club.liberty.asn.au

Hi guys,

I finally found someone who will actually custom make us some camshafts:
http://www.camshaftshop.co.nz

I called the guy and spoke to him about some cams for the ez30r motor. He's made up several sets before, but doesn't have any spare ones in stock. He said that we'd lose the AVLS system and quoted me NZ$3000+ ($2500+) for a set of four

the reason they are so expensive is that they have to be custom milled from scratch instead of from an existing guide or lobes.

it's also suggested that the valve springs and retainers are replaced (US$500 for a set from Supertech) to cope with the bigger lift and duration.

I asked about a group buy, and he said that unless 10 sets were ordered, he couldn't justify a reduction in cost. *shrug*

but at least we know that it's possible to get cams made up for our cars now...

i'd be hopeful of close to 200awkw with a set of custom cams, bigger injectors, intake, extractors, exhaust and a rull retune... and i'd also be hopeful of saying hello to the 12s... though that may be a little optimistic...

Hi Blaeven,

The trick with such a mod is that we need to do some serious research. Our cams are not off the shelf (not even in Japan) and therefore, no reliability data, no performance data and no wide development pool. What we need is some feedback from our NZ bretheren who have undertaken this mod to see what gains (performance, efficiency and economy) that have been realised.

In addition, did you mean that the AVCS is disabled?
1. How is that done?
2. Would that mean a decrease of the low down torque?
3. Negative impact on fuel consumption and emissions?

I have done some reading lately on the cams topic (this months feature, July 2010, in Fast Fours mag), and the general rule is that you can achieve in the order of 20% increase in power at the top end of the rev range, but you also need to be prepared for the compromised lumpy idle and loss of low rev torque.

Kind Regards,

Mark.

if they are a longer duration cam you will also loose more mid-range as well.
going to a none vvlt setup would probably require aftermarket ecu.

personally i think you would be wasting your money.
just run race gas and add timing and take out fuel.

vaccine wrote:if they are a longer duration cam you will also loose more mid-range as well.
going to a none vvlt setup would probably require aftermarket ecu.

personally i think you would be wasting your money.
just run race gas and add timing and take out fuel.

its a good point for the gains ... all the cam work with no VVT really is pointless if only N/A

i would love to see a tune using E85 ...heaps of timing can be added from what ive seen on turbo cars

i never mentioned loss of the variable valve timing, i'm referring to the variable lift (dual stage lift setup similar to VTEC) that the ez30r has. changing to aftermarket camshafts (as per a lot of high NA output honda setups) causes loss of this variable lift system (due to different cam lobes being ground into the shaft), meaning that yes, there would be a hit to the fuel consumption, a loss of lowdown torque and potential need (though not guaranteed, seen as the ez30r ecu can be tuned) for aftermarket management.

the variable valve timing is there, so it wouldn't turn the engine into an absolute bastard, but the whole idea of getting performance cams would be to give the car more top end power.

i'd be happy with a lumpy idle and loss of low down torque if it gave me another 25kw at the wheels (after a retune, seen as i have a vipec ecu)... don't know of many other 3 liter NAs that put down 170kw+ to all four wheels...

that'd give plenty of cars reason to tremble in their boots... especially seen as with "only" 145kw atw, my car gives modded WRXs and stock STi's a hard time...