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13-01-2007, 05:38 PM
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FF.Com.Au Hardcore
Join Date: Apr 2006
Posts: 781
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is there any advantage to letting your car cool down between runs ?dose it increase your mph or drop your ET ?
thanks guys jake
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au2 s i6 5 spd , au series 1 xr6 hp motor, cam advanced 5*,jmm cai ,topgun leads,pacey 4480's,3 inch cat,lukey 2 1/2 sports zorst and 3.89 lsd,standard ecu. current best,14.939 @ 93.17. |
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13-01-2007, 06:25 PM
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Pit Lane
Posts: 11,867
 
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If the motor is allowed to get hot and stay hot, you get a heat soak in the motor, on a EFI motor there are sensors to pick up this sort of thing and when they do they will pull out some ignition timing and/or possibly add more fuel to stop pinging, doing this will reduce power but keep the motor safe.
The problem is worse on a forced induction engine as intake air temperatures rise under boost and if you start with warm air or warm components you will be loosing more power
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14-01-2007, 12:59 PM
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Hoon On The Rise
 
Join Date: Mar 2005
Location: Open Roads with Boost!
Posts: 9,924
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With ther Turbo's most guys will pop the bonnet and cool down for 60 mins or so before running again.... Too much heatsoak...
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21-01-2007, 01:46 PM
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Performance moderator
Join Date: Feb 2005
Location: St Clair..N.S.W
Posts: 14,875
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Take a few bags of ice and leave on inlet between runs...
This is where w2a intercooler help in theory, but a weight gain.... In this heat at present all cars are effected....
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Real cars are not driven by front wheels,real cars lift them!!... BABYS ARE BOTTLE FED, REAL MEN GET BLOWN. Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! Dart 330ci block turbo black pearl EBXR8 482 rwkw.. Daily driver GTE FG.. Projects http://www.fordforums.com.au/showthread.php?t=107711 http://www.fordforums.com.au/showthr...8+turbo&page=4 |
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21-01-2007, 07:55 PM
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Weezland
Join Date: Aug 2005
Location: Sydney,workshop mod
Posts: 7,216
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Mine did the best mph it ever did hot lapping (6 or so runs back to back)on a high 30c day, maybe the extra heat in the manifold helped with efficiency and so made more hp.
This is a carbed engine,and the motor was not one to get hot,even hot lapping only got water temps to 195f,I think EFI engines appreciate the cool down though.. |
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21-01-2007, 11:13 PM
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Performance moderator
Join Date: Feb 2005
Location: St Clair..N.S.W
Posts: 14,875
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Thought it could have been running a little lean and hotter ambient temps helped??...
__________________
Real cars are not driven by front wheels,real cars lift them!!... BABYS ARE BOTTLE FED, REAL MEN GET BLOWN. Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! Dart 330ci block turbo black pearl EBXR8 482 rwkw.. Daily driver GTE FG.. Projects http://www.fordforums.com.au/showthread.php?t=107711 http://www.fordforums.com.au/showthr...8+turbo&page=4 |
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22-01-2007, 05:32 PM
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FF.Com.Au Hardcore
Join Date: Apr 2006
Posts: 781
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thanks for the input,next time i'm at willowbank i'll let it cool off and see what happens.
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au2 s i6 5 spd , au series 1 xr6 hp motor, cam advanced 5*,jmm cai ,topgun leads,pacey 4480's,3 inch cat,lukey 2 1/2 sports zorst and 3.89 lsd,standard ecu. current best,14.939 @ 93.17. |
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22-01-2007, 05:50 PM
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Smile
Join Date: Dec 2004
Location: Merrylands Sydney
Posts: 8,540
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You will easily have another 6-10rwkws when cool compared to hot
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28-01-2007, 12:58 AM
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Your converter do this!
Join Date: Jul 2006
Location: Perth W.A
Posts: 545
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 Might be an interesting exercise to do a pass at different water tempeture's, to see where it will make it's most power, consistantly. Some motor's will make more power at a lower temp range say around the150 mark, some at 180. Every motor is different.
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cooling down between runs???
Linear Mode
