[camilowsky]

Hi Everyone, I decided to try to get an ECU tune for my M340i. I am thinking about Carbahn or Dinan +. Both come with a warranty. Currently Carbahn is on sale for $1,200, and Dinan is $1,100. Does anyone have any opinion over performance and quality? Can't decided between these two.

[Dinan_Engineering]

Originally Posted by camilowsky

Hi Everyone, I decided to try to get an ECU tune for my M340i. I am thinking about Carbahn or Dinan +. Both come with a warranty. Currently Carbahn is on sale for $1,200, and Dinan is $1,100. Does anyone have any opinion over performance and quality? Can't decided between these two.

Dinan gets my vote. Totally not biased or anything.

[Rocket455]

The specs and price are really similar, not to mention Steve Dinan's connection to both. I have the Carbahn flash which I got specifically because of the warranty and was installed by the originating BMW dealer; I love it. I would be very surprised if there was any noticeable difference between the two.

[joes_m340]

Originally Posted by Dinan_Engineering

Dinan gets my vote. Totally not biased or anything.

Warranty only for the 91 map?

[iiSonnyii]

Originally Posted by camilowsky

Hi Everyone, I decided to try to get an ECU tune for my M340i. I am thinking about Carbahn or Dinan +. Both come with a warranty. Currently Carbahn is on sale for $1,200, and Dinan is $1,100. Does anyone have any opinion over performance and quality? Can't decided between these two.

Keep in mind the tune is only for the 2020 models with DME before 6/20.

[camilowsky]

I just don't understand one thing. Carbahn says 471 flywheel HP and 509 LB/FT flyewheet torque. When looking at their dyno graph it says 391.22 HP and 422 torque. Stock values given hp/tq - 344/380.

On Dinan website crank numbers are 410HP and 407 LB/FT which is consistent with at crank dyno graph, stock 353/347. They also show at wheel HP that show 361 HP and 380 LB/FT, stock 311/317.

How should I compare? I am new to this.

[SpiveyCJ]

I also have the Carbahn Tune on a 2020 and love it. At the time of purchase Dinan only had piggybacks for the M340

[joes_m340]

Originally Posted by Dinan_Engineering

Dinan gets my vote. Totally not biased or anything.

I'm confused, the warranty is only for the 91 map, yet your fuel guide says "You may use a higher octane than prescribed by the tune. For example, running 93 Octane on a 91 Octane program is fine, and in some cases may offer a bump in performance."

If i get the Dinan +, 91 map, and run 93 does that affect the warranty?

[Dinan_Engineering]

Originally Posted by joes_m340

I'm confused, the warranty is only for the 91 map, yet your fuel guide says "You may use a higher octane than prescribed by the tune. For example, running 93 Octane on a 91 Octane program is fine, and in some cases may offer a bump in performance."

If i get the Dinan +, 91 map, and run 93 does that affect the warranty?

Correct. The matching warranty variant (Dinan+) is a single octane calibration. You can run higher grade gas if desired (although not E85) and it would not have a negative affect on the vehicle with that base tune... in most cases you will get a bit more power like the fuel guide states. It would also not affect the warranty. Going the opposite way is where you have issues. An E85 tune as an example is commanding much more power/energy then a lower octane is going to be able to supply which will lead to knock conditions and ultimately premature engine failure. We can't guarantee folks won't do harm to their vehicle which we would then be on the hook for hence why the warrantied tune is limited to the 91 baseline.

[joes_m340]

Originally Posted by Dinan_Engineering

Correct. The matching warranty variant (Dinan+) is a single octane calibration. You can run higher grade gas if desired (although not E85) and it would not have a negative affect on the vehicle with that base tune... in most cases you will get a bit more power like the fuel guide states. It would also not affect the warranty. Going the opposite way is where you have issues. An E85 tune as an example is commanding much more power/energy then a lower octane is going to be able to supply which will lead to knock conditions and ultimately premature engine failure. We can't guarantee folks won't do harm to their vehicle which we would then be on the hook for hence why the warrantied tune is limited to the 91 baseline.

Thanks!!

[camilowsky]

Does anyone know how to compare Dinan vs Carbahn number wise? Which gives the most hp/tq?

[TruthOne]

I'd go Dinan but I'm in the Bay Area and biased . Please somebody unlock the 2021's'nn

[G-Mann]

Is the Dinan tune certified for the M440i? If not is there an estimated release date?

[Dinan_Engineering]

Originally Posted by G-Mann

Is the Dinan tune certified for the M440i? If not is there an estimated release date?

M440i is a '21 MY so therefore has the new DME that has yet to be cracked. Being worked on like it is with everyone but couldn't even begin to estimate when that may occur.

