Let's talk windscreen/windshield Options

[technicalninja]

Good catch!
I hadn't noticed that!

Made me go look at the 75 I have.
Mine's flat!
I believe mine's original.
VW logo but the other windows have both VW and AUDI on them.
Front window "Laminated -F" and beneath that "Kinonglas-Kristall-FIRA-F-HI"
Side windows have Delodur 1-F
Rear has Delodur-1

Maybe my front has been changed?
It's definitely dealer installed if it has been replaced.
My car has been in a garage since 88 and only shows 31K which I believe is accurate.

My first post was accurate. "Kinonglas" beneath a VW logo.

I just rechecked- it's colder than hell here right now! You're middle of summer, right?

When I solve my Apple to Microsoft to 914World issues I'll post a pic of it.

[wonkipop]

As for tint, my current windshield ordered through a Porsche dealer is all clear—but I think I preferred the way the tinted upper section in my last one was super subtle yet hid the gangly visor hardware in my car, old Automotion stuff that allows you to swivel the visors to the side windows to block a hard sun.

@horizontally-opposed : Are your side windows tinted (Delodur-F) or clear (Delodur-1). Is the windshield matching your clear or tinted windows? Just wondering if by "tinted" Porsche is referring to the upper colored band, or the overall light green shade tint like the -F side glass.

Here are the two cars from Rennsport with Pilkington windshield. All same number but probably a different production year, notice the variance in inscriptions.








EDIT: I think I have found my answer. Looks like the top colored band is too modern and was never offered on our cars. The tinted is for the whole glass per images taken from Sierra Madre Collection Website, both Genuine Porsche.



Clear 914-541-101-10:





And tinted 914-541-102-10

i can decode those screens montreal914.
they are both identical.
they are clear screens (laminated safety glass).
these days clear is defined as more than 70% light transmittance.
this is pretty much where clear screens are in the modern era.
at 70%. slightly darker than a clear screen in the late 60s early 70s.
the indicator of that is the two vertical marks II above or next to the E! in the circle.
E1 in the circle means it meets german standards and is a screen sourced from germany.

if it was a tinted screen (ie less than 70% transparency it would have a V above or next to the E in a circle.

it really depends on the country whether you can have less than 70% trans.
i know in australia you can't. any darker tinting is restricted to a band above the central zone at the top of the window. most modern screens if you look real close have a line and and an arrow marking on either side down about 6 inches or so from the top.
above that line a darker tint can be applied.

both those screens are identical.
only thing different about them is when they were made.
that is indicated by the dots and the number which is the last line of the markings.
the number of dots tell you which month. the number indicates the year.
for instance the bottom one of those two was made in feb 2007.

i think what there is to understand these days and this relates to your question. tinted screen or not is that pretty much all windscreens are produced with glass at around the 70% transmission point. this is for reasons of health. ie skin cancer. that the limit in most countries by regulations so they take it to there. and thats called a clear screen.
and a tinted screen gets the darker band at top above the line and arrow markings.
and its an applied coating.

back in the 60s and 70s i think it went like this.
a tinted screen was a darker glass that went down to the 70% transmission threshold.
and a clear screen was much clearer with higher light transmission.
in the current age i don't think you can easily get a screen as clear as original ones used to be.

but if your car is meant to have a tinted screen to match tinted side glass then the current pilkington screen as you have photographed from two cars would i believe be the closest thing to what was in fact the tinted screen back in the day. (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/beerchug.gif)

[wonkipop]

Good catch!
I hadn't noticed that!

Made me go look at the 75 I have.
Mine's flat!
I believe mine's original.
VW logo but the other windows have both VW and AUDI on them.
Front window "Laminated -F" and beneath that "Kinonglas-Kristall-FIRA-F-HI"
Side windows have Delodur 1-F
Rear has Delodur-1

Maybe my front has been changed?
It's definitely dealer installed if it has been replaced.
My car has been in a garage since 88 and only shows 31K which I believe is accurate.

My first post was accurate. "Kinonglas" beneath a VW logo.

I just rechecked- it's colder than hell here right now! You're middle of summer, right?

When I solve my Apple to Microsoft to 914World issues I'll post a pic of it.

yep - orig screen (IMG:style_emoticons/default/beerchug.gif)
and they do look flatish in the middle.
as i remarked in my earlier post, the photo of the 914/8 as demonstrating curvature of original screens is slightly misleading. it all depends on the exact position of the camera.
the bubble like curvatures are out towards the outer edges. so it doesn't take much to make one look different from the other in photos by just a very small amount of difference in camera angle and position.

[Montreal914]

Well, the two numbers seems to be available, both 101 and 102.

Here are the screenshots of both numbers from the same Porsche dealer, yet the price is different. I doubt these are the same part with different price. (IMG:style_emoticons/default/blink.gif) Surely, there must be a difference. From the Porsche parts document, the 101 is clear and the 102 is tinted.

But you clearly know more than I do! (IMG:style_emoticons/default/laugh.gif)

If you think the cheaper one from Porsche will be a good matching shade with my side Delodur-F, I definitely prefer the lower priced one. (IMG:style_emoticons/default/smile.gif) BTW, that price was $508 and went up to $570 January 1st. (IMG:style_emoticons/default/dry.gif)

[wonkipop]

Well, the two numbers seems to be available, both 101 and 102.

Here are the screenshots of both numbers from the same Porsche dealer, yet the price is different. I doubt these are the same part with different price. (IMG:style_emoticons/default/blink.gif) Surely, there must be a difference. From the Porsche parts document, the 101 is clear and the 102 is tinted.

