Explained very well. Cant wait for the upcoming videos. Very curious how you tie the inlet into the body work. are the heat exchangers in the trunk now radiator and intercooler? Are there other coolers? Where is the fuel cell going?
I do wonder if you could conceivably do a sidepod style cooling setup. Of course it would have to be limited to just one side with how your cars driving position is but you could get a lot of mass flow through there. I think overall the rear mount is probably a better game. (Also as you said with time attack cars runs are often very short so I’ve wondered why we haven’t started to see intentionally undersized cooling with using dry ice and extra large water tanks etc. It’s much easier to package for both aero and mechanical grip than big coolers and should be able to be capable for 1-2 lap runs)
We also ran extra electric water pumps to cycle the coolant at a higher flow rate. Running a larger radiator or larger volume of fluid proportional to the engine water pump flow rate hides the problem, but as you explain it adds weight as each litre of coolant is extra kg. Plus you multiple the water hammer effect with the rear mount radiator being to big under G. We ran ours behind the rear tires, like a lambo after going with the original in the boot that blew the water pump. As we could flow the coolant independently of engine speed.
Yes. I know that that mid-engine cars with the radiators up front can get cavitation at the pump. Factory pumps were just not designed to move this much water mass.
Yes with mid/rear engined cars the G under braking isn't as bad as it's pulling from the pipe. But the rear mounted acts like a trebuchet if you pull 2-4g under braking having the same size radiator volume, pipe diameter, angle all multiplies your problem. If you build it to not break at that load, then you lack flow the rest of the time. Hence our switch to a reservoir then t off multiple stages, like fuel it's easier to stack systems and switch a pump on at temp and then increase flow rate/fan speed, then open another or a third if required as you will know the envelope of the system better.
If only Bernoulli could see just how crucial his principle still is centuries later. It shows up in soooo many different automotive systems.
his family makes a decent pasta
Thanks for sharing
Explained very well. Cant wait for the upcoming videos. Very curious how you tie the inlet into the body work. are the heat exchangers in the trunk now radiator and intercooler? Are there other coolers? Where is the fuel cell going?
very cool work you are doing...
I do wonder if you could conceivably do a sidepod style cooling setup. Of course it would have to be limited to just one side with how your cars driving position is but you could get a lot of mass flow through there. I think overall the rear mount is probably a better game. (Also as you said with time attack cars runs are often very short so I’ve wondered why we haven’t started to see intentionally undersized cooling with using dry ice and extra large water tanks etc. It’s much easier to package for both aero and mechanical grip than big coolers and should be able to be capable for 1-2 lap runs)
We also ran extra electric water pumps to cycle the coolant at a higher flow rate. Running a larger radiator or larger volume of fluid proportional to the engine water pump flow rate hides the problem, but as you explain it adds weight as each litre of coolant is extra kg. Plus you multiple the water hammer effect with the rear mount radiator being to big under G. We ran ours behind the rear tires, like a lambo after going with the original in the boot that blew the water pump. As we could flow the coolant independently of engine speed.
Yes. I know that that mid-engine cars with the radiators up front can get cavitation at the pump. Factory pumps were just not designed to move this much water mass.
Yes with mid/rear engined cars the G under braking isn't as bad as it's pulling from the pipe. But the rear mounted acts like a trebuchet if you pull 2-4g under braking having the same size radiator volume, pipe diameter, angle all multiplies your problem. If you build it to not break at that load, then you lack flow the rest of the time. Hence our switch to a reservoir then t off multiple stages, like fuel it's easier to stack systems and switch a pump on at temp and then increase flow rate/fan speed, then open another or a third if required as you will know the envelope of the system better.
Very interesting. Can you tell what kind of core are you using, fpi?
This is good stuff, thank you
Looking forward to see what kind of aero gain you get, and what are changes you guys will make to the front for more DF.
Is there any chance we can get more information about the rocket anti-lag?
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why do you guys run a trunk spoiler or duck tail with the frame mount wing ?
The fastest time attack car, the rp968, has it mounted in the front horizontally.
What are you doing for intercooler?