Meggy and willy cams

[andyr5fun]

Anyone know the difference between Megane and Williams f7r cams? Are they interchangeable?

[volymmannen]

Yes, megane has the mildest cams and willy the wildest, but not much.

[tutuur]

No, megane doesnt have a key for the distributor

[volymmannen]

No, megane doesnt have a key for the distributor

then explain this, the right one is a meg cam if you look at the pulley http://i55.photobucket.com/albums/g159/volymmannen/DSC00440.jpg

[tutuur]

oh sorry, i thought it didn't...

is the left cam a williams cam? if so there is a hugh difference! :shock:

[volymmannen]

not willy

5502209
INTAKE EXHAUST


clearance [cl] 0.00mm 0.00mm
duration [0.1mm+cl] 286° 286°
duration [1.0mm+cl] 246° 246°
valve lift [cl=0] 10.65mm 10.65mm
REQUIRED PARTS
cam lift - -
peak angle 110° 110° followers: O.E.M.
timing [1.0mm+cl] 13/53° 53/13° retainers: O.E.M.
lift at TDC [cl=0] 2.50mm 2.45mm springs: O.E.M.

[Bigfoot]

anyone got the spec of a willy cam?

[tutuur]

lol, i want to know that too!

http://williamsclio.co.uk/forum/showthread.php?41533-Williams-vs-16v-cams

[sthom]

These are the measurements of a very respectable french company which manufactures camshafts.

http://img528.imageshack.us/img528/7338/profilsaacf7oem.jpg

So for F7P it is 268/261 with 9.28/8.54 lift and for F7R it is 274/264 with 9.87/9.25 lift.

Of course there are and other things that effect performance such as lift at TDC,lobe angle,etc...

[volymmannen]

These are the measurements of a very respectable french company which manufactures camshafts.

http://img528.imageshack.us/img528/7338/profilsaacf7oem.jpg

So for F7P it is 268/261 with 9.28/8.54 lift and for F7R it is 274/264 with 9.87/9.25 lift.

Of course there are and other things that effect performance such as lift at TDC,lobe angle,etc...
Link doesn't work anymore, would be nice to get it to work again.

[tutuur]

Values are probably at zero lift too btw, otherwise performance cams aren't really needed...

however it's a good guide to see the difference!

[volymmannen]

yes but its still a difference. I have got hold of willy cams so i will try them in our megane and see if they make any gains, got 149,7 hp and 187,7Nm stock, i dont think i try the willy cams in a standard head because i have a spare one that i will do some magic on and i dont want to change cambelt twice if i only change cams first and then the head.
So any power gains will be with willy cams and ported head i think,but i would like to see what only cams do so i haven't decided yet.

[tutuur]

Curious on the outcome :)

[tutuur]

link is working again, still toying with the thought of altering cam timing on my Turbo'd F7r. need me some verniers!

did anything with the head yet mate?

[16v_paddy]

Missed this one, if it's of any help, exploding_penguins car, Valver with full megane engine & wiring, freshly rebuilt with williams cams fitted made 165bhp & 147ft/lb. No mapping or any other mods apart from exhaust.

I'm not sure what I'm doing just yet but I've got a catcams 213 inlet cam with pulley and the pulley off the exhaust cam that's damaged but may still be useful. Would you be interested in buying them?

[tutuur]

Seems like a good number from the engine!

could you send me some pics paddy? I would be helped with one pulley too!

i'll send you a PM with my details :)

[mack1]

Why would very similar engines producing similar power but the meggy has milder cams. What is the difference.?

[16v_paddy]

Why would very similar engines producing similar power but the meggy has milder cams. What is the difference.?

The head itself, smaller ports which speed up the gases entering the head coupled with the bigger 33mm inlet valves is what makes the big difference. It's basically much much more efficient that the williams head.
Renault most probably went with a milder cam profile to keep in line with emissions regulations or something like that