"Boost vs Speed/Gear" usage question

General support questions and announcements for MS3. See also MS3 manuals.

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arran
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"Boost vs Speed/Gear" usage question

Post by arran »

Hi all,

I've been looking at the "Boost vs Speed/Gear" settings as I want to reduce the amount of boost in first gear.
My question is about the units of the "per gear targets".
Is the unit kPa as shown?
My head is telling me I'm looking for a percentage (of the target table).

I've checked out the new manuals and I'm looking for more info on how the per gear target kPa interacts with the values in the "Boost targets" table (rpm versus throttle)?
If the per gear target was a percentage it would be based from the table, but if it is a kPa does it override the table with just a flat setting for all throttle and rpms in that gear?

Am I making sense!?

Thanks in advance,
Arran
RX7 Series 2 13B Turbo. Megasquirt 3 with 3X Expander and V3 CPU. Firmware 1.4.1
Knock module, twin EGT, real time clock, WBO2, full sequential fuel and spark
http://web.aanet.com.au/arran
nathaninwa
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Re: "Boost vs Speed/Gear" usage question

Post by nathaninwa »

If using boost by gear the actual target table is ignored and the per gear units are used. Depending on the firmware the initial value or bias table needs tuned still

As a test so you can see the relation input some values that your tuned closely too. Let's say it's 200kpa. Make first gear 190, second gear 195, third 200 and fourth 205. To make a pull (doesn't need to be to redline either just plenty high in the revs to get boost goin) and datalog this. Check out the lot under boost1 targets and you should see the desired effect
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arran
Master MS/Extra'er
Posts: 617
Joined: Mon Oct 29, 2012 2:34 am
Location: Brisbane Australia
Contact:

Re: "Boost vs Speed/Gear" usage question

Post by arran »

Thanks.
RX7 Series 2 13B Turbo. Megasquirt 3 with 3X Expander and V3 CPU. Firmware 1.4.1
Knock module, twin EGT, real time clock, WBO2, full sequential fuel and spark
http://web.aanet.com.au/arran
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