996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Back pressure question

Thread Tools
 
Search this Thread
 
Rate Thread
 
  #1  
Old 09-01-2005, 10:24 AM
SPANKY's Avatar
Senior Member
Thread Starter
Join Date: Jun 2005
Location: Hells Half Acre
Age: 48
Posts: 313
Rep Power: 32
SPANKY is infamous around these parts
Back pressure question

If you have an exhaust with no mufflers like I do, is it making enough backpressure or am I losing power?

Not sure because I had a debate with a guy last night and he said with the Muffler by pass system I have the car wont make enough back pressure

Is this guy a wing nut?

PHD? anyone?
 
  #2  
Old 09-01-2005, 12:41 PM
BBGT2's Avatar
Registered User
Join Date: Jul 2005
Location: Chicagoland
Age: 58
Posts: 4,338
Rep Power: 240
BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !BBGT2 Is a GOD !
Turbocharged engines do not need backpressure, N/A engines do need backpressure.

BBGT2
 
  #3  
Old 09-01-2005, 04:33 PM
KJM3's Avatar
Registered User
Join Date: Apr 2004
Location: Toronto
Posts: 445
Rep Power: 38
KJM3 is infamous around these parts
Actually, no cars need back pressure. The reason some N/A cars lose power due to less backpressure is because they are not TUNED to benefit from the reduced backpressure. When you reduce backpressure significantly, cam timing and ignition timing has to be adjusted to benefit from the decreased backpressure.

With less backpressure, your Turbo's will spool faster and you should be able to sustain a higher level of boost.

- KJ
 
  #4  
Old 09-02-2005, 10:02 AM
SPANKY's Avatar
Senior Member
Thread Starter
Join Date: Jun 2005
Location: Hells Half Acre
Age: 48
Posts: 313
Rep Power: 32
SPANKY is infamous around these parts
Thanks guys..My Tuner did not make any adjustments as far as I know to anything other than software. Is that enough?
 
  #5  
Old 09-02-2005, 11:55 AM
KJM3's Avatar
Registered User
Join Date: Apr 2004
Location: Toronto
Posts: 445
Rep Power: 38
KJM3 is infamous around these parts
Originally posted by SPANKY
Thanks guys..My Tuner did not make any adjustments as far as I know to anything other than software. Is that enough?
I think you should be fine. You may not be making optimal power when you bypass the Muffler's, but you'll still be making more than with the mufflers NOT bypassed.

BTW, nice to see another Toronto TT on the board!

- KJ
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
eclip5e
Automobiles For Sale
8
04-28-2022 12:38 AM
Armytrix_F1_Exhaust
Mercedes / AMG
12
07-07-2019 11:31 PM
The Oss
Automobiles For Sale
2
08-24-2015 08:19 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Back pressure question



All times are GMT -6. The time now is 07:06 AM.