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NickZ
Post #3403
this is the same type of motor and setup. |
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RA65CHARGER
Post #3408
whats with the rear suspension delazy? helper springs? |
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delazy
Post #3410
whats with the rear suspension delazy? helper springs? that dude with laptop is playing solitare i noticed that...unsure to be honest, first setup like that ive seen... is that bonnet purposely not aligned properly? yeh, dirty turbo toyota motors with high mount in small engine bay produce silly amounts of heat...rear is lifted slightly to try and get rid of the heat |
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delazy
Post #3412
except its proven to do nothing to help i dunno about that... ask all the local guys that were made remove the bonnet spacers at oz-drift GP...they all complained of suffering higher than normal temperatures... next event when they realised they were allowed to run them under Tassie regs not SA regs, they all reinstalled the spacers... same arguments happen regularly at SA events... |
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chvzding
Post #3413
Hmmm, interesting one. I would say that thermodynamically the heat would escape through the gap. The heat lost is equal to the heat energy, time, airflow, transient properties and space to flow through. You would probably find that any heat lost would be similar to Evo's running a standard lancer bonnet. The easiest way to test this would be to install several digital thermometers and hook them up to a laptop so we can compare the average under-bonnet temperature over time. Repeat without spacers and for the sake of there being a control group of some kind, without a bonnet at all. |
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delazy
Post #3416
DMAX tech drawing for the carbon bonnets they design/sell..origin also use the same concept in the bonnets they design and sell..both quite large companies..voltex who design alot of the aero for the serious time attack cars in japan, including the cyber evo run another similar design...not by lifting the bonnet, but a higher moulding at the rear most of the bonnet to allow air to escape...voltex do test all the aero in wind tunnels however... |
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Funz
Post #3417
i believe its to do with the airflow over the bonnet creating a low pocket of pressure at the bottom of the windscreen, which in turn i believe would create a circulation of air at that bottom point of window where it meats the bonnet and not allowing air to escape properly? kind of like the forward most point of a ute tray being less turbulant i think, havent done aero stuff since college lol |
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gsr093
Post #3418
Lazy think you will find the aero testing that cyber does has very little bearing on heat more so on downforce and resistance.....time attack for a lap or so has very minor issues with overheating. |
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delazy
Post #3419
certainly didnt mean for it to read in the way that it did scott... |
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Webbey64
Post #3420
Maybe the best thing is find what works for your car specifically, If it runs cooler whith spacers use them if it doesnt dont use them. It would certainly be interesting to see engine temperature averages over X amount of laps with and without spacers, aslong as the ambient temperature stays constant and also take an average laptime. Interesting!!! |
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gsr093
Post #3421
I do apologise ...AGAIN LOL....as once again may have possibly been sidetracked from the discussion? As far as temps go I have no ferkin clue!!..but I do know that cyber and sieera teams don't really have issue with temp problems and the don't resort to putting washers in the rear of their bonnet hinges |
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delazy
Post #3424
i always thought it was only useful if you had a vent/air dam/whatever you call it underneath the car, i allways thought the lj xu1's had that chrome thing under them for the same reason except they used shark gills to vent it out? , could be wrong ![]() i know a few guys are running bash plates these days...which would possibly cause the same scenario... |
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MookieMadskillz
Post #3425
With ronnie the bonnet spacers did keep under bonnet temps down i could tell by the coilpacks not breaking down like they normally did, |
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