im sure this has been asked before but i just cant find the right topic.
I have an M20b20 engine and want to swap it for a 2.5 M50 engine. I am no expert in this field so i was wondering what modifications i will have to do. Will i have to change the box n prop shaft. Wat manifold would i have to get and some1 sed sumthin about a servo change aswell. Could someone spell ti out for me please???
thanx
M20b20 to M50
Moderator: martauto
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DanThe
- E30 Zone Team Member

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- Location: Staffs
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daimlerman
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All the information is in the link that Dan has pointed you toward,however,30 odd pages does take some wading through.On my build (have a hunt through the photo gallery for 'daimlerman's folly') I have used,standard prop,M40 gearbox with 320 gearlever mounting bracket,325 clutch on an M20 flywheel with matching M20 starter,M50 engine.I used a brake servo from a 2000 clio,E34 throttle cable,E34 engine mounts on E36 brackets,E36 engine loom modified to suit the E30 car loom.I tried and failed to make an exhaust manifold/downpipe from a pair of M52 manifolds and a 325 frontpipe and instead spent a years pocket money with Fritzbits for their custom built s/s manifold/downpipe.Do be sat down when you phone for a quote... That's the basics...baybee wrote:im sure this has been asked before but i just cant find the right topic.
I have an M20b20 engine and want to swap it for a 2.5 M50 engine. I am no expert in this field so i was wondering what modifications i will have to do. Will i have to change the box n prop shaft. Wat manifold would i have to get and some1 sed sumthin about a servo change aswell. Could someone spell ti out for me please???
thanx
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georob
- E30 Zone Camper

- Posts: 1106
- Joined: Thu Feb 03, 2005 11:00 pm
- Location: Aberdeenshire
How much were you for manifolds? I'm guessing 6-700ish?
E34 x 1 - V8 + lots of CF
E30 x 2 - Tourings (1 x M50, 1 x M40)
RS6 C5 - Stage 1 remap - 500bhp
George
E30 x 2 - Tourings (1 x M50, 1 x M40)
RS6 C5 - Stage 1 remap - 500bhp
George
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Cook318IS
- E30 Zone Addict

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daimlerman wrote:All the information is in the link that Dan has pointed you toward,however,30 odd pages does take some wading through.On my build (have a hunt through the photo gallery for 'daimlerman's folly') I have used,standard prop,M40 gearbox with 320 gearlever mounting bracket,325 clutch on an M20 flywheel with matching M20 starter,M50 engine.I used a brake servo from a 2000 clio,E34 throttle cable,E34 engine mounts on E36 brackets,E36 engine loom modified to suit the E30 car loom.I tried and failed to make an exhaust manifold/downpipe from a pair of M52 manifolds and a 325 frontpipe and instead spent a years pocket money with Fritzbits for their custom built s/s manifold/downpipe.Do be sat down when you phone for a quote... That's the basics...baybee wrote:im sure this has been asked before but i just cant find the right topic.
I have an M20b20 engine and want to swap it for a 2.5 M50 engine. I am no expert in this field so i was wondering what modifications i will have to do. Will i have to change the box n prop shaft. Wat manifold would i have to get and some1 sed sumthin about a servo change aswell. Could someone spell ti out for me please???
thanx

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daimlerman
- **BANNED**
- Posts: 15968
- Joined: Mon Feb 27, 2006 11:00 pm
- Location: Grumpy Old Man
Frizbits say £750,then add on delivery and VaT,on my doorstep a wisker under £900.... but I was at the point where it was spend the cash or transport the car to someone else to fabricate a manifold for me,as at this point the car was nowhere near road legal I opted for spend the cash.I suspect that the cost of transporting the car back and forward and the cost of fabricating a manifold would not be significantly less than Fritz.And it does both look good and sound good! In addition to this,at this point in my build I received a large income tax refund as well...georob wrote:How much were you for manifolds? I'm guessing 6-700ish?

