TVR Griffith heat soak
Discussion
Has anyone found a way to get cool air from the heater / cooling system?
My valves are all correct but in standing or slow traffic there still too much heat coming from the vents.
I wondered about where the air intake is and whether there’s any mileage in improving the source of air?
My valves are all correct but in standing or slow traffic there still too much heat coming from the vents.
I wondered about where the air intake is and whether there’s any mileage in improving the source of air?
If the valve is closing (I had mine replaced 2 years ago), the best you'll get is ambient air from outside the car. In built up areas on a hot day, this will always be warm. 
The radiant heat coming through from the engine and gearbox you can't do anything about, unless extra insulation is fitted on a body off rebuild.
The radiant heat coming through from the engine and gearbox you can't do anything about, unless extra insulation is fitted on a body off rebuild.
If you ve got the car in enough of a stripped state you could presumably insulate inside the wing too where the air is drawn through.
My 500 has the extra blower on the driver s side too which seems to make more noise than blow air, but it does help and gets used from time to time.
The connection from the flexi pipes to the plastic vents behind the dash though is terrible - on my car, a round(ish) pipe just rammed over a rectangular duct. A good chunk of what poor airflow there is must be leaking out here. Has anyone improved this bit too? Could just be taped up but whenever I’ve had the dash out it’s a lot easier for access to push the plastic vents back in at the end with a hand reached in past the glovebox to push on the plastic pipes so wrapping them up then would be pretty hard.
My 500 has the extra blower on the driver s side too which seems to make more noise than blow air, but it does help and gets used from time to time.
The connection from the flexi pipes to the plastic vents behind the dash though is terrible - on my car, a round(ish) pipe just rammed over a rectangular duct. A good chunk of what poor airflow there is must be leaking out here. Has anyone improved this bit too? Could just be taped up but whenever I’ve had the dash out it’s a lot easier for access to push the plastic vents back in at the end with a hand reached in past the glovebox to push on the plastic pipes so wrapping them up then would be pretty hard.
Edited by Mr.Grooler on Monday 28th July 06:40
The air intake is a hole in the inner wing below the NS headlight. You can find this if you look inside the mouth.
Behind the hole is a motor which just sucks from the bottom and pushes out of the top. There was originally a piece of leather dividing the cavity below the headlight in two so the motor is pushing air into the top section and pressurising it. With nowhere else to go the air then goes over the wheel arch and into the cavity by your passenger door hinges.
There is a pipe plugged into this cavity below your glove box and this allows air to flow over your cabin heater matrix.
The valves just shut off the water to the heater matrix to either get it hot or not.
If you have air coming out of the vents the system is working. If you have very little or none it could be the leather divider has perished and the top of the headlight cavity isn't being pressurised.
You can imagine if the engine is hot and the inner wing heat-soaked you are just going to get warm air through the system.
And if you open the heater matrix valve it fills the matrix so even if you close the valve straight away you aren't going to get cold air until the matrix cools down again.
Behind the hole is a motor which just sucks from the bottom and pushes out of the top. There was originally a piece of leather dividing the cavity below the headlight in two so the motor is pushing air into the top section and pressurising it. With nowhere else to go the air then goes over the wheel arch and into the cavity by your passenger door hinges.
There is a pipe plugged into this cavity below your glove box and this allows air to flow over your cabin heater matrix.
The valves just shut off the water to the heater matrix to either get it hot or not.
If you have air coming out of the vents the system is working. If you have very little or none it could be the leather divider has perished and the top of the headlight cavity isn't being pressurised.
You can imagine if the engine is hot and the inner wing heat-soaked you are just going to get warm air through the system.
And if you open the heater matrix valve it fills the matrix so even if you close the valve straight away you aren't going to get cold air until the matrix cools down again.
Edited by Barreti on Thursday 14th August 19:00
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