Source for Twin Spark Motors? - Alfa Romeo Bulletin Board & Forums
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post #1 of 29 (permalink) Old 09-15-2019, 10:17 AM Thread Starter
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Source for Twin Spark Motors?

Fellas -

Have been having all kinds of problems trying to find a good 75 twin spark motor to install in my 72 GT. Ended up with a nice cylinder head from Spain, and figured I'd be able to find a short block without too much trouble. That hasn't been the case.

Now I'm looking for either a short block (I really just need block, crank, and front cover), a long block, or a complete engine. Have been looking in Europe and the U.S. and no joy.

Does anyone have a source that I can check with? FYI - I don't mind paying the going rate, and I realize shipping from Europe will be expensive.

Thanks in advance for any info.

Scott

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #2 of 29 (permalink) Old 09-15-2019, 01:45 PM
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What exactly do you call a short block? A 155/164 2.0 8V TS, which is 13 mm shorter than the 75 TS?

I've got a 155 and a 164 block, with either a 155/164 front cover or a euro Nord front cover and a 90 mm stroke crankshaft.

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post #3 of 29 (permalink) Old 09-15-2019, 02:03 PM Thread Starter
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Originally Posted by Macaco View Post
What exactly do you call a short block? A 155/164 2.0 8V TS, which is 13 mm shorter than the 75 TS?

I've got a 155 and a 164 block, with either a 155/164 front cover or a euro Nord front cover and a 90 mm stroke crankshaft.
I forgot that not everyone uses the same terminology. To clarify - I want Alfa 75 8v Twin Spark only. A short block is another way of saying I just need the bottom end - block, crankshaft, connecting rods, and pistons. In other words, no cylinder head, no intake manifold or exhaust manifold.

Long block is a short block plus a cylinder head, but still no exhaust manifolds or intake manifolds.

Thanks,

Scott

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #4 of 29 (permalink) Old 09-16-2019, 07:48 AM
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75 engines (and 164 1st series) are getting scarcer and scarcer.
friend of mine has a 155/156 2 liter 16V working in his giulia. I allready adviced him to go make a conversion kit concerning the special made parts, and a shopping list for parts from other cars to trace.
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post #5 of 29 (permalink) Old 09-16-2019, 09:18 AM
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155 8v has oil squirters under the pistons, also no distributors and can be used in 75 also, and there are more 155 2.0 8v than 75 TSs out there... So if u can source 155 2.0 8v engine go for that.

16v engine isnt as good, its a fiat engine with cast iron block, crank is prone to wear, and has a wonky variator that likes to go bad.
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post #6 of 29 (permalink) Old 09-16-2019, 02:01 PM Thread Starter
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155 8v has oil squirters under the pistons, also no distributors and can be used in 75 also, and there are more 155 2.0 8v than 75 TSs out there... So if u can source 155 2.0 8v engine go for that.

16v engine isnt as good, its a fiat engine with cast iron block, crank is prone to wear, and has a wonky variator that likes to go bad.
I'm going to stick with a 75 TS.

Thanks

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #7 of 29 (permalink) Old 09-16-2019, 03:35 PM
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Australia was the biggest market outside a Europe for these. Plenty came here.
I realise it’s a long way away, but our dollar is like Monopoly money lately, so that should even the score.
Try Gumtree.com.au and the local OZ club ‘for sale’ sections (google AROCA Australia).
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post #8 of 29 (permalink) Old 09-16-2019, 07:31 PM Thread Starter
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Australia was the biggest market outside a Europe for these. Plenty came here.
I realise it’s a long way away, but our dollar is like Monopoly money lately, so that should even the score.
Try Gumtree.com.au and the local OZ club ‘for sale’ sections (google AROCA Australia).
Ok thanks

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #9 of 29 (permalink) Old 09-17-2019, 01:21 AM
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I'm going to stick with a 75 TS.

Thanks
special reason for that? I have a 155 block with 75 head. (ok full race specs and pistons special made because 90mm crank and nord rods, but that is own choice).

I have both a 155 block, can have spacer made up (is done allready for me, so they have the dimensions in their system). to tackle the diffference, and I have a TS crank. Only thing I do not have (yet..) is front cover. I do have a Nord cover that can go with it with sealed off distributor hole if you want to go to EFI. Only thing that needs to be done is adapt the sump at the back.
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post #10 of 29 (permalink) Old 09-17-2019, 05:13 AM Thread Starter
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special reason for that? I have a 155 block with 75 head. (ok full race specs and pistons special made because 90mm crank and nord rods, but that is own choice).

I have both a 155 block, can have spacer made up (is done allready for me, so they have the dimensions in their system). to tackle the diffference, and I have a TS crank. Only thing I do not have (yet..) is front cover. I do have a Nord cover that can go with it with sealed off distributor hole if you want to go to EFI. Only thing that needs to be done is adapt the sump at the back.
It just seems like too much effort to build a 155 based motor for a 105 chassis. If I wanted to go that route, I have a Nord 2L block and crank that I could bolt the TS head to.

Thanks

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #11 of 29 (permalink) Old 09-17-2019, 06:23 AM
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It just seems like too much effort to build a 155 based motor for a 105 chassis. If I wanted to go that route, I have a Nord 2L block and crank that I could bolt the TS head to.

Thanks
ok but than you dont have the advantages of the 155 block. (piston cooling , and bit shorter block which makes it a bit stiffer , at least I think..).

I check for you on the 75 block, he is just back from holidays. You have a good head you say, so short block will do I guess.
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post #12 of 29 (permalink) Old 09-17-2019, 07:27 AM Thread Starter
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ok but than you dont have the advantages of the 155 block. (piston cooling , and bit shorter block which makes it a bit stiffer , at least I think..).

I check for you on the 75 block, he is just back from holidays. You have a good head you say, so short block will do I guess.
Thanks, Veep.

Also, on the 75 motor, if I have to purchase the entire engine, that's fine, too. It wouldn't hurt to have a spare head.

Scott

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #13 of 29 (permalink) Old 09-17-2019, 08:08 AM
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sorry, sold to the UK..
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post #14 of 29 (permalink) Old 09-17-2019, 08:24 AM Thread Starter
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sorry, sold to the UK..
Ouch. Thanks for checking.

72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #15 of 29 (permalink) Old 09-17-2019, 02:34 PM
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Hi. I have several 75TS engines, either engine block + cranck + front cover or complete engines. Located in the Netherlands.

Contact me in case of interest.
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