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m10 to m40 conversion
Posted: Thu Jan 29, 2009 2:12 am
by konflik1
a buddy of mine has a m10 motor in his car.as i am looking to do the m20 conversion he is looking to do the m40 conversion.can the m40 engine work with the m10 ecu and wire harness.info needed please
Re: m10 to m40 conversion
Posted: Thu Jan 29, 2009 10:48 am
by Alex
its not worth the hasstle
an m10 engine is a far better engine than the m40 in reliabilty terms and there wont be much difference in prefromace
keep the m10
Re: m10 to m40 conversion
Posted: Thu Jan 29, 2009 5:36 pm
by GrindCulture
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.
Re: m10 to m40 conversion
Posted: Tue Aug 29, 2017 6:14 am
by stephan1608
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.
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...
Re: m10 to m40 conversion
Posted: Tue Aug 29, 2017 9:59 am
by Brianmoooore
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.