Megane 225 piston valve pockets machining..

[incy-spider]

Hi guys, I’m after some info... fitting megane 225 OEM pistons to a Clio F4R block and wanting to retain VVT... I have been told I’d need to get some valve pockets machined into the crowns. Can anyone give me any drawings or info on this? Or recommend someone who can/has done them that I can possibly send them too?

I have friends at machine shops but assuming they will need info [emoji106][emoji106]

Cheers

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[incy-spider]

Don’t worry, sorted it. Thanks for all the reply’s... pricks [emoji23][emoji23][emoji23]

I put the same question up on the FB page and got a load of unwanted advice about not bothering and go forged etc... not what I was asking!

Get back to your polishing and love island talk guys ??‍♂️[emoji4]


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[Clio_fool]

Lol, what's the answer then? I'm a cnc machinist and just curious.

 

[incy-spider]

Lol, what's the answer then? I'm a cnc machinist and just curious.

Basically have a scrap F4r piston coming from Nick at PMS to copy..


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[NorthloopCup]

Basically have a scrap F4r piston coming from Nick at PMS to copy..


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If I’d seen this thread earlier that’s the exact thing I would’ve told you to do! Copy a scrap f4r piston!!

 

[bloke]

250 head gasket would probably be the cheaper and easier way around it.

 

[incy-spider]

250 head gasket would probably be the cheaper and easier way around it.

To clear?


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[bloke]

yup, double check the pocket depth but the meg gasket is about 1mm thicker so is going to get you about there, also am sure i've heard of a couple of people running vvt with meg pistons and possibly just 225 gasket.

 

[incy-spider]

yup, double check the pocket depth but the meg gasket is about 1mm thicker so is going to get you about there, also am sure i've heard of a couple of people running vvt with meg pistons and possibly just 225 gasket.

I’ll be running a 1.3mm gasket anyway to get to 9:1 ratio, but Chris@ efi said they run very close so worth getting the slots done


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[Clio_fool]

If you can do them yourself or at mates rates then why not? I'd rather be safe than sorry. Keep us updated please (still nosy[emoji1])[emoji106].

 

[bloke]

stick some forged flat tops in it, run it about 11:1 and chuck 1 bar boost at it, be fun then ?