FAO you clever RS specialists - 250 head on a 172 block?

[Craigie-B]

So today after having my ass handed to me by an audi s5 I came to the conclusion more power is needed!!!!

Im interested in putting a meggy 250 head on a 172 block what I want to know is will it fit like the 225 head does?

Cheers!

Craig

 

[Dan@SJM]

You don't want a 225 head, you'd loose the VVT. What are you trying to achieve?

 

[Cupman29]

If you're wanting boost vvt is not the be all anyway.

225 head is not a straight bolt on either.

 

[Knuckles]

Meg head on clio block = more power?

 

[Craigie-B]

You don't want a 225 head, you'd loose the VVT. What are you trying to achieve?

Thats why im asking about the 250 head fitting

Looking to turbo convert and want to use the head and internals from a meggy.

 

[Dan@SJM]

Use a 197 head.

 

[Craigie-B]

Problem with the 197 head Dan is that the plenum sits higher so wont go under a mk1 bonnet, the 172 plenum only just fits.

Sorry i should of been clearer from the start.

Its a mk1 with 172 engine looking to turbo charge and I know its possible to do in a mk1 with a 225 head but I was hoping to use a 250 head because of the vvt.

Now im using a 172 rad and clearence is an issue between the engine and the rad, Whatever I use as an inlet plenum cant exceed teh fuel rail guard and so I was considering the 250 inlet and head as that would physically fit in the bay - I just need to know if it will bolt onto the 172 block and all the oil/water passages etc line up like the 225 head does.


Or should I sack it all off and go for a 20vt conversion possibly in a 182? (Im looking to buy one anyway in about 6 months time for the gf which I will inherit in about 18 months)

 

[Dan@SJM]

Tbh I wouldn't bother using a different head. Just use forged pistons and rods and boost it like that.

 

[Craigie-B]

yeah? I was kinda hoping to use a diff plenum because I like the look of the 172 head without a plenum LOL

 

[imprezaworks]

Buy a quicker car? Clio would have had it in the twisties

 

[Cupman29]

yeah? I was kinda hoping to use a diff plenum because I like the look of the 172 head without a plenum LOL

Make a new inlet manifold like I'm doing then. Far easier than trying to get some other head to fit and can be made to a better design too.

 

[Chip-mk1]

Just fit an Audi or Honda engine. You get a decent box then.

 

[Craigie-B]

Just fit an Audi or Honda engine. You get a decent box then.

Yeah theres a guy on c16v with a 20vt conversion and has pics of the mounts on there so probably go that way in future.

that said a b18 would br novelty especially if the mini has 1 aswell

 

[Chip-mk1]

Audi lump is a good option as it fits a lot easier.
Honda is much more work.
I picked it for the extra revs though.