Silly engine heat reduction idea
Discussion
Even in my previous cars, Ive often intentionally driven with the heat turned up to full, directing it to vents that i point out of an open window, except for the few hot summer days we get here where it would be uncomfortable.
My logic is that by doing this I'm helping to pull some of the heat away from the engine's coolant system, especially in heavy traffic where theres not much airflow hitting the radiator (I know the radiator kicks in when necessary, but even still)
Would the amount of heat i can dissipate through the venting system make any recognisable difference I wonder? or am I just a loon
My logic is that by doing this I'm helping to pull some of the heat away from the engine's coolant system, especially in heavy traffic where theres not much airflow hitting the radiator (I know the radiator kicks in when necessary, but even still)
Would the amount of heat i can dissipate through the venting system make any recognisable difference I wonder? or am I just a loon
yay im not alone in my thinkings. but my peabrain pulsated even harder, and came up with the idea that you could somehow duct the aircon into the air intake to cool intake temps, and that the gain would be more than that which the aircon takes from the engine? this one seems a bit less feasible though!
AlVal said:
yay im not alone in my thinkings. but my peabrain pulsated even harder, and came up with the idea that you could somehow duct the aircon into the air intake to cool intake temps, and that the gain would be more than that which the aircon takes from the engine? this one seems a bit less feasible though!
You are right with the first one, it really does take heat out of the engine. Try it with the windows closed if you want to know how much heat it removes!I presume this second idea is a psii-take, mind...
JensenA said:
Been watching this thread and putting off replying, but I don't think I've ever read so much nonsense! In my car if I am stuck in hot traffic, the temp goes up, the fans cut in, and the temp goes back to normal. No fuss no drama.
Agreed. When the coolant system is working right you don't need to do this.Nonetheless, the air heaters do take their heat from the coolant system, and you can drop the engine temp in this way. Useful tip if your hoses get porous and you want to limp home...
Billy_rfc said:
Christ reading this you'd think you were running a £50 banger trying to make sure the rusty pile of crud didn't cook itself! If the cooling fans are running and doing there job then whats the problem?
If your worried about the temp get some heat wrap for the manifolds.
Billy.
£50 bangers are not the only type of vehicle whose engine heat needs watching, and everything you can do to reduce it helps, right? don't many cerbera owners already make amendments to the radiator fan system to get it to cut in sooner etc out of fear of coolant system temps going too high?If your worried about the temp get some heat wrap for the manifolds.
Billy.
Heat wrap for the manifolds? cerbera manifolds are prone enough to cracking without trapping all their heat into them with heat wrap, this would surely push the manifolds beyond their temperature tolerances and make them crack even more quickly. Show me any manifold manufacturer that guarantees their product after heat wrapping...
Water wetter and ceramic coated manifolds seems the way to go, though neither of thses are needed if everything is in good nick.
Running heater on full bore in traffic seems a bad idea to me, you'll start to drain the battery. Only ever done this when there was something else wrong with my car. That car cost me a fortune in repairs from not finding and dealing with the cause.
Running heater on full bore in traffic seems a bad idea to me, you'll start to drain the battery. Only ever done this when there was something else wrong with my car. That car cost me a fortune in repairs from not finding and dealing with the cause.
grumbledoak said:
JensenA said:
Been watching this thread and putting off replying, but I don't think I've ever read so much nonsense! In my car if I am stuck in hot traffic, the temp goes up, the fans cut in, and the temp goes back to normal. No fuss no drama.
Agreed. When the coolant system is working right you don't need to do this.Nonetheless, the air heaters do take their heat from the coolant system, and you can drop the engine temp in this way. Useful tip if your hoses get porous and you want to limp home...
I thought about making up some heat shields with some aluminium offcuts and a couple of plumbers' brazing mats. Just looking at the proximity of the airboxes to the exhaust manifolds, there must be loads of heat-soak going on. I reckon that even though there'd still be fair amount of convection going on, if you could cut out a reasonable proportion of the radiated heat, you could probably have a noticable impact on intake temps. Covering the bottom of the airbox with aluminium foil tape might help some too.
AlVal said:
Billy_rfc said:
Christ reading this you'd think you were running a £50 banger trying to make sure the rusty pile of crud didn't cook itself! If the cooling fans are running and doing there job then whats the problem?
If your worried about the temp get some heat wrap for the manifolds.
Billy.
£50 bangers are not the only type of vehicle whose engine heat needs watching, and everything you can do to reduce it helps, right? don't many cerbera owners already make amendments to the radiator fan system to get it to cut in sooner etc out of fear of coolant system temps going too high?If your worried about the temp get some heat wrap for the manifolds.
Billy.
Heat wrap for the manifolds? cerbera manifolds are prone enough to cracking without trapping all their heat into them with heat wrap, this would surely push the manifolds beyond their temperature tolerances and make them crack even more quickly. Show me any manifold manufacturer that guarantees their product after heat wrapping...
Wrapped naturally
Billy
AlVal said:
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Heat wrap for the manifolds? cerbera manifolds are prone enough to cracking without trapping all their heat into them with heat wrap, this would surely push the manifolds beyond their temperature tolerances and make them crack even more quickly. Show me any manifold manufacturer that guarantees their product after heat wrapping...
I would suggest that it's the temperature gradient over the cross section of the manifold material that causes the cracks, not the temp attained itself. This would make me think that wrapping the manifolds would reduce rather than increase the likelihood of cracking as there'll be a more even temp throughout the manifold. (Temp difference from inside to ouside the manifold)(Big difference means big stresses in the metals due to differences in expansion, which causes cracks).Heat wrap for the manifolds? cerbera manifolds are prone enough to cracking without trapping all their heat into them with heat wrap, this would surely push the manifolds beyond their temperature tolerances and make them crack even more quickly. Show me any manifold manufacturer that guarantees their product after heat wrapping...
HOwever, I don't own one to try it out on, so can't prove it either way, unfortunately.
Billy_rfc said:
AlVal said:
Billy_rfc said:
Christ reading this you'd think you were running a £50 banger trying to make sure the rusty pile of crud didn't cook itself! If the cooling fans are running and doing there job then whats the problem?
If your worried about the temp get some heat wrap for the manifolds.
Billy.
£50 bangers are not the only type of vehicle whose engine heat needs watching, and everything you can do to reduce it helps, right? don't many cerbera owners already make amendments to the radiator fan system to get it to cut in sooner etc out of fear of coolant system temps going too high?If your worried about the temp get some heat wrap for the manifolds.
Billy.
Heat wrap for the manifolds? cerbera manifolds are prone enough to cracking without trapping all their heat into them with heat wrap, this would surely push the manifolds beyond their temperature tolerances and make them crack even more quickly. Show me any manifold manufacturer that guarantees their product after heat wrapping...
Wrapped naturally
Billy
look great - I didnt know there was anything out there for the 4.2? custom made? I've heard 4.5 manifolds fit, and have a larger bore, but not sure thats true?
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