F4i Head Flow

[DaveC]

So, can anyone give us f4i cylinder head flowbench data we can use for Wave? We dont own a flowbench, so we're just going to have to pay someone to flow our head if one of you fine gentlemen here dont offer us the data. If it was something we can do, I wouldnt be asking, but we will learn nothing by paying someone for this data. Your help is greatly appreciated.

Even if you think I'm an idiot, its for the team, not just me. http://fsae.com/groupee_common/emoticons/icon_biggrin.gif

Thanks,
Dave

[John Lankes]

Normally I would be hesitant to give up test data, but since this board has helped me so much, I figure I can give a bit back. You can just mirror the forward flow coefficients for the reversion flow, and that should get you close enough. You will find that tinkering with the reversion coefficients will just offset your power curves for the most part, which should be fine for starting up your Ricardo models.

Stock intake, radiused inlet, corrected flow values, numbers on the left are L/d ratios.
Flow Coefficients
0.0856 0.2607
0.1283 0.3867
0.1711 0.5052
0.2139 0.6007
0.2567 0.6555
0.2995 0.6749
0.3422 0.6917
0.3850 0.7042
0.4278 0.7135

Stock exhaust, flowed with 1.375" OD - 8" pipe extension.
0.1000 0.3078
0.1500 0.4262
0.2000 0.5713
0.2500 0.6484
0.3000 0.7053
0.3500 0.7424
0.4000 0.7587
0.4500 0.7651
0.4875 0.8089