Head gasket thickness change

[Rhys Beal]

Can anyone tell me what the cr would be on a f4r with a megane 225 head gasket? Standard f4r gasket is .65mm I belive and the f4rt is 1.3mm for reference.

 

[Dan@SJM]

You haven't specified what cylinder head, what Pistons, etc. Tbh you need to CC the head and go from there

 

[Rhys Beal]

Ah okay. Well if it helps it is a ph1 172 engine with standard Pistons but megane 250 rods

 

[R3k1355]

I assume you've skimmed the head to ensure it's properly flat as well?

 

[Rhys Beal]

I haven't actually done anything as of yet. It's all hypothetical. I want to know if my hair brain idea will work

 

[bloke]

and your idea is...

 

[Rhys Beal]

Crazy.
Engine currently has catcams 438's and I want more power so...
I was thinking whether it's possible to run megane 250 rods with my standard Pistons, megane head gasket and porting the head chamber to lower the compression to 10:1 then running an eaton m62 supercharger with wmi. There will be other small changes to the engine within that process too, megane bottom keywayed pulley, injectors, new rings etc etc.

 

[NorthloopCup]

Crazy.
Engine currently has catcams 438's and I want more power so...
I was thinking whether it's possible to run megane 250 rods with my standard Pistons, megane head gasket and porting the head chamber to lower the compression to 10:1 then running an eaton m62 supercharger with wmi. There will be other small changes to the engine within that process too, megane bottom keywayed pulley, injectors, new rings etc etc.

Space (and not the final frontier type) will be more of an issue tbh mate with an m62. M45's the better option off a copper s (later ones have Teflon coated rotors) as its slightly easier to package due to size, but it also gives you the option to drive the alternator off the other end of it.
Spec wise it's easily possible and not crazy other than trying to mimic each combustion chamber. Not impossible, but time consuming so obviously that adds to the costs.

 

[Rhys Beal]

Space (and not the final frontier type) will be more of an issue tbh mate with an m62. M45's the better option off a copper s (later ones have Teflon coated rotors) as its slightly easier to package due to size, but it also gives you the option to drive the alternator off the other end of it.
Spec wise it's easily possible and not crazy other than trying to mimic each combustion chamber. Not impossible, but time consuming so obviously that adds to the costs.

I actually already have an m62 (same as Courtney's use on their vx220) so I know it fits but you're righy its tight! I have no front scuttle panel so have a fair bit of room. It's tossing it up between supercharging the existing engine or running a AGU 1.8T with vag box and re working the whole thing. I have been given the AGU engine so have that aswell!

 

[NorthloopCup]

I actually already have an m62 (same as Courtney's use on their vx220) so I know it fits but you're righy its tight! I have no front scuttle panel so have a fair bit of room. It's tossing it up between supercharging the existing engine or running a AGU 1.8T with vag box and re working the whole thing. I have been given the AGU engine so have that aswell!

AGU. More reliable. Lol!

 

[Rhys Beal]

AGU. More reliable. Lol!

Haha
So my next thread will be engine and box for sale then!

 

[R3k1355]

A thicker HG will lower the CR, but you'd need a specialist to tell you exactly what CR it's running.

 

[Laine_16v]

Engine dynamics did the hard works for us. Theres a comparison table of different HG's and Cylinder heads and the resultant compression ratio achieved.

 

[marinemackay2003]

May be worth banging up the link Laine save a few pm's