Tip. Peak-boost, sport chrono.
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Tip. Peak-boost, sport chrono.
How do you test your tip peak boost, I know is suppose to be 1.2 bar but is it done in 4 or 5 gear, also for how long is it suppose to stay on 1.2 if it ever gets there.
Reason I'm asking is because I did it from 4th gear and it went up to 1.1 for a split second and stayed on 0.8 until I let off probably another 5 seconds, BTW my car is equipped with sport chrono, and Fabspeed exhaust with 200 cel cats
Thanks
Reason I'm asking is because I did it from 4th gear and it went up to 1.1 for a split second and stayed on 0.8 until I let off probably another 5 seconds, BTW my car is equipped with sport chrono, and Fabspeed exhaust with 200 cel cats
Thanks
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From: Florida
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How do you test your tip peak boost, I know is suppose to be 1.2 bar but is it done in 4 or 5 gear, also for how long is it suppose to stay on 1.2 if it ever gets there.
Reason I'm asking is because I did it from 4th gear and it went up to 1.1 for a split second and stayed on 0.8 until I let off probably another 5 seconds, BTW my car is equipped with sport chrono, and Fabspeed exhaust with 200 cel cats
Thanks
Reason I'm asking is because I did it from 4th gear and it went up to 1.1 for a split second and stayed on 0.8 until I let off probably another 5 seconds, BTW my car is equipped with sport chrono, and Fabspeed exhaust with 200 cel cats
Thanks
If you look at a dyno graph you'll see the peak torque is mid range, I suspect that's where the peak boost is also. If you were cranking out 6k+ rpms you were way past peak boost. Try looking at it around 3500-4500 rpms.
--CC
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From: greece
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Same here....
I have exactly the same readings with you. I have seen 2-3 times 1.1 bar for half a second or so, but never seen 1.2 bar (in SC mode). At higher rpm >4.5k I see around 0.9-0.8 bar (SC) and 0.8-0.7 at normal mode.
I've checked (and rechecked...) the car for leaks (not by vacum tester, just visual inspection of connections at intercoolers, intake etc) but everything seems OK.
I have come to the point where I think it is far easier to demonstrate 1.2 bar with manual transmission (mine is TIP) by hard accelerating from low speed with high gear, and even so I think the ecu will not always give 1.2 bar.
In conclusion I think your car I ok. At least that is what I think of my car because It really feels quick and I guess if there was a leak it I could hear it and the boost would be significantly reduced (i.e. 0.5 - 0.6).
Just my thoughts
MAT911
I have exactly the same readings with you. I have seen 2-3 times 1.1 bar for half a second or so, but never seen 1.2 bar (in SC mode). At higher rpm >4.5k I see around 0.9-0.8 bar (SC) and 0.8-0.7 at normal mode.
I've checked (and rechecked...) the car for leaks (not by vacum tester, just visual inspection of connections at intercoolers, intake etc) but everything seems OK.
I have come to the point where I think it is far easier to demonstrate 1.2 bar with manual transmission (mine is TIP) by hard accelerating from low speed with high gear, and even so I think the ecu will not always give 1.2 bar.
In conclusion I think your car I ok. At least that is what I think of my car because It really feels quick and I guess if there was a leak it I could hear it and the boost would be significantly reduced (i.e. 0.5 - 0.6).
Just my thoughts
MAT911
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FUnny! Was about to start exactly this thread, but read the newest posts before doing so...
I have a 2007 997TT tiptronic. I have nevers seen readings over 1.0 bar. Withous sc it is max 0.8. The problem is that the speedlimit is here 120km/h so I dont think I get to speeds where 1.2 is available, the other reason is I let the tip do the shifting, so it probably automatically changes gear. Probably 1.2 would arrive with a high gear and mashing it.
