997 Turbo / GT2 2004–present Turbo discussion on the current model Porsche 911 Twin Turbo.
Sponsored By SharkWerks, Inc

Welcome to 6SpeedOnline.com!
Welcome to 6SpeedOnline.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join 6SpeedOnline.com today!


Reply
 
Thread Tools Rate Thread Display Modes
Old 09-11-2009, 06:28 AM #1  
Registered User
 
Join Date: May 2009
Location: South Carolina
Posts: 36
Rep Power: 2
tclayj is on a distinguished road
Turbo Boost

How accurate is the dashboard OEM digital bar/number psi readout for turbo boost?
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on 6SpeedOnline!
Reply With Quote
Old 09-11-2009, 07:16 AM #2  
taylorcoleman's Avatar
Registered User
 
Join Date: Mar 2009
Location: Pittsburgh
Posts: 526
Rep Power: 31
taylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to behold
Not very accurate I'm told.

Regarding boost, I think I may have another hose that's coming loose. Previously I had an I/C loose hose and it made a rather noticable air rushing sound and of course the car was a bit slower on acceleration.

But at the moment, the car feels a little slower, and there is just a slight, different noise (like air, but hard to say). When I floor it, sometimes the boost guage stays pinned, and sometimes the boost guages fades after 4-5 seconds (either in overboost or regular). So, I'm not sure if I can rely on the boost guage to help me determine if I have a boost leak or not.

I'd just assume take it back to the dealer for them to check it out, but that's a 60 mile round trip (they pickup my car, so it's not my time, but miles on my car).

Anyhow, I know there were prior posts on boost loss, but I think the outcome was take to dealer and have them do a smoke test. Hoping there may be an easier way to diagnose at home.
__________________
\\\\\\\\\\\\\\\\\\\\\
Porsche 997 GT3 (2010)
-White, PCCBs, other fun things inside
Porsche 997 Twin Turbo (2009) Sold
Mercedes C63 AMG (2009)
- KLEEMANN K2 package ~550hp
Reply With Quote
Old 09-11-2009, 08:32 AM #3  
bbywu's Avatar
Registered User
2007 Porsche 911
 
Join Date: Jan 2007
Location: Wisconsin
Age: 35
Posts: 2,949
Rep Power: 301
bbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond reputebbywu has a reputation beyond repute
Quote:
Originally Posted by taylorcoleman View Post
Not very accurate I'm told.

Regarding boost, I think I may have another hose that's coming loose. Previously I had an I/C loose hose and it made a rather noticable air rushing sound and of course the car was a bit slower on acceleration.

But at the moment, the car feels a little slower, and there is just a slight, different noise (like air, but hard to say). When I floor it, sometimes the boost guage stays pinned, and sometimes the boost guages fades after 4-5 seconds (either in overboost or regular). So, I'm not sure if I can rely on the boost guage to help me determine if I have a boost leak or not.

I'd just assume take it back to the dealer for them to check it out, but that's a 60 mile round trip (they pickup my car, so it's not my time, but miles on my car).

Anyhow, I know there were prior posts on boost loss, but I think the outcome was take to dealer and have them do a smoke test. Hoping there may be an easier way to diagnose at home.
Taylor, if your clamp has come off again, I'd recommend using these:

http://www.aircraftspruce.com/catalo...es/oetiker.php
__________________
07 997 Ruf Tuned Turbo
05 955 Cayenne Turbo - waiting for delivery
04 996 GT3 - sold, looking for replacement
02 996 Turbo - gone, but not forgotten
Reply With Quote
Old 09-11-2009, 09:07 AM #4  
taylorcoleman's Avatar
Registered User
 
Join Date: Mar 2009
Location: Pittsburgh
Posts: 526
Rep Power: 31
taylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to beholdtaylorcoleman is a splendid one to behold
Quote:
Originally Posted by bbywu View Post
Taylor, if your clamp has come off again, I'd recommend using these:

http://www.aircraftspruce.com/catalo...es/oetiker.php
Thanks. I'll have the shop get those if a clamp is loose.

As to not thread jack, what I think is relevant to the OP's post is whether the boost guage can accurately identify if there is a leak (by means of the guage dropping).

