Alfa Romeo Forum - View Single Post - For your perusal and entertainment - 164 12v vs 916 GTA 24v 3.0 Busso
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(Post Link) post #6 of Old 21-05-19 Thread Starter
Status: 1 Subaru, 2 Bussos,noAlfa!
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mj2k's Avatar
Join Date: Sep 2015
County: Herts
Posts: 1,520

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Subaru Legacy H6

And the final one in the series - 2.5 24v crankshaft with 3.0 pistons and rods. Should be no issue at all since the conrods are the same length and sure enough, it isn't

3.0 crankshaft

2.5 crankshaft

So using the 2.5 crankshaft would give a low compression engine (roughly 7.0:1) ideal for turbocharging, and would have the advantage of making it a non-interference engine so less chance of catastrophic damage if the cambelt snaps

Don't think this 2.5 crankshaft would be much good as it is however - there is one vital difference between the 12v 3.0 crankshaft and the 2.5 24v - the bearing which the oil seal beds down on is missing from the later one:

The space where it should be is normally filled by the oil pump drive cog. Anyone got one of those going spare which I can grind down by any chance?
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