 cool windscreens, how do you make em |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| usa4cheer |
 Feb 16 2006, 06:35 PM
Post
#1
|
|
Newbie  Group: Members Posts: 29 Joined: 16-February 06 From: richmond, va Member No.: 5,592  |
I am working on my grassroots motorsport challenge car and want to take the windshield out of my car and want to do the mini windscreen. How do you make it???
|
   |
 
|
| Jeroen |
Feb 16 2006, 06:44 PM
Post
#2
|
|
914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
you can just buy it from most vendors of fibreglass bodyparts
|
|
|
|
| d914 |
Feb 16 2006, 08:00 PM
Post
#3
|
|
Advanced Member Group: Members Posts: 2,331 Joined: 12-July 03 From: Atlanta, ga Member No.: 904 Region Association: South East States |
grassroots has a VERY small budget for building cars....you must make or adapt junk yard parts....$2006 total!!
|
|
|
|
| alpha434 |
Feb 16 2006, 08:25 PM
Post
#4
|
|
My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
2006$ HOLY COW!!!
If you can't use fiberglass, then you could use lexan and a heat gun to shape it. Otherwise you could make a fiberglass form out of styrofoam. |
|
|
|
| davep |
Feb 16 2006, 08:32 PM
Post
#5
|
|
914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
Why remove the windshield? My friends GT can run either way, and he claims it makes no difference. Most of the guys he runs against cannot remove the windshield, and would bitterly complain of an unfair advantage if he did. So he doesn't and still beats them. Saves a lot of cost and effort.
|
|
|
|
| alpha434 |
Feb 16 2006, 09:00 PM
Post
#6
|
|
My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
Dave is right. To an extent. You are removing the windshield ro reduce the drag coefficient. GT cars have the aerodynamic equivalent of a trash can hanging from each quarter panel.
A GT car can fit really aggressive tires, but it has to deal with a worse drag number. Meanwhile, the drag coefficient won't really come into play unless you plan on getting to a pretty aggressive speed. Base your decision on track layout. Big track that favors top speed (roundy round and such)=get rid of windshield. Small track that favors light, balanced cars, and handling= don't worry about it too much. |
|
|
|
| SirAndy |
Feb 16 2006, 09:14 PM
Post
#7
|
||
|
Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
dude, get a clue. where do you pull this dumb stuff from ??? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) the 914 has a slightly better CD than the 911 turbo ... i told you that before ... (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) Andy |
||
 |
|
||
| T H O M A S |
Feb 16 2006, 09:34 PM
Post
#8
|
|
Senior Member Group: Members Posts: 626 Joined: 1-August 03 From: Donaueschingen, Germany Member No.: 974 Region Association: None |
homemade
Attached image(s) 
|
|
|
|
| Twystd1 |
Feb 16 2006, 09:42 PM
Post
#9
|
|
You don't want to know... really..... Group: Members Posts: 2,514 Joined: 12-September 04 From: Newport Beach, California Member No.: 2,743 |
Thomas..
I love that car.... That sucker is CLEAN..!!! And fuching loud. Twystd1 |
|
|
|
| alpha434 |
Feb 16 2006, 09:42 PM
Post
#10
|
||||
|
My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
You said better than a 935 by .02 points. Where did that come from? I'm not advising him on the drag difference between a 911 and a 914 Look at a slab-side 914 and then look at a GT. Which between these two have a better CD? It's nice to go by numbers, but sometimes you don't have a wind tunnel handy. Yeah? 914= .034 935= .036 I think this is what Andy told me before. I don't know the number difference between a 914 with fender flares as opposed to one without. Nor do I know where to find that info. |
||||
|
|
|
||||
| r_towle |
Feb 16 2006, 11:15 PM
Post
#11
|
|
Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
|
So, a custom windscreen.
