Discussion
EGB said:
I've not either after 56K miles. No paranoia yet to need to cut ugly ventilation holes in the beautiful Griff bonnet.
If i was to put any holes in the Griff bonnet , i would put them at the end of the lip facing the Windscreen. That would be one way of defrosting the Windscreen.
RichB said:
neutral 3 said:
, the under bonnet temps are a joke...
As I say, never had a problem, mine must be the exception. The splitter is intended for cooling only and was added to the 500 and some late pre cats I believe. It's placed so it creates an area of negative air pressure behind the radiator to assist in air being drawn through the radiator. The same 'suction effect' also helps stop front end of the bonnet flapping up and down in the tracks at the front.
Any stability benefits that may occur are secondary to it's cooling assistance.
V8 GRF said:
Mine has never overheated when everything was working properly either.
and to confirm mine does not overheat if everything is working properly, the trouble is everything does not always work properly and I do keep a watchful eye on that temperature gauge 'just in case'.In my experience I cannot emphasise the importance of properly bleeding that system.
Any assistance I can give the system seems like a good idea so I think I will have a little experiment with that splitter on my return. Pete
Hi lads ,they are from car builders solutions .they are not stick on they are pop riveted when i said cheap i meant if you compared them with the fibron one , which myself i think look like a chim ,if i wanted the car to look like a chim i would have got one ,each to their own taste i guess my self i like them and am not alone by this as i few people on PM have asked me where i got them from anyway like i said each to their own if i ever want to sell the car if the buyer don,t like the vents on the car i will put my other bonnet on the car which is the same color so he can take both away with him so he,s a happy chappy
Edited by paul2000 on Monday 23 June 14:15
Edited by paul2000 on Monday 23 June 14:17
ThePrisoner said:
Hedgehopper said:
Like this?
Yep that works for me . Very Subtle Pete Mac said:
V8 GRF said:
Mine has never overheated when everything was working properly either.
and to confirm mine does not overheat if everything is working properly, the trouble is everything does not always work properly and I do keep a watchful eye on that temperature gauge 'just in case'.In my experience I cannot emphasise the importance of properly bleeding that system.
Any assistance I can give the system seems like a good idea so I think I will have a little experiment with that splitter on my return. Pete
I totally agree about ensuring the system is bled properly.
I've knocked off and replaced the splitter over five times now (one time it only lasted about 3 hours
) and it's always made a noticeable difference when I've got round to refitting it.Do we need two splitters fitted?! One to cause the negative pressure fitted to body in front of the chassis cross member as fitted by TVR, and one on the bottom lip of the radiator body entry to catch and pass more cool air through the radiator. Sorry for my thinking, it's probably uncool. 
EGB said:
Do we need two splitters fitted?! One to cause the negative pressure fitted to body in front of the chassis cross member as fitted by TVR, and one on the bottom lip of the radiator body entry to catch and pass more cool air through the radiator. Sorry for my thinking, it's probably uncool.
I think that two splitters may well interfere with the functions of each other by each disturbing teh others airflow. It's also double the splitters to replace. V8 GRF said:
EGB said:
Do we need two splitters fitted?! One to cause the negative pressure fitted to body in front of the chassis cross member as fitted by TVR, and one on the bottom lip of the radiator body entry to catch and pass more cool air through the radiator. Sorry for my thinking, it's probably uncool.
I think that two splitters may well interfere with the functions of each other by each disturbing teh others airflow. It's also double the splitters to replace. 
3 cheers for cutting 2 dirty great holes in ones bonnet.... Hip hip hooray, hip hip....
The beast has been de catted ( under bonnet temps should be lower ) has a hot cam, modified heads, enlarged doo bree, Jag AFM, NGK plugs, yellow ignition leads, pink anti freez etc etc, so is far from standard, must just be my one that needs bonnet vents lol
The beast has been de catted ( under bonnet temps should be lower ) has a hot cam, modified heads, enlarged doo bree, Jag AFM, NGK plugs, yellow ignition leads, pink anti freez etc etc, so is far from standard, must just be my one that needs bonnet vents lol
anonymous said:
[redacted]
Can't see the photo on this computer but assuming it's like RichB's. I have to say that I agree with you, I also think it has something and I am not convinced it spoils the Griff's beautiful lines. If it does anything to reduce underbonnet temperatures (to the point where my bonnet stay is too hot to handle) then it must be doing something good. I am guessing the vents sit above the exhaust manifolds so hopefully a lot of the heat from the manifolds vents straight out.
It's probably not the first thing on my 'to-do' list, however when I get round to it I will be buying one of these bonnets because I think it makes sense. If a future purchaser (when I am too decrepit to drive the Griff) wants to swap the bonnets back then so be it. Pete
Morning Pete, re the bonnet prop, yes you have just reminded me, I had forgotten that my one ( Steve Heath ) is often too hot to touch as well.
In my minds eye I'm thinking right now about that awesome, fantastic long journey across France and on to the Black Forest in August 2007 in my " bought the week before " first Griff ". The heat thrown back by the alloy dash at my face which was awful and that when stopping at services the bonnet prop was too hot to touch and the incredible heat as I tried to open the bonnet.
If that car had had bonnet vents it may well have made our trip much more pleasant.
Agree as well that if a future buyer wants originality he can flog the "extras for a tidy sum" !
In my minds eye I'm thinking right now about that awesome, fantastic long journey across France and on to the Black Forest in August 2007 in my " bought the week before " first Griff ". The heat thrown back by the alloy dash at my face which was awful and that when stopping at services the bonnet prop was too hot to touch and the incredible heat as I tried to open the bonnet.
If that car had had bonnet vents it may well have made our trip much more pleasant.
Agree as well that if a future buyer wants originality he can flog the "extras for a tidy sum" !
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