Yes, they are pretty "old school" but given the constraints of engines mission and the need to make them inexpensively - they aren't all that bad. (a little fingernail on blackboard shudder when I say that)You've never looked at the head design of these things, have you? I've seen better ports and chambers in 70 year old engines.
Look up CATs water diesel. Diesel emulsified in the water.Look up the new BMW water injection
I saw a good one. Scrutineers took almost a whole season to work out the nitrous was in a moulded bonnet reinforcing rib.I believe when the Unlimiteds used nitrous, they would spray in the turns. Short bursts to better the lap average not pure speed.
Of course the classic auto nitrous cheat was drilling holes on the roll cage or frame, building a chamber in the frame for the nitrous. Then trigger it and have it flow through the frame into the engine compartment. Not precise but cheating is racing.
^ This. Has a need for additional cooling even been shown to be necessary? Fixing a demonstrated problem is one thing, but chasing "worries" is quite another.One thing to remember - adding water injection is adding a potential failure point.
Especially with fine-mist nozzles, any dirt or "hard water" buildup can reduce the flow and thus cooling.
I'm not saying it's a bad idea, just that if water injection is required for take-off / climb power, it's one more thing to monitor.
None that I know of..........which means little. I'm still just at the box of parts stage with my conversion.Has a need for additional cooling even been shown to be necessary?