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02-03-2019, 10:15 AM | #1 |
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Bootmod3 S55 TQ limitation OTS tests - on STOCK and UPGRADE turbos - dynorun results
Back on our dynojet this time with 2 S55 powered cars !
Specs/mods: M3 F80 DCT EU Spec Mods:
M4 F82 DCT EU Spec Mods:
All runs were done in Engine on sport plus, Manual mode 5th gear and on Shell V-Power 100RON(93-94OCT) The boost by gear / torque limitation by gear feature has been on the bootmod3 config for a very long time, so we decided to dyno it. The (non ZCP and ZCP) torque is set to 550NM (405lbft) in the stock tune, the CS/GTS OEM maps have a torque limitation set to 650NM (480lbft). The OTS maps have a torque limitation of 750NM (553lbft). What does all this mean for the daily user or even those who track their cars? Well, putting down the massive torque the bootmod3 OTS maps bring is not always easy, especially in the first 3 gears. Here you can simply lower the torque output throughout the RPM range by a given percentage that suits you and your car best. Trackday! Having linear torque in curves is always a great thing (N/A like), good thing here is that you do not have to lower your power output when you get on the straight stretches e.g. 4th even 5th gear! Here you want to be as fast as possible, no need to limit power We tested 20% limitation as shown here: Here are the results from the M4: We dynod the following:
All plotted: Next up the M3:
All plotted: Stage 2 93OCT and Stage 2 93OCT with 20% limitation Stage 2 93OCT with stock torque limit and stock tune (from when the M3 was stock) Just for comparison sake, last post I made for all the OTS maps including the free ones, such as the CS map. The CS map has a torque limit of 600NM, which should equal the 20% limitation done on the Bootmod3 Stage 2 93OCT OTS. Results are very clear! Torque is the same between the CS and the 20% limited stage 2 93OCT OTS map until a certain RPM Last edited by Halim@HCP; 02-03-2019 at 11:10 AM.. Reason: Pictures of cars and config |
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02-03-2019, 03:56 PM | #4 |
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Wait so...to put it more simply, we can enjoy a "flat torque map" without any need for custom tuning, simply by using a ~20% boost reduction on our OTS maps?
To me at least, the "Stage2 20% limit" looks more streetable than the standard OTS map without the reduction. Stock like until 5000rpm than it keeps pulling another 1000rpm whereas the stock tune plateaus!
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02-03-2019, 05:57 PM | #5 | |
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No need for custom as you can customize it yourself. 20% limitation is just above stock, more like CS torque but topend is way higher! |
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02-03-2019, 08:07 PM | #7 |
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Boost by gear feature and ability to tweak reduction by gear is so sweet
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02-03-2019, 08:19 PM | #8 | ||
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02-04-2019, 04:45 AM | #10 |
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02-04-2019, 09:10 AM | #11 |
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Can you run the stg 2 93 oct with 20% boost reduction on a car with no other mods?
I was originally going to get a stage 1 but maybe stage 2 with boost reduction is more versatile. Also am I able to save in my maps multiple versions of an altered ots map? |
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02-04-2019, 10:50 AM | #12 | |
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Sure you can. |
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02-04-2019, 06:57 PM | #14 | ||
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BM3 Stage 1, E30 map
Dinan Axle back BMS Intake GoFastBit Had Dinantronic Stage 1 with Dinan Sport Tuner |
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02-05-2019, 12:08 PM | #15 |
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Drives: powered by bootmod3
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We just pushed out an update on the web to enable modifying details (name, description, version) on OTS maps as well using the "CHANGE DETAILS" button
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02-05-2019, 12:28 PM | #16 |
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Hi Halim,
Keep on doing the great work! I started a thread for boost by gear and what we've been seeing as the best traction options for at least 1/4 or launch. We have some numbers that say more boost reduction by the first 2 gears help the car launch and drive faster from a stand still. We assumed that it was a linear boost reduction (i.e: -3 or 4 psi across the map) What does more than 20% reduction do in these cases?? https://f80.bimmerpost.com/forums/sh....php?t=1526251 |
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02-05-2019, 12:30 PM | #17 | |
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02-05-2019, 12:37 PM | #18 |
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Holy Cow!!!!
it all makes sense now.... We were worried that excessive boost reduction across the gear would make it limp in lower boost, but it wasn't doing it and we were scared to add more. It's like the heavens have opened and excessive wheel spin on launch can become extinct if we want to!! |
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02-05-2019, 01:07 PM | #19 | |
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This will never limp the car, it's not fooling anything to make less boost, it's simply limitating the torque -> load -> boost |
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02-05-2019, 11:59 PM | #20 | |
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What am I missing? Asking with zero douchebaggery in mind. |
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02-06-2019, 07:25 AM | #21 | |
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02-06-2019, 08:22 AM | #22 | ||
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