m10 to m40 conversion
Moderator: martauto
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GrindCulture
- E30 Zone Addict
- Posts: 2955
- Joined: Mon Mar 03, 2008 11:00 pm
- Location: Exeter
If it's a carbed engine, then no, itll need some wiring fettling and bits added to the fuel system (sorry for being a bit vague as I don't actually know exactly what it will entail.)
In standard guise, the M40 is a better engine than the M10, but most M40s have a knackered top end and sound like a bag of nails. Tuning the M10 will compromise economy but big figures can be gained if you've got the cash. If he's still set on an upgrade and want to stay single cam, go for an M43. For cheaper 4 pottering power, go M42.
In standard guise, the M40 is a better engine than the M10, but most M40s have a knackered top end and sound like a bag of nails. Tuning the M10 will compromise economy but big figures can be gained if you've got the cash. If he's still set on an upgrade and want to stay single cam, go for an M43. For cheaper 4 pottering power, go M42.
Not in E30s any more 
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stephan1608
- E30 Zone Newbie
- Posts: 1
- Joined: Thu Jul 27, 2017 11:00 pm
am on the same problem am taking off the m10b16 cab and planning to pou put an m40b18... where should i start am a bit lost right now...GrindCulture wrote:If it's a carbed engine, then no, itll need some wiring fettling and bits added to the fuel system (sorry for being a bit vague as I don't actually know exactly what it will entail.)
In standard guise, the M40 is a better engine than the M10, but most M40s have a knackered top end and sound like a bag of nails. Tuning the M10 will compromise economy but big figures can be gained if you've got the cash. If he's still set on an upgrade and want to stay single cam, go for an M43. For cheaper 4 pottering power, go M42.
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Brianmoooore
- E30 Zone Team Member
- Posts: 49353
- Joined: Mon Jan 10, 2005 11:00 pm
Engine, gearbox, radiator, gear linkage, engine wiring loom, propshaft, ehaust out, and M40 equivalents in.
You will need to fit a fuel pump in the tank, and add the fuel return line from the engine bay. The pump will fit, but unless your car is a late one for a M10, you may be missing the anti fuel starvation dish welded to the bottom of the tank that the bottom of the pump sits in.
Again, if the M10 is a late one, the pump wiring should be mostly in place, and the M40 engine loom should plug straight into your car.
As in the post above yours, a lot of work for little gain. If you're doing the work, at least go for a 16 valve four pot.
You will need to fit a fuel pump in the tank, and add the fuel return line from the engine bay. The pump will fit, but unless your car is a late one for a M10, you may be missing the anti fuel starvation dish welded to the bottom of the tank that the bottom of the pump sits in.
Again, if the M10 is a late one, the pump wiring should be mostly in place, and the M40 engine loom should plug straight into your car.
As in the post above yours, a lot of work for little gain. If you're doing the work, at least go for a 16 valve four pot.