rockers
Turbo Mini Forums

would it do the same job if i left the standard metro turbo cam in and put 1.5:1 or 1.7:1 rocker in, compared to putting a phase 2 cam in and left the 1.3:1 standard rockers.

If in Doubt, go flat out !!!

It has alot to do with cam timing and duration not just all out lift....

I'd personally give it a go with the 1.5's.

JF.

give it a go like john says but.....

i went down this route with 1.5 on a standard cam and TBH it was useless compared to the phase 2 on 1.3s

the difference was immense!...

the phase 2 cam is in a dimension all on its own,

i & others cant recommend this cam highly enough!

Its that good!

One well known Parisian turbo expert quoted this cam as a
“HUNGRY LION” & he is not wrong!

that has made up my mind in going for a phase 2 cam.has any body tried the phase 2 cam with 1.5:1 rockers and what about the phase 3 cam any good?

If in Doubt, go flat out !!!

Use the phase 2 with 1.3 rockers you will not be disappointed................

the phase 3 is a touch to radical and power losses of 30 hp have been seen on some high boost engines.

by just fitting this cam

the phase 2 with 1.5 rockers makes a tad more only on the top end rpm limits

but with a turbo you dont have to rev the engine much over 6000rpm anyway

so stick with 1.3s buddy like tom says

as a note avonbar do a phase 2 next genaration cam please enquire about this and let us know

regards ben

I've tried 1.5 rockers on a standard cam, 1.5 rockers on a P2 and 1.5 rockers on a P3.

I wouldn't really bother fitting 1.5's when the standard cam is in place, i only noticed a slight improvement, and they cost almost 3x the amount of a decent camshaft.
The P2 is certainly an excellent profile, pulls well from low down and produces the goods power wise.
P3 is more "agressive" with less power low down, though from "seat of the pants" driving, my engine feels slightly stronger with this cam fitted, though drivability is compromised.
To be honest I would fit the P2, as this is more tractable and doesn't seem to be a restriction when big power is sought.

Phil.

WWW.TURBO-MINI.COM

avonbar recomend with the phase 2 two use 1:3 ratio rockers... imho i would save and get full roller rockers, as apposed to the roller tip as they are stronger and the bushes are replaced with bearings

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MikeRace, Mini13

Yes funny enough i did think about getting some 1.7 rockers, but the wear on mine now is bad enough so that put me off.

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The wear on your what?
Why would 1.7 make wear worse?
The problem with 1.7 is the pushrod flex. MED and Calver combined have come up with new shorter pushrods and new followers to suit, combined with their new rockers which dont flex either may over come the problem. But i think the new rockers only come in 1.5 so bollocks anyway
Paul

I seriously doubt it!

MFT, the problem with full RR is that if a bearing fails then it changes drastically, if a normal plain bearing fails then it goes gradually over time and easier to correct...

I've gone for half roller rockers

My rockers are plain bushed shaft with roller tips also........

They are also 1.5:1, as I have them. However they may get swapped for 1.3:1 at a later date.

i can see you holding the spanners now tom
& undoing the rocker nuts .....lol

We'll see...........

plus they will wear out the cam lobes and followers bloody damn quick if you aint carefull

always looking for them bigger bunches of bannanas

Odd, I have 310 scatter cam and I shimmed springs to up the pressure. This is why I run x-drilled billet cams. Only worn out 1 in 6 years which was a 296 Kent, their hardening aint as good as Piper so they made my 310
Paul

I seriously doubt it!

iain here what u r saying mate, but my scource was saying that the gradual wear puts offset loads onto the valves... with full roller rockers the load is distributed properly therefore the load is evenly placed on the main bearings with extends life of the bearing....i take your point on board, but i have seen half roller tip failures, but am yet to see a full roller rocker setup failure....touch wood....all engines have been full race and not road use. so have been super abused each to mtheir own, but i will be using full roller rockers

Richie

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MikeRace, Mini13