catcams valve springs

[en035]

Thinking about getting these, what are the cons and pros? anyone using them?



Clio 172

http://www.catcams.be/datafiles/docs/springsetup55024xx1.htm

RENAULT Clio RS O.E.M. parts CUSTOM parts / SPORT
[2.0L 16v dohc rprh]
IN EX IN EX

upper retainer O.E.M. O.E.M. O.E.M. O.E.M.
lower retainer O.E.M. O.E.M. O.E.M. O.E.M.
valve spring O.E.M. O.E.M. E99862 E99862
valve seal O.E.M. O.E.M. O.E.M. O.E.M.


fitted length / load 36,0mm / 20kg 36,5mm / 18kg 36,0mm / 32kg 36,5mm / 30kg
max. allowed lift / load 11,0mm / 67kg 11,5mm / 67kg 12,5mm / 82kg 13,0mm / 82kg
lift at spring coil collision 12,0mm 12,5mm 14,5mm 15,0mm
lift at retainer - valve seal collision 13,5mm 14,0mm 13,5mm 14,0mm

 

[franx]

Alper, is your setup giving you problems ? The C&B's running too high rpm's ?

 

[en035]

Nope, thinking about an upgrade to indv. throttle body and forged pistons. For Colombo's std internals are more than enough unless you won't pass 8300 rpm limit.

 

[edde]

Nope, thinking about an upgrade to indv. throttle body and forged pistons. For Colombo's std internals are more than enough unless you won't pass 8300 rpm limit.

Stock internals won't last at 8k let alone any more long term its other bolts etc you need to think about though

 

[ditz]

what lets go first in these, rod bolts ?

 

[en035]

Nope, thinking about an upgrade to indv. throttle body and forged pistons. For Colombo's std internals are more than enough unless you won't pass 8300 rpm limit.

Stock internals won't last at 8k let alone any more long term its other bolts etc you need to think about though

ARP makes rod bolts for F4R, though not certain about the cylinder head one's.

So nobody got uprated springs?

 

[sideways danny]

Stock internals won't last at 8k let alone any more long term its other bolts etc you need to think about though

ARP makes rod bolts for F4R, though not certain about the cylinder head one's.

So nobody got uprated springs?

fitted a few sets. Stronger valve springs are intended to prevent the valves floating when using cams with high lift and fast ramp and decline rates at high RPM (ie valve bounce)

 

[stan*]

or simply: they help control valve movement more acurately at higher engine speeds.

They are also required when std items become coil-bound near full lift.

 

[stan*]

oh and did you get the pics of that head Danny?

 

[sideways danny]

oh and did you get the pics of that head Danny?

nope, hurt my back monday night. I'm flat out in pain

 

[Mark One]

standard setup is good for pretty dirty cams unless you want to raise the rev limit

 

[stan*]

oh and did you get the pics of that head Danny?

nope, hurt my back monday night. I'm flat out in pain

ok,,,,remember, im right until proven wrong