I started to wonder about this after seeing this video of the 997.2 tt where he is at 1.0 more often than I am and started wondering whether my readings are normal. The car seems to have a lot of power so I think these values are normal:
look at 6:15, the speed is 150-200km/h however...
http://www.youtube.com/watch?v=cNYZqeXq4Nw
FOr you to enjoy part 2:
http://www.youtube.com/watch?v=cMlpC...eature=related
I have a 2007 997TT tiptronic. I have nevers seen readings over 1.0 bar. Withous sc it is max 0.8. The problem is that the speedlimit is here 120km/h so I dont think I get to speeds where 1.2 is available, the other reason is I let the tip do the shifting, so it probably automatically changes gear. Probably 1.2 would arrive with a high gear and mashing it.
I started to wonder about this after seeing this video of the 997.2 tt where he is at 1.0 more often than I am and started wondering whether my readings are normal. The car seems to have a lot of power so I think these values are normal:
look at 6:15, the speed is 150-200km/h however...
http://www.youtube.com/watch?v=cNYZqeXq4Nw
FOr you to enjoy part 2:
http://www.youtube.com/watch?v=cMlpC...eature=related
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From: greece
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That is a 997.2 (non-mezger engine) Turbo, so not sure if the boost settings is the same with the 997.1.
Having said that I can confirm that I am getting 0.1 (even o,2) less boost at the same speed and at around the same rpm ie >5500K than he is getting.
ECU adjusts boost taking into account multiple factors, but I have read in some post that if the outside air temperature increases the ECU adjust the boost upwards in order to get the same mass of air. This assumption makes sense as long as the air temp doesnt get beyond certain threshold where the EGT gets really hot and then the ECU reduces boost to safeguard the engine.
Dont know how accurate is the above, may be someone with better knowledge on turbos and ECUs can assist...
Back to our 2007 Turbo Tip, since we both get the same boost (more or less) we can assume that our cars are running normal.
MAT911
Having said that I can confirm that I am getting 0.1 (even o,2) less boost at the same speed and at around the same rpm ie >5500K than he is getting.
ECU adjusts boost taking into account multiple factors, but I have read in some post that if the outside air temperature increases the ECU adjust the boost upwards in order to get the same mass of air. This assumption makes sense as long as the air temp doesnt get beyond certain threshold where the EGT gets really hot and then the ECU reduces boost to safeguard the engine.
Dont know how accurate is the above, may be someone with better knowledge on turbos and ECUs can assist...
Back to our 2007 Turbo Tip, since we both get the same boost (more or less) we can assume that our cars are running normal.
MAT911
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Joined: Nov 2009
Posts: 1,330
From: Northern Europe
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That is a 997.2 (non-mezger engine) Turbo, so not sure if the boost settings is the same with the 997.1.
Having said that I can confirm that I am getting 0.1 (even o,2) less boost at the same speed and at around the same rpm ie >5500K than he is getting.
ECU adjusts boost taking into account multiple factors, but I have read in some post that if the outside air temperature increases the ECU adjust the boost upwards in order to get the same mass of air. This assumption makes sense as long as the air temp doesnt get beyond certain threshold where the EGT gets really hot and then the ECU reduces boost to safeguard the engine.
Dont know how accurate is the above, may be someone with better knowledge on turbos and ECUs can assist...
Back to our 2007 Turbo Tip, since we both get the same boost (more or less) we can assume that our cars are running normal.
MAT911
Having said that I can confirm that I am getting 0.1 (even o,2) less boost at the same speed and at around the same rpm ie >5500K than he is getting.
ECU adjusts boost taking into account multiple factors, but I have read in some post that if the outside air temperature increases the ECU adjust the boost upwards in order to get the same mass of air. This assumption makes sense as long as the air temp doesnt get beyond certain threshold where the EGT gets really hot and then the ECU reduces boost to safeguard the engine.
Dont know how accurate is the above, may be someone with better knowledge on turbos and ECUs can assist...
Back to our 2007 Turbo Tip, since we both get the same boost (more or less) we can assume that our cars are running normal.
MAT911
0.8/1.0 vs 1.0/1.2 respectively.
Yes, an expert opinnion would be appreciated...
