SimonR Posted October 3, 2006 Share Posted October 3, 2006 Does anyone know the rate of flow of the stock water pump on the 2JZ? I'm trying to work out whether the 9 litres of coolant makes a complete circulation of the engine during one pass at the track. Link to comment Share on other sites More sharing options...
Digsy Posted October 3, 2006 Share Posted October 3, 2006 I should think so. Water pumps can usually flow well up into three figures of coolant litres per minute at full speed, so 9 litres should not take long to circulate even at an average engine speed. Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 3, 2006 Share Posted October 3, 2006 It'll make a lot of passes if it's a race track, on a 1/4 mile run though who knows.... The Yanks run drag engines with NO coolant, in fact they fill the blocks coolant cores with a type of concree to stiffen them. Link to comment Share on other sites More sharing options...
SimonR Posted October 3, 2006 Author Share Posted October 3, 2006 We're rebuilding my engine as a 1.5 JZ at the mo and when we took the rad out it was clearly knacked. I was wondering whether to upgrade (been advised to) but I'm thinking that it may be unecessary weight if the extra cooling isn't needed for drag. May do the odd top speed run or short handling course in the future. I'm thinking that a stock rad should do the trick? Link to comment Share on other sites More sharing options...
Digsy Posted October 4, 2006 Share Posted October 4, 2006 It'll make a lot of passes if it's a race track, on a 1/4 mile run though who knows.... The Yanks run drag engines with NO coolant, in fact they fill the blocks coolant cores with a type of concree to stiffen them. What about heat soak after the run? Or do they jusdt assume that the solid block has enough heat capacity to absorb everything? Do they run from stone cold every time? Link to comment Share on other sites More sharing options...
Kranz Posted October 4, 2006 Share Posted October 4, 2006 Depends on the engine rpm. At 4000 to 5000 I'd expect to be seeing 150 litres/min. The Mondeo diesel is 120 Lirtes/min at those speeds. The only way to determine what the flow is would be to fit a flowmeter. Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 4, 2006 Share Posted October 4, 2006 What about heat soak after the run? Or do they jusdt assume that the solid block has enough heat capacity to absorb everything? Do they run from stone cold every time? Don't think they warm them up much, the heat soak is catered for my the mass of material. drag racing, to me, is pointless, but I appreciate the spectacle and noise, but it ignores so many of a cars potential dynamics, there's so much hanging about for 10 seconds running, and the places the cars run are like a landscape from hell with facilities to match Link to comment Share on other sites More sharing options...
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