F7P F7R and all that...

Level 1 User Joined: 20 Jan 2006 Posts: 38

Can any one tell me the difference between the two engines other than cc difference, like can a 1.8 head be put on a 2.0 bottom etc.. any info would be gratefully appreciated thanks Smile

Site Subscriber Joined: 07 Oct 2004 Posts: 2281

Right, normally you'd get told to use the Search function as this has all been covered a million times before but because I'm nice I'll cover things briefly for you....

I assume you're wanting to know this info in planning an engine conversion yeah?

F7P is the 1.8 16v engine found in Renault 19 and Clio 16v's.

F7R is the 2.0 16v engine found in the Williams and Megane Coupe (the Williams is coded F7R-700 and the Megane version coded F7R-710)

The bottom end from a Williams will slot onto a 1.8 cylinder head, however the bottom end from a Megane will require you to use the 1.8 flywheel.

Although the Williams and the Megane make the same power, the Megane engine is better because of the smaller ports it has (cannae remember why though!)

Williams engines fetch a lot more in the ads purely on name value, although they are more 'plug and play' friendly than the Megane.

If you want to use a complete Megane engine in your Mk.1 Clio or a 19 then you'll need to do one of three things:

1. Fool the Megane ECU into thinking there's no airbag or immobiliser present
2. Fit the Megane dashboard to utilise the loom without problem
3. Machine the Megane cylinder head to accept a distributor cap

I think the majority of that is right but there's plenty of others on here who will correct me if I'm wrong!

There's two chaps I suggest you speak to - Mick (goes under the forum name 'MicKPM') and Stan (stan) who have both used the Megane engine but Mick followed route 2 above while Stan has gone down route 3.

Hope this helps mate.

Level 1 User Joined: 20 Jan 2006 Posts: 38

thanks very much for your help Smile

Site Subscriber Joined: 07 Oct 2004 Posts: 2281

That's what we're here for! Very Happy

Gay Rights Activist Joined: 07 Apr 2004 Posts: 1268

my name is Craig.....u not got that yet Ben?!!

Site Subscriber Joined: 07 Oct 2004 Posts: 2281

It's easier to call you Stan lol

Site Subscriber Joined: 07 Oct 2004 Posts: 2281

Plus I know two Craig's who have 2.0 throttle bodied Clio's so that doesn't help Razz

Site Subscriber Joined: 13 Oct 2004 Posts: 4722

the question that arises now is....

whos stan?

mind you, im not roger so..

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

Craig Stanley

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

Your name is Craig... if you called yourself Craig on the forum there would be no problem, it's your own fault Razz

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

i still call him stan to his face....cant shake it.