P38 bonnet vents

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boycie

boycie

Active Member
Posts
538
Location
Silver end Braintree ESSEX
Has any one fitted bonnet vents to a P38 ,if so what vents did you use and did it make a difference to the temp under the bonnet ?. We went green laning with a group last weekend around Suffolk mainly the Thetford area. The car behaved brilliantly and surprised a lot of people as I had the don't worry we have a lot of water and there is a couple of ponds on the way ,we will give you a tow if the suspension will stay up long enough crap at the start .The outside ait temp was 28c when we stopped for lunch I lifted the bonnet and the heat under there was unbelievable . At the end of the trip a couple of the people came up to me and said I would definitely have one of those P38's if I could find a good one .
 
It is normal.

The temps in Dubai reach the low 50s and my P38 just kept going .......

It is not a good idea to tamper with the air flow under the bonnet.
 
IMG_20150816_193039.jpg IMG_20150816_193112.jpg I have to say the heat coming from my bonnet vents after even a short run, are unbelievable.
By venting excess heat I gotta be at least prolonging the brittle cable / rubber seal / electrical components breakdown etc etc
The cheap ones I fitted do the job well...that's all I need.
You can buy bling ones but you need to consider water ingress, black roofing mastic directs water effectively
 
Enuff said:
View attachment 89504 View attachment 89505 I have to say the heat coming from my bonnet vents after even a short run, are unbelievable.
By venting excess heat I gotta be at least prolonging the brittle cable / rubber seal / electrical components breakdown etc etc
The cheap ones I fitted do the job well...that's all I need.
You can buy bling ones but you need to consider water ingress, black roofing mastic directs water effectively
Click to expand...
Not trying to be funny about this. But how do you know "do the job well"?

Have you measure cfm airflow out of the vents vs the air flow coming in, or engine bay temps or a heat map of the under bonnet area. Just because you can feel warm air out of the vents is no proof they are having any significant affect and if any affect they have is a positive or negative one.
 
300bhp/ton said:
Not trying to be funny about this. But how do you know "do the job well"?

Have you measure cfm airflow out of the vents vs the air flow coming in, or engine bay temps or a heat map of the under bonnet area. Just because you can feel warm air out of the vents is no proof they are having any significant affect and if any affect they have is a positive or negative one.
Click to expand...

Plus the fact they look ridiculous. :D:D
 
I am always amazed that some people insist that the manufacturer always gets it wrong,and that they know better. If i remember my time in engineering (mainly nuclear) we seemed to spend forever calculating loads.both static and dynamic weights, winds and their effects,tensile strength . we then had to test to destruction the various joints and structures.I am sure that auto manufacturers do the same sort of thing to arrive at a safe serviceable cost effective vehicle.if the bonnet needed venting the manufacturers would have vented it surely. remember most of these vehicles are getting on a but and many have not been looked after until they landed in enthusiasts hands." give the vehicle a chance"
 
Yup, that is a lovely looking scoop, mine are vents tho..
also, the manufacturers didn't get it wrong at all, but did they acount for any of the under bonnet temps associated with ageing motors, not so efficient cooling systems and LPG plus global warming.
I have done 90k miles in the last 7 years in this motor and I believe my vents do assist in the transfer of excess heat from under bonnet and they do it with no noise, no water running into the engine bay and were very cheap and easy to fit.
Why are those wing vents fitted to l322, cosmetics, a bit of bling or lessons learned from the stuffy p38 engine bay making hoses cables and connectors brittle whilst unneccessarily baking the engine over 200,000 miles.....
 
Enuff said:
Yup, that is a lovely looking scoop, mine are vents tho..
also, the manufacturers didn't get it wrong at all, but did they acount for any of the under bonnet temps associated with ageing motors, not so efficient cooling systems and LPG plus global warming.
I have done 90k miles in the last 7 years in this motor and I believe my vents do assist in the transfer of excess heat from under bonnet and they do it with no noise, no water running into the engine bay and were very cheap and easy to fit.
Why are those wing vents fitted to l322, cosmetics, a bit of bling or lessons learned from the stuffy p38 engine bay making hoses cables and connectors brittle whilst unneccessarily baking the engine over 200,000 miles.....
Click to expand...

An old engine does not run any hotter than a newer one. Cooler in fact since thermostat temps were increased to help with emissions. Global warming are you having a laugh?
 
Yes wammers, with global warming I was having a laugh..
Although, A 17year old car with a cooling system that is as good as the day it was made, I think not, not mine anyway.
Yes it can be done but would cost more than my house, so those vents will have to do.
Can anyone tell me why these vents do nothing but LR fitted vents to L322 ???
I know they are on the wings, probably because customers liked the shape of the bonnet and people don't like 'different'.
 
Enuff said:
Yes wammers, with global warming I was having a laugh..
Although, A 17year old car with a cooling system that is as good as the day it was made, I think not, not mine anyway.
Yes it can be done but would cost more than my house, so those vents will have to do.
Can anyone tell me why these vents do nothing but LR fitted vents to L322 ???
I know they are on the wings, probably because customers liked the shape of the bonnet and people don't like 'different'.
Click to expand...

One side of the L322 is the air inlet. The other side is for show and does nothing. So they are not hot air vents they are cold air inlets.
 
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