ALRIGHT, i got bit by the M50 bug again.

[Brian 89 325i]

How do the stroking combos work with the M50? I had entertained buying an S50 but it just doesnt seem all that possible. WIll i need custom pistons?what kind of HP can you expect from a stroked M50 with just the bolt ons? Thanks

Brian

[oskard]

trent: did you use a e36 clutch or a e30 clutch ? and also what flywheel ? :)

[whakiewes]

Depends what you do. Either way you will have to have your pistons shaved or buy custom pistons. You can bore to 85.5mm with a vanos block, and 86mm wiht a non-vanos block. If you do the vanos engine, you should be looking at around 230-240engine hp. If you do the headwork with cams, you are talking atleast that much in rwhp. If you do a non-vanos, your looking at about 250engine hp, maybe a little more. It already has a 250/9.6 exhaust cam. Put in a Schrick 256/10.6 intake cam and your talking quite a bit of power.

Wes

[Brian 89 325i]

So if i get a NON vanos and bore to 86mm get custom pistons, what crank do i use?
Whats better for mostly street car with ocasional track use, vanos or non? I dont think i want to go crazy with this swap, i was just originally planning to swap in an M50 with some bolt ons and some software. What kind of #'s could you get from that setup.
Vanos M50
M3 cams or better
software
free flow exhaust
Just the basics.

Brian

[whakiewes]

For anything above a mild stroker, vanos is better 10:1. It has the ability to do a lot more and gain more power from those things. The non-vanos will require less money to make some power. You can use either the 3.2L crank or the 3.0L crank. You use 3.0L rods.

An M50 vanos with intake, straight exhaust, M3 cams, and software should put you at atleast 200whp. That combined with your weight of around 2700lbs makes your power to weight ratio better than an E36 M3. In theory you should be faster, and forsure if you keep the 3.73 diff out back. An M50 vanos is a great engine no doubt, but dollar for dollar it would be cheaper to build a streetable non-vanos engine.

Wes

[Brian 89 325i]

Alright, cool, ill try to find a 93+ M50 and then get to gathering parts, im hoping for this summer. We'll have to see about that.

Brian

[whakiewes]

I have everything you need including the engine...IM me at whakiewes whenever you get the chance.

Wes

[JPbmw]

so for how much do you think a set up like that would cost
also if you bore a NON-vanos to 86mm do you have to get custom pistons or can you still use the stock pistons?

[Brian 89 325i]

First off if you BORE anything you MUST get custom pistons as the old ones will just drop right through the cylinder. The cost depends on how much you can do your self, if you have hookups, BUT plan on about 800ish for pistons. + motor,ecu,harness + extra parts + swap cost (if you cant do it yourself)

Brian

[whakiewes]

Here is a short figure of the cost to do a transplant:

Engine/ECU/Harness/Manifolds etc.. = $1000
M5 engine mounts = $350
Exhaust = $500
Intake = $200
Swap CD = $150
Cooling hoses = $100
Misc. Parts = $200
Total = $2500
There is a lot more that goes into it other than that, but those are prices if you do everything yourself.

[Brian 89 325i]

Thats a super basic swap. Hey Wes if youve got an engine setup for a grand LET ME KNOW. ILL TAKE IT!!!!

These swaps could go in to 10k or more, but NOT MINE!!!

Brian

[whakiewes]

I do, I will email you the specs when I get a little more time.

Wes

[Bryson]

my e34 m50 just walked into the shop today

[Brian 89 325i]

Did any of the E34's come with VANOS? If so i want one.

Brian

P.S. Bryson, keep me updated on your swap, ill definately need some info.

[Bryson]

Did any of the E34's come with VANOS? If so i want one.

Brian

P.S. Bryson, keep me updated on your swap, ill definately need some info.

I'm assuming the e34s got the vanos update when the e36s got it, but mine's a '91, so it's non-vanos, plus this keeps everything in my car '91 vintage :)

Will do, Brian