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      11-29-2012, 04:51 PM   #1
peeti
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Dinan SII for 135i n55

I've read a ton of posts here on the merits of one tune versus another, the true HP/TQ versus posted by the manufacturers etc. This isn't one of those posts.

I am not afraid of tunes or messing with the engine having been the testbed of custom tuning for my old c63 mercedes. But I still tend to take a conservative approach, hence my choice on the Dinan. Had one of the "injector" style code sets been available for my n55, I would have gone that route, but since not a one is out there, I got tired of waiting.

I'm really glad I did. Sure it's not cheap, but my dealer did the work, the did not void out the warranty when doing so (I thought they would have considering) and the whole process was smooth as all hell.

What I mainly wanted to get across in this post is the secondary benefits of this particular tune. Others may do this too - but this is something I've not experienced in my previous (non BMW) tunes.

Sure there is additional TQ throughout, and mainly in the higher RPM bands. But what no one has mentioned thus far are two pretty key things. First, throttle response: in a word, this is how every drive by wire car should feel. Ironically, watching the tach needle, and tapping the gas pedal produce two very different observations. The tach needle spools up just as you'd expect, but at first you've got this "WTF? I just paid lots why didn't it improve" thought. Then your ears kick in and you realize it's just the indicator needle - the engine is revving MUCH quicker, in fact there is nearly 0 delay from tap on gas pedal and engine revs.

Second, and this one is really surprising to me, the Dinan tune looks to hold the wastegate a bit on clutch-in. What I mean by this is picture... driving, 1st gear, clutch in, revs drop a bit, change gear, clutch out, gas (all in a second or so). If done slowly enough, you can visibly see the RPM drop in the time it takes to clutch/shift/declutch/gas. Unless you're really power shifting, it's usually enough to make the car stumble a bit due to the RPM mismatch after declutching.

On the tune, however, the pressure in the system is kept a tiny bit longer. The wastegate doesn't dump the pressure on clutch-in right away. As a result, the period of tolerance increases a bit. Maybe .5-1 seconds, after I realized it and paid attention, it almost seems too long. But I won't complain. Shifts are silky smooth now - and I've been driving stick over 25 years exclusively.

All in all, the car is much more lively and the power is nice, but these two undocumented features are worth the price of admission on their own.

Hope this helps one of you guys that's on the wire deciding which way to go.

Cheers.

P.S. Yes, I've had a CDV-ectomy prior to this.
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      11-29-2012, 07:05 PM   #2
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Glad you're happy with it. I'd be all over it if there was a way to integrate a downpipe. But that kind of nullifies the idea of warranty protection. With a dp I bet the throttle response would really be impressive.
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      11-29-2012, 08:18 PM   #3
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Planning on a Dinan SII as well, the gains are impressive, 355Bhp 545NM torque.

Plus still get warranty on top of them, a peace of mind.
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      11-30-2012, 12:58 PM   #4
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Yep. i did it back in February on my 2012 and couldn't be happier. Agree completely with the OP comments. i have the DCT and WOW. I have a lot of experience with tuned turbos/superchargers. Had a 2010 S4, STI and a B5S4. And the 135 is the best of the bunch. Next up... S3.
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      11-30-2012, 01:20 PM   #5
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I keep reading great things about the S2 update with Dinan. Is there an order in which to do these? I have been lurking for a bit and am interesting in going forward with some updates to stock.
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      11-30-2012, 01:52 PM   #6
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Loved my S2 on my 09 135. Just patiently waiting for them to release something for my 13 135is.
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      11-30-2012, 05:38 PM   #7
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There is no order, S1 is nonexistent anymore I believe. S2 is their n55 base and S3 adds some if you can meet the requirements. If you buy S2 they will credit full price of that toward the S3 - so it's win-win if you keep going.
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      12-01-2012, 06:31 PM   #8
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Wow

Quote:
Originally Posted by peeti View Post
There is no order, S1 is nonexistent anymore I believe. S2 is their n55 base and S3 adds some if you can meet the requirements. If you buy S2 they will credit full price of that toward the S3 - so it's win-win if you keep going.
Wow, that's awesome to know. I was looking at the S2/3 and the $500 difference seemed to make me wonder if that was the best option, however if they do the credit that really makes me want to jump on the S2 at least now. Thanks.
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      12-01-2012, 06:43 PM   #9
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Quote:
Originally Posted by tHegeRm View Post
Loved my S2 on my 09 135. Just patiently waiting for them to release something for my 13 135is.
I'm curious how this will work out. Will the gains be on top of the PPK gains, or will it nullify the PPK? I contacted Dinan and they said they have nothing yet, and they didn't mention even working on it, so I don't know if something's coming. If the product is the same, then we'd be paying the same $ for less gain since we're starting at 320 hp. Hopefully it'll be a different product altogether.