Either you make a foam template, or plug..and you can fiberglass that... Or,,,cut the a-pill till its 6 inches tall and either cut a stock windshield, or make one from lexan.... Or, make a plug or a mold from plywood...a form to bend some lexan on. You can use a heat gun, but 1/4 inch lexan takes a long time to heat up enough.... So, go find a cool car guy who works at a pizza place, or a restaraunt and has one of those big ovens... Get all ready wit your form, get the lexan cut to the proper shape.... Do a couple of test pieces and use a timer.... You have to get it just right..hot enough to bend, but still stiff enough to lift out of the oven.. If you make a mold from metal or aluminum..you can lets it slump into the mold..so you can look through the window on the oven..when it finally slumps...your done, take it out. Good Luck. Rich |
|
|
|
| Aaron Cox |
Feb 16 2006, 11:28 PM
Post
#12
|
||
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
mah ears be hurting thinking about it.... |
||
|
|
|
||
| usa4cheer |
Feb 16 2006, 11:46 PM
Post
#13
|
|
Newbie Group: Members Posts: 29 Joined: 16-February 06 From: richmond, va Member No.: 5,592 |
WOW
what a great response, it would have a taken a week for this much info on any other forum. The $2006 challenge is an autocross, drag race and councours for creativity and ingenuity. I want to remove the windshield for the fun of it. No class rules or anything to worry about. It's a budget build up competition. I am thinking of doing a blog to keep a diary of my adventures. Just joined and still looking into it. thanks again. |
|
|
|
| alpha434 |
Feb 16 2006, 11:58 PM
Post
#14
|
|
My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
You get free weblog space with membership. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
|
|
|
|
| usa4cheer |
Feb 17 2006, 12:00 AM
Post
#15
|
|
Newbie Group: Members Posts: 29 Joined: 16-February 06 From: richmond, va Member No.: 5,592 |
I probably should add that I have 7 914's so don't think I am chopping up some possible restoration. I got a few given to me, a race car and my wife's, and some for later engine swaps. The challenge car is a turbo 2.0 with 1.7 heads. Oh yeah let me know if you need parts.
|
|
|
|
| SirAndy |
Feb 17 2006, 12:04 AM
Post
#16
|
||
|
Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
so, without the numbers or a windtunnel handy, you just make up your own "truth" and tell a newbie he's going to drive a square brick around the track ... ever thought that the new guy *might* just think you know what you're talking about and takes you seriously? (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) Andy |
||
|
|
|
||
| alpha434 |
Feb 17 2006, 12:27 AM
Post
#17
|
|
My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
1969 Porsche 914/6 - Technical specifications This record added before December 1995. Last modified 2005-11-10. bodywork Type 2S FHC Designer Number of doors 2 dimensions & weights Wheelbase 2450 mm 96.5 in Track front 1343 mm 52.9 in rear 1383 mm 54.4 in Length 3985 mm 156.9 in Width 1650 mm 65 in Height 1220 mm 48 in Length:wheelbase ratio 1.63 Ground clearance 128 mm 5 in Kerb weight 940 kg 2072 lb Weight distribution (Front) Fuel capacity 61.8 litres 13.6 UK Gal 16.3 US Gal aerodynamics Drag coefficient 0.450 Frontal Area Cx engine Code Manufacturer Porsche Type F-6 Dry sumped SOHC 12 valves total 2 valves per cylinder Main bearings 8 Construction light alloy block & head Bore × stroke 80.00mm × 66.00mm 3.15 in × 2.6 in Bore/Stroke ratio 1.21 Displacement 1991 cc (121.498 cu in) Unitary capacity 331.83 cc/cylinder Compression ratio 8.60:1 Fuel system 2 We carbs Aspiration Normal Compressor type N/A Intercooler None Catalytic Converter N Max. output (DIN) 111.5 PS (110.0 bhp) (82 kW) @5800 rpm Max. torque (DIN) 157.0 Nm (116 lbft) (16 kgm) @4200 rpm Maximum rpm 6500 rpm Coolant Air Specific output 55.2 bhp/litre 0.91 bhp/cu in Specific torque 78.85 Nm/litre |
|
|
|
| Aaron Cox |
Feb 17 2006, 12:29 AM
Post
#18
|
||
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
that goes against everything ive heard....
i always heard in the .3's.... |
||
|
|
|
||
| SirAndy |
Feb 17 2006, 12:51 AM
Post
#19
|
||
|
Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
and you are correct, sir ... (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) From "UP Fixen", Vol.5, Page 314: 1) Top on, Windows up & Headlights shut = CD 0.363 2) Headlights up = CD 0.380 3) Headlights up, Windows open = CD 0.381 4) same as above but Roof off = CD 0.484 (IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif) Andy |
||
|
|
|
||
| alpha434 |
Feb 17 2006, 12:53 AM
Post
#20
|
|
My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
Now that's where I'm confused.
Is that .34 WITH or WITHOUT the flares? |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 07:58 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.