[F36 435d]

Took the 435d Xdrive for a retune yesterday for its 2nd Birthday Present.

Wagner Evo 2 Competition Intercooler
Back Box Delete (Cybox Exhaust)
K&N Air Filter
Alpina Gearbox Remap (Simon from Bavarian Coding)
Top Speed Limiter Removed (EST 195MPH)

4 hours later 400HP & 839NM !
(On a accurately calibrated Dyno Developments 4WD Rolling Road)

I had it originally remapped over a year ago and it has been running 370 BHP & 760NM. Since then I have fitted the intercooler and been back for a re tune and achieved the above results of 400 HP & 839NM.

It is a custom Remap, so if ever you decide you want your car Remapping here if you want you can decide to cap the torque at 700nm.

Rick is a Bmw Specialist and has a 4wd rolling road. He has tuned many of the 35d xdrive, there are a selection of examples of the Unicorn Motor Developments Facebook Page. Rick also repairs bricked Ecus.

Thanks to Rick at Unicorn Motor Developments !

[camelot1971]

Do you get any smoke when revving hard? I presume the DPF is retained? Just curious, as I have heard heavily tuned diesels put out a lot of smoke.

My pre DPF one does occasionally, especially after a long motorway run!

[F36 435d]

Originally Posted by camelot1971

Do you get any smoke when revving hard? I presume the DPF is retained? Just curious, as I have heard heavily tuned diesels put out a lot of smoke.

My pre DPF one does occasionally, especially after a long motorway run!

No smoke at all, the tips are completely soot free and shiny no matter how hard or far you drive it. EGR & DPF still place.
Smoke on a tuned diesel which has a Dpf is a sign of a bad map I think.

[YR430D]

Excellent result thanks for sharing

[A15X]

😱 400bhp! Nice

[Mr Whippy]

Any before/after @ wheels plots?

Should be nice and fast(er) now.

Not sure how people dare run such an engine with a K&n though.
In my experience no one cleans/oils properly and they still let fine particles through... for arguably zero gain. Nice.

[F36 435d]

Thank You all
Regarding the Air Filter it's still relatively new yet, however when it is dirt I'll clean it, lightly re oil it and put it back in.
Standard the car run 313 BHP & 650NM on this dyno.

[Red F30]

Blimey that's some result! I didn't realise that you could get so much torque out of the 335d.

[F36 435d]

Originally Posted by Red F30

Blimey that's some result! I didn't realise that you could get so much torque out of the 335d.

Originally Posted by Red F30

Blimey that's some result! I didn't realise that you could get so much torque out of the 335d.

Yes definitely, they are known to be torque monsters and perform amazing when remapped !

[Ajs_435d]

Originally Posted by F36 435d

Took the 435d Xdrive for a retune yesterday for its 2nd Birthday Present.

Wagner Evo 2 Competition Intercooler
Back Box Delete (Cybox Exhaust)
K&N Air Filter
Alpina Gearbox Remap (Simon from Bavarian Coding)
Top Speed Limiter Removed (EST 195MPH)

4 hours later 400HP & 839NM !
(On a accurately calibrated Dyno Developments 4WD Rolling Road)
Thanks to Rick at Unicorn Motor Developments !

So you made less torque this time roughly 20 lb ft less, as per your FB post i thought you made 370BHP pre tune, then jumped 30 BHP!??

Unicorns dyno seems to make anything between 370 to high 390's for stock x35ds. I still stick by it seems to produce pretty inconsistent figures on these cars, on other cars it doesn't seem an issue. It doesn't seem to be a dyno dynamics printout (i could be wrong since i use DD and land & sea)

The Wagner intercooler, filter and backbox add very little (as per my findings of the FMIC adding ~3BHP) BUT consistent good IAT's. Like I've said in the past with the intercooler its flow or rather pressure drop and lower IAT's. Wagner don't even produce any dyno printouts for it but do for most other cars inc BMW.

I guess if you think <10 BHP and little power throughout is worth 1k+ that's cool and i commend you for trying the mods. The key is here doing a dyno before and after on the same day obviously sometimes we cant do that and the temperature and pressure make a big difference to figures this time of the year its very good for figures since its cold and high pressure (to an extent colder air is harder to compress for a diesel).

So for arguments sake we could say £1k+ has netted you 7 BHP, the curve looks pretty similar based on your signature figures.

Whilst your car is making good figures (I think its most likely pushed hard depends on the multipliers etc) i don't believe those mods do much for the power, when i say much i mean value for money but they were never going to.

And don't take this the wrong way like you did last time and thanks for posting.

[F36 435d]

Originally Posted by Ajs_435d

So you made less torque this time roughly 20 lb ft less, as per your FB post i thought you made 370BHP pre tune, then jumped 30 BHP!??

