I'm wanting to use additional bonnet vents (the car normally has a FRST bonnet on....standard bonnet was just grabbed in haste!) so I don't have to use bonnet blocks. I think they ruin the look of the car That info's interesting though....not the sort of temps you want around the inlet are they?!!

I should mention...that is a Forge recirculating dump valve, not a noisy atmospheric one...and after the first gentle run out I pulled it off and plugged it! Chatter was so much nicer

Wes - My thoughts precisely. Got air moving backward and upwards after entering through the bumper, so forward facing bonnet vents would force air down onto air already rising.