4 replies to this topic

[087dave]

Hi out there do 1:3:1 roller tip rockers work well on a 998 do there give high lift? or would you have to use them with a hot cam like a sw5 cherrs!!!!!!!!!

[Bungle]

big lift on a 998 kills power

if your after removing so power i would suggest fitting a 2 inch exhaust and some 8x13 wheels as well

[mike.]

Small bores can benifit massively from the right cam when coupled with a ported head and usual stage 1 kit.

IMO i think you'd be wasting your money on a set of roller tip rockers, especially 1:3:1 ratio ones. Any hike in power will be pretty small - Barely noticable i imagine.

In terms of BHP for your buck you'd be better getting a new camshaft (kent 276, 286 and MG metro cams work well on 998s) or a stage one kit if you haven't got one already.

Bare in mind most mods you do will require the car to be set up on a rolling road afterwards to set the timing, needle amd mixture to suit for maximum power and smoothness.

[lorry]

The original rockers are about 1.29 or something like that so there is not much extra lift. The roller tips may give smoother running though

[mike.]

Standard rockers are just under 1:25 ratio i think...