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How do you test your tip peak boost, I know is suppose to be 1.2 bar but is it done in 4 or 5 gear, also for how long is it suppose to stay on 1.2 if it ever gets there.
Reason I'm asking is because I did it from 4th gear and it went up to 1.1 for a split second and stayed on 0.8 until I let off probably another 5 seconds, BTW my car is equipped with sport chrono, and Fabspeed exhaust with 200 cel cats
Thanks
Reason I'm asking is because I did it from 4th gear and it went up to 1.1 for a split second and stayed on 0.8 until I let off probably another 5 seconds, BTW my car is equipped with sport chrono, and Fabspeed exhaust with 200 cel cats
Thanks
without SC, max reading is 1.0 bar.
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This has been discussed before but anyway the easiest way to tell if you are making your 1.2 max in sport C is to select 4th when you are doing about 80 kph and stand on the throttle....don't squeeze it on just nail it instantly to the floor. Look at your boost gauge and look for a small right angled arrow to appear just to the right of the boost reading on the digital setting and it will go to 1.2 and stay there so long as you keep the pedal pinned to the floor. It will drop as the ecu determines the throttle position with the engine load so don't expect it to stay at 1.2 forever. Thats the whole idea of VTG...it adjusts the boost depending on load etc. If your car isn't flash tuned then don't expect miracles that the boost be maintained infinitum. The 1.2 rarely happens in stock tune unless the engine is under a decent load at a lower than average rpm.
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This has been discussed before but anyway the easiest way to tell if you are making your 1.2 max in sport C is to select 4th when you are doing about 80 kph and stand on the throttle....don't squeeze it on just nail it instantly to the floor. Look at your boost gauge and look for a small right angled arrow to appear just to the right of the boost reading on the digital setting and it will go to 1.2 and stay there so long as you keep the pedal pinned to the floor. It will drop as the ecu determines the throttle position with the engine load so don't expect it to stay at 1.2 forever. Thats the whole idea of VTG...it adjusts the boost depending on load etc. If your car isn't flash tuned then don't expect miracles that the boost be maintained infinitum. The 1.2 rarely happens in stock tune unless the engine is under a decent load at a lower than average rpm.<img src="images/smilies/smile.gif" border="0" alt="" title="Smilie" smilieid="1" class="inlineimg" />
<br />
With this test and the arrow, I get 0.7-0.9. At lower speeds with the arrow on I get 1.0 briefly, but ususally 0.7-0.9.
Seems too low...
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I've seen the same... I seem to be getting 0.7-0.8 in SC mode on my 07 tip... sometimes it flicks up to 0.9 briefly... I don't believe I've ever seen 1.0.... I haven't tried the 4th gear up a hill test yet though... my dealer says this is the expected boost... I was under the impression based on reading the forum that i should expect 1.0/1.2 in nonSC/SC modes....
drvik
drvik
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Hi
A brief update. It is clear that it is very difficult to get as high values as the manual car gets, as tip doesnt let you stress the engine and upshift even manually over a certain point. My car was at the dealers and all credit to them they checked everything for 2 weeks. The pressurised the system, changed o rings, lubricated the wastegate axels, updated software, but didnt really find anything. However now I see 0.9-1.0 quite easily and it doesnt drop to o.7 anymore so they fixed something. 1.2 i havent still seen yet, but otherwise am getting quite constant high readings now. There is a limit to what I can test. Hope this helps someone.
A brief update. It is clear that it is very difficult to get as high values as the manual car gets, as tip doesnt let you stress the engine and upshift even manually over a certain point. My car was at the dealers and all credit to them they checked everything for 2 weeks. The pressurised the system, changed o rings, lubricated the wastegate axels, updated software, but didnt really find anything. However now I see 0.9-1.0 quite easily and it doesnt drop to o.7 anymore so they fixed something. 1.2 i havent still seen yet, but otherwise am getting quite constant high readings now. There is a limit to what I can test. Hope this helps someone.
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