XHP Flashtool - F8X DCT Transmission Tuning Software Tested!

[davyent]

[QUOTE=TopJimmy;29954286]I took advice from Commanderwiggin and switched from Stage3 to Stage2 V1.0 with TP4/TR400 and it’s sooooo much better. Now D3 is usable whereas on Stg3 it was ridiculously revvy. D2 is nicely sporty and D3 extra sporty. Give it a try.

BTW I’m on the BM3 OTS GTS tune for daily driving. The TP4/TR400 feels good without too much kick.

I have always said the Stage 2 is more balanced. Stage 3 is over the top for me as well. I rarely use it.

[davyent]

Originally Posted by M4Viper

Mine is making 900wtq (1220nm) which translates to 1030ft lb (1400nm) at the crank.
Reduce 70% will be 1000nm.
So I should set Tr 400 Tp 3?
Trying faster acceleration and shifts.
I’m trying to improve my 60-130 times.

Drop your TP to 1.

[davyent]

Originally Posted by M4Viper

Commanderwiggin
Anyone adjusted the axle ratio running wider/taller tires?

I did yesterday. Based off calculations from www.tiresize.com I changed my GR to 3.21 and first thing I sensed was the common clunky noise from the diff ceased. Everything else was fine. Yet to sense any interference with my DSC.

[Motown65]

Originally Posted by Commanderwiggin

I'll be honest I'm trusting the team at XHP less and less as they've added revisions. I also don't appreciate the new "custom map" offering since it takes away completely from the base maps which in my experience have only gotten worse as they've progressed in the revs. To be clear, I'm not shitting on them completely, I do like a lot of what they've brought to the platform but they should focus on perfecting the OTS rather than copping out a reply "we can fix that with custom maps".

Now to comment on axle ratio, I 100% don't agree with Semin in his comment and this should not be adjusted as it will mess with the DSC.

How exactly would it mess with the dsc? No one know exactly what the tcu uses this variable for. The only two to change it I believe are using the wrong number. I believe the effective ratio should be used to correct shifting but I’m still not sure if we should change it aswell

[Motown65]

Originally Posted by davyent

I did yesterday. Based off calculations from www.tiresize.com I changed my GR to 3.21 and first thing I sensed was the common clunky noise from the diff ceased. Everything else was fine. Yet to sense any interference with my DSC.

What tire size are you?

[slaughter.mode]

Originally Posted by TopJimmy

I took advice from Commanderwiggin and switched from Stage3 to Stage2 V1.0 with TP4/TR400 and it’s sooooo much better. Now D3 is usable whereas on Stg3 it was ridiculously revvy. D2 is nicely sporty and D3 extra sporty. Give it a try.

BTW I’m on the BM3 OTS GTS tune for daily driving. The TP4/TR400 feels good without too much kick.

I just read this and decided to flash to Stage 2 v1.0 today with similar TP/TR settings and it has fixed some drivability issues I thought were physical DCT problems. Specifically problems with hesitation with D mode (any) going up from 1st > 2nd and down from 3rd > 2nd. It was at the point of 100% predictability for me to replicate the issues but now-nothing, it's smooth again. Wild. I suppose the 3 version options are there to support 3 different behaviors to accommodate your driving style/mods. Who knows but I am very happy I stumbled upon this thread!

[Motown65]

Originally Posted by slaughter.mode

I just read this and decided to flash to Stage 2 v1.0 today with similar TP/TR settings and it has fixed some drivability issues I thought were physical DCT problems. Specifically problems with hesitation with D mode (any) going up from 1st > 2nd and down from 3rd > 2nd. It was at the point of 100% predictability for me to replicate the issues but now-nothing, it's smooth again. Wild. I suppose the 3 version options are there to support 3 different behaviors to accommodate your driving style/mods. Who knows but I am very happy I stumbled upon this thread!

Drop tp to 2

[Motown65]

XHP confirmed that if your tire diameter changes you need to change the axle ratio. Make sure you use the actual or effective gear ratio

[slaughter.mode]

Originally Posted by Motown65

Drop tp to 2

Yeah I have it at 2 with TR of 200. I will adjust as my tune ramps up and gets closer to the 600whp range.

[slaughter.mode]

I'm starting to notice that xHP is having the occasional failure when flashing. I don't change my configuration too often, so the failure rate is above 50% but this is becoming a bit annoying. I retry the flash and it usually goes right through. Is anyone else noticing more apparent failures with these more recent versions of xHP (on iOS)?

[Motown65]

Originally Posted by slaughter.mode

I'm starting to notice that xHP is having the occasional failure when flashing. I don't change my configuration too often, so the failure rate is above 50% but this is becoming a bit annoying. I retry the flash and it usually goes right through. Is anyone else noticing more apparent failures with these more recent versions of xHP (on iOS)?

when flashing multiple times a day i get failures alot lol. this is with an android tablet. I think its the procedure you do before flashing. Normally if im in a rush it fails but eventually goes through. Kinda embarrassing at the track haha

[Motown65]

also you guys going stage 2 flash. I dont believe you get the max line pressure with it

[slaughter.mode]

I opened a ticket with xHP (RBT Tuning) regarding the constant failing flashes. They had me send logs from the app to review. They stated that after reviewing the logs my vehicle's TCU (telemetry control unit) was in 'boot' mode. I am not aware of how to even place the TCU into a 'boot' mode or how to get out of it but their direction was to disconnect the negative terminal for 10 minutes and reconnect and try again. I did the 10 minutes, reconnected, set the time and date and flashed Stage 1. No issues. Sent logs again for them to review and am awaiting response to confirm my TCU isn't in this 'boot' mode anymore.

