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Upgrade 20i to 28i performance
- Thread starter GoSteve
- Start date
Twin Turbo
Active member
You can probably get near - but depends how far you want to go:-
Stage 1: Remap/Race Chips/JB4
Stage 2: Remap/JB4 + Remove Cats
Stage 1 will probably give you around 40/45 BHP and 70 lbs torque
Stage 2 Will probably give you 50+ bhp
Stage 1: Remap/Race Chips/JB4
Stage 2: Remap/JB4 + Remove Cats
Stage 1 will probably give you around 40/45 BHP and 70 lbs torque
Stage 2 Will probably give you 50+ bhp
Twin Turbo
Active member
stuartinzg
Active member
If they share the same internals, why would a remap only take you to 28i levels? A 28i can be boosted to over 300.
Something doesn't add up :?
Something doesn't add up :?
stuartinzg said:If they share the same internals, why would a remap only take you to 28i levels? A 28i can be boosted to over 300.
Something doesn't add up :?
I don't think there's a proper remap available for that engine, it's just a piggyback unit.
It's quite possible both engines are capable of outputting the same power but since piggyback tuning is limited to fudging a few sensor readings then for the time being I doubt the 20i will get close to 28i figures. There's only so much leeway the stock ECU allows before throwing codes when you start increasing the boost pressure and fuelling. The JB4 is quite good at avoiding them but each generation BMW seem to add a few more checks to catch out piggybacks.
Once the ECU is cracked on that engine then you might find the 20i becomes a complete bargain. Similar to how the old 3.0 E9x 325d could be tuned to the same levels as the 330d. I wouldn't hold out much hope for a full crack though, people won't be spending much R&D money on the platform since it has limited appeal to modders.
stuartinzg said:If they share the same internals, why would a remap only take you to 28i levels? A 28i can be boosted to over 300.
Something doesn't add up :?
That is a very valid point!
I'm only going by what Evolve Automotive told me last Wednesday whilst I was in their workshop but they were confident (and proud to tell me at length) they had recently done a 20i and with a simple ECU map had it running stock 28i power. They said the owner was over the moon - no chance he is on the forum?? If you are step up!
stuartinzg
Active member
R.E92 said:stuartinzg said:If they share the same internals, why would a remap only take you to 28i levels? A 28i can be boosted to over 300.
Something doesn't add up :?
I don't think there's a proper remap available for that engine, it's just a piggyback unit.
It's quite possible both engines are capable of outputting the same power but since piggyback tuning is limited to fudging a few sensor readings then for the time being I doubt the 20i will get close to 28i figures. There's only so much leeway the stock ECU allows before throwing codes when you start increasing the boost pressure and fuelling. The JB4 is quite good at avoiding them but each generation BMW seem to add a few more checks to catch out piggybacks.
Once the ECU is cracked on that engine then you might find the 20i becomes a complete bargain. Similar to how the old 3.0 E9x 325d could be tuned to the same levels as the 330d. I wouldn't hold out much hope for a full crack though, people won't be spending much R&D money on the platform since it has limited appeal to modders.
Correct me if I'm wrong, then why can't you plugin a 28i ECU and reprogram it? Or am I being simples?
stuartinzg said:R.E92 said:stuartinzg said:If they share the same internals, why would a remap only take you to 28i levels? A 28i can be boosted to over 300.
Something doesn't add up :?
I don't think there's a proper remap available for that engine, it's just a piggyback unit.
It's quite possible both engines are capable of outputting the same power but since piggyback tuning is limited to fudging a few sensor readings then for the time being I doubt the 20i will get close to 28i figures. There's only so much leeway the stock ECU allows before throwing codes when you start increasing the boost pressure and fuelling. The JB4 is quite good at avoiding them but each generation BMW seem to add a few more checks to catch out piggybacks.
Once the ECU is cracked on that engine then you might find the 20i becomes a complete bargain. Similar to how the old 3.0 E9x 325d could be tuned to the same levels as the 330d. I wouldn't hold out much hope for a full crack though, people won't be spending much R&D money on the platform since it has limited appeal to modders.
