 1.8 - 2.0 Frankenstein, Using 2.0 C&Ps on 1.8? |
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| SteveNMaine |
 Oct 18 2025, 05:31 AM
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Member  Group: Members Posts: 94 Joined: 12-August 24 From: Maine Member No.: 28,288 Region Association: None  |
Last winter I built a 2056 using a 1975 2.0. This winter I am rebuilding a 1974 1.8.
The 1.8 has one trashed C&P so I am wondering if I can use the old 2.0 C&Ps for my rebuild, using all four of course. Everything seems to fit; head to cylinder register, cylinder to block register, wrist pins for connecting rod, etc. There is only a +1mm difference in bore diameter. I am not trying to build a HP engine just something close to stock. Any insights? |
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| Dave_Darling |
Oct 19 2025, 07:56 PM
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914 Idiot Group: Members Posts: 15,298 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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That's correct. The 1.8V engines ran something like a full point more compression than the regular 1.8 engines. I think it was all in the pistons, as well.
That's the main reason the carbureted 1.8s were rated at 85 HP and the injected ones were rated at 76 HP. (Both DIN spec.) The 1.8V engines also required high-octane fuel, while the regular 1.8s do just fine on regular-grade. --DD |
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Posts in this topic
SteveNMaine 1.8 - 2.0 Frankenstein Oct 18 2025, 05:31 AM
Mike D. IIRC, I think you would have very low compression.... Oct 18 2025, 10:15 AM
SteveNMaine
IIRC, I think you would have very low compression... Oct 18 2025, 11:24 AM brant Agreed. The wrist pin height is different
Get a ... Oct 18 2025, 10:18 AM SteveNMaine So, I see two different part numbers for 1.8 pisto... Oct 19 2025, 06:19 AM chmillman
So, I see two different part numbers for 1.8 pist... Oct 19 2025, 06:24 AM |
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