F7P Head Options

GasManLS7 · May 11, 2024

Got my Mk1 Valver project running today and it needs a head gasket doing. Whilst the head is off I'm considering tuning options. I don't think there's any point putting cams in for now as I will be building a monster F7 out of it in winter so will be building the bottom end and will no doubt need better cams to suit. Was i was wondering about though is the head itself. Will an F7R head drop straight on? I hear the megane F7R heads have the largest ports? Will it give any benefits? Or shall I just port the F7P head?

Any advice is much appreciated.

16v_paddy · May 13, 2024

The Megane heads have the biggest inlet valves at 33mm, they actually have smaller ports but this actually makes them flow a lot better.

The F7R heads drop straight on, they're nothing special or fancy as they're made from the same castings as the F7P's so all the water & oil galleries are in the same places etc

Matt Cup · May 13, 2024

GasManLS7 said:
Got my Mk1 Valver project running today and it needs a head gasket doing. Whilst the head is off I'm considering tuning options. I don't think there's any point putting cams in for now as I will be building a monster F7 out of it in winter so will be building the bottom end and will no doubt need better cams to suit. Was i was wondering about though is the head itself. Will an F7R head drop straight on? I hear the megane F7R heads have the largest ports? Will it give any benefits? Or shall I just port the F7P head?

Any advice is much appreciated.

Didn’t you have two pretty special engines for sale? Couldn’t you have turned one of those into a monster?

Also have you got a build thread up for your MK1?

GasManLS7 · May 13, 2024

Yes mate, both sold and building an even wilder F4R for my 182. Aiming for 270bhp NA. I believe the F7 might have more potential though, there's at least one I know of in Europe that has 330bhp NA and the Laguna BTCC were around 300bhp. No build thread but they're both on Instagram siddle_engineering

16v_paddy · May 13, 2024

GasManLS7 said:
Yes mate, both sold and building an even wilder F4R for my 182. Aiming for 270bhp NA. I believe the F7 might have more potential though, there's at least one I know of in Europe that has 330bhp NA and the Laguna BTCC were around 300bhp. No build thread but they're both on Instagram siddle_engineering

The problem with the BTCC engines is that yes they do make 300-320bhp but internally they're completely different to the normal F7R's and they only have a running lifespan of about 4 hours.

This is what the head on them looks like

The Clio & Megane Maxi cars were 270-180bhp depending on altitude

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F7P Head Options

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16v_paddy

Matt Cup

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