Correct me if I'm wrong, then why can't you plugin a 28i ECU and reprogram it? Or am I being simples?
ECUs have checks. The VIN number in the ECU will likely be interrogated in some manner to determine if the ECU type matches the engine. The VIN is also stored in two other modules in addition to the DME. The CAS and another (KOMBI?). They must match before the car can be started.
There will be a few other checks between modules. If you know the location of the checkbits then you could in theory just flash the 28i file on the 20i DME.
The problem there is you need to have write access to the DME. I think companies only have partial write access.
Twin Turbo
Active member
Interesting graph - as it looks very similar to mine that recorded an 308Bhp
stuartinzg
Active member
R.E92 said:stuartinzg said:R.E92 said:I don't think there's a proper remap available for that engine, it's just a piggyback unit.
It's quite possible both engines are capable of outputting the same power but since piggyback tuning is limited to fudging a few sensor readings then for the time being I doubt the 20i will get close to 28i figures. There's only so much leeway the stock ECU allows before throwing codes when you start increasing the boost pressure and fuelling. The JB4 is quite good at avoiding them but each generation BMW seem to add a few more checks to catch out piggybacks.
Once the ECU is cracked on that engine then you might find the 20i becomes a complete bargain. Similar to how the old 3.0 E9x 325d could be tuned to the same levels as the 330d. I wouldn't hold out much hope for a full crack though, people won't be spending much R&D money on the platform since it has limited appeal to modders.
Correct me if I'm wrong, then why can't you plugin a 28i ECU and reprogram it? Or am I being simples?
ECUs have checks. The VIN number in the ECU will likely be interrogated in some manner to determine if the ECU type matches the engine. The VIN is also stored in two other modules in addition to the DME. The CAS and another (KOMBI?). They must match before the car can be started.
There will be a few other checks between modules. If you know the location of the checkbits then you could in theory just flash the 28i file on the 20i DME.
The problem there is you need to have write access to the DME. I think companies only have partial write access.
I guess the best option for those who are determined is an aftermarket ECU like Syvecs/MegaSquirt? Probably a lot of work ...
Interesting: http://www.syvecs.co.uk/products/engine-management-system/bmw-e46-and-e92-m3-kits/
Check this https://www.youtube.com/watch?v=nTh0RVwB-gU
BMW 1 Series DSG supported
Really interesting, having the 2.0 with TMC is good, also an improvement in MPG, i suspect that i can get more out of it i.e. custom remap, but as said, I don't know how to go about this or where I would go. If the 2.8 is the same engine as the 2.0 then i suspect a 2.8 tuning box may work from TMC. I will call Darren at TMC tomorrow.
D
D
Twin Turbo
Active member
Your best place for conversations is looking in F forums - as there is more peeps with 320i's than Z4 20is - however I know with the JB4 the Z4 is an E type car - and not all solutions are work on F type and E type cars.
And the connectivity of the JB4 on an Z4 is different than F type
And the connectivity of the JB4 on an Z4 is different than F type
dvd112 said:Really interesting, having the 2.0 with TMC is good, also an improvement in MPG, i suspect that i can get more out of it i.e. custom remap, but as said, I don't know how to go about this or where I would go. If the 2.8 is the same engine as the 2.0 then i suspect a 2.8 tuning box may work from TMC. I will call Darren at TMC tomorrow.
D
Can you let us know how you get on, I am interested in doing the same to my car
Hi all.
I bought a TMC unit for my partners' 2013 20i, and the customer service has been first class. Unfortunately it is bringing the management light on at the moment, but Daron from TMC suspects the cam sensor isn't seated correctly. I'll have another go at it tomorrow and see if I can get it working. Seems a great product otherwise.
I bought a TMC unit for my partners' 2013 20i, and the customer service has been first class. Unfortunately it is bringing the management light on at the moment, but Daron from TMC suspects the cam sensor isn't seated correctly. I'll have another go at it tomorrow and see if I can get it working. Seems a great product otherwise.