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What cylinderhead did I just buy and what chamber volume?


Guest Anonymous

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Guest Anonymous

I've bought a cylinderhead with holes for fuel injectors (they

weren't open yet when I bought the head). It has an '80' mark

and says 1.8i, but I only know e12, 121, etc. What head is this

and what should the chamber volume be?

Thanks,

Hugo

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Guest Anonymous

18i_plugFI.jpg

The head is known as 1.8i & has 63 cc chambers.

In the USA, this came on the E21 3 series cars.

I like using the head, but for carbs it's best to plug the injectors in a manner that leaves the port wall flush.

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Guest Anonymous

BEAUTIFUL WORK - I LIKE THE ROLL PIN TO MAKE

SURE THE PLUG DOES NOT MOVE .

I HAVE A 1.8i HEAD WITHOUT THE INJECTOR PORTS , IT

CAME FROM A 318i . I THINK THE ONES WITH THE PORTS

CAME ON LATE 320i E21 CARS .

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Guest Anonymous

It has no injector holes and has (if I remember) same volume as the head from the e21. Not having injector holes to plug means less work to do.

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Guest Anonymous

standard.jpg

larger combustion chambers, to bring total compression down a bit for crappy ca. gas. also, they tend to have less plug thread damage, and they are younger than the typical M10 heads, therefore usually cleaner internally: not need to change plugs as often on those engines. here is a picture of mine: 1985:.....standard.jpg......standard.jpg...... ( this is from MM for the 2.2L engine)

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Guest Anonymous

This head was bought new back when they were current production, predating the E30 by a year or so. At the time, it was the best way to achieve what I wanted. It was fresh out of the box then bored out to accept a big journal Schrick & a few other tricks for my 10.5:1 1976 M10.

When the E30 318 head became availabe later on, it came with a higher list price. They remained over $200 more expensive for aftersales when both models ended production.

Of course, either one can be had used, and that's probably the way to go for experimenting!

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Guest Anonymous

The injector bungs are already the right size and shape, and you get the fuel rail and a place to mount your fuel pressure regulator (its also very easy to find different pressure regulators).

Cheers!

John N

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