Discussion in 'Technical Troubles' started by Stokielad, Oct 25, 2018.
I wonder what gearboxes the 640d’s run then as I though they both have the same engine
That's good advice from @bishbosh. The transmission will be the limiting factor on handling any power increase. I chipped a Golf GTi PD150 to get an extra 20% torque. It felt great each time I used the acceleration, but 6 weeks later my clutch was Kaput. Not worn out, but distorted the pressure plate. I had to shell out for a heavy duty replacement. Manuals tend to be capable of handling more power/torque than automatics, so just use some caution.
I did my research when I remapped my 530d and I was told by many people that the auto transmissions were stronger than the manuals.
Completely agree....I won’t be getting the remap done if any of the mechanical parts can’t handle it.
The 8hp70 has a max torque handling of 700Nm.
I think auto boxes actually handle torque better because of the torque converter, that’s why the 335d’s have always been automatic only. The GS6-53 manual fitted in E90’s has the same 600Nm torque limit as the 6hp26 Auto but would need a strong clutch to transmit it effectively.
Usually the torque converter is the limiting factor. I remember the e90 320d performance power kit - the auto version cost more as it included an uprated torque converter.
which engine was that for though?
The 320d's seem to have the lower rated 6hp19 so must be that the torque convertor was rated lower than the max of the box or something as the box is listed as a 400Nm on its wiki.
The manuals depend on engine more so with earlier ones having 370Nm rated and later having 470Nm
That was for the n47 engine.
So I’m assuming the
Oh dear so hat rules out then DMS remap as 560lbft equates to 759NM so looks like it will shorten the life of the transmission
If the tuner actually tunes it properly, i.e. On a rolling road rather than just sticking on a generic map, then you can ask them to limit torque to something sensible - 680Nm for example.
I give them then a call on Monday as there website states they use a rolling road for all their remaps, but not sure if that just for the development of them rather than installation the map into customers cars
To limit the torque they can adjust the maximum boost available for each gear
So I’ve receieved the following response back from my local dealer with regards to the superchips remap. As it’s a mobile service I’m assuming it’ll be a generic installation rolled out for all 335d, and not a bespoke installation. Or is that as bespoke as you can get.
See below :-
BMW 335 d/xDrive F30/31 (313HP)
Engine type : Turbo-Diesel
Engine size : 2993 cm3
Engine code :N57 D30TOP
Cylinders : 6
Original bhp : 309
Original nm : 630
BHP increase : 66
NM gain : 123
Lb/Ft gain : 91
Boost at standard : 31 psi 2.1 bar
Boost modified : 34 psi 2.3 bar
Speed Limit Removal : Available
Price (inc. VAT) : £339.00
Call out £65.00
Exactly 700 NM max
I used Simon from emaps a few yrs ago he was very good
Simon remapped my E60 530d a few years ago too, he came down to the Spectrum centre Spectrum centre in Guildford and about 8 or 9 of went in different slots. He was very good