CR for Rebuild

Competition engines and ancillaries - general discussion
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t00nces
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Joined: Sun Aug 27, 2017 1:16 am
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CR for Rebuild

Post by t00nces » Sun Oct 08, 2017 2:03 am

Greetings,

I'm in the process of rebuilding a '81 Fiat 2000 FI and I plan on putting an 1800 port/polished head w/stock cams on the original bottom end. I'm new to the rebuild process and my reading so far suggests that I need to take into account total compression when determining what piston CR I should choose. So, with the 1800 head as noted above, what is my upper CR limit for the pistons and the engine overall? Forged over cast pistons - correct?

Any advice greatly appreciated and thank you in advance.

Regards,

t.
GC 156

Piotrek125p
Posts: 209
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Location: Lodz,Poland
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Re: CR for Rebuild

Post by Piotrek125p » Sun Oct 08, 2017 12:16 pm

Hi,

Everything that you need including a CR calculator you have here:

viewtopic.php?f=3&t=2883

and here

viewtopic.php?t=129

With 1800 cast pistons in 2000 you will get about 9,6:1 CR, good for mild tuned 2L TC with stock cams.

About all of rebuilding process, I really advice 2013 GC book, everything is there, step by step with a lot of photos.

Sincerely
Piotrek.
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t00nces
Posts: 2
Joined: Sun Aug 27, 2017 1:16 am
Contact:

Re: CR for Rebuild

Post by t00nces » Sun Oct 08, 2017 2:25 pm

Thank you for the reply and the advice.

Regards,

t.
GC 156

Piotrek125p
Posts: 209
Joined: Sun Dec 02, 2012 3:45 pm
Location: Lodz,Poland
Contact:

Re: CR for Rebuild

Post by Piotrek125p » Sun Oct 08, 2017 3:32 pm

Could you give me some details about your TC head ? What have you done with ports, valves, guides, seats etc. ?
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