megane 16v

[dhay14]

I believe there are a few mods to be made to the megane 16v head if you wanna run the valver/williams intake mani and run a dizzy...

can anybody has pics or give me a confirmation on that plz ..

reg

dhayrone

[dhay14]

anybody got an idea on this?

[Wobba]

Just use a valver head with bigger valves.

Otherwise its a case of machining dizzy into place and machining out the ports as well as they will be a different size to standard inlet.

Probably some other stuff I cant remember as well.

[whitneyd]

Whats the difference between the Megane head and intake and the Williams head and intake?

[Wobba]

Smaller ports on the Megane. Ifyou go look at some ebay engines you can see the different intake manifold design and they use a different throttle body, therefore you would also need Megane ECU or better I believe...got one here actually :roll:

[Laine_16v]

You wont be fitting a valver/williams inlet manifold on a meganne head anytime soon.

[whitneyd]

All right so far I've gotten that the F7R blocks are all the same. The Megane head has different intake port shapes and valve body but the valves are 32mm like the Williams. The valver has the same port shapes as the williams but different valve sizes. Am I missing any other info? Sorry but I'm just getting into the 16v stuff I've been doing the C type for a while.

[Laine_16v]

The meganne head run's a dizzi'less coil pack setup.

[dhay14]

all the fact so far

megane has 33 mm intake valves - williams 32mm - valver 31mm

megane uses coil pack - williams & valver dizzy and seperate coil setup

megane has smaller intake ports - valver and willie the same type of intake manifold

megane has a 60-1 pattern flywheel with 210mm clutch - williams/valver uses a double 31 pattern flywheel with 200mm clutch iir

bottom ends are the same on the F7R's

are these correct and am i missing anything?

[Laine_16v]

215mm clutch *
60-2 trigger*

And the bottom end has some other better feature such as integrated sump seal (i think) and chain driven oil pump

[dhay14]

tnx...

so the only thing i need to do is having them machine the intake ports to match and machine ti fit dizzy and im good to go?

[whitneyd]

You cant machine the megane head for the williams intake. There are pockets in between the ports that get in the way.

[whitneyd]

http://img.photobucket.com/albums/v11/whitneyd/IMG_3149.jpg
Here is a pic of the Megane head with the Williams gasket. You can see the two pockets behind the 1-2 and 3-4 ports that will intersect.

[Wobba]

The Megane chain driven oil pump is better, you will need a different pulley to that on the Willy block as it does not use the pulley to drive the oil. I think you get it as part of the Meggy 714 cambelt and pulley kit.

[Wobba]

Seriously, just save the Meg head for ITB's or something and use it properly.

Just get a valver/willy head for sod all and mod it to fit bigger valves and use a 714 bottom end with better oil pump and whatever flywheel you need for the type of ECU you are gonna use.

[dhay14]

im running a willie lump on turbo atm and was about to mod the meggy head to use. in this case ill just take the valves out and mod a valver head to fit the bigger valves...

just to be sure the bottem end is identical to the willie lump apart from the oil driven oilpump yeahh..?

tnx mates.

[hamloin]

Another question regarding megane heads ect

has anyone fitted the valver cam and valve gear to the megane head as the valvers have better springs and cam.

I realise i will have to grind the dizzy bit off the valver cam,
-are the cams the same diameter
-are the buckets interchangeable

[robi1000]

Also F7R 714 (later meganes) has lighter conrods (they look a bit thinner). All in, I think 714 is about 6kg lighter then 700 or 710 block. There's a lot of small modifications that Renault did over the years, so buy the newest block you can find.

[Wobba]

yes, apparently it is lighter. The vanes on the outside are different.

[whitneyd]

You don't have to grind the valver cams they're all the same on the end. I'm sure the valver cams are better than the Megane but think the springs are the same.

[volymmannen]

215mm clutch *
60-2 trigger*

And the bottom end has some other better feature such as integrated sump seal (i think) and chain driven oil pump
F7R-714 has chain driven oilpump
F7R-710 is like williams and F7P

[volymmannen]

Also F7R 714 (later meganes) has lighter conrods (they look a bit thinner). All in, I think 714 is about 6kg lighter then 700 or 710 block. There's a lot of small modifications that Renault did over the years, so buy the newest block you can find.
i think that my 710 conrods looks really thin if i compare with My F7P rods

[hamloin]

ok so next question. what is the lairyest cams people have used on the standard valve gear and not had problems.

[Laine_16v]

Youd be looking at something like Catcam 5502213 or Piper 285.

[hamloin]

sweet cheers do u have any idea how good they are and what sort of gain i could expect. i have itbs mega squirt and 167bhp atm