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Discussion Starter #1
Hi,
I need help sourcing detailed specs/info on early 1750 105 motors and what the differences are between them and the later Alfetta motor, other than the filter & crank.
I need to fit a new motor to my Ti Super replica and can go to a 1750 with the regulations I run under.
If some one has this info or preferably can let me know where I can obtain copies of detailed specs I would be most grateful.
Thanks.
Jim
 

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You would be better off asking this queston on the English Alfa Forum, teh usually very useful members here have little knowledge of the later 1750's. I have a couple sitting round and can tell you that , crank is same as 2 litre, sadly without hole for spigot bearing, block on 75 model is stronger with ribbing, there are a couple of minor casting differences. late 1.8 cams have bigger base circle,I think they may have different porting?
 

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Discussion Starter #3
You would be better off asking this queston on the English Alfa Forum, teh usually very useful members here have little knowledge of the later 1750's. I have a couple sitting round and can tell you that , crank is same as 2 litre, sadly without hole for spigot bearing, block on 75 model is stronger with ribbing, there are a couple of minor casting differences. late 1.8 cams have bigger base circle,I think they may have different porting?
Thank you Hans-Peter
 

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Hey Jim,
105 1750 to 116 1.8; basically you have it, with the filter location; both the block and timing cover are obviously different for the spin-on filter. Other than that the blocks are dimensionally identical, the heads can be slightly different in the port sizes (not necessarily in a good way!) and of course the 1.8 has a nitrided 6 bolt crank. There is no logical argument for a 116 base engine to not be allowed in place of a 105 one, however I know there has been resistance from CAMS in the past because they reckon the oil filter location makes it too different......I'm not sure if anyone has had success recently in getting it allowed officially.
I'm aware that the 1750 is eligable for use in a GTVeloce, because there is record of one in this configuration competing in Australia back in period. Check if this is so for the Super TI as well before you go down this track.
Cheers,
vin
 

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Discussion Starter #5
Hey Jim,
105 1750 to 116 1.8; basically you have it, with the filter location; both the block and timing cover are obviously different for the spin-on filter. Other than that the blocks are dimensionally identical, the heads can be slightly different in the port sizes (not necessarily in a good way!) and of course the 1.8 has a nitrided 6 bolt crank. There is no logical argument for a 116 base engine to not be allowed in place of a 105 one, however I know there has been resistance from CAMS in the past because they reckon the oil filter location makes it too different......I'm not sure if anyone has had success recently in getting it allowed officially.
I'm aware that the 1750 is eligable for use in a GTVeloce, because there is record of one in this configuration competing in Australia back in period. Check if this is so for the Super TI as well before you go down this track.
Cheers,
vin
Vin,
Is there any documentation on both motors other than owners manual?
Jim
 
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