View Full Version : 525i Engine Upgrade


Tablet
03-13-2007, 01:15 PM
I have a 1995 525i with an M50 engine. It is very slow. I would like to upgrade to a larger engine and eventually add a supercharger and turbocharger. What are the engine upgrade options for the E34?

autophile
03-18-2007, 04:57 PM
This would get a better response in the e34 forum. This is the area for "non-BMW engine swaps".

But since you asked:

I've seen people very happy with M30 swaps into 525s. Search for threads started by MrProject. He put an M30 and a 5-sp manual in a 525 Touring and loves it.

There are a few people considering an LS1 swap into an E34. Obviously not a direct bolt-in conversion, but obtainable if you have the budget for it. Plan on $12k to $18k if you have a shop do it; and plan on a parts budget of $5k to $9k depending on your fabrication and mechanical skills if you DIY.

martyanderson10
03-22-2007, 09:32 PM
I have a 1995 525i with an M50 engine. It is very slow. I would like to upgrade to a larger engine and eventually add a supercharger and turbocharger. What are the engine upgrade options for the E34?
Is it an automatic? I have a 5 speed 95 525 and it is reasonably quick. A good running 525 should not be "very slow"

Gunslinger
03-22-2007, 10:19 PM
I have a 1995 525i with an M50 engine. It is very slow. I would like to upgrade to a larger engine and eventually add a supercharger and turbocharger. What are the engine upgrade options for the E34?

The most powerful direct swap would be an s50.

As an alternative, you might consider FI.

Ahheck01
03-23-2007, 01:56 AM
LS1. don't look back.

-Evan

BavarianCrzd
03-27-2007, 09:36 AM
The most powerful direct swap would be an s50.

As an alternative, you might consider FI.
+1, I like the direct swap idea

propellerskies
03-29-2007, 10:50 PM
illl be doing the same ... to an s50 soon.. but i have questions about the tranny, i have an auto, can i go 5spd as long as i have the comp tranny.. im new at this stuff, so please any help.. im not rich, but i think i can pull off buying an s50.. what are the power potentials in a car the size of an e34? i really just want to beat all these mustang driving hillbillies where i live ( no offense to the car itself)

adriver
04-04-2007, 02:34 PM
This would get a better response in the e34 forum. This is the area for "non-BMW engine swaps".

But since you asked:

I've seen people very happy with M30 swaps into 525s. Search for threads started by MrProject. He put an M30 and a 5-sp manual in a 525 Touring and loves it.

There are a few people considering an LS1 swap into an E34. Obviously not a direct bolt-in conversion, but obtainable if you have the budget for it. Plan on $12k to $18k if you have a shop do it; and plan on a parts budget of $5k to $9k depending on your fabrication and mechanical skills if you DIY.

:shifty its quite a bit less than that.

autophile
04-10-2007, 12:15 AM
:shifty its quite a bit less than that.

I hope you're right.

The prices of LS1s with T56 trans seem to be falling, so the major components are getting cheaper.

But I have yet to see someone post receipts or even anything close to a complete parts list that is less than $5k.

If you've done it, please enlighten the rest of us.