Unicorns dyno seems to make anything between 370 to high 390's for stock x35ds. I still stick by it seems to produce pretty inconsistent figures on these cars, on other cars it doesn't seem an issue. It doesn't seem to be a dyno dynamics printout (i could be wrong since i use DD and land & sea)

The Wagner intercooler, filter and backbox add very little (as per my findings of the FMIC adding ~3BHP) BUT consistent good IAT's. Like I've said in the past with the intercooler its flow or rather pressure drop and lower IAT's. Wagner don't even produce any dyno printouts for it but do for most other cars inc BMW.

I guess if you think <10 BHP and little power throughout is worth 1k+ that's cool and i commend you for trying the mods. The key is here doing a dyno before and after on the same day obviously sometimes we cant do that and the temperature and pressure make a big difference to figures this time of the year its very good for figures since its cold and high pressure (to an extent colder air is harder to compress for a diesel).

So for arguments sake we could say £1k+ has netted you 7 BHP, the curve looks pretty similar based on your signature figures.

Whilst your car is making good figures (I think its most likely pushed hard depends on the multipliers etc) i don't believe those mods do much for the power, when i say much i mean value for money but they were never going to.

And don't take this the wrong way like you did last time and thanks for posting.

Originally Posted by Ajs_435d

So you made less torque this time roughly 20 lb ft less, as per your FB post i thought you made 370BHP pre tune, then jumped 30 BHP!??

Unicorns dyno seems to make anything between 370 to high 390's for stock x35ds. I still stick by it seems to produce pretty inconsistent figures on these cars, on other cars it doesn't seem an issue. It doesn't seem to be a dyno dynamics printout (i could be wrong since i use DD and land & sea)

The Wagner intercooler, filter and backbox add very little (as per my findings of the FMIC adding ~3BHP) BUT consistent good IAT's. Like I've said in the past with the intercooler its flow or rather pressure drop and lower IAT's. Wagner don't even produce any dyno printouts for it but do for most other cars inc BMW.

I guess if you think <10 BHP and little power throughout is worth 1k+ that's cool and i commend you for trying the mods. The key is here doing a dyno before and after on the same day obviously sometimes we cant do that and the temperature and pressure make a big difference to figures this time of the year its very good for figures since its cold and high pressure (to an extent colder air is harder to compress for a diesel).

So for arguments sake we could say £1k+ has netted you 7 BHP, the curve looks pretty similar based on your signature figures.

Whilst your car is making good figures (I think its most likely pushed hard depends on the multipliers etc) i don't believe those mods do much for the power, when i say much i mean value for money but they were never going to.

And don't take this the wrong way like you did last time and thanks for posting.

Hi Yes,
Ok whwhen i first took the car in standard form it made 313 BHP & 650NM. On the same day I had it remapped with just a custom Remap it made 362 BHP & 760NM. On this occasion the tyres were very hot as they were brand new and overheating showing less figures.

I then put a few thousands miles on, wore the tyres in more and did the back Box Delete and a K&N air filter and went back for another dyno run to see what it were outputting. The map were not changed and it made 393 BHP & 864NM. I were very surprised by this.

On Saturday when I went back, I took the graphs with me. This time it had the Wagner Evo 2 Competition Intercooler & Alpina Gearbox Remap only different (I know the Alpina won't make a difference to peak figures)

4 hours later when he finished he explained that last time it were on the dyno the only reason he can think it showed so much power is that it could've climbed the Dyno making it show inflated figures. In actual fact on Saturday when it were run on the rolling road it were making 370-375 BHP (unsure on torque)

He altered the map and it made consistent 400 BHP runs & 619/839NM torque. So he said he had increased the power by about 30 BHP, smoothed the torque out and that is the final accurate solid result of 400 BHP & 839NM.

(Confusing I Know haha)

It is a 4wd Dyno Developments Rolling road for definite.

Have a look on Unicorn Motor Developments Facebook page there a few 335d/435d drives on there 3 with Wagner's.

Hope this helps the understanding and no offence taken btw

[F36 435d]

Originally Posted by Lobb

Love the colour of your car. Any better pictures?

Cheers ! It is Speed Yellow Individual. You should find some on my signature buddy.

[Ajs_435d]

Originally Posted by F36 435d

Hi Yes,
Ok whwhen i first took the car in standard form it made 313 BHP & 650NM. On the same day I had it remapped with just a custom Remap it made 362 BHP & 760NM. On this occasion the tyres were very hot as they were brand new and overheating showing less figures.

I then put a few thousands miles on, wore the tyres in more and did the back Box Delete and a K&N air filter and went back for another dyno run to see what it were outputting. The map were not changed and it made 393 BHP & 864NM. I were very surprised by this.