[camilowsky]

So I just found out that real Dinan + numbers are 470 flywheel HP and 509 LB/FT torque.. so I guess choice is clear then. Plus currently if you tune through Carbahn you lose remote start... they are just working on patch for it.

[RTPenland]

Originally Posted by camilowsky

So I just found out that real Dinan + numbers are 470 flywheel HP and 509 LB/FT torque.. so I guess choice is clear then. Plus currently if you tune through Carbahn you lose remote start... they are just working on patch for it.

What multiplier percentage is Dinan using to establish flywheel HP and LB/FT? Meaning they obtained some WHP LB/FT numbers and then estimated flywheel based on a percentage multiplier. They (Dinan/Holley) are conservative by nature so I imagine it's maybe 9% or so??

[RTPenland]

Originally Posted by TruthOne

I'd go Dinan but I'm in the Bay Area and biased . Please somebody unlock the 2021's'nn

Then you should go Carbahn - Dinan now is just a cog in the wheel for the Holley corporation and is based in Alabama - Steve Dinan is in NorCal. Here you go...I think you can find Dinan in the Holley conglomerate somewhere

[Dinan_Engineering]

Originally Posted by RTPenland

What multiplier percentage is Dinan using to establish flywheel HP and LB/FT? Meaning they obtained some WHP LB/FT numbers and then estimated flywheel based on a percentage multiplier. They (Dinan/Holley) are conservative by nature so I imagine it's maybe 9% or so??

Generally speaking if you want a flat percentage I would use ~12% on a RWD vehicle. The formula we use is a bit more involved then that and scales but for simplicities sake -- 12%. Both wheel and crank charts can be found on our website so you can compare directly if desired.

Originally Posted by RTPenland

Then you should go Carbahn - Dinan now is just a cog in the wheel for the Holley corporation and is based in Alabama - Steve Dinan is in NorCal. Here you go...I think you can find Dinan in the Holley conglomerate somewhere

Yes we are now based in AL and share a campus with APR making our location the Euro HQ for the group but we were in the bay area for 38 years (til 2018) so our ties there are still pretty fresh. And yes, we are one of many brands in the Holley portfolio that is seemingly growing everyday (AEM was added late last week). As with everything, that has its upsides and downsides but I would say there is more positive then negative. Greater buying power, more resources, synergies (yeah, I used it) with other sister companies, etc. The only perpetual "negative" is a strict adherence to emissions laws given the sheer size of the group and the target that that presents. That has been a pain for some brands but not nearly as much of a problem for Dinan seeing as that has been part of our DNA already for quite some time.

[Top Gon]

So I was looking at the dyno graphs of both the Carbahn and Dinan tunes for their 91oct (That's most likely what we'd be running most of the time).

It looks like the Carbahn tune might possibly edge out Dinan in terms of gains? I know the numbers don't match up because of different dynos/conditions/etc, but just looking at the delta, it looks like Dinan is about 20hp over stock at peak, about +40hp in the mid-range. Carbahn is about +50hp over stock and also about +40hp in the mid-range.

Source:

https://www.dinancars.com/products/s.../D900-B58-G-S1

https://carbahnautoworks.com/product...i-g14-g15-g16/


tell me if my finding are correct.

[RTPenland]

Originally Posted by 4DrSpra

tell me if my finding are correct.

Okay so you made me look and what I see is with the Dinan stage 1 91 flash and/or the Dinan + (also on 91 with warranty option) it's actually a 22HP (or about 5%) gain so a bit more than what you thought. I base this on the link you shared to the Dinan site (here's a screen shot) info. Carbauhn is a little bit more of a challenge so I'll look at that tomorrow. Like you, if I'm wrong with what I am seeing, please anyone let me know. I think for a warrantied optioned tune this is strong at 22HP

ps- it looks like if you go with 93 (I'm not sure if this is a warranty option in that if falls under the Stage 1 but not the Dinan+) you can pick up 32 HP which is even better - so with people who have access to higher octane those numbers are more attractive

[Rocket455]

Originally Posted by camilowsky

if you tune through Carbahn you lose remote start... they are just working on patch for it.

Sigh, yup. I discovered that almost immediately after picking up my car after the install. Still no solution at the moment.

[RTPenland]

Originally Posted by camilowsky

So I just found out that real Dinan + numbers are 470 flywheel HP and 509 LB/FT torque.. so I guess choice is clear then. Plus currently if you tune through Carbahn you lose remote start... they are just working on patch for it.

Has it been confirmed that remote start is retained after Dinan flash? If so that's cool