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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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Sun Mar 27, 2005 4:37 pm |
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does anyone know if the laguna 2.0 16v F4R bottom end is the same as the clio 172/182 F4R bottom end?
Also i am led to believe that the clio F4R BE is practically the same as the willy/megane F7R BE... true or false? |
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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Mon Mar 28, 2005 5:05 am |
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well I would assume so as the only diff is the laguna lump isn't vvt. Dunno for sure though but I would say aye. |
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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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| Posted:
Mon Mar 28, 2005 6:14 am |
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thats what neil on RSC said.
If the F4R BE is basically the same as the willy/megane F7R BE, could i not just put bigger inlet valves (like stan's) in an F7P head and whack it on a cheap laguna F4R BE, and voila, basically have an F7R?  |
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jimbo
Level 7 User
Joined: 27 Feb 2004
Posts: 243
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Mon Mar 28, 2005 8:52 am |
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accodring to nick hill, the oil and water ways of a f4r bottom end r different. he tried matching up a F7P head with a f4r/172 bottom end. no go
jimbo |
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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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| Posted:
Mon Mar 28, 2005 8:54 am |
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d'oh
would have been too easy eh? |
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BenR
Level 5 User
Joined: 18 Jun 2004
Posts: 114
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Tue Mar 29, 2005 2:47 pm |
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oil returns on 7's and 4's are on opposite sides, and water ways are totally diff shapes and placements. |
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Neal
Forum Moderator
Joined: 18 Feb 2004
Posts: 7432
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Tue Mar 29, 2005 2:53 pm |
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thanks Ben
why cant renault just give us a little something we can work with?  |
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BenR
Level 5 User
Joined: 18 Jun 2004
Posts: 114
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Tue Mar 29, 2005 3:55 pm |
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they have......a whole ready built 2ltr lol. |
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Chet T16
Retroholic
Joined: 12 Feb 2004
Posts: 5685
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Tue Mar 29, 2005 6:16 pm |
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Neal, do you not know by now that bens keyboard is missing 3 letters
D
I
Y
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Chris H
Forum Moderator
Joined: 02 Mar 2004
Posts: 19978
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| Posted:
Wed Mar 30, 2005 12:24 am |
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I have to ask why not just get the lag bottom end and whack a 172 head on it? Or why not just use the laguna engine whole and sort the head out.
Could do with some pokier cams I'd imagine though. |
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BenR
Level 5 User
Joined: 18 Jun 2004
Posts: 114
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Wed Mar 30, 2005 3:19 am |
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Not looked at laguna heads, but i assume they are based on the square port turbo head casting, which isnt that great.
The progression of cylinder head port design through the 172/cup/182 castings means that they are very different. On early 172's the heads are based on the larger port sport casting, with cnc machining on both inlet and exhaust ports. This is the more efficient of all the heads. They then moved to the turbo casting with square and 40% smalled exhaust ports with no cnc machining in them, only the inlets. The flow sucks on them, but inlet flow is good as they revise cnc machining every time i see a later one. the 182's carry the turbo casting and would make much more power with the 182 manifold on the old sport casting.
no idea why they did all of that.
but they raised the port floor on newer castings, with better cnc on the short side. |
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jimbo
Level 7 User
Joined: 27 Feb 2004
Posts: 243
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Wed Mar 30, 2005 8:43 am |
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or use the n series engines fitted to lagunas and safranes. these are the newer 16v all ally engines and they bolt up directly to the jc5 using the correct bell housing. t4 2litre turbo any1? mmmmmm
jimbo |
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