XHP DCT - Experience Thread

NoGuru

Captain
Jan 9, 2018
1,114
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Just North of Detroit
Ride
BMW 335is
hey guys long time reader some great infomation here i have 2011 bmw 335is dct FBO vargas frb-lites running a trebila bef. Rear end is i guess youd say FBO solid subframe bushings LSD etc.. been using the xhp stage 3 with default settings. xhp has done update for the custom maps for D and S wondering if anyone on here with similiar fbos has any settings recommendations to get the shifting a little more connected with the tune (snappy) lets say

thanks again
From what I have seen every car responds different to changes with xHP. But if you wanted it to feel more snappy I would increase Torque punch 1 at a time because they can get very punchy.
 

carabuser

Sergeant
Oct 2, 2019
362
233
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UK
Ride
Z4 35i & 335i
hey guys long time reader some great infomation here i have 2011 bmw 335is dct FBO vargas frb-lites running a trebila bef. Rear end is i guess youd say FBO solid subframe bushings LSD etc.. been using the xhp stage 3 with default settings. xhp has done update for the custom maps for D and S wondering if anyone on here with similiar fbos has any settings recommendations to get the shifting a little more connected with the tune (snappy) lets say

thanks again
I don't think there's much improvement to be made with the sliders in xHP, the OTS maps are set up pretty well. The biggest influence on how the DCT shifts is from the DME. Post a log of some WOT shifts.
 

dctiS

New Member
Sep 15, 2021
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carabuser

Sergeant
Oct 2, 2019
362
233
0
UK
Ride
Z4 35i & 335i
hey guys thank you for the quick replies. heres a log on my old set up custom flash and vvt stage 1s with td04 center and billet wheels
That's not really a great log, you have a lot timing corrections and fuel trims are flatlining.

I would work on getting a clean log before looking at shifts. STFT below +/-5% and minimal corrections. You might have to step the boost back a few PSI and build up slowly.

You can't tell the entire story from a DME log but you want to see timing only dip for 1 scan cycle, any more and the shift is not completing properly. The rest has to be done by feel really. xHP is well configured but only when the reported torque is accurate, with the JB4 or even with flash only boost scaling you will start to lose accuracy.

MHD released an update recently so that DCT users can now target the full 21.3PSI that MBoost allows. So you should speak with your tuner about reporting load more accurately.
 

dctiS

New Member
Sep 15, 2021
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sounds like a plan. octane is a limiting factor, i do have a methonal kit going in shortly when have some time.

thank you again