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  #1  
Old 06-18-2010, 08:12 PM
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Ever wanted to add some extra hp's to your X5 diesel?

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Last edited by AlexK; 03-06-2011 at 05:23 PM.
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  #2  
Old 06-18-2010, 09:07 PM
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Looks like fun.

I am still concerned with BMW dumping the DME and finding sustained overboost data in the logs. Yes you can delete 'codes', but I suspect you cannot wipe out the datalogs that only the factory can access.

Nobody has independently confirmed the inability of BMW to detect- and BMS surely is not standing behind the product with "If BMW detects this tune and denies a claim, we will cover it". (Arguably they are ~10-15% of the price Dinan charges!)


For those with their eyes open, I look forward to hearing the results.

A
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Old 06-20-2010, 05:35 PM
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If it's an ECU upgrade or plug & play, they rarely pick it up, if ever. The only cars they watch with the eagle eyes are the(330d/530d,135i/335i's), thats in South Africa & it's also due to so many warranty claims on turbos etc...
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Old 06-20-2010, 07:43 PM
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Originally Posted by Sher KamaL View Post
If it's an ECU upgrade or plug & play, they rarely pick it up, if ever. The only cars they watch with the eagle eyes are the(330d/530d,135i/335i's), thats in South Africa & it's also due to so many warranty claims on turbos etc...

If this statement has any validity, I would be surprised..."rarely" implies you have some kind of data from which to support your statement... is this in South Africa, or Johannesburg, or worldwide, or based on what you hear from a few forums?

There is an SIB specific to the 335diesel, same will apply to the X5 35d. Rest assured that if there is major engine issues- even if totally unrelated to any possible mod- the service engineer at BMW will look at the DME logs.

This failure: X5 xDrive35d catastrophic engine failure - bimmerfest - BMW Forums

This post: bimmerfest - BMW Forums - View Single Post - X5 xDrive35d catastrophic engine failure

You can be sure that had there been one digit of programming that looked askew, BWM would have blamed that connecting rod bolt on the mod!

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  #5  
Old 06-21-2010, 10:44 AM
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Im talking about South Africa.
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  #6  
Old 06-21-2010, 01:09 PM
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Quote:
Originally Posted by AlexK View Post
Your concern is valid, but from what I've read on other forums it doesn't look like anyone had such issues with Terry's non-diesel chips. Personally I would gladly try it, problem is I don't personally own/lease an X5d, I can only drive one without doing any mods to it
I didn't have to look far to find a blown (non-diesel) engine using one of Terry's tunes. The details of one example were posted on e90post.com in the turbo forum, on the same day as your post, above.

I don't think it is worth getting into the "who's tune is better" argument, suffice it to say that if you want to push the boost beyond both the engine design limit, and the safety setting on the overboost module, then breaking a piston and blowing an engine isn't too surprising. We could say that Terry was just unlucky that it was his customer that got so much attention. On the other hand, Shiv points out that Terry's tunes don't include ignition timing control, or the ability to read A/F ratio, or the ability to monitor timing/knock (other than using the standard knock sensor), and that Terry supplied a custom tune to an owner running 22 psi, 93 octane, meth injection, and non-stock spark plugs with a single electrode. Perhaps a blown engine isn't a surprise then.

The users of various tunes have also had issues with broken half shafts, higher incidences of HPFP failures, injector failures, and so on. That isn't at all surprising to me given the amazing power they are getting out of the N54, and the resultant heat that power creates in the engine.

Full (and quite entertaining) details on the blown engine with the Juice Box here:

http://www.e90post.com/forums/showthread.php?t=399289

Would I put a chip on my 535? Yes. It would not push the envelope so much, though. It would be a chip that was fully tested prior to me buying it. It would also be a chip that included the safeties that tuners like Terry don't seem to consider necessary. All that means that it would cost more than the very low cost tunes that Terry is selling.
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Old 06-21-2010, 03:46 PM
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Originally Posted by AlexK View Post
That's an interesting thread, I haven't read that before. Personally if I had a compatible car (I don't) I'd still rather try a cheaper mod instead of overpaying 2x-3x more for a device that achieves similar results but with supposedly better safety programming. I could not gather any significant (to me) data which would actually prove that one tuner's program is safer than the other and I am highly unlikely to use such device in a specific configuration (using extra non-stock components such as different spark plugs) not tested by a mod's creator.
If there's one thing not worth the pennies saved it is tuning. That few hundred bucks won't look too bad once you get a bill to replace the engine
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Old 06-21-2010, 05:18 PM
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If there's one thing not worth the pennies saved it is tuning. That few hundred bucks won't look too bad once you get a bill to replace the engine

The linked thread makes reference to the 35i engine costing $20k from the BMW parts department. I am not sure if that is true or not, but even if you just need a block, head, pistons, turbos, etc, it won't be cheap. It isn't just safety features, but rather how complete the tune, how many variables they are managing, vs just overboosting.
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Old 06-21-2010, 06:23 PM
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Agree +2

So many people buy a "tune" like it is a wheel or air filter.... it is so much more complicated than that. Ideally you are buying wisdom and knowledge and skill - for a tune it is imperative that you know and trust the tuner, and that they have demonstrated competence in the field.

As JCL notes, there is so much more than fooling the ECU/DME/DDE into overboosting.

It can be done safely, but someone with that skill will not be the low bidder...

A
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  #10  
Old 06-22-2010, 02:14 AM
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Originally Posted by JCL View Post
I didn't have to look far to find a blown (non-diesel) engine using one of Terry's tunes. The details of one example were posted on e90post.com in the turbo forum, on the same day as your post, above.
Yup, one and only example.

Quote:
Originally Posted by JCL View Post
The users of various tunes have also had issues with broken half shafts, higher incidences of HPFP failures, injector failures, and so on. That isn't at all surprising to me given the amazing power they are getting out of the N54, and the resultant heat that power creates in the engine.
HPFP failures have nothing to do with tunes or piggybacks. Same can be said for injector failures. These are known problems on all N54's, including non-modified which the majority have no mods.

Broken half shafts are from people drag racing their cars. Drag radials plus sticky track can bust some half shafts.

Quote:
Originally Posted by JCL View Post
We could say that Terry was just unlucky that it was his customer that got so much attention. On the other hand, Shiv points out that Terry's tunes don't include ignition timing control, or the ability to read A/F ratio, or the ability to monitor timing/knock (other than using the standard knock sensor), and that Terry supplied a custom tune to an owner running 22 psi, 93 octane, meth injection, and non-stock spark plugs with a single electrode. Perhaps a blown engine isn't a surprise then.
You fail to mention. The car owner was running a prototype turbo upgrade, methanol injection. And was told to run higher octane gas, which he did not. Push the limits with 500+whp, then something can break with stock internals.

Last edited by M3_WC; 06-22-2010 at 02:30 AM.
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