How would you build the Ultimate XJS?
#41
#42
Hi Vancouver
I do exactly the same as you and take the Rain Tubes off because I never go out in the Rain and even with the unmodified Windscreen Wiper Pod
A lot of Heat from the Engine Bay seems to spill out of there, which really helps to keep the Engine Cool
Not sure about Fumes from the Engine Bay but since I only go out when the Weather is Sunny enough for driving with the Top Down, I haven't really noticed any fumes
As such I would imagine that a modified Windscreen Wiper Pod with a wider opening, just like you described would make an Amazing difference to the Heat Extraction from the Engine Bay
Without those Bonnet/Hood Louvres which look great on an XKE but not so much on an XJS but having said that I don't really want to go hacking my Cars around with an Angle Grinder
Though having a Pro Body Shop modify that Wiper Pod could be a good idea
Thoughts Guys?
When I took the Tubes off the Rain Ducts, a lot of Heat Spills of the Windscreen Wiper Pod but since this Car is a Convertible that I only drive with the Top down, I can't say that I've noticed any fumes from the Engine Bay
Although I wouldn't want to risk it in a Coupe! (Don't try this at home!)
Does anyone have any comments about the Danger of Fumes getting into the Car or am I just being Paranoid as usual?
I do exactly the same as you and take the Rain Tubes off because I never go out in the Rain and even with the unmodified Windscreen Wiper Pod
A lot of Heat from the Engine Bay seems to spill out of there, which really helps to keep the Engine Cool
Not sure about Fumes from the Engine Bay but since I only go out when the Weather is Sunny enough for driving with the Top Down, I haven't really noticed any fumes
As such I would imagine that a modified Windscreen Wiper Pod with a wider opening, just like you described would make an Amazing difference to the Heat Extraction from the Engine Bay
Without those Bonnet/Hood Louvres which look great on an XKE but not so much on an XJS but having said that I don't really want to go hacking my Cars around with an Angle Grinder
Though having a Pro Body Shop modify that Wiper Pod could be a good idea
Thoughts Guys?
When I took the Tubes off the Rain Ducts, a lot of Heat Spills of the Windscreen Wiper Pod but since this Car is a Convertible that I only drive with the Top down, I can't say that I've noticed any fumes from the Engine Bay
Although I wouldn't want to risk it in a Coupe! (Don't try this at home!)
Does anyone have any comments about the Danger of Fumes getting into the Car or am I just being Paranoid as usual?
#43
I've driven my coupé with the bonnet cracked open, and nothing out of the ordinary detected.
That said, I'd never remove the rain guards, as (a) I'll drive in rain if I need to or want to, especially as I live in one of the wettest parts of the country, and (b) I still have to park her outside.
That said, I'd never remove the rain guards, as (a) I'll drive in rain if I need to or want to, especially as I live in one of the wettest parts of the country, and (b) I still have to park her outside.
#44
#45
#46
#47
Alex is referring to the drain tubes that run down the left and right side inside the engine bay.
Cracking the bonnet open when driving will cause air to enter the engine bay not the the other way around. If you put wool tuffs on the trailing edge of the bonnet they will get sucked into the engine bay.
Here is a test of a hood scoop, opening the bonnet will have the same effect.
Cracking the bonnet open when driving will cause air to enter the engine bay not the the other way around. If you put wool tuffs on the trailing edge of the bonnet they will get sucked into the engine bay.
Here is a test of a hood scoop, opening the bonnet will have the same effect.
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orangeblossom (04-17-2019)
#48
#49
On a convertible, top open, no need to worry OB!
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orangeblossom (04-17-2019)
#50
Cracking the bonnet open when driving will cause air to enter the engine bay not the the other way around. If you put wool tuffs on the trailing edge of the bonnet they will get sucked into the engine bay.
Here is a test of a hood scoop, opening the bonnet will have the same effect.
Here is a test of a hood scoop, opening the bonnet will have the same effect.
The thing the holes DID affect was the underbonnet temperatures after a hot shutdown; temps go to nearly 90 C quite quickly in these circumstances, bonnet closed, and even more importantly, stay there for nearly an hour. With holes, or louvres no doubt, they come down in minutes. So I continued with my policy of opening the bonnet after a hot shut down!
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ronbros (04-17-2019)
#52
Alex is referring to the drain tubes that run down the left and right side inside the engine bay.
Cracking the bonnet open when driving will cause air to enter the engine bay not the the other way around. If you put wool tuffs on the trailing edge of the bonnet they will get sucked into the engine bay.
Here is a test of a hood scoop, opening the bonnet will have the same effect.
https://www.youtube.com/watch?v=LcqV3QIFRAg
Cracking the bonnet open when driving will cause air to enter the engine bay not the the other way around. If you put wool tuffs on the trailing edge of the bonnet they will get sucked into the engine bay.
Here is a test of a hood scoop, opening the bonnet will have the same effect.
https://www.youtube.com/watch?v=LcqV3QIFRAg
#53
#54
Bonnet vents just behind the radiator will aid airfow through the radiator. The high pressure across the top of the bonnet will suck air out of the engine bay. The Lancer EVO has a vent in this position.
Cracking the bonnet should in theory help cooling as cool air is being sucked into the engine bay. The reason air is sucked into the bay at the back of the bonnet is the flow travelling through the engine bay is exiting under the car, blocking air exiting the engine bay under the car can direct flow out of the back of the bonnet. New cars do this with full under trays that direct the air from the engine bay upwards which also has the effect of increasing downforce.
Cracking the bonnet should in theory help cooling as cool air is being sucked into the engine bay. The reason air is sucked into the bay at the back of the bonnet is the flow travelling through the engine bay is exiting under the car, blocking air exiting the engine bay under the car can direct flow out of the back of the bonnet. New cars do this with full under trays that direct the air from the engine bay upwards which also has the effect of increasing downforce.
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Greg in France (04-20-2019)
#55
From this I deduced that the suction under the car is pretty strong and it pulls the rad-exiting air downwards quite strongly. So whether, on an XJS, vents just aft of the rad will cause air to exit upwards I would like to test. It might be that it does enough to stall the undercar radiator-air flow and has adverse effects on high speed stability, for example.
Maybe when bored I will refit my test bonnet, cut some more holes and try it...
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