Unfortunately they do not allow us to view the logs so I am leaning 100% on their feedback. Will post their response.

[Motown65]

Originally Posted by slaughter.mode

I opened a ticket with xHP (RBT Tuning) regarding the constant failing flashes. They had me send logs from the app to review. They stated that after reviewing the logs my vehicle's TCU (telemetry control unit) was in 'boot' mode. I am not aware of how to even place the TCU into a 'boot' mode or how to get out of it but their direction was to disconnect the negative terminal for 10 minutes and reconnect and try again. I did the 10 minutes, reconnected, set the time and date and flashed Stage 1. No issues. Sent logs again for them to review and am awaiting response to confirm my TCU isn't in this 'boot' mode anymore.

Unfortunately they do not allow us to view the logs so I am leaning 100% on their feedback. Will post their response.

good to know and yea they got alot more control on their end. Wish we could get some more.

[slaughter.mode]

Received a response back from xHP they confirmed that my TCU is no longer in 'boot' mode and all seems well. I'd have to agree, flashes are working without any failures now.

[Motown65]

Who’s gonna take one for the team?

https://shop.rbttuning.com/products/...ibextid=Zxz2cZ

https://m.facebook.com/story.php?sto...ibextid=qC1gEa

[CedricB]

Here is the (nebulous) answer I got so far after 3 or 4 requests : « When you have bought the custom mapping service, you will receive an email where you have to mention all the changes you want, and after our engineer replies to you, you can provide him with engine logs (made with the MHD monitor module or BM3 logging tool)

There is no list of what is possible, but you will contact our DCT engineer directly, and he can tell you and explain everything you want to know. The main thing about our custom mapping service is that customers come to us with their wishes instead of choosing from a premade settings list. »

[Motown65]

Someone’s gotta take the chance and see if it’s worth it lol

[delz0r]

They should advertise it with more detail. It’s too expensive for such a boiler plate description. Ideally with an example.

[Motown65]

Alright guys I wanted to post an update to share my knowledge with everyone on xhp and how the dct behaves. So my testing has basically been mostly for drag racing and using launch control to get off the line.

Torque punch is best at 2. Maybe move it between 1-4 but 4 was hammering shifts and you don't want that because you will break traction.

Torque reduction seems to be best between 250-450

launch Control Settings

On the street and the air strip 0 in all 3 settings seems to be fine. This is on a 305/35/18 mt et ss though and im converting to a 305/45/17 mt et r as we speak.

Desired Slip- best around 0-15 if you have prep

Torque Initial- looking at dragy acceleration graphs its how high the very first bump goes. In engine logs if you look at rpm you'll see it shoot up quickly then level off which is the wheels spinning. I believe its best to not fully tune out this spin

Torque after Slip- in dragy graphs its the bump just after half way through 0-60 graph. You really only want to add this to smooth out the accel chart if it dips. Making it spike seems to make all 2nd a waste because you're slipping and it'll short shift into 3rd

Launch RPM- with ps2+ pi e85 cary tune 3400 seems to be good. Maybe 4000 on a prepped track

Also like to add if you're experiencing boggy shifts like the engine dies you need to make sure your torque reduction isn't set higher than you actual torque at clutch in you engine logs. If it is you'll get a torque limiter 128 and it'll basically go limp. The next is if you check logs and you get a torque limiter 1028 at the very top of a gear going into a shift you're losing traction and the wheels spin. I believe the DCT then delays the shift and lets the car hit off redline to allow wheel speed to catch up. You can fix this by using your per gear load or boost reductions. It seems like 60% in first isn't drastic either

[Narcosis]

Great data, thanks for sharing.

Originally Posted by Motown65

Alright guys I wanted to post an update to share my knowledge with everyone on xhp and how the dct behaves. So my testing has basically been mostly for drag racing and using launch control to get off the line.

Torque punch is best at 2. Maybe move it between 1-4 but 4 was hammering shifts and you don't want that because you will break traction.

Torque reduction seems to be best between 250-450

launch Control Settings

On the street and the air strip 0 in all 3 settings seems to be fine. This is on a 305/35/18 mt et ss though and im converting to a 305/45/17 mt et r as we speak.

Desired Slip- best around 0-15 if you have prep

Torque Initial- looking at dragy acceleration graphs its how high the very first bump goes. In engine logs if you look at rpm you'll see it shoot up quickly then level off which is the wheels spinning. I believe its best to not fully tune out this spin

Torque after Slip- in dragy graphs its the bump just after half way through 0-60 graph. You really only want to add this to smooth out the accel chart if it dips. Making it spike seems to make all 2nd a waste because you're slipping and it'll short shift into 3rd

Launch RPM- with ps2+ pi e85 cary tune 3400 seems to be good. Maybe 4000 on a prepped track

Also like to add if you're experiencing boggy shifts like the engine dies you need to make sure your torque reduction isn't set higher than you actual torque at clutch in you engine logs. If it is you'll get a torque limiter 128 and it'll basically go limp. The next is if you check logs and you get a torque limiter 1028 at the very top of a gear going into a shift you're losing traction and the wheels spin. I believe the DCT then delays the shift and lets the car hit off redline to allow wheel speed to catch up. You can fix this by using your per gear load or boost reductions. It seems like 60% in first isn't drastic either

[CedricB]

Have you used the latest release? Apart from the look and feel, there is no new features that is working: read adaptations doesn’t work, wt least for me. Rest is working just as before. No new maps.