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Cat Cams 421s using OEM timing

M

mechanics70

Car  Clio rs 2 ph1
Buonasera. Ho una 172 Ph1 e ho installato delle camme Cat Cams 421 usando la fasatura OEM (con l'attrezzo "a ferro di cavallo") perché ero preoccupato per il contatto tra valvole e pistoni; dopo la rimappatura, ho raggiunto 181 CV. Qualcuno ha provato a usare l'attrezzo Gr. N, che anticipa l'aspirazione e ritarda lo scarico, o ha provato a fasare le camme in modo diverso? Grazie in anticipo per le vostre risposte.
 
“Good evening. I have a 172 Ph1 and installed Cat Cams 421 using the OEM timing setup (with the "horseshoe" tool) because I was concerned about valve-to-piston contact; after remapping, I achieved 181 hp. Has anyone tried using the Gr. N tool—which advances the intake and retards the exhaust—or tried timing the cams differently? Thanks in advance for your replies.”
 
Hi, I believe the 421s need the timing adjusted to run effectively and unlock the power gains;

The Cat Cams 421 profile (part number 5502421) for the Renault Clio 2.0L 16v F4R engine requires setting the valve lift at Top Dead Center (TDC) to 0.65mm for the intake (with VVT disengaged) and 1.75mm for the exhaust.

@NorthloopCup or @Brigsy or @YorkshireKyle will know.
 
Ciao, credo che gli alberi a camme 421 richiedano una regolazione della fasatura per funzionare correttamente e ottenere l'incremento di potenza;

Il profilo Cat Cams 421 (codice 5502421) per il motore Renault Clio 2.0L 16v F4R richiede un'alzata valvole al Punto Morto Superiore (PMS) di 0,65 mm per l'aspirazione (con VVT disattivato) e di 1,75 mm per lo scarico.

@NorthloopCup, @Brigsy o @YorkshireKyle sapranno sicuramente darti maggiori informazioni.
 
Ok, ma usando l'attrezzo Gr N dovrebbe dare un maggiore incrocio, cioè ritardando lo scarico e anticipando l'aspirazione, la mia paura è il contatto tra valvole e pistone.
 
Okay, but using the Gr. N cam should result in greater overlap—meaning it delays exhaust opening and advances intake opening—so I'm worried about valve-to-piston contact.
 
So, by calculating the overlap values (0.60 mm intake and 1.75 mm exhaust), I can install them, and the VVT will then bring the intake value to 2.30 mm when active. Is that correct?
 
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