Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Porsche 356 fan cover plate - what's it for?
Forum Index -> Porsche - 356 Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
Mr Fish
Samba Member


Joined: February 16, 2007
Posts: 23
Location: Gloucestershire, UK
Mr Fish is offline 

PostPosted: Tue Nov 15, 2022 2:34 am    Post subject: Porsche 356 fan cover plate - what's it for? Reply with quote

Hello

Can anyone tell me what the purpose of the Porsche 356 fan cover plate/disc is ? - it's the smaller one that sits just behind the fan itself? I know that the same era VW engine do not have this disc which has got me thinking as to what it does?
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Starbucket
Samba Member


Joined: April 30, 2007
Posts: 3514
Location: WA
Starbucket is offline 

PostPosted: Tue Nov 15, 2022 5:05 pm    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

Can you post a picture I know some early 356's mounted a oil cooler loop in front of the fan intake.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Mr Fish
Samba Member


Joined: February 16, 2007
Posts: 23
Location: Gloucestershire, UK
Mr Fish is offline 

PostPosted: Wed Nov 16, 2022 2:07 am    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

Image may have been reduced in size. Click image to view fullscreen.


hi, its number 56 in the diagram

any ideas?
Back to top
View user's profile Send private message Gallery Classifieds Feedback
alanhall
Samba Member


Joined: February 18, 2006
Posts: 105
Location: Northern California
alanhall is offline 

PostPosted: Wed Nov 16, 2022 8:08 am    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

I believe the plate is for fan noise reduction.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
Starbucket
Samba Member


Joined: April 30, 2007
Posts: 3514
Location: WA
Starbucket is offline 

PostPosted: Wed Nov 16, 2022 3:45 pm    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

I've got a gen./fan. assy on the shelf but there is a lot of stuff in front of it right now but my guess is it blocks the air that is drawn in from escaping through the lighting holes in the fan assy.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
James Davies
Samba Member


Joined: September 24, 2013
Posts: 138
Location: Baltimore, USA
James Davies is offline 

PostPosted: Wed Nov 23, 2022 8:02 am    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

As Starbucket indicates, the purpose of the plate is to cover the holes in the fan assembly and provide better cooling.

This plate was introduced in Jan 1954 along with the new 160 watt generator and 160 watt under-the-dash regulator, an upgrade over the 130 watt gen/regulator that was shared with VW up until that point. The new generator and regulator combo produced more heat and needed better cooling. And this was the solution. There's a Porsche Service Bulletin that describes this (5/54).
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Bub
Samba Member


Joined: June 10, 2004
Posts: 1020
Location: Central Washington
Bub is offline 

PostPosted: Tue Nov 29, 2022 4:00 pm    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

James Davies wrote:
As Starbucket indicates, the purpose of the plate is to cover the holes in the fan assembly and provide better cooling.

This plate was introduced in Jan 1954 along with the new 160 watt generator and 160 watt under-the-dash regulator, an upgrade over the 130 watt gen/regulator that was shared with VW up until that point. The new generator and regulator combo produced more heat and needed better cooling. And this was the solution. There's a Porsche Service Bulletin that describes this (5/54).


Does anyone have any data to show that covering the holes vs leaving open has ANY measurable effect on cooling?
Back in the olden times at a 'round table' discussion I attended w/ Mr Pellow he said the holes made no difference except for the noise. The VW had them to create fan noise to deter people from revving the 36hp too much. Not so much an issue in the 356, being better built AND having a tacho right off the lot.
Curious because there are early 14 and 28 blade fans that both have the holes and some that don't.
_________________
hitest wrote:
Had a girlfriend once who shall we say, nearly arrived at the mere sight of a semaphore in action- easy to please she was...
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
wagen19
Samba Member


Joined: November 16, 2007
Posts: 6
Location: germany
wagen19 is offline 

PostPosted: Wed Nov 30, 2022 12:36 am    Post subject: Re: Porsche 356 fan cover plate - what's it for? Reply with quote

Bub wrote:
James Davies wrote:
As Starbucket indicates, the purpose of the plate is to cover the holes in the fan assembly and provide better cooling.

This plate was introduced in Jan 1954 along with the new 160 watt generator and 160 watt under-the-dash regulator, an upgrade over the 130 watt gen/regulator that was shared with VW up until that point. The new generator and regulator combo produced more heat and needed better cooling. And this was the solution. There's a Porsche Service Bulletin that describes this (5/54).


Does anyone have any data to show that covering the holes vs leaving open has ANY measurable effect on cooling?
Back in the olden times at a 'round table' discussion I attended w/ Mr Pellow he said the holes made no difference except for the noise. The VW had them to create fan noise to deter people from revving the 36hp too much. Not so much an issue in the 356, being better built AND having a tacho right off the lot.
Curious because there are early 14 and 28 blade fans that both have the holes and some that don't.


Comparing VW:
from 1949 on, there were 4 types of fans:
a) 16 blades with holes for Limas 90 mm diameter
b) 28 blades with holes for Limas 90 mm diameter
c) 28 blades without holes for Limas 105 mm diameter
d) 28 blades wide, without holes, for dual port engines, 105 mm Limas only

https://www.volkswagen-classic-parts.com/catalogues/Kaefer-1971/html5.html#/120

Beside: there is a difference in Lima housing 160 W, VW and Porsche
Back to top
View user's profile Send private message Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Porsche - 356 All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2020, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB