Track day with slip.

BadOneThreeFive · 10-30-2011, 10:13 PM

Went to the track finally and I was really happy with the numbers. Mods are in my sig. NO meth! Around 50 degress F all day and elevation is 3600ft. Im Sure im in the high 11s at sea level.
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SpeedballTrix · 10-31-2011, 09:25 PM

Those are nice numbers for just tune and exhaust.
And for that altitude.

Well done

Stick or auto?

BadOneThreeFive · 10-31-2011, 09:48 PM

Thanks. Its an auto. First time using streets radial too and im now addicted :-)

Focusedintntions · 11-01-2011, 07:35 AM

I thought altitude didn't really affect FI cars since they make their own atmosphere in the intake track? I mean 15psi at 3600ft is the same as 15psi at sea level no?

jsublime · 11-01-2011, 01:03 PM

Great numbers, especially that 60! What psi were you running?

Xaeryan · 11-01-2011, 02:47 PM

Quote:

Originally Posted by Focusedintntions

I thought altitude didn't really affect FI cars since they make their own atmosphere in the intake track? I mean 15psi at 3600ft is the same as 15psi at sea level no?

Not entirely - since the ambient pressure is lower (say 11psi), to reach the same target manifold boost, the turbo must produce some additional boost, so it's being "overworked" (at least, compared to sea level). It's probably still within its prime efficiency range, and his intercooler will help with the additional heat generated by the turbo working harder to reach target boost, but yeah, slight power drops up in higher elevation.
Pressure ratio is one of the axes on compressor efficiency graphs, and altering the ambient pressure alters the pressure ratio (PR = outlet pressure / ambient pressure).

RnmEvo9 · 11-01-2011, 07:23 PM

Pretty impressive times, especially your 60ft! What map was this on?

BadOneThreeFive · 11-01-2011, 08:27 PM

Quote:

Originally Posted by jsublime

Great numbers, especially that 60! What psi were you running?

Rear Tires were at 32 PSI.

Quote:

Originally Posted by RnmEvo9

Pretty impressive times, especially your 60ft! What map was this on?

I was running map 6. I was hitting 17 PSI on this map with great AFRs.

Focusedintntions · 11-04-2011, 06:33 AM

Quote:

Originally Posted by Xaeryan

Not entirely - since the ambient pressure is lower (say 11psi), to reach the same target manifold boost, the turbo must produce some additional boost, so it's being "overworked" (at least, compared to sea level). It's probably still within its prime efficiency range, and his intercooler will help with the additional heat generated by the turbo working harder to reach target boost, but yeah, slight power drops up in higher elevation.
Pressure ratio is one of the axes on compressor efficiency graphs, and altering the ambient pressure alters the pressure ratio (PR = outlet pressure / ambient pressure).

TY for the info sir

RnmEvo9 · 11-05-2011, 01:52 AM

Quote:

Originally Posted by Robertbenson30

Rear Tires were at 32 PSI.

I was running map 6. I was hitting 17 PSI on this map with great AFRs.

Race gas?

BadOneThreeFive · 11-05-2011, 04:34 PM

Quote:

Originally Posted by RnmEvo9

Race gas?

Yes MS 109

RnmEvo9 · 11-06-2011, 01:28 PM

Next time if you can, try out map 7. Thats the map I run daily, but wasn't sure how different map 6 is to 7...

ChuckD05 · 11-06-2011, 02:30 PM

damn, my MT is tough, lol..

i just went and trapped 117 but only pulled a 12.3 becauae of a 2.01 60 foot...

i need to get some et streets I think

good runs

was that gas leaded or unleaded?

BadOneThreeFive · 11-06-2011, 04:14 PM

Quote:

Originally Posted by ChuckD05

damn, my MT is tough, lol..

i just went and trapped 117 but only pulled a 12.3 becauae of a 2.01 60 foot...

i need to get some et streets I think

good runs

was that gas leaded or unleaded?