But you clearly know more than I do! (IMG:style_emoticons/default/laugh.gif)

If you think the cheaper one from Porsche will be a good matching shade with my side Delodur-F, I definitely prefer the lower priced one. (IMG:style_emoticons/default/smile.gif) BTW, that price was $508 and went up to $570 January 1st. (IMG:style_emoticons/default/dry.gif)

(IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) its all a mystery mate. (IMG:style_emoticons/default/biggrin.gif)
not sure what porsche is offering.
but whatever the case, you are after the tinted one given your side glass and you will find the clear one very clear if it is in fact a match for the original factory ones.

i can tell from those original two photos you put up of pilkington screens on two cars that they are marked as what is commonly available on modern cars as a clear screen.
the two vertical marks (sometimes sloping or italicised) that are next to the circle with the E. what indicates a standard clear screen in the modern world.

the original screens had very different coding on them that indicated clear or tinted.
in the thread i linked were those markings for both sigla and kinonglass.

as to what porsche or sierra mardre are offering i don't really know.
i think how they would indicate its a clearer glass than 70% must be by some other coding than what is shown in those two pilkington screens you posted.
none of the rest of the coding in those screens indicates tinting to the best of my knowledge. its entirely possible they are reproducing somehow those original much clearer screens. but i am not sure really how that would be marked or indicated on the screens.


PS
its all a pretty esoteric area.
for instance back in the day if you got a sigla tinted screen what that meant was the glass was in fact a very beautiful noticeably greener glass - thats what distinguished them. a lot of 911 guys go after those screens for that reason.
and if you got the kinonglass tinted screen that was more about it being a darker grey color. it could be that porsche classic are offering that distinguishing feature these days with their genuine spare part screens. it could be a flow on from their supply of 911 screens. its really hard to know exactly what they are up to unless you can open a box and compare the two screens. all i know from down here is that the early 911 guys covet those tinted sigla screens for the colouring and maybe that is what porsche classic have gone after being able to offer.

[Montreal914]

Unfortunately, I didn't check to see what was the shade of the side windows on those two Rennsport cars. (IMG:style_emoticons/default/dry.gif)

I doubt it would be possible to check both Porsche new windshield side by side because no one stocks them, it's all on order. So I guess I will have to be patient and try to search for cars I could look at in person.


In the meantime @Technicalninja , here is a picture of the middle area of a knockoff replacement windshield. It's really flat at the top for about 12" and barely 1/8" in 15".

I will be curious to see a similar picture of your original windshield. (IMG:style_emoticons/default/idea.gif)

[wonkipop]

Unfortunately, I didn't check to see what was the shade of the side windows on those two Rennsport cars. (IMG:style_emoticons/default/dry.gif)

I doubt it would be possible to check both Porsche new windshield side by side because no one stocks them, it's all on order. So I guess I will have to be patient and try to search for cars I could look at in person.


In the meantime @Technicalninja , here is a picture of the middle area of a knockoff replacement windshield. It's really flat at the top for about 12" and barely 1/8" in 15".

I will be curious to see a similar picture of your original windshield. (IMG:style_emoticons/default/idea.gif)

you could try getting in contact with pilkington classic direct @Montreal914 .

i found the link i had filed away from screen research a few years back.
link still works. its a european website. maybe UK based.

https://www.pilkington.com/en-gb/uk/automot...assic-cars-home

they have a whole series of listings for the 914 that i cannot unscramble.
i have no idea what they mean as they don't have an abbreviations decoder to go with their classic parts listing.
but perhaps if you emailed them they might explain what they all are.
this would be where porsche themselves are sourcing the windscreens they sell as spare parts. its likely all this reduces down to something like a clear screen version and a "tinted" screen version but i can't work it out.

when you select porsche in their home page you get this list for the 914.
which is more than two different types, so i don't really know.
this could be a reference to all the different windscreens that were in the 914s as they progressed through the model years. i do know that the kinonglas screens evolved and updated processes were used in manufacture originally. so pilkington might simply be referring to all those particular original screens using some sort of original spec list from the original manufacturer suppier (subsidiaries of St. Gobain). only the kinonglass screens evolved. the SIGLA screens seemed to stay the same.



its a neat website when you cruise around in it.
they can pretty much make anything you want and will ---assuming you want to pay for it. there is a neat little piece in there on remaking the windscreen for a 917.

also if you cruise around you can find the bit where they can offer a windscreen marking. that is more or less period correct but incorporates the modern EU approval code markings that make your screen legal for registration and road use after restoration.
they do the triple XXX and SIGLA brand recreated markings. which are the two they have rights to reproduce. i think XXX was the original pilkington safety glass brand for the UK market. was not on porsches. i have no idea if you can get a one off screen or whether it has to be a minmum batch. but you fill out the forms that pop up on the website and order it. i dunno, if 914/6 guys out there want to get super uptight about it they can get one (it still won't be absolutely correct but (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) ) but it will be legal.
you can get them in white ink. black ink or etched in.

[wonkipop]

@Montreal914
i have the original kinonglas screen in my 74.
straight edge at middle directly above mirror.

[friethmiller]

@Montreal914

A few photos for you of my new windshield from 914Werke. Last photo is from 6" below the top of the glass frame, which is approximately where my rearview mirror is on my other car. My other '74 has an OEM Sigla windscreen and the curvature seem the same. Hope it helps!

[Montreal914]

@friethmiller

Yes, Fred that is very helpful. Thank you for taking these shots! Seems to have a lot more curvature than my very flat one. (IMG:style_emoticons/default/smile.gif)

When you get a chance (zero rush), can you take a last picture with the same paint stick but using its whole length from ~mid height to the top to see how much of a gap there is at the top? This would be a great comparison to my 15" plastic ruler picture of post #26.

Happy late TG! Looking forward to read your fast progress! (IMG:style_emoticons/default/smilie_pokal.gif)