DRC 7 Cam

hobot said:

lain do ya have info on the CR in your lack of low rpm torque set up?

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hobot,
rather belatedly, we think the old HPI modified RH4 head was up to around 10.5:1 compression ratio.
Pity i hadn't done a dyno run with the old cam and RH4 head.
iain

Thanks Lain, Ms Peel ended up at 10.25 CR with .020" JSM gasket to avoid Norris D cam valve piston clash. May work better with DRC 7 or other similar profiles than Norris D on this kind of lowish CR. May live long enough to find out best compromise for no boost to low boost.