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Also, timing the 197 cams in a 172 has any tricks?

Subframes are bolted to 4 holes so i cant see it being "mis-aligned"

so, time to start looking for a set of them cams

So 197 cams are a good upgrade performance wise, did you have any issues regarding idle stability?

Red print is with a custom map? What electronic did you use? Stock sensor and dephaser pulley from a 172?

And how will it be in terms of power curves, i mean, will it be like an Honda? I have an almost stock phase1 engine im willing to work on but i have to keep it "stock" in the outside because modded cars in spain are "almost criminals"

So you say i can put 197 cams (both of them) into a 172 head and leave it as it is and i'll get the vvt as an "on/off" system? Is there any benefit from that?

Yes you can but its a massive of a job So building a 172 block with a 197 head means standalone ECU?

And it wont look OEM (i need it to look oem for the spanish MOT b******s) I read i'll need the pistons to keep the CR as it is, and i read a hole has to be drilled and tapped for a pulley to fit, are these all the issues or are there more, i think the stock 172 computer wont be able to cope...

but it says there he used a full 197 head "modified" to fit over a 172 block, i will keep reading maybe he makes it clearer to undertand how he did it

Is it possible? im researching for the best possible intake using OEM renault parts and i cant see how people put 197 inlets into 1x2 heads as the injectors are the other way around. I used the search and found nothing. thanks in advance