[Hobbs64]

Pete,

What would be the cost to develop a set of cams?

[justpete]

Originally Posted by Hobbs64

Pete,

What would be the cost to develop a set of cams?

Sorry, I don't understand the question. I don't design or build cams.

[Hobbs64]

Who did you have regrind your cams?

[justpete]

Originally Posted by Hobbs64

Who did you have regrind your cams?

Riot Racing

[JuniorB]

Hi,I had asked bms awhile back about the same topic. Many people often questioned if blocks and heads could be swapped . The major clearance issue would be piston height,unless you went with a n52,n54 rods,with n52 head. It's a lot of work when we don't even know the capabilities of the n52 yet. There is a turbo car pushing 400+ to the wheels,and nitrous motors,were touching levels here. I wouldn't doubt if 500 rwhp was in range and that's perfect for a street car

[Hobbs64]

Both block have the same deck height. Both blocks have the same length connecting rod. N52 pistons are taller. You would need a custom piston. The pistons for the CP N54 are custom anyway. I don't know why there are so many nay-Sayers here...lol. It is a much stronger bottom end.

[Hobbs64]

One question I have for the guys that know the ecu's and software, Can the ecu on the N52 run a N54? I might just swap in a complete N54.

[Hobbs64]

Interesting side note, someone mentioned that the S54 wouldn't be a great swap in the E90 due to weight. I'm not convinced. The E46 M3 weighs roughly 3160lbs. The 328xi weighs 3380. The E90 would be about 3500 with the S54. With a little weight savings that number would come down. I addition, the S54 is capable of 450lbs. without power adders. It would move the E90 just fine.

[Dan Bilzerian]

Originally Posted by Hobbs64

One question I have for the guys that know the ecu's and software, Can the ecu on the N52 run a N54? I might just swap in a complete N54.

Why wouldn't you just use a n54 dme then?

[hassmaschine]

Originally Posted by Hobbs64

One question I have for the guys that know the ecu's and software, Can the ecu on the N52 run a N54? I might just swap in a complete N54.

No. N54 is direct injection. The software is actually there, but not the injector driving hardware.

[Terraphantm]

Originally Posted by Hobbs64

Interesting side note, someone mentioned that the S54 wouldn't be a great swap in the E90 due to weight. I'm not convinced. The E46 M3 weighs roughly 3160lbs. The 328xi weighs 3380. The E90 would be about 3500 with the S54. With a little weight savings that number would come down. I addition, the S54 is capable of 450lbs. without power adders. It would move the E90 just fine.

Ha, I wish E45 M3 was 3160 lbs. Most weigh in around 3400-3500 lbs.

[JuniorB]

If you blocked all passages for the turbos,I don't see why not the n52 couldn't run it,as long as your using all n52 accessories. I also have this idea,and a n54 block,all the sensors are the same as the n52. I've dove some research on this,the s54 unless it's a manual,won't run all amenities. It was also said you can run the 07 335 ecu to run the n54,being it was ran earlier than 2008.

[Hobbs64]

Dan,

To answer your question, to keep things simple. I'm not trying to replace everything! The N52 head is the best of the lot between the N52, 54 and 55. I believe the N54 block id the strongest, most buildable platform. This combination with cams (maybe some stroke), intake and headers should be worth north of 400 hp easily. I know there are guys that want more. I have some really fast cars. What I'm looking for in my E90 is just a good nicely appointed quick four door. I can get that at 420 HP, whether naturally aspirated or not.

[Hobbs64]

Hass,

Do you know if the N52 ecu can run the N54 turbos? Is a straight motor swap possible while retaining the N52 wiring and ecu? It has to be possible! Don is running a GT35R??

[Hobbs64]

If anyone knows of a decent N54 bottom end for sale, I'm in the market!

[hassmaschine]

Originally Posted by Hobbs64

Hass,

Do you know if the N52 ecu can run the N54 turbos? Is a straight motor swap possible while retaining the N52 wiring and ecu? It has to be possible! Don is running a GT35R??

No, as I said, the N54 is direct injection. If you want to use an N54, you need the N54 DME, plus a matching CAS and key.

It is possible (most likely) to run an N52 with a turbo and an N54 bottom end like you originally planned, but the N52 is port injection not direct injection.

[hassmaschine]

Originally Posted by JuniorB

If you blocked all passages for the turbos,I don't see why not the n52 couldn't run it,as long as your using all n52 accessories. I also have this idea,and a n54 block,all the sensors are the same as the n52. I've dove some research on this,the s54 unless it's a manual,won't run all amenities. It was also said you can run the 07 335 ecu to run the n54,being it was ran earlier than 2008.

No, it cannot. Block passages for turbos? What are you even talking about? You mean like the uhm, exhaust manifold?

the N54 is direct injection. The fuel is injected into the cylinder. The N52 is port injection. There is no way to run an N54 on an N52 computer. Even if you could, you would have to do so much reprogramming of the computer to make it run right..

[Hobbs64]

No, as I said, the N54 is direct injection. If you want to use an N54, you need the N54 DME, plus a matching CAS and key.

It is possible (most likely) to run an N52 with a turbo and an N54 bottom end like you originally planned, but the N52 is port injection not direct injection.

Hass,

Thanks for the clarification. I figured that would be the case.

[Hobbs64]

Sorry Hass, the post above was meant to include your quote. I'm better in a garage than on a forum thread...lol.

[tlow98]

Originally Posted by Hobbs64

Dan,

To answer your question, to keep things simple. I'm not trying to replace everything! The N52 head is the best of the lot between the N52, 54 and 55. I believe the N54 block id the strongest, most buildable platform. This combination with cams (maybe some stroke), intake and headers should be worth north of 400 hp easily. I know there are guys that want more. I have some really fast cars. What I'm looking for in my E90 is just a good nicely appointed quick four door. I can get that at 420 HP, whether naturally aspirated or not.

Yeah, then you just want to put in the n54 (as a whole unit) with n54 Ecu,cas and key modules. Easily accomplish 420 (wheel or flywheel) with minimal mods and be pretty darn reliable.

Not sure why you wanna mess with swapping the head at all given what you want 420hp. Or, there is that v8 that makes exactly that in euro numbers... the n54 will be a much cheaper swap tho

For the knowledge base of the forum it'd be great if you did the n52/54 combo but I just don't see why you would other than curiousity?

[JuniorB]

No,no,I meant block the oiling passages ans water passages. It's a block with provisions for lines for oil and water,unless you wanted to make ports to run a oil cooler,there the same block,I have one and looked all around it. It sensors are interchangeable with the n52. I'm pulling the head this weak. Bpc may be right,it may be as strong or stronger than the n54. It's a lot of work to do this,unless you have to much time or money.

[Matte90330]

If I was to do this swap by getting a totaled 335 and swapping over everything would the vin encoded on those modules from the donor car have to be changed to my vin for things like emissions?