Yea im never going to the track without my ET streets. They are amazing. MS 109 is unleaded fuel.

10-30-2011, 10:13 PM	#1
BadOneThreeFive Lieutenant 60 Rep 508 Posts Drives: 2008 BMW 135i Join Date: Mar 2010 Location: Guam iTrader: (1)	Track day with slip. Went to the track finally and I was really happy with the numbers. Mods are in my sig. NO meth! Around 50 degress F all day and elevation is 3600ft. Im Sure im in the high 11s at sea level. __________________ 08 135i N54 - Vargas Stage 1 Turbos with Billet wheels - BMS Intake, BMS Charge pipe, AR DPs, Stock mids, berk race muffler delete - JB4 G5 Map 3 75 Meth Additive with RACE DME flash - MS-109 and 100% meth injection (Single CM12 nozzle)
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10-31-2011, 09:25 PM	#2
SpeedballTrix Second Lieutenant 3 Rep 242 Posts Drives: 2009 135i 6MT SBM/CBL; 2022 X5 Join Date: Nov 2008 Location: Long Island, NY iTrader: (0)	Those are nice numbers for just tune and exhaust. And for that altitude. Well done Stick or auto?
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10-31-2011, 09:48 PM	#3
BadOneThreeFive Lieutenant 60 Rep 508 Posts Drives: 2008 BMW 135i Join Date: Mar 2010 Location: Guam iTrader: (1)	Thanks. Its an auto. First time using streets radial too and im now addicted :-) __________________ 08 135i N54 - Vargas Stage 1 Turbos with Billet wheels - BMS Intake, BMS Charge pipe, AR DPs, Stock mids, berk race muffler delete - JB4 G5 Map 3 75 Meth Additive with RACE DME flash - MS-109 and 100% meth injection (Single CM12 nozzle)
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11-01-2011, 07:35 AM	#4
Focusedintntions Colonel 105 Rep 2,696 Posts Drives: 2011 135i M-Sport :D Join Date: Nov 2010 Location: NoVA iTrader: (1)	I thought altitude didn't really affect FI cars since they make their own atmosphere in the intake track? I mean 15psi at 3600ft is the same as 15psi at sea level no? __________________ Faster, faster, faster, until the thrill of speed overcomes the fear of death… – Hunter Thompson
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11-01-2011, 01:03 PM	#5
jsublime Lieutenant 62 Rep 580 Posts Drives: G20 M340i Join Date: Jan 2009 Location: Orlando iTrader: (1) Garage List 2015 BMW X3 28i [0.00] 2011 BMW 135i [0.00] 2016 BMW M3 [0.00]	Great numbers, especially that 60! What psi were you running? __________________
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11-01-2011, 07:23 PM	#7
RnmEvo9 Banned 247 Rep 1,827 Posts Drives: 2007 335i Join Date: Apr 2011 Location: Pembroke Pines, FL iTrader: (2)	Pretty impressive times, especially your 60ft! What map was this on?
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11-06-2011, 01:28 PM	#12
RnmEvo9 Banned 247 Rep 1,827 Posts Drives: 2007 335i Join Date: Apr 2011 Location: Pembroke Pines, FL iTrader: (2)	Next time if you can, try out map 7. Thats the map I run daily, but wasn't sure how different map 6 is to 7...
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11-06-2011, 02:30 PM	#13
ChuckD05 NeedsMoarBoost 42 Rep 528 Posts Drives: 08 135i / 06 e90 325xi Join Date: Mar 2010 Location: NY iTrader: (0) Garage List 2009 BMW 335i Mtech [10.00] 2006 BMW 325xi e90 [10.00] 2008 BMW 135i M-Sport [7.80]	damn, my MT is tough, lol.. i just went and trapped 117 but only pulled a 12.3 becauae of a 2.01 60 foot... i need to get some et streets I think good runs was that gas leaded or unleaded?
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