[stmilosh]

Originally Posted by _TB_

I believe this is a typo in the spec sheet, if you look at the epc, then they have the same pistons, head and conrods.

I also have the A engine - and I'm looking for people that are running high power. Where are they? I do have a lot of questions for the ones that are actually running high power on the A engine.

It's not a typo, all pre LCI as well as LCI till MY2024 330e xDrive (Sedan and Touring both) have 10.2 compression ratio. And all B48 engines have identical stroke and bore so that tells nothing about compression ratio.

[autko78]

Originally Posted by stmilosh

It's not a typo, all pre LCI as well as LCI till MY2024 330e xDrive (Sedan and Touring both) have 10.2 compression ratio. And all B48 engines have identical stroke and bore so that tells nothing about compression ratio.

Yes you right. I have 330e xdrive touring 2021 with engine B48B20A and this engine has compresion 10,2 same 330i. 330e without xdrive has also engine B48B20A but comprasion 11 same 320i. This information is 100% sure. BMW catalog part number of engine 320e and 330e is the same 5A078D7 (compresion 11) and 330eX is another 5A078C8 (compresion 10,2). The both engines are B48B20A but compresion is diffrent!

[330eJL]

https://www.facebook.com/share/p/1DPgeMofQK/?

https://www.facebook.com/share/r/19m...ibextid=WC7FNe

This car has the A engine pushing over 600whp. Pretty much a big turbo set-up with stock internals. My tuner know these guys and they're legit.

[_TB_]

Originally Posted by stmilosh

And all B48 engines have identical stroke and bore so that tells nothing about compression ratio.

You missed the last bit in my post - pistons, conrods AND head..

[_TB_]

Originally Posted by 330eJL

This car has the A engine pushing over 600whp. Pretty much a big turbo set-up with stock internals. My tuner know these guys and they're legit.

So, if this is possible - then why can't any tuners get more than ~250Bhp from the A engine? Is it a limiter in the ecu, that is not present on the 330 (if it has not been identified, then they cannot change it) or is it because of too much ignition correction when upping the boost? Or does the A version have different cam-timing mapping, hindering the airflow into the head?

The turbo is the same - so it is not an airflow limitation on that side, the exhaust is also the same, so no limiter here either..

[330eJL]

Originally Posted by _TB_

So, if this is possible - then why can't any tuners get more than ~250Bhp from the A engine? Is it a limiter in the ecu, that is not present on the 330 (if it has not been identified, then they cannot change it) or is it because of too much ignition correction when upping the boost? Or does the A version have different cam-timing mapping, hindering the airflow into the head?

The turbo is the same - so it is not an airflow limitation on that side, the exhaust is also the same, so no limiter here either..

I do not know the exact reasons but apparently there are some restrictions with load when it comes to these hybrids.

[_TB_]

Originally Posted by 330eJL

I do not know the exact reasons but apparently there are some restrictions with load when it comes to these hybrids.

But I'm trying to hunt down excaylt _what_ the limiter is on the A engine. The B engine gets loads of power and torque - but the A version is severely limited..

Fro mthe video above it is obvious that BIG power _can_ be achieved from the A engine.. I'm just wondering exactly _what_ is the limiter on them.

[_TB_]

So; I dug somewhat deeper. The 330e A has a different cylinder head from the 330i. The 330e has integral exhaust manifold in the head, where the 330i has a separate exhaust manifold. (I have not been able to find out if the 330e B also uses the 330i head/turbo, but I assume so).

This is a severly poorer design regarding flow - so that might be the reason why they do not get the same power - more than the higher compression..

[cola.p]

My car is G30 530e LCI which is B48 A Engine + electric motor. My bootmod3 with custom tune and E30 fuel is 452whp. I think only engine itself should be around 330whp. I drove it hard and many track days this year. Everything still fine. My tuner is same guy as 330eJL. Please check dyno graph.

[_TB_]

Originally Posted by cola.p

My car is G30 530e LCI which is B48 A Engine + electric motor. My bootmod3 with custom tune and E30 fuel is 452whp. I think only engine itself should be around 330whp. I drove it hard and many track days this year. Everything still fine. My tuner is same guy as 330eJL. Please check dyno graph.

That is cool, what mods do you have? Downpipe? Is it Femto unlocked?

Can you grab a picture of the turbo and exhaust manifold for me?

[cola.p]

Originally Posted by _TB_

That is cool, what mods do you have? Downpipe? Is it Femto unlocked?

Can you grab a picture of the turbo and exhaust manifold for me?

Engine mod
- Femto Unlock
- Bootmod3 custom tune
- High Flow Downpipe (200 cell)
- Exhaust
- BMC Air Filter
- E30 Fuel

I’ll take photos of (stock) turbo Nd exhaust manifold later.

[cola.p]

Originally Posted by _TB_

That is cool, what mods do you have? Downpipe? Is it Femto unlocked?

Can you grab a picture of the turbo and exhaust manifold for me?

Please check the attach. Best I can do

[_TB_]

Thanks exactly what I was after - you also have the two port turbo. (y)

I'm still trying to grasp why tuners do not get the same power from that as from the B series with the 4 port head.

400BHp from the 330e with the A engine should absolutely be possible, with E5 or E10 fuel. I'm wondering if there is a limiter in the ecu that tuners are not fully aware of - and thus holding the power back.

You car proves that it is possible..

Do you have a boost curve from it?

[cola.p]

Originally Posted by _TB_

Thanks exactly what I was after - you also have the two port turbo. (y)

I'm still trying to grasp why tuners do not get the same power from that as from the B series with the 4 port head.

400BHp from the 330e with the A engine should absolutely be possible, with E5 or E10 fuel. I'm wondering if there is a limiter in the ecu that tuners are not fully aware of - and thus holding the power back.

You car proves that it is possible..

Do you have a boost curve from it?

Please check the attach for 3-4-5th pull graph. Boost is around 21-22psi.

What are differences between 2 port turbo and 4 port turbo?

[330eJL]

Originally Posted by cola.p

My car is G30 530e LCI which is B48 A Engine + electric motor. My bootmod3 with custom tune and E30 fuel is 452whp. I think only engine itself should be around 330whp. I drove it hard and many track days this year. Everything still fine. My tuner is same guy as 330eJL. Please check dyno graph.

You car is 💪🏼🔥and I can't thank you enough for hooking me up!! 🙏🏼

[330eJL]

Originally Posted by _TB_

Thanks exactly what I was after - you also have the two port turbo. (y)

I'm still trying to grasp why tuners do not get the same power from that as from the B series with the 4 port head.

400BHp from the 330e with the A engine should absolutely be possible, with E5 or E10 fuel. I'm wondering if there is a limiter in the ecu that tuners are not fully aware of - and thus holding the power back.

You car proves that it is possible..

Do you have a boost curve from it?

I think there is definitely some kind of limiter in the ecu that only a very few tuners currently know the solution for.

[_TB_]

Originally Posted by 330eJL

I think there is definitely some kind of limiter in the ecu that only a very few tuners currently know the solution for.

That is also what I expect.

Comapring the bin for the B engine and the A engine can help us identify the limiter.. If only I could find some ori's

[_TB_]

Originally Posted by cola.p

Please check the attach for 3-4-5th pull graph. Boost is around 21-22psi.

What are differences between 2 port turbo and 4 port turbo?

The 2 port have the exhaust manifold in the head - so it is watercooled and the turbo attach directly to the head. The 4 port have a normal castiron exhaus manifold to the turbo. There might be some flow differences between those two - but I'm certain that this is not the limiting factor.

I'm convinced there is a limiter in the ecu that most tuners have not found.