[Alex.Devol]

Hi guys,

I'm trying to get the absolute most out of my 325d without harming it.
Details about the similarity / differences between the 3er 6pot diesel engines seems to come up occasionally when off topic on other threads & i'm trying to learn more about it without hijacking someone else's question. So..

Obviously the n57 varies between models & age, I have a 2011 325d LCI e92 (204ps) and want to know how this specifically differs from its more powerful peers.

As i understood it the only difference between this and the 330d is either the fuel injectors + map, OR simply the map, and so effectively could be tuned to match a remapped 330d?

If anyone with insight into the facts on this could share i'td be greatly appreciated.

[andy9188]

I was told by dms that the 2011 lci engine differences in 325/30 is purely down to mapping. My old 09 lci had the smaller injectors but the part number for the turbos were the same from bmw.

[andy9188]

bbest thing to do is phone a reputable tuning company imho

[Alex.Devol]

Just phoned rob at dms after your pm, sounds like I can delete this thread! Booked in to turn my stock 325 into a mapped 330. Couldnt be happier, thanks for the tip mate.

[ELD70]

Is your car a manual or auto?

[jquan1]

I thought the exhaust manifold was more restrictive on the 325d also?
Perhaps thats just on the pre-lci versions.

Otherwise I'm sure more people would of bought 325's rather than a 330.

[Alex.Devol]

ELD70: my car is an auto msport.

jquan1: that's what i thought, and until now have found lot of uncertainty around the subject. I asked DMS if there were any other differences, gearbox, injectors etc. and Rob said since the LCI the e92 is simply a 330 with a downgraded map.

[bmminiparts]

Have a word with Stan at Ecotune, to replace the DPF as this will free up the turbo, a lower spool and will increase the lifte of the turbo as there is less restriction on it from the DPF.

An increase of 80 bhp and you can have 3 maps, the standard car map, an eco map and performance map. Change them when ever you want in 5 minutes.

Torque is up to 515nm i think too!

[andy9188]

Glad I could help. Dms is really is ahead of the game with performance tuning. What bhp figures did he quote about 300.

[Bob S]

Just had DMS up to do a remap on my lci version 325d. Outstanding difference in performance and mid range power. Well pleased and a really helpful company that were a pleasure to deal with. Very happy

[Alex.Devol]

Originally Posted by Bob S

Just had DMS up to do a remap on my lci version 325d. Outstanding difference in performance and mid range power. Well pleased and a really helpful company that were a pleasure to deal with. Very happy

Hi Bob, congratulations! did they give you any figures or a chart? ill be getting the remap done mobile too so won't get chance to do a rolling road for a while afterwards

[jrah]

I used to have a mapped 325d and it never missed a beat!

Was rather quick as well

[Bob S]

Alex - I haven't had it near a rolling road yet......still enjoying the performance improvement! The indication from DMS was that it would get to c 290bhp and, doing the conversion, 590nm torque, which is a huge difference from stock figures (40% up?). Seems to me a good investment in the upgrade as that puts it towards the 335d figures does it not?

[BanziBarn]

Yeah, the later e90 325Ds are Defo the way forward if you want massive increases in power from just a map! No point going for the 330 unless you're keeping it standard.

[SO8]

I have spoken to DMS re remapping my LCI 330d ... they seemed very knowledgeable.

How does the power come in on your remapped 325d now ? Does it spin up in the dry in 2nd gear on kickdown or does the t/c have to cut the power ?

[Bob S]

I'm still really getting the hang of it tbh. It's certainly livelier up to 2k but progressively so and then after 2k it just comes in with a huge amount of torque. Makes overtaking embarrassingly easy. I'm going to give it a good run tomorrow. 300 miles on good A roads and I'll see what it really does. Mine's a manual so I'm always in control of any spin ......... allegedly! Very impressed with DMS, they kept me well informed throughout the whole process and Rob who did the work on my car was excellent.

[SO8]

Thanks, interesting to hear. Mine is an auto so I am worried kickdown will result in massive wheelspin followed by warp speed ... which, with the associated lack of control, is not what I want. Having a manual you have the best ability to control it !

I had a Golf GTI Edition 30 DSG mapped to 300bhp and when you kicked it down it was incredibly quick but actually uncomfortably so. I changed it for a Z4M ... which had more power but was so much easier to use.

I guess I am concerned with the narrow power band of a diesel the extra oomph will be too sudden for my liking ... that and warranty concerns for my 330d LCI.

[BanziBarn]

Originally Posted by SO8

Thanks, interesting to hear. Mine is an auto so I am worried kickdown will result in massive wheelspin followed by warp speed ... which, with the associated lack of control, is not what I want. Having a manual you have the best ability to control it !

I had a Golf GTI Edition 30 DSG mapped to 300bhp and when you kicked it down it was incredibly quick but actually uncomfortably so. I changed it for a Z4M ... which had more power but was so much easier to use.

I guess I am concerned with the narrow power band of a diesel the extra oomph will be too sudden for my liking ... that and warranty concerns for my 330d LCI.

Best not to use kickdown I reckon, just use the paddles to change down and then feed the power in more gently

[Alex.Devol]

I don't see how the kickdown on a well tuned 325 / 330d would be uncontrollable when you consider even the huge torque coming from the kickdown or downshift on a 335d is more than capable of being controlled and can all be put to good use in the right conditions. If you're running your stock bridgestones then id say you are undoubtably going to lose traction on various surfaces or weather conditions, but a decent tyre should put this right. Even better, if you have the budget for it, i would say that the Quaife Limited slip diff mod is by far the best mod i have made to any car i have owned, even after the first few days it's clear that the improvement in traction control is staggering and this is really affecting the acceleration of my car. I'd recommend it to anyone as the first mod they should make to their e9x