914 559 163 10 "protection cover" question, Those plastic deflectors under the firewall |
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914 559 163 10 "protection cover" question, Those plastic deflectors under the firewall |
johannes |
Jul 17 2011, 12:36 PM
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#1
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Club Porsche 914 France President Group: Members Posts: 3,084 Joined: 13-January 06 From: France Member No.: 5,409 Region Association: France |
914 559 163 10 "protection cover" question. Those plastic deflectors under the firewall.
What are they for ? Are they to deflect dust and stones from hitting the engine tin ? They are not fitted on the 914-6 and I was told they were not fitted on early 1.7 ? Do you have any information about this part ? |
type47 |
Jul 17 2011, 01:42 PM
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#2
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
I believe they were installed on 73 and later cars. Purpose is to affect air flow for better cooling.
http://www.914world.com/bbs2/index.php?showtopic=102763 |
reharvey |
Jul 17 2011, 02:11 PM
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#3
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Senior Member Group: Members Posts: 573 Joined: 16-July 08 From: N. E. Ohio Member No.: 9,308 Region Association: North East States |
Yeah---A lot of guys have added these to they're early four cyl. cars. Don't know if they really make any difference.
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Mikey914 |
Jul 17 2011, 02:27 PM
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#4
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Cooling is the reason, I looked at these when I did the airdam. They create a low pressure area behind them and draw the hot air down.
Looks good on paper, and should actually reduce the operating temps, how much... who knows, but I bet that someone here could let us know thire experience. I had thought about making these in Aluminum as it would be relitively inexpensive. Just never got around to it. Mostly becaue I had not got a chance to evaluate it myself. |
johannes |
Jul 17 2011, 03:18 PM
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#5
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Club Porsche 914 France President Group: Members Posts: 3,084 Joined: 13-January 06 From: France Member No.: 5,409 Region Association: France |
So only installed on post 73 cars ? ...
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SirAndy |
Jul 17 2011, 04:33 PM
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#6
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Resident German Group: Admin Posts: 41,651 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
So only installed on post 73 cars ? ... Yes. Btw. the Boxster has a similar setup ... (IMG:style_emoticons/default/shades.gif) |
Cupomeat |
Jul 17 2011, 08:00 PM
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#7
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missing my NY 914 in VA Group: Members Posts: 1,336 Joined: 26-November 07 From: Oakton VA Member No.: 8,376 Region Association: MidAtlantic Region |
The theory is solid, so I'd suggest they should never be removed, and perhaps added as feasible.
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larss |
Jul 18 2011, 12:18 AM
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#8
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Member Group: Members Posts: 428 Joined: 10-September 09 From: Sweden Member No.: 10,787 Region Association: Scandinavia |
I thought my '72 1,7 D-jet ran a little hot, oil temp about 220F (+105C), this was during a hot summer day 86F (+30C). Fitted deflectors and ran the same road trip at constant speed (90mph) with and without them. I was surprised that the oil temp fell down to about 208F (98C) with the deflectors fitted. (My car has a dipstick temp sender which is newly calibrated at +100C so the readings should be quite accurate).
However in city traffic and low speed i doubt there is any sigificant effect from them. Belive me I will keep the deflectors fitted... /Lars S |
MikeSpraggi |
Jul 18 2011, 12:25 AM
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#9
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Senior Member Group: Members Posts: 781 Joined: 7-February 05 From: Silver Spring, Md Member No.: 3,570 Region Association: MidAtlantic Region |
Would they make a difference for a stock /6?
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Prospectfarms |
Jul 18 2011, 06:47 AM
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#10
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Member Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest |
Does anyone have a photograph or schematic of these deflectors they could post?
