[Thatslow.b48]

Can you engine swap a BMW G20 330i with a B58 engine?

[vedant]

If you want the B58 it would be far more practical to sell your 330i and buy an M340i.

[g20beam]

Originally Posted by Thatslow.b48

Can you engine swap a BMW G20 330i with a B58 engine?

Why not just rebuild the B48 and add a bigger turbo to push for 450+whp? The cost of you swapping an entire engine in would be equivalent to doing just this..

[billnchristy]

Get an m35i engine. I'm sure it'd still be a nightmare but less of a nightmare than a b58 swap.

[turnsignalslol]

Originally Posted by Thatslow.b48

Can you engine swap a BMW G20 330i with a B58 engine?

Lmao I was considering this then realized how stupid it is. Engine swaps are never going to be as cheap as you imagine them to be. Even if you try it yourself, you have a 90% chance of fucking something up and causing permanent damage.

TLR - Save your money and buy a M340i.

[VipinLJ]

Originally Posted by turnsignalslol

TLR - Save your money and buy a M340i.

+100. Don't even bother with an engine swap. Either build the B46 (not easy if you're in NA compared to if you were in Asia/Europe) or upgrade to an M340i.

[njfoses]

Originally Posted by VipinLJ

+100. Don't even bother with an engine swap. Either build the B46 (not easy if you're in NA compared to if you were in Asia/Europe) or upgrade to an M340i.

Why would building the B46 be harder than the B48 in other countries?

[pdxdbo]

Originally Posted by njfoses

Why would building the B46 be harder than the B48 in other countries?

There's a more developed B48 tuning community outside of the US, the M340 wasn't offered in all markets. A lot of the parts development and tuners are coming out of SE Asia and Australia. Navardi tuning being one of the tuning shops really pushing the B48 to it's limits. In the US market it often doesn't pencil out to manufacture performance parts for the "lesser" of the two available options. Look at US companies that offer parts for the B58 but not the B46, looking at you BMS and your plans to not develop a B46 intake (B46 is the US SULEV version of the B48).

[g20beam]

Originally Posted by pdxdbo

There's a more developed B48 tuning community outside of the US, the M340 wasn't offered in all markets. A lot of the parts development and tuners are coming out of SE Asia and Australia. Navardi tuning being one of the tuning shops really pushing the B48 to it's limits. In the US market it often doesn't pencil out to manufacture performance parts for the "lesser" of the two available options. Look at US companies that offer parts for the B58 but not the B46, looking at you BMS and your plans to not develop a B46 intake (B46 is the US SULEV version of the B48).

Can always order the parts needed.

However, the biggest issue is labour and mechanic knowledge limitations as achieving such a feat would require someone with exceedingly qualifying expertise which is not easy to find out here..

So many things can go wrong, so many factors that may come up even after the rebuild is done

There's just way too many electronics in these cars

[turnsignalslol]

Originally Posted by g20beam

Can always order the parts needed.

However, the biggest issue is labour and mechanic knowledge limitations as achieving such a feat would require someone with exceedingly qualifying expertise which is not easy to find out here..

So many things can go wrong, so many factors that may come up even after the rebuild is done

There's just way too many electronics in these cars

I think what he's trying to say is that there's a lot more parts made for the B48 engine (and not the B46 US/SULEV ver.) because there was more of an incentive to develop that platform (as the other poster said, the M340 wasn't offered in some markets). But yes, doing an engine swap or any modifications in these cars without someone who knows what they're doing is only going to end in trouble.

Plus, it's kinda sus when you have to jerry rig a performance part (i.e. a downpipe) onto your car, only asking for trouble at that point.

[VipinLJ]

Originally Posted by njfoses

Why would building the B46 be harder than the B48 in other countries?

Exactly what pdxdbo said! There are people in Asia and Russia pushing around 400whp and more in the G20 330is. I don't think there is one in NA yet!

[njfoses]

Originally Posted by VipinLJ

Exactly what pdxdbo said! There are people in Asia and Russia pushing around 400whp and more in the G20 330is. I don't think there is one in NA yet!

I wouldnt say that is more due to popularity than technical reasons. Doesn't make a whole lot of sense in the states to spend the thousands and thousands needed to properly build a 400whp B46 when you could just buy the M340i.

[Knifeedge2k1]

Originally Posted by njfoses

I wouldnt say that is more due to popularity than technical reasons. Doesn't make a whole lot of sense in the states to spend the thousands and thousands needed to properly build a 400whp B46 when you could just buy the M340i.

That's the point

At the end of the day, no one knows how because it's hard and no one bothers to here so no one has the knowhow is an inconsequential distinction to the individual.

[Lyle Hawk]

Originally Posted by vedant

If you want the B58 it would be far more practical to sell your 330i and buy an M340i.

What about when someone wants a fairly new G20 with a petrol six-cylinder and without x-drive?

Which is easier?
a) pulling B48 out of 330i (something you have to do for the chain change anyway) and putting B58 back instead
b) removing all the front axle drive stuff from M340iX, assuming the front suspension designed for AWD would still work reliably

[g20_wumbo]

Unfortunately we're long past the days where motor swaps were simple and less technology was involved. Cars have become a lot more complex with added computers, modules etc. it would make a lot more sense and cost you a lot less money to just upgrade to an M340i. It's not as easy as pulling one motor out and putting a bigger one in anymore.