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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-17-2013, 05:38 AM
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DinanBimmer DinanBimmer is offline
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M5 engine block swap...is it possible and what are the projected gains?

Came across this e39 M5 engine block on ebay: http://www.ebay.com/itm/BMW-E39-M5-E...B:FSEL:US:1123.
Is it possible to swap out a 4.4 block for the nearly 5 liter block of the M5? Just curious about how much work it would take to make something like this happen. If one could pull it off, how much power gain would be realized?
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  #2  
Old 04-17-2013, 06:25 AM
HTK12 HTK12 is offline
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There is no point in swapping just the block. You need to swap complete engine. I would just slap on a supercharger and call it a day. You'll end up with more hp than m5.
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  #3  
Old 04-17-2013, 06:56 AM
3star 3star is offline
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Your heads should bolt to it and you will make more power than you have now not m5 levels but you should see a power boost. The m had bigger displacement and higher'compression.

After looking at dyno graphs for the s62 though I suspect most of the difference in power is coming from the heads, the heads allow it to rev a few thousand rpms higher and thus net higher peak HP.

I suspect the reason BMW went to larger displacement and higher compression was to compensate for the loss in low rpm torque from the more aggressive cams and the individual throttles.

Your Max power output is most limited by how much your head can flow.

All that said should you do it I would be very warry about buying a block off eBay. Chances are that block spun some bearings or snapped a con rod and is a junk block they are trying to ditch on someone.

Also the shipping on something like that should be high like 300.00 because it will have to go truck freight and you'll pay more automatically if it has to go somewhere without a loading dock or with fork lifts.

Last edited by 3star; 04-17-2013 at 07:00 AM.
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Old 04-17-2013, 07:05 AM
3star 3star is offline
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And then when it arrives if it checks out you may run into minor fitment issues and you'll have to spend about another 1000 to put it all back together.

3-500 in parts 100. In machine shop time for the heads, the rest would be from labor cost and miscellaneous part costs
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  #5  
Old 04-17-2013, 08:55 AM
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DinanBimmer DinanBimmer is offline
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So that sounds like a whole bunch of time and money that I'd rather spend on a supercharger. I'm basically just trying to figure out what my best options are for engine tuning. One major issue that I need to sort out is throttle lag. When I'm cruising along at say 60 in 4 gear and I punch down on the accelerator the throttle response is not ideal. What can I do to fix this? I've heard of sprint booster, but don't entirely trust that it will make any difference.
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  #6  
Old 04-17-2013, 09:08 AM
edjack edjack is online now
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Your engine has a real cable attached to the accel pedal. You need to sort out the intake tract: idle control valve, vacuum leaks, poorly adjusted throttle cable. Any pending codes? Fuel pressure level? Age of O2 sensors, cats?

I get bodacious acceleration at that speed and gear. It's my fave technique for accelerating onto the freeway. In no time, I'm doing 80.
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  #7  
Old 04-17-2013, 09:45 AM
3star 3star is offline
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Os your car manual or auto.

If its auto the lag is caused by the torque converter, nothing u can do for that you maybe able to source an after market one with a higher stall speed but I doubt it

If its manual get a lightweight flywheel

Do you have a drive by wire throttle setup or a accelerator cable. If its drive by wire your screwed. If its a cable tighten the cable.

Last edited by 3star; 04-17-2013 at 09:46 AM.
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  #8  
Old 04-17-2013, 10:05 AM
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Quote:
Originally Posted by edjack View Post
Your engine has a real cable attached to the accel pedal. You need to sort out the intake tract: idle control valve, vacuum leaks, poorly adjusted throttle cable. Any pending codes? Fuel pressure level? Age of O2 sensors, cats?

I get bodacious acceleration at that speed and gear. It's my fave technique for accelerating onto the freeway. In no time, I'm doing 80.
Thanks for the ideas! My acceleration leaves something to be desired right now, but I'll have a look at all those components for any signs of failure. I need a code reader desperately too. I'm studying in Germany at the moment and have the car covered, so I hope to sort it out this summer when I return. I do the same thing when getting on the freeway. Drop it into 4th and punch it!
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  #9  
Old 04-17-2013, 10:07 AM
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DinanBimmer DinanBimmer is offline
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Quote:
Originally Posted by 3star View Post
Os your car manual or auto.

If its auto the lag is caused by the torque converter, nothing u can do for that you maybe able to source an after market one with a higher stall speed but I doubt it

If its manual get a lightweight flywheel

Do you have a drive by wire throttle setup or a accelerator cable. If its drive by wire your screwed. If its a cable tighten the cable.
I have a manual with a cable setup. I do want to upgrade my clutch, but i'm only doing that once the one I have in it starts slipping.
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  #10  
Old 04-17-2013, 10:15 AM
3star 3star is offline
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Quote:
Originally Posted by DinanBimmer View Post
I have a manual with a cable setup. I do want to upgrade my clutch, but i'm only doing that once the one I have in it starts slipping.
Oh that suppercharger will make that happen soon

Also how many miles are on the motor, if its high u may wanna just replace the head gasket and get a valvejob done before suppercharging
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  #11  
Old 04-17-2013, 11:53 AM
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Quote:
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Oh that suppercharger will make that happen soon

Also how many miles are on the motor, if its high u may wanna just replace the head gasket and get a valvejob done before suppercharging
Ya it has 300,000 and counting, so yes to all of that.
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  #12  
Old 04-17-2013, 12:01 PM
3star 3star is offline
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Originally Posted by DinanBimmer View Post
Ya it has 300,000 and counting, so yes to all of that.
Supercharging that engine is gonna be a costly mistake.

No way it'll survive for long.

You need to decarb it and replace the head gasket and valve stem seals for sure. And he head bolts.

Even then I'd still be worried about the bearings and rings.

BMW makes some tough motors but boost on a 300k motor is asking alot from the poor motor.

If i were you I'd try to secure a back up engine from a junk yard before buying the supercharger so when that one lets go you can get it running again quick m62s are dirt cheap nowadays
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  #13  
Old 04-17-2013, 01:57 PM
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Quote:
Originally Posted by 3star View Post
Supercharging that engine is gonna be a costly mistake.

No way it'll survive for long.

You need to decarb it and replace the head gasket and valve stem seals for sure. And he head bolts.

Even then I'd still be worried about the bearings and rings.

BMW makes some tough motors but boost on a 300k motor is asking alot from the poor motor.

If i were you I'd try to secure a back up engine from a junk yard before buying the supercharger so when that one lets go you can get it running again quick m62s are dirt cheap nowadays
Don't worry, supercharging my car is a long ways off. My plan right now is to drive the car on the original engine until it gives out. Then I might replace the engine. Depends on if I want to change it up or not. I figure I might have a little fun with some Dinan upgrades though. My car is part of the family. Depends on how much my wallet can take before I don't have the patience or money to deal with it anymore.
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  #14  
Old 04-17-2013, 06:40 PM
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If the OP needs more power, these may help:
- CAI 101 should I do it or not (1) and which is better, stock or aftermarket cold air intake (1) (2) & a home-made CAI (1) & the general consensus on the effectiveness of an aftermarket CAI versus the stock BMW CAI (1) (2) (3) (4) (5) & how to reduce the risk of hydro lock (1) (2) & what about a K&N oiled air filter over the stock air filter (1) & a forced induction group buy (1) and adding nitrous oxide to your E39 (1) & links to suppliers to improve performance of your E39 (1)
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Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #15  
Old 04-17-2013, 08:31 PM
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I have some m5 heads if you're down. Get some pistons and do this
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