Oh, and get into the 135is thread and put up some pics of your car!
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      12-01-2012, 06:47 PM   #10
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Quote:
Originally Posted by bigtexatx View Post
Wow, that's awesome to know. I was looking at the S2/3 and the $500 difference seemed to make me wonder if that was the best option, however if they do the credit that really makes me want to jump on the S2 at least now. Thanks.
If you have the S2 the S3 is 500 bucks but you need the HP Intercooler and Oil Cooler. Makes it about a 4K upgrade that for me is a very hard pill to swallow.
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      12-01-2012, 08:51 PM   #11
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Quote:
Originally Posted by mb135is View Post
I'm curious how this will work out. Will the gains be on top of the PPK gains, or will it nullify the PPK? I contacted Dinan and they said they have nothing yet, and they didn't mention even working on it, so I don't know if something's coming. If the product is the same, then we'd be paying the same $ for less gain since we're starting at 320 hp. Hopefully it'll be a different product altogether.

Oh, and get into the 135is thread and put up some pics of your car!
you're overwriting software, so the gains won't be cumulative.
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      12-02-2012, 01:11 AM   #12
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Quote:
Originally Posted by mb135is View Post
I'm curious how this will work out. Will the gains be on top of the PPK gains, or will it nullify the PPK? I contacted Dinan and they said they have nothing yet, and they didn't mention even working on it, so I don't know if something's coming. If the product is the same, then we'd be paying the same $ for less gain since we're starting at 320 hp. Hopefully it'll be a different product altogether.

Oh, and get into the 135is thread and put up some pics of your car!
I called them, in the works, probably about 6-9 months out.

Got one flic up but waiting for my M3 hood prop to install my iCarbon hood.

Quote:
Originally Posted by jsmonet View Post
you're overwriting software, so the gains won't be cumulative.
^^ I have heard while talking with others this will be the case, however with the bigger fan/intercooler the cooler upgrade may not be required for S2?
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      12-02-2012, 03:00 AM   #13
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as long as your car came with an oil cooler (all n55's did), your car rolled off the showroom floor ready for s2.

for s3 you need a better IC and oil cooler.
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      12-03-2012, 12:46 AM   #14
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Quote:
^^ I have heard while talking with others this will be the case, however with the bigger fan/intercooler the cooler upgrade may not be required for S2?
This is waht they said to me also - I called Dinan about that while waiting for the tune to first come out last year, and saw a great holiday special ont he PPK just software for like 450 or 500 or something, but was told it would be overwritten.

Didnt with the PPK btw.

Love the dinan to this day still. I upgraded the FMIC and looking foor a nice oil cooler so i can go to S3 Dinan eventually.
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      12-04-2012, 04:09 AM   #15
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I heard that doing Dinan S2 will make BMW rejects the extended warranty if in case we want to buy one. Is it true? Any of you know how Dinan works with the BMW warranry itself? Whether the original 4 year warranty or the extended one. I plan to do it but don't want to have hard time or dealing with warranty issue. Thanks
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      12-05-2012, 10:08 PM   #16
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dinan warranty is only for 4year 50k factory style warranty... if you have dinan tune you will not be elegible for an 6yr 100k (extended warranty).
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      12-06-2012, 02:32 AM   #17
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Quote:
Originally Posted by bxsinster
dinan warranty is only for 4year 50k factory style warranty... if you have dinan tune you will not be elegible for an 6yr 100k (extended warranty).
Any reason why cars that has Dinan S2 doesn't eligible for it? I do really want it but I plan to keep it for more than the original warranty. Thanks
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      12-06-2012, 02:53 AM   #18
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Quote:
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Any reason why cars that has Dinan S2 doesn't eligible for it? I do really want it but I plan to keep it for more than the original warranty. Thanks
pushing 5lb of extra boost (60% more than stock) gives them some pause, haha

If you're really worried, don't do it. nothing buys peace of mind quite like that.

it's pretty happy at s3, i'll say that much.
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      12-14-2012, 03:52 PM   #19
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Plus Dinan supposedly sells warranty extensions - fwiw.
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      12-19-2012, 09:37 PM   #20
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Quote:
Originally Posted by mb135is View Post
I'm curious how this will work out. Will the gains be on top of the PPK gains, or will it nullify the PPK? I contacted Dinan and they said they have nothing yet, and they didn't mention even working on it, so I don't know if something's coming. If the product is the same, then we'd be paying the same $ for less gain since we're starting at 320 hp. Hopefully it'll be a different product altogether.

Oh, and get into the 135is thread and put up some pics of your car!
I called Dinan today and the Indiana rep said S2 is good to go on 2013 1er. I spoke to the same rep who helped my dealer put it on my 2010 335i (short story...dealer had problems installing S2 on my 335i...said it wouldn't work...the Dinan rep stepped in and got it working fine).
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Last edited by tyler9595; 12-19-2012 at 09:37 PM. Reason: stupid typo
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