>Is a F3 radiator a good upgrade for a Hawk ?

"Somebody should answer this. There is a BDTech F3 Adapter kit, been in testing since last summer. The rathawk would choke and puke at track events early last summer, very unnerving to say the least. His Hordliness suggested an F3 rad, and what he says, we do. It's a little wide, okay, a lot wide at 16 inches, 2 wider than a stock hawk rad. But it's about the same height, so it fits, and has a similar top end mounting, which the F2 rad doesn't. We've never even put the fan on, it runs so cool engaged in extended stop and go traffic, that we feel as cool as Papa Bear Selden, the temp gauge barely moves up. And running on the track, at speed, cool as a cucumber, and no more choke and puke in the pits, no more gargley is my head gasket blown type sounds. F3 rad: 16x8x1 inches; stock hawk rad 14x7.75x 0.5 inches. The only number you need look at is the thickness, the F3 rad should have twice the cooling being twice as thick.

The best reason for using the rad is that they are cheap, there were a number of them on ebay last week, don't all you go fight each other for them and drive the prices up. Does not require a plumber friend to rearrange one of the spigots, like the narrow Magna rad is supposed to. Drawbacks: the width, you might knock over some kids waiting for the bus, if you don't watch your lane positioning, supposedly doesn't fit with hawk appropriate narrow bodywork, and crashworthiness. It sticks out wider than the cases, what do you think is going to happen?"