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n55pioneer n55pioneer is offline
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Default 0 FUA and high 30 degree temps log - 12-04-2018, 01:31 PM

I have found that running as low an FUA as possible without getting TC's is optimal (no restrictions in my setup, MPPSK, JB4 only).

How does this log look, it felt like pretty strong.
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n55pioneer n55pioneer is offline
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Default 12-05-2018, 09:33 AM

Here is a pic, thanks for looking.
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Payam @ BMS Payam @ BMS is offline
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Default 12-05-2018, 09:54 AM

I must agree it does look strong and healthy! What fuel is this on?


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f9kandy f9kandy is offline
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Default 12-05-2018, 10:15 AM

How does the throttle look on shifts? That's one reason I had to up the FUA. May be ok in the heat but at 0 deg C ambient the turbo is too frisky with no restriction on exhaust.
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n55pioneer n55pioneer is offline
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Default 12-07-2018, 11:59 AM

Quote:
Originally Posted by Payam @ BMS
I must agree it does look strong and healthy! What fuel is this on?
This is 93 octane. Things seem a bit inconsistent though, sometimes at the same ambient temperature I will get TC's so I raise FUA and don't hit target. Other times the logs look like this and the car rips hard. I think the BEF will be SO nice, can't wait until 2019...

Ambient temps are around 0 Celsius to the other post. We use F here in Freedom land...
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f9kandy f9kandy is offline
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Default 12-07-2018, 02:36 PM

Increasing FUA effectively reduces boost feedback to the ECU and also the base fueling, so ideally tune it on map6 for boost but the trade off is the limited fuel supply. I agree the BEF can't come soon enough.
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Default 12-08-2018, 02:56 PM

Here is one with ambient temp in the low 20 degrees (Freedom units, this is -5 degrees C). I was getting TC's at 0 FUA at this temp, so I upped FUA to 3 and got some logs. I think this is the best looking one, but there is some inconsistency with others. I am guessing the BEF will really help with this.

Is it an engine safety issue to get TC's like when running 0 FUA? Maybe it is not smart to run 0 FUA, waiting for TC's to happen until I raise it? Or is it just a driveability concern?

Also this is 93 octane PLUS 3-4 gallons of ethanol now. The log from the OP was 93 oct, no ethanol mix.
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f9kandy f9kandy is offline
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Default 12-09-2018, 02:18 AM

Throttle closure is just a secondary method of boost, or rather torque, control. It is however not a very smooth way to do it so if you can control the overboost better at low rpm using the wastegate bias available in map 6 for example, you can get a decent result all round.
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Default 12-10-2018, 05:56 PM

Quote:
Originally Posted by f9kandy
Throttle closure is just a secondary method of boost, or rather torque, control. It is however not a very smooth way to do it so if you can control the overboost better at low rpm using the wastegate bias available in map 6 for example, you can get a decent result all round.
Like Duty Bias? What settings?
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f9kandy f9kandy is offline
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Default 12-11-2018, 04:03 PM

Yes set the duty bias to achieve stable boost. Each car is slightly different so it is something to experiment with.
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