Just surfing the local FBMP, and someone has a 1.8L head for sale for 300 Canadian Maple biscuits with butter and a Timmy's double double eh! . I am thinking of perhaps swapping out the head/hoarding parts for the build. I have read the forum and understand that I will likely need new pistons, which is kinda what I thought I would need to do anyway. Do they really flow better? Thanks in advance.

Me, having had a bad experience with extra holes drilled into the head, I'd also find the E30 version- it's the same casting, so it has the same bosses, just no drilling. That said, I've never heard of the late E21 head having any more propensity to crack... 300 for a late E21 engine seems a bit much, but not exorbitant, especially if it gets you a few other things that might be useful. Plugging the holes can be as simple as freeze plugs- but they may whistle! The late E21 block is heavier than the E30 block- they remade the casting for the E30. I do recall it's lighter than a 2002 version, but I don't remember where it falls on the 'overbore ability versus strength' scale. It does have all the 2002 bosses cast into it, but they may not all be tapped- I remember one being tapped at 6mm for a little bracket whereas the 2002 wanted 10mm for a mount. Rods work, crank is good for cutting up into paperweights, some of the ancillaries (like the pulleys) are different, and therefore useful for other things. t

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1.8 L head good for boost?

By Dudeland,
November 18, 2022 in BMW 2002 and other '02

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Go to solution Solved by TobyB, November 18, 2022

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2002 AD

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2002AD sells every part for the 2002: new, used, performance, aftermarket, reproduced, rebuilt, and Mobile Tradition/BMW Classic