ebay let cam question

[Sloth]

right, following on fom andy's thread re: xe to let build, i found this on the bay. i always thought that it was the xe inlet that was fitted with lets, but this guy says otherwise?
http://cgi.ebay.co.uk/C20XE-exhaust-cam-4-C20LET-Nova-Corsa-Tigra-Astra-GSi-/270587093842?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f003f6352

[mowgli]

believing eBay is on a par with the other greatest lies ever told......ie. the cheque is in the post, my real name is nathan & i did send the parts, i won't come in your mouth etc

[Sloth]

and surely its the duration thats the important bit not the lift?

[Graeme]

Iirc Paul runs both xe cams in his yellow one

[Jon_nova1]

I was thinking the same as Graeme as NA usually has a longer cycle on both ends

[Stuart]

and surely its the duration thats the important bit not the lift?
depends how you design the cam.

its all about the effective open time, which can be done with a big lift std duration, or sd lift and big duration etc.


with turbos the key is no inlet/exhaust overlap, and then just getting the ******* valve open as fast as possible for as long as possible

[blue_peg_16v]

its the inlet you use as it increases overlap, exhaust one decreases it

[MK999]

but its decreased overlap you want in a turbo engine lol

[Stuart]

perhaps its that bit more opening time that helps, and you dial out the overlap with the venier etc.