Tuscan Rear Screen Vents

[prideaux]

I ordered up the vents from Leiter for the rear screen on the Tuscan today and wondered if anyone can post some pictures of where they fitted them and how they fitted them i am sorting all the bits to do while the screens are out for painting and thought it made sense to do this while it is off the car have others glued or used small stainless bolts is the first question and also what size vent holes have you put in ie one large hole or several small holes also what sealant as i want as neat a finish as possible.
Thanks in advance.
Andrew

[gmw9666]

No idea on fitting but a few location ideas

http://www.classiccarsforsale.co.uk/car-advert/tvr...

[gmw9666]

Out of curiosity why do you need them?

[davegt6]

In my experience, cars with Kamm tails tend to end up with a lot of dirt on the rear panel from the exhaust gases - presumably as a result of the low pressure caused by the cut-off effect on the air flow the design was there to create. Therefore I think a low mounted vent is more likely to introduce exhaust fumes into the cockpit. Just my view but I'd mount towards the top of the screen.

[thegamekeeper]

prideaux said:

To reduce the air pressure at high speed and stop the rear screen popping out plus they where fitted to at least the V8 cars not sure about V6
A

Thanks for that info, I never realised rear screen vents were OE on Tuscan V8 SEs. Travelled quite a bit with James and Claude who both have GENUINE SEs and never had any of their windows "pop out".
We of course always stick to the speed limits (especially in Germany), you must just drive quicker than us (and goes without saying further). Stop waving your willy, its getting colder at night

[JDinoM64]

thegamekeeper said:

Thanks for that info, I never realised rear screen vents were OE on Tuscan V8 SEs. Travelled quite a bit with James and Claude who both have GENUINE SEs and never had any of their windows "pop out".
We of course always stick to the speed limits (especially in Germany), you must just drive quicker than us (and goes without saying further). Stop waving your willy, its getting colder at night

Genuine SE have a secret factory fitting to hold the windows in, you can always spot the fakes

[JDinoM64]

prideaux said:

To reduce the air pressure at high speed and stop the rear screen popping out plus they where fitted to at least the V8 cars not sure about V6
A

you could alway look at page 47 in Tiplers "the complete story"

[JDinoM64]

prideaux said:

At least when done she will get used and taken to events so at least when people ask what she is we can explain as most have never seen a genuine SE LWB V8 Tuscan.

thats strange think you will find my car is one of the best known Tuscan's in Europe, infact ive seen you walk passed it twice

[heightswitch]

prideaux said:

Yes James I am aware of that and you are one of the few and I had hoped to see her again this year at the pre 80s but I think you came in your other car.
I had noticed in other pictures of your car that the vents where on the side and thought they may have changed at some point but with that photo in johns book proves otherwise Thank you

the later SE spec cars had side mounted opposing vents on each side which caused better cross cabin ventilation, Owners run into trouble when they fit the vents the same way round to even the cars looks out.
Drivers side face forward and passenger side face rearward I think.

N.

[heightswitch]

prideaux said:

I am being serious..Think about it, Having an inlet and outlet creates a cross draw, Having 2 inlets creates a massive pressure wave in the cabin and turbulent air behind the drivers head. Having 2 outlets Creates similar turbulent airflow The only way to lessen this effect is to install further vents which is why the genuine SE's had the low level footwell ventilators. Similarly early griffs had the stainless side vents to be used in conjunction with the rear outlets to effectively damp adverse turbulent air build up allowing air into the cabin at low level and an escape route at the rear to keep the rear screens in tact.

In Non original cars you must fit the 4 or have 2 reversed or fit an odd number of vents to cancel out the excessive pressure build up.
Mine as you can see does not have rear vents because being a non original car does not have the same cabin airflow as a genuine car. Fitting vents will cause you problems.

On a further serious note. Before you fit the vents (if you must) you must carry out a test on the rear screen if you are drilling it to test whether the screen is Lexan or Perspex which is far more prone to fissure cracking if drilled.

Edited to add...The subject of Vents has been discussed as a TVR historical topic with very famous persons..if you research a very famous griffith The Mongoose. You will find a reference to Vandervels Orifice.

N.

Edited by heightswitch on Wednesday 16th October 22:15

Edited by heightswitch on Wednesday 16th October 22:24

Edited by heightswitch on Wednesday 16th October 22:33

[nwarner]

heightswitch said:

why do people keep calling me Nigel!!!
N.

Probably the same reason as people calling me Neil

Nige

[Astacus]

This is an image of 500ML (Tuscan SE) from 1985
It has vents at the bottom and shows not only the holes, but also the fixings




I really like he colour scheme. I think one of Neil's old cars has similar livery, and I am very tempted to do mine the same way

Edited by Astacus on Thursday 17th October 14:25

[davepen]

prideaux said:

also what sealant

Good question.

One on our car has "fallen" off. It doesn't have the the large flange that those one in your picture have. So U shaped profile, not omega shaped. So it can't be bolted. Having seen the effect of some solvents on some plastics, I wasn't in a hurry to glue it back, but on the other hand there is a hole or two to let in the rain.

Position: from memory more on the side than on the rear.

cf. Picture of James' car on google / tvr blog.

[gmw9666]

davepen said:

prideaux said:

also what sealant

Good question.

One on our car has "fallen" off. It doesn't have the the large flange that those one in your picture have. So U shaped profile, not omega shaped. So it can't be bolted. Having seen the effect of some solvents on some plastics, I wasn't in a hurry to glue it back, but on the other hand there is a hole or two to let in the rain.

Position: from memory more on the side than on the rear.

cf. Picture of James' car on google / tvr blog.

and here it is in action http://www.youtube.com/watch?v=gzSrB4ELxkE

[heightswitch]

Andrew you are confusing your cars.

SWB Tuscans and griffiths had the important front ventilators which are a curved opening rectangular vent.
LWB Tuscans had the fixed round fresh air inlets just above the sill line.

N.

[thegamekeeper]

prideaux said:

Yes N
Thats what i thought however there are pictures out there where i have seen both hence my confusion.
Can you shed any light on that.
A

How can he possibly shed any light on YOUR confusion?

[heightswitch]

prideaux said:

Yes N
Thats what i thought however there are pictures out there where i have seen both hence my confusion.
Can you shed any light on that.
A

The rectangular vents are easier to obtain and fit. A very similar one can be bought new but needs a slight set curved into it.

http://www.completeautomobilist.com/m/products/1/4...

You would need to fit these or the round vents to fit the rear vents.

[JDinoM64]

[quote=prideaux]

Can you shed any light on this as

[|http://thumbsnap.com/Bgp7ld6f[/url]

Thats Peter Rabbit a genuine LWB very well sorted ex race car, chassy number is 2 after mine.

[alphaone]

[quote=prideaux]
Plus it has the V6 Bonnet not the V8 bonnet
/quote]

Whats the difference with them? Thanks

[Terminator]

prideaux said:

That accounts for 4 LWB RHD SE cars that are accounted for

Are you really being serious? Really??