I think perhaps the OP's question may have been more regarding the absolute reading of the guage (e.g. 17psi is 17psi). If the guage is not accurate, is there a standard deviation that's been quantified? Although I'm pretty sure the boost guage is not sufficient for tuning purposes, perhaps with a small SD it's sufficient for knowing close to where the psi's are running.

So I think the jury is still out on that.
__________________
\\\\\\\\\\\\\\\\\\\\\
Porsche 997 GT3 (2010)
-White, PCCBs, other fun things inside
Porsche 997 Twin Turbo (2009) Sold
Mercedes C63 AMG (2009)
- KLEEMANN K2 package ~550hp
Reply With Quote
Old 11-07-2009, 01:30 AM #5  
C4SxM5's Avatar
Registered User
 
Join Date: Jan 2004
Location: 916
Age: 29
Posts: 542
Rep Power: 49
C4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond repute
Send a message via AIM to C4SxM5
what is the highest psi on a turbo with sport chrono? with sport mode on and off? the reason why i ask is my car will display 15psi with sport mode off and 17 psi with it on, BUT the bar goes up to 18... Why have 18, but not be able to go up that high?
Reply With Quote
Old 11-07-2009, 10:09 AM #6  
Registered User
 
Join Date: Jun 2008
Location: Long Island, NY
Posts: 144
Rep Power: 0
nevert00fast can only hope to improve
Quote:
Originally Posted by C4SxM5 View Post
what is the highest psi on a turbo with sport chrono? with sport mode on and off? the reason why i ask is my car will display 15psi with sport mode off and 17 psi with it on, BUT the bar goes up to 18... Why have 18, but not be able to go up that high?
The speedo says 225.

Is your car stock? I only see 11-12psi with sports mode off 15 psi with it on. My car has a fabspeed exhaust.
Reply With Quote
Old 11-07-2009, 01:30 PM #7  
Registered User
 
Join Date: May 2009
Location: South Carolina
Posts: 36
Rep Power: 2
tclayj is on a distinguished road
What type of tune do you have?
Reply With Quote
Old 11-07-2009, 01:54 PM #8  
handdoc's Avatar
Registered User
 
Join Date: Aug 2009
Location: New England
Posts: 360
Rep Power: 15
handdoc is on a distinguished road
Taylor,

i see you found your gt3...congrats...give us some info in another thread!
__________________
handdoc
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
Old 11-08-2009, 01:02 AM #9  
C4SxM5's Avatar
Registered User
 
Join Date: Jan 2004
Location: 916
Age: 29
Posts: 542
Rep Power: 49
C4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond reputeC4SxM5 has a reputation beyond repute
Send a message via AIM to C4SxM5
i swore i saw it before my tune, but i currently am running evomsit stg II. the major difference after the tune is the boost comes on much quicker and stays on all the way through.

so, anyone ever see 18psi on the gauge OR is it just there for looks?
Reply With Quote
Old 11-08-2009, 03:40 PM #10  
tblountman's Avatar
Registered User
 
Join Date: May 2006
Location: nashville,tn
Age: 48
Posts: 307
Rep Power: 42
tblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond reputetblountman has a reputation beyond repute
I only saw a high of 15 before my tune and after the tune I am seeing 17 as tops in sport mode.
Reply With Quote
Old 11-08-2009, 10:53 PM #11  
bonehead's Avatar
Registered User
 
Join Date: Jul 2008
Location: An oven
Posts: 439
Rep Power: 19
bonehead will become famous soon enough
No tune (on a track, of course)
__________________
2007 997 TT Black/black, 3rd pedal
Reply With Quote
Old 11-09-2009, 06:51 AM #12  
Swoody's Avatar
Registered User
 
Join Date: Apr 2009
Location: Michigan
Posts: 106
Rep Power: 7
Swoody has a spectacular aura aboutSwoody has a spectacular aura aboutSwoody has a spectacular aura about
Totally stock, in sport mode my high is also 17psi, 15psi in normal.
__________________
________________
2007 997 TT, Carrara White, Terracotta/Black
Reply With Quote
Reply

Tags
997, bar, boost, leak, porsche, tester, turbo



Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On
Trackbacks are Off
Pingbacks are On
Refbacks are Off
Forum Jump

User CP

Visit our Sponsors

6SpeedOnline.com

All times are GMT -6. The time now is 02:21 AM.
Advertising - Jobs - Privacy Policy - Terms of Service
Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.2.0

Copyright Internet Brands