Radko

Hello! I'm new here and want to ask you about this head change. I want to raise the compression rating( Compression pressure) and I also have 1.6 head. Are there any risks in doing that?
To add: Drive on carb
Radko

black_jack

Yes, there may be risks involved, and/ or disadvantages, i don't know about the exact differences between the 2.0 and 1.6 pinto head, but the bore on the 1.6 is probably smaller, the ports and valves may be smaller to match, so the 1.6 may be restrictive compared to the 2.0 head, the 1.6 combustion chamber may be the wrong size and shape for the 2.0 bores, and the squish "wrong"

Once you raise the compression ratio you may need to richen the mixture, run colder plugs, adjust the ignition timing or use higher octane fuel to avod detonation

Normally in English language/ UK (and also probably the USA) we use the term "compression ratio" - the normal way to increase the compression ratio on a 2.0L pinto would bo to use thinner gaskets or skim the original (2.0L) head

Radko

Yup! My mistake for the CRatio! Thanks for the answer! I may not use the 1.6 head. The differences in the ports are quite large. I know that skimming is the best choice! I may also have a 1.8 head. Would the 1.8 be more appropriate for this type of modification?

black_jack

I don't know, possibly not, as the 1.8L is probably a "sleeved down" vesion of the 2.0L, (depends on the bore/ stroke) you would have to examine the 1.8L head carefully, take measurements, and compare it to the 2.0L head

If it was me i would probably use the 2.0L head, i would get some expert advice on how much to skim off it, and the type/ thickness of head gasket to use, i would clean/ smooth out and polish the combustion chamber and all ports, and match them to the inlet/ exhaust manifolds

really depends what you want to do/ how much you want to spend

i might use (1 grade) colder plugs and run the engine a little richer (bigger jets etc)

Radko

I would consider your oppinion! Thnks I want to change the head because the cam is in not so good condition! I don't want to make a race engine out of it! If i use my head (which is an injection head) will the cam from 1.6 E-max match it?
Add: I'm using carb not injection!