Discussion
The basic idea behind most front chin spoilers is to stop air passing underneath the car where it can cause swirl due to the many gaps on a cars underside. Many cars have plastic type under trays to smooth the passage of air as it goes underneath.
The only sure way to prove how the spoiler works would be in a wind tunnel ??
On the Griff I imagine that the front spoiler should push the rush of air slightly back forward and up into the radiator ? and also direct some of it over the car. ?
The front nose of a Griff is similar to a Series 1 E Type, which at speed can get very light on the front end due to lift. My Griff get a bit front end light at very high 140 plus speeds. I intend to try a spoiler as soon as I can can locate one.
I'm sure fitting back on the spoiler will help with cooling @ any speed above 40 mph. At the moment @ a steady high speed without the front number plate she sits @ 90 ish on the gauge. ( Which incidentally is stupidly placed in the near hidden right corner of the dash. ) it's one job that I just havnt got round to doing, swapping it for the clock or fuel gauge.
The only sure way to prove how the spoiler works would be in a wind tunnel ??
On the Griff I imagine that the front spoiler should push the rush of air slightly back forward and up into the radiator ? and also direct some of it over the car. ?
The front nose of a Griff is similar to a Series 1 E Type, which at speed can get very light on the front end due to lift. My Griff get a bit front end light at very high 140 plus speeds. I intend to try a spoiler as soon as I can can locate one.
I'm sure fitting back on the spoiler will help with cooling @ any speed above 40 mph. At the moment @ a steady high speed without the front number plate she sits @ 90 ish on the gauge. ( Which incidentally is stupidly placed in the near hidden right corner of the dash. ) it's one job that I just havnt got round to doing, swapping it for the clock or fuel gauge.
Hello Rob, Interesting question, im convinced that the Griff ( like an R5 GT Turbo ) and like an E Type ( which has them ) needs louvres in the Bonet. The heat build up under there on a hot day is very high and the heat has hardly anywhere / no where to exit from.
Louvres in the side of the front wings to pull the heat out would probably help, but TVR didn't design them in to the smooth Griff shape and I'm very surprised that TVR didn't put them in the Griff Bonet from the outset.
On my previous 5 Turbos, as soon as it got hot the power used to drop off considerably as the heat just couldn't get out. Louvred bonets on these cars soon became very common back in the day.
One tip that I find essential, is that on a hot day and I'm stuck in stationary / slow moving traffic ( often encountered on the A21 Hastings road ) is to pull the bonnet realease, then reach around the screen and lift the bonnet up about a foot. This really helps to let the heat out.
If the traffic then starts to pick up speed you can reach forward and pull the bonnet back down. Even with it not latched back down and at speed I havnt had the bonnet raise due to air getting underneath it.
I got this idea in the past having seeing E Types stuck in heavy / slow traffic with the back of the ( front hinged Bonet raised )
Re fans cutting in, my fans havnt been cutting in for a while and I havnt yet found the cause, so I manually flick them on when the temp hits around 60. And at speed they have to stay on to keep the temp @ around 90.
However, has anyone noticed that when you switch the fans in just how much engine power seems to drop and the car sort of stumbles ?
Despite my new alternator it still does this.
Anyone fitted louvres to their Bonet and any pictures ?
Louvres in the side of the front wings to pull the heat out would probably help, but TVR didn't design them in to the smooth Griff shape and I'm very surprised that TVR didn't put them in the Griff Bonet from the outset.
On my previous 5 Turbos, as soon as it got hot the power used to drop off considerably as the heat just couldn't get out. Louvred bonets on these cars soon became very common back in the day.
One tip that I find essential, is that on a hot day and I'm stuck in stationary / slow moving traffic ( often encountered on the A21 Hastings road ) is to pull the bonnet realease, then reach around the screen and lift the bonnet up about a foot. This really helps to let the heat out.
If the traffic then starts to pick up speed you can reach forward and pull the bonnet back down. Even with it not latched back down and at speed I havnt had the bonnet raise due to air getting underneath it.
I got this idea in the past having seeing E Types stuck in heavy / slow traffic with the back of the ( front hinged Bonet raised )
Re fans cutting in, my fans havnt been cutting in for a while and I havnt yet found the cause, so I manually flick them on when the temp hits around 60. And at speed they have to stay on to keep the temp @ around 90.
However, has anyone noticed that when you switch the fans in just how much engine power seems to drop and the car sort of stumbles ?
Despite my new alternator it still does this.
Anyone fitted louvres to their Bonet and any pictures ?
Beauty...... Is in the eye of the beholder.
On a dark colored car they would look fine. But but yes, Chimp ones better looking.
The Griff was woefully under developed by TVR, the under bonnet temps are a joke, less heat build up means more power and anything to help reduce under bonnet temps has to be a very good thing.
On a dark colored car they would look fine. But but yes, Chimp ones better looking.
The Griff was woefully under developed by TVR, the under bonnet temps are a joke, less heat build up means more power and anything to help reduce under bonnet temps has to be a very good thing.
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
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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