V2.0.2 Boost Log showing spikes

ThomasMartin · 12-08-2007, 11:13 AM

Hey

I have upped the Torque figures to 92% now but im still getting a boost spike exactly as i change is this normal? Boost is up to 11.5 PSI then levels out to around 9.5 but as soon as i change gears it spikes up to like 15.5?

Anyone else seeing this is it normal?

pikkashoe · 12-08-2007, 11:34 AM

Im pretty sure at gear shift its perfectly fine. Also when you open and close the throttle quickly. But let shiv chime in and confirm.

e.n335 · 12-08-2007, 11:36 AM

This is the normal boost spike every turbo car has when closing the throttle. The engine does not see this boost which is blown off from the diverter valves. This data does not show a relevant boost spike at all.

What has been the ambient temperature and what gas ( octane ) do you use ?

- Eugen

ThomasMartin · 12-08-2007, 11:52 AM

Quote:

Originally Posted by e.n335

This is the normal boost spike every turbo car has when closing the throttle. The engine does not see this boost which is blown off from the diverter valves. This data does not show a relevant boost spike at all.

What has been the ambient temperature and what gas ( octane ) do you use ?

- Eugen

Mixing 95 RON with 105 RON so probably around 94-95 US octane. The tempreture was a little cool for sunny South africa around 71 but the boost seems low for 92% values dont you think?

OpenFlash · 12-08-2007, 02:59 PM

Yep... no real boost spikes there. As others have said, the spike at the end is confined to the intercooler pipe and is caused by sudden throttle closure. Also, your boost pressure tapers off more than other logs we've seen posted due to your very high elevation (5500' above sea level). You can try to bump up user torque settings 2-3% and see what kind of boost pressure that gives you.

Shiv

ironic · 12-08-2007, 11:40 PM

i just installed my procede 1.47 yesterday and was playing with the data logging but i wasn't able to find a boost parameter? is this only on v2?

OpenFlash · 12-09-2007, 12:33 AM

Quote:

Originally Posted by ironic

i just installed my procede 1.47 yesterday and was playing with the data logging but i wasn't able to find a boost parameter? is this only on v2?

Yes. But you can log "Engine Load" as its proportional with boost. Just measured in different units (% vs PSI).

Shiv

ironic · 12-09-2007, 02:35 PM

Quote:

Originally Posted by shiv@vishnu

Yes. But you can log "Engine Load" as its proportional with boost. Just measured in different units (% vs PSI).

Shiv

thanks shiv!

12-08-2007, 11:13 AM	#1
ThomasMartin First Lieutenant 29 Rep 321 Posts Drives: BMW 335i Coupe Join Date: Jun 2007 Location: South Africa iTrader: (0)	V2.0.2 Boost Log showing spikes Hey I have upped the Torque figures to 92% now but im still getting a boost spike exactly as i change is this normal? Boost is up to 11.5 PSI then levels out to around 9.5 but as soon as i change gears it spikes up to like 15.5? Anyone else seeing this is it normal? Attached Images
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12-08-2007, 11:34 AM	#2
pikkashoe Major 59 Rep 1,239 Posts Drives: 2007 BMW 335 Coupe Join Date: Feb 2007 Location: Miami, FL iTrader: (1)	Im pretty sure at gear shift its perfectly fine. Also when you open and close the throttle quickly. But let shiv chime in and confirm. __________________ 2007 E92 AW/Coral Red/Alumin, 6 speed manual, ZSP, PROCEDE V3.1, Factory Short-Throw Knob, Bms Filter. 12/7/07 - 12.84 @ 109.36
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12-08-2007, 11:36 AM	#3
e.n335 Moderator 279 Rep 4,481 Posts Drives: e93 ///M3 DCT, 07/2009 Join Date: Feb 2007 Location: Switzerland, ZH iTrader: (0)	This is the normal boost spike every turbo car has when closing the throttle. The engine does not see this boost which is blown off from the diverter valves. This data does not show a relevant boost spike at all. What has been the ambient temperature and what gas ( octane ) do you use ? - Eugen
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12-08-2007, 02:59 PM	#5
OpenFlash 1806 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	Yep... no real boost spikes there. As others have said, the spike at the end is confined to the intercooler pipe and is caused by sudden throttle closure. Also, your boost pressure tapers off more than other logs we've seen posted due to your very high elevation (5500' above sea level). You can try to bump up user torque settings 2-3% and see what kind of boost pressure that gives you. Shiv
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12-08-2007, 11:40 PM	#6
ironic Major General 267 Rep 8,338 Posts Drives: Jet Black 335i Join Date: Dec 2006 Location: San Francisco, Ca iTrader: (22)	i just installed my procede 1.47 yesterday and was playing with the data logging but i wasn't able to find a boost parameter? is this only on v2? __________________ Widebody 335i Project Car BUILD \| PHOTOSHOOT
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