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by fp55scca
Sat Sep 21, 2019 11:51 am
Forum: Tech Questions and Advice
Topic: Need information on an odd combination
Replies: 12
Views: 275

Re: Need information on an odd combination

...it sounds like the 1608 would "have" to be welded. Otherwise wouldn't coolant flood the number 1 cylinder? -------------------------------------------------------- --David, I agree, if your 1608 were not welded up at the front water port, I believe it would intrude into the #1 cylinder.
by fp55scca
Fri Sep 20, 2019 9:31 am
Forum: Tech Questions and Advice
Topic: Need information on an odd combination
Replies: 12
Views: 275

Re: Need information on an odd combination

--David, can you find your head number on this summary? Which one would it be?

https://www.mirafiori.com/faq/content/h ... eadid.html
by fp55scca
Thu Sep 19, 2019 10:13 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 14
Views: 206

Re: Crankshaft Part Numbers 124 Spider

The division was not in 1974/75, but in the middle of the 1977 model year. That is when the nose of the crank, crank timing belt gear and crank pulley all changed. -------------------------------------------- --Csaba, right you are...my mistake. But what about crankshaft flywheel bolts? Didn't Fiat...
by fp55scca
Wed Sep 18, 2019 11:15 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 14
Views: 206

Re: Crankshaft Part Numbers 124 Spider

--Brad, good stuff. Our numbers don't seem to match, particularly for 1608, and 1756cc cranks. I think we should sort this out, and then generate a listing of all known crankshafts, much as we did for head numbers years ago. --When a crankshaft was in an original motor, it was a relatively safe bet ...
by fp55scca
Wed Sep 18, 2019 11:01 am
Forum: Tech Questions and Advice
Topic: 1/2 tooth off timing belt options
Replies: 6
Views: 169

Re: 1/2 tooth off timing belt options

--Some have suggested I need to time the stock cams/crank if I'm using the adjustable wheels. You would seem to disagree. --rotating the intake cam counter-clockwise makes the intake valve open later which might tend to reduce power but improve fuel economy and reduce unburned HC. -----------------...
by fp55scca
Tue Sep 17, 2019 3:45 pm
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 14
Views: 206

Re: Crankshaft Part Numbers 124 Spider

--This update includes a 2L (1995cc) casting #. Still need any 1438 #'s if available. --Good response here. I suspect Csaba's observation that part numbers may differ from casting numbers is probably correct. I'll try to verify some of this today. Here's what I have so far from the responses: ? - 1...
by fp55scca
Tue Sep 17, 2019 12:20 pm
Forum: Tech Questions and Advice
Topic: 1/2 tooth off timing belt options
Replies: 6
Views: 169

Re: 1/2 tooth off timing belt options

—Right Mike, that would be as viewed from the front. —I see the head gasket issue. Typically, a 2L head will serve to reduce compression a bit as well. —Just for clarity, there is no “setup” needed for adjustable cam wheels. Maybe you’re thinking of “timing the cams” which is another matter. With ad...
by fp55scca
Tue Sep 17, 2019 11:16 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 14
Views: 206

Re: Crankshaft Part Numbers 124 Spider

--This update includes a 2L (1995cc) casting #. --Good response here. I suspect Csaba's observation that part numbers may differ from casting numbers is probably correct. I'll try to verify some of this today. Here's what I have so far from the responses: 4235063 - 1971-1973 - 1608cc 4238530 - 1973 ...
by fp55scca
Tue Sep 17, 2019 12:46 am
Forum: Tech Questions and Advice
Topic: Crankshaft Part Numbers 124 Spider
Replies: 14
Views: 206

Re: Crankshaft Part Numbers 124 Spider

—Thanks guys. Maybe we could post these numbers in the library for future reference?
by fp55scca
Tue Sep 17, 2019 12:24 am
Forum: Tech Questions and Advice
Topic: 1/2 tooth off timing belt options
Replies: 6
Views: 169

Re: 1/2 tooth off timing belt options

—Mike, advance the intake cam 1/2 tooth (counterclockwise) for now. Then order some adjustable pulleys. —You can actually remedy the situation with one adjustable cam pulley, so you could split a set with someone if you like. You don’t really need two. —Curious why you needed a thicker head gasket?