Boost Pressure
10-11-2003, 04:11 PM
#1
Track Day
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Location: Singapore
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Boost Pressure
Driving my 996TT, I get my boost reading between 0.6 to 0.7
Initially when I hit the gas at low revs(3000rpm), it climbs to 0.7bar then in the midrange(4500-5500) it drops to 0.6bar and then back to 0.7bar.
rpm readings are estimates.
Is this normal?
Would remapping the ECU and/or changing the exhaust/sport-cat make a difference in the boost?
I noticed an X50 TT having a maximum of 1.0bar boost, stock TT.
Initially when I hit the gas at low revs(3000rpm), it climbs to 0.7bar then in the midrange(4500-5500) it drops to 0.6bar and then back to 0.7bar.
rpm readings are estimates.
Is this normal?
Would remapping the ECU and/or changing the exhaust/sport-cat make a difference in the boost?
I noticed an X50 TT having a maximum of 1.0bar boost, stock TT.
10-11-2003, 04:43 PM
#2
Three Wheelin'
Join Date: Mar 2003
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Ok - boost spikes are totally normal...
As for remaps, most ECU upgrades will run more boost through your turbos. I used to get 0.9 in stock X50 mode but now I get 1.2 bar (I think I saw a spike of 1.3 once too!!) all the time in IA600 mode...
A freeflow exhaust with less backpressure could increase your boost by 0.1 bar but its not that significant. An exhaust however (with race/less restrictive cats) will reduce your turbo spool time and os you will get max boost at a lower RPM...
Hope this rambling helps a bit
As for remaps, most ECU upgrades will run more boost through your turbos. I used to get 0.9 in stock X50 mode but now I get 1.2 bar (I think I saw a spike of 1.3 once too!!) all the time in IA600 mode...
A freeflow exhaust with less backpressure could increase your boost by 0.1 bar but its not that significant. An exhaust however (with race/less restrictive cats) will reduce your turbo spool time and os you will get max boost at a lower RPM...
Hope this rambling helps a bit
10-11-2003, 10:35 PM
#3
Track Day
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Thanks... I'll look into remapping my ECU.
I live in Singapore and the Techart Dealer here wants approx US$8,400 to send the ECU back for tuning to 470hp. I got a quote from Cargraphic and they want US4,700 for the reprogramming, however, I got to do the postage and installation myself.
Any ideas/comments? Don't hear/see of many discussions on Techart and Cargraphic Remaps.
Also our fuel here is 98octane RON and when we drive across the border to Malaysia we get RON97.
I live in Singapore and the Techart Dealer here wants approx US$8,400 to send the ECU back for tuning to 470hp. I got a quote from Cargraphic and they want US4,700 for the reprogramming, however, I got to do the postage and installation myself.
Any ideas/comments? Don't hear/see of many discussions on Techart and Cargraphic Remaps.
Also our fuel here is 98octane RON and when we drive across the border to Malaysia we get RON97.
10-11-2003, 11:06 PM
#5
RL Technical Advisor
Maomao:
If I can be of assistance regarding a GIAC software upgrade for your car, please let me know.
I have a fair number of clients in Singapore,...
If I can be of assistance regarding a GIAC software upgrade for your car, please let me know.
I have a fair number of clients in Singapore,...
10-12-2003, 12:46 PM
#7
Rennlist Lifetime Member
Thats ok, you can take the unit to just shy of 500HP with a set of 100cell cats and a better muffler, air cleaner and ECU. We also suggest replacing the compressor bypass valves with a billet version as the originals are known for tearing. The tip is a great car, ask Alex. He has pushed hid to 11.6 in the 1/4 