On Saturday when I went back, I took the graphs with me. This time it had the Wagner Evo 2 Competition Intercooler & Alpina Gearbox Remap only different (I know the Alpina won't make a difference to peak figures)

4 hours later when he finished he explained that last time it were on the dyno the only reason he can think it showed so much power is that it could've climbed the Dyno making it show inflated figures. In actual fact on Saturday when it were run on the rolling road it were making 370-375 BHP (unsure on torque)

He altered the map and it made consistent 400 BHP runs & 619/839NM torque. So he said he had increased the power by about 30 BHP, smoothed the torque out and that is the final accurate solid result of 400 BHP & 839NM.

(Confusing I Know haha)

It is a 4wd Dyno Developments Rolling road for definite.

Have a look on Unicorn Motor Developments Facebook page there a few 335d/435d drives on there 3 with Wagner's.

Hope this helps the understanding and no offence taken btw

Cool, must be a rocket ship!

[Soul_Glo]

How much was the map?

[F36 435d]

The map were £500, that were for 4 hours work, multiple dyno runs, data logs, diagnostics, custom remap fine tuned to the car. Before & after graphs are included too.
The ECU has to be taken out on the F Series.

[F36 435d]

Originally Posted by Lobb

The yellow and black works really well

Thanks buddy

[smithers330d]

I'd be worried about my gearbox with 839nm of torque. Isn't it generally accepted that the safe maximum is 700nm with these ZF boxes?

Still, great results!

[Torque of the Devil]

Only a matter of time before that lunches itself.

[robbiep]

Originally Posted by smithers330d

I'd be worried about my gearbox with 839nm of torque. Isn't it generally accepted that the safe maximum is 700nm with these ZF boxes?

Agreed. Well over max ZF spec for it.

[Hooded]

Originally Posted by smithers330d

I'd be worried about my gearbox with 839nm of torque. Isn't it generally accepted that the safe maximum is 700nm with these ZF boxes?

Still, great results!

Yep, but they're probably still fine around 750nm realistically. I certainly wouldn't want to be running above 800nm though, and there's absolutely no need to even if the car really is making 400bhp.

Great looking car anyway

[F36 435d]

The gearbox on the 35d xdrive has a torque limit of 700nm. That is for OEM durability testing which is very stringent. In practice they take more. The other thing to note is that the torque figure is developed by holding the car steady on the Dyno at full throttle - on the road you are never going to hit it as the engine will always be accelerating.


I have done lots of research on the gearbox. The gearbox has a limit of 700nm. Obviously the more power you put through it, the more strain it will have. If you put 705nm through it, it isnt going to break. 700nm is what the gearbox Manufacture (ZF) claim as the safe limit. There is a margin over 700nm what the gearbox is capable of taking. There are many remapped Bmws exceeding the 700nm limit. At around 800nm or even more and they have covered many of miles and never had any problems. In day to day normal driving back and forward to work I don't use all the power the car has and it probably won't exceed 700nm anyway so the full amount of power is not being used every time i drive the car. I also rarely Launch the car and i always make sure the car is warmed up fully before it is driven hard. I also plan to service the gearbox at 40,000 miles (before its due at 50-75k miles) I never use the car round tracks or for drag racing etc..
I don't use the car for towing or any heavy loads, and if I drive it hard I will leave the engine running for a minute or too to cool the engine&transmission before getting out.

It's only on 19k and I probably won't have it any more than another 2-3 years. I will wipe the map before it goes.
I have been studying the torque usage via the sports display. Just driving normally back and forward to work on the motorway and normal roads the maximum amount of torque i have used is 550nm, so it isnt regular you are using over 700nm. Also, i highly doubt the massive number of tuning companies would be willing to put your car at risk, they must have confidence in the gearbox otherwise they would have unhappy customers no?

The torque is also brought in gradually to protect the gearbox.

As it is a custom Remap you can request it to be capped at 700nm if you want but the large majority of people which get them remapped aren't really bothered and go over 700nm.

However, if people disagree then I can completely understand why.

I also have a mate in Malta which has a 335dxdrive which is running the same map as mine now because he has also just fitted an intercooler, Unicorn sends the software to there dealer in Malta, and his car has done 75k + miles and he takes it to the drag strip most weekends and drives it everywhere like it's stolen. He has serviced his Gearbox once and it is perfect.

Note as well that the car was running 20nm as standard on the rolling road so if that is out and the car is putting a true figure of 630nm rather than 650nm, 20nm can be knocked off as it's actual output.

But at the end of the day, I'm happy with it

[Hooded]

I completely agree with your points about how your not using all of the torque most of the time on your daily commute etc, and I also agree that the box most likely can handle more than ZF claim is the safe limit (that's why most company's remap them to around roughly 730nm).

Personally though I wouldn't want to put 800nm+ through the drivetrain as I don't see any need at all to have a low down torque peak so high. Even at say 400bhp a safer peak of around 770nm would be high enough low down, then hold a flat torque curve that goes as far up the rev range as possible before dropping off to get the 400bhp max peak Power figure still.

Then again if your only keeping the car a couple of years .. I tend to keep mine longer though so would be more conservative with max peak torque figures.

Cheers