran stock exhaust and tiny Greddy dp for a while and was ok, but I did delete the stock muffler and add a turndown in its place until I got my exhaust.
kotomile is offline   Reply With Quote
Old 04-29-2008, 10:56 PM   #5
Senior Member
iTrader: (4)
 
Join Date: Aug 2007
Location: Guam (U.S Terr.)
Posts: 786
Total Cats: -2
Default

Stock Exhaust= Slow.

For example.

1/4 time for me with my stock exhaust at 5psi=16.??
1/4 time with open at 5 psi= 15.4

I just keep mine on when im driving around, and try...Try not to race anyone because ill embarrass myself. But then when i go to the drag strip i take it off.
mike_671 is offline   Reply With Quote
Old 04-29-2008, 11:23 PM   #6
Senior Member
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Quote:
Originally Posted by kotomile View Post
You'll be fine, I ran stock exhaust and tiny Greddy dp for a while and was ok, but I did delete the stock muffler and add a turndown in its place until I got my exhaust.
Right now, i am running with a test pipe and otherwise stock exhaust. What kind of restriction is there between the cat and the muffler? Say, if i took the muffler off like you did, how close would that be to say, a 3" exhaust with a decent muffler. Basically what i am saying is that i am broke and would enjoy more power and better spool and i am thinking of removing the stock muffler.
wes65 is offline   Reply With Quote
Old 04-29-2008, 11:45 PM   #7
Senior Member
iTrader: (4)
 
Join Date: Aug 2007
Location: Guam (U.S Terr.)
Posts: 786
Total Cats: -2
Default

^ If you can enjoy the loudness of that ****, then take it off. If you take out the stock one theres a pretty big difference in spool. I'm sure a three inch from the down pipe is a hole lot better then just taking off the stock exhaust IMO.
mike_671 is offline   Reply With Quote
Old 04-29-2008, 11:56 PM   #8
Elite Member
iTrader: (24)
 
kotomile's Avatar
 
Join Date: Oct 2006
Location: Monterey, CA
Posts: 7,578
Total Cats: 40
Default

Mufflerless stock piping is not really comparable to a good free-flowing exhaust, but since your turbo is already on, go ahead and ditch the muffler, just make sure to route the exhaust down so it doesn't melt your bumper. My mufflerless stock piping was much quieter than my Enthuza, FWIW.
kotomile is offline   Reply With Quote
Old 04-30-2008, 03:48 PM   #9
Guest
 
Join Date: Apr 2008
Posts: 1
Total Cats: 0
Default

like everyone has said, it wont hurt the car, but it definitely isnt helping you make power with a stock exhaust
bamf3000 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85) Lincoln Logs Dynos and timesheets 4 09-23-2015 01:26 PM
VE analyze and Autotune seems funny (noob) TorqueZombie MEGAsquirt 64 09-18-2015 06:03 PM
Bp5a swap NA8 Will_da_beast Engine Performance 1 09-14-2015 08:06 PM
WTB T25/T28 flanged turbo ASAP JesseTheNoob WTB 4 09-11-2015 02:25 PM
New here, saying hi, here's what I'm workin with. SuperSneakySecretSquirrel Meet and Greet 5 09-06-2015 09:30 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:27 AM.