Sorry, I was imagining you were removing the ducting on the front of the radiator that scoops air into it, but after re-reading I think what you're actually doing is removing the piece from around the fan on the back side of the radiator.
I don't think that shouldn't cause any difference in cooling.
I'm not entirely sure what John is talking about. Keep it to sub-sonic, in-compressible flow and you'll be alright.
2007 Solstice GXP
#3 ASP, DET and NWOR SCCA
"It's a Kappa - not a classic"
Last edited by phil1734; 04-18-2019 at 10:34 AM.