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johannes |
Jul 18 2011, 07:41 AM
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#11
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Club Porsche 914 France President Group: Members Posts: 3,084 Joined: 13-January 06 From: France Member No.: 5,409 Region Association: France |
Does anyone have a photograph or schematic of these deflectors they could post? http://www.914world.com/bbs2/index.php?showtopic=102763 (IMG:style_emoticons/default/type.gif) |
pcar916 |
Jul 18 2011, 07:47 AM
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#12
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Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None |
Would they make a difference for a stock /6? Yes, anything that helps the cooling fan push air from the top is going to help. in fact, they should probably go all the way across rather than simply target the cylinders. But that would take a little wind-tunnel work to check that theory out. They do occasionally get scraped during a curb high-side, but better cooling that doesn't cost you a bunch of horsepower is always a good thing. Keep the flaps! I'm using the same effect on my front oil cooler outlet. The only low pressure areas on the car are either at the front (right behind the bumper) and anywhere else where a "thing" sticks up and creates one behind itself. OT a little: Now, from a road-holding perspective a partial vacuum under the car would be the best... in the areas we select, of course. That would be everywhere except where air needs to cool, like the transaxle. A good example is the Chaparral Can-Am car from the '60s early '70s. Those guys were seriously after low pressure. It was eventually banned from competition because nobody could keep up with it in the corners and, or so I've heard, it was a little hard on the tracks. I doubt the last one a bit, but if all cars were vacuum cleaners... http://www.google.com/search?q=Chaparral+C...070&bih=730 |
MikeSpraggi |
Jul 18 2011, 04:03 PM
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#13
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Senior Member Group: Members Posts: 781 Joined: 7-February 05 From: Silver Spring, Md Member No.: 3,570 Region Association: MidAtlantic Region |
Would they make a difference for a stock /6? Yes, anything that helps the cooling fan push air from the top is going to help. in fact, they should probably go all the way across rather than simply target the cylinders. But that would take a little wind-tunnel work to check that theory out. They do occasionally get scraped during a curb high-side, but better cooling that doesn't cost you a bunch of horsepower is always a good thing. Keep the flaps! I'm using the same effect on my front oil cooler outlet. The only low pressure areas on the car are either at the front (right behind the bumper) and anywhere else where a "thing" sticks up and creates one behind itself. OT a little: Now, from a road-holding perspective a partial vacuum under the car would be the best... in the areas we select, of course. That would be everywhere except where air needs to cool, like the transaxle. A good example is the Chaparral Can-Am car from the '60s early '70s. Those guys were seriously after low pressure. It was eventually banned from competition because nobody could keep up with it in the corners and, or so I've heard, it was a little hard on the tracks. I doubt the last one a bit, but if all cars were vacuum cleaners... http://www.google.com/search?q=Chaparral+C...070&bih=730 Another reason for the ban on the Chaparral "Sucker" car was that it left a lot of dust an debris in its' wake due to the snowmobile powered fans. The other drivers were complaining about the effects of literally having to eat the Sucker car's dust. |
Prospectfarms |
Jul 18 2011, 06:14 PM
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#14
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Member Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest |
Merci beaucoup! (IMG:style_emoticons/default/smile.gif) Does anyone have a photograph or schematic of these deflectors they could post? http://www.914world.com/bbs2/index.php?showtopic=102763 (IMG:style_emoticons/default/type.gif) |
Drums66 |
Jul 19 2011, 02:00 PM
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#15
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
.....Yes they do make a difference in air flow! (IMG:style_emoticons/default/flag.gif)
(IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/bye1.gif)(back yonder) |
Tom_T |
Jul 22 2011, 12:49 AM
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#16
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TMI.... Group: Members Posts: 8,318 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California |
So only installed on post 73 cars ? ... Yes, 73-76 only. And the way I heard it from dealers back in the day, it started in order to keep the 2.0 H-4s cooler with the extra power & displacement, and added to 1.7s & 1.8s to run them a bit cooler as well. Mark W. & the others above explained how it works well already. |
Mikey914 |
Jul 22 2011, 01:45 AM
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#17
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
I have a prototype that will be ready this next week. A little different, but just as effective and durable.
-Mark |
MikeM |
Jul 22 2011, 11:21 AM
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#18
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Senior Member Group: Members Posts: 564 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada |
Mark...please let us know when they are ready...definately interested.
Mike |
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