Cool? Warmer? I don't have a fluid heat riser, but I've always understood the point is to help warm the intake on those cold mornings. This is used when running headers because the stock bimetal flapper is removed. So, that being said it will get cooler via heat transfer by contact with the intake, but not to any appreciable degree. Just plumb it right off the hose and get after it, I think you'll be fine.
2010 4Runner Trail 3" Lift, UCAs, and 285 Goodyear Duratracs
1982 FJ40 Green 4" Rough Country Lift, RE-smogged, and getting better every day! (Mid - Resto)
email: adamkingf5371 at yahoo.com