RB25 cam options - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

wowzers9930 · 03-05-2014, 08:25 AM

Im doing mild build on my rb25 which includes the usuals. I am however thinking about while I have the head off throwing in a set of cams. My HP goal is 450/500 so which cams would you guys recommend that would help improve my power band but also not require any aftermarket valvetrain parts. The only valve train parts im getting new are valve stem seals. I was looking at the tomei poncams 256 but are they really going to do anything for me or just cause valve float on stock valvetrain>?

Freddy intake mani
q45
hx35
750cc injectors
walbro 400 pump
head port and polished

*dbeiler* · 03-05-2014, 08:48 PM

The guys at RawBrokerage can provide excellent advice on anything RB related. Tomei Poncams are install and go. If you are running 15+ psi boost (I'm assuming you will be for 500 hp), they highly recommend using aftermarket valve springs to prevent valve float. Tomei Procams are more aggressive than Poncam but I believe they will require some head work. The bigger cam lobes won't have enough clearance to spin, so a metal grinder must be used to clear some space. Procams also require solid lifters.

03-05-2014, 08:25 AM	#1
wowzers9930 Leaky Injector Join Date: Nov 2012 Location: Pittsburgh PA Age: 29 Posts: 54 Trader Rating: (0) Feedback Score: 0 reviews	RB25 cam options Im doing mild build on my rb25 which includes the usuals. I am however thinking about while I have the head off throwing in a set of cams. My HP goal is 450/500 so which cams would you guys recommend that would help improve my power band but also not require any aftermarket valvetrain parts. The only valve train parts im getting new are valve stem seals. I was looking at the tomei poncams 256 but are they really going to do anything for me or just cause valve float on stock valvetrain>? Freddy intake mani q45 hx35 750cc injectors walbro 400 pump head port and polished

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

03-05-2014, 08:48 PM	#2
dbeiler Premium Member Join Date: Jun 2012 Location: Lancaster county, PA Age: 30 Posts: 465 Trader Rating: (4) Feedback Score: 4 reviews	The guys at RawBrokerage can provide excellent advice on anything RB related. Tomei Poncams are install and go. If you are running 15+ psi boost (I'm assuming you will be for 500 hp), they highly recommend using aftermarket valve springs to prevent valve float. Tomei Procams are more aggressive than Poncam but I believe they will require some head work. The bigger cam lobes won't have enough clearance to spin, so a metal grinder must be used to clear some space. Procams also require solid lifters.