Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 Engine Rebuilding Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
Join Date: Feb 2004
Location: UK
Posts: 2,230
RSR Cylinder Heads

I have recently been told, but have not seen, that RSR heads were modified with an 'oil gallery' to lubricate the exhaust valve guide but I must say I find it difficult to believe,

I am told that there is a 'pocket' machined as marked in red machined and then a fine drilling is made into and through the guide.

If this is true there must also be mods to the cam cariers?



Anyone seen anything like this?

Old 08-04-2010, 06:19 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
BURN-BROS's Avatar
 
Join Date: Jun 2003
Location: Camarillo, Ca.
Posts: 2,418
Hi Chris,

That mod was done on the 935's and really for one part of one track(mulsanne straight). For prolonged boost. Normally aspirated engines did not have this done.

My guess is that a privateer modded a set(s) with the thinking that they would gain some advantage.
__________________
Aaron. F.S. 1965 Solex engine w carbs/cleaner
Burnham Performance
https://www.instagram.com/burnhamperformance/
Old 08-04-2010, 06:45 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Max Sluiter
 
Flieger's Avatar
 
Join Date: Mar 2006
Location: So Cal
Posts: 19,644
Garage


More info on the Turbo Fourm if you do a search.
__________________
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
Old 08-04-2010, 08:58 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered
 
Join Date: Feb 2004
Location: UK
Posts: 2,230
As the engine we are building is normally aspirated and is for an Historic Endurance Rally I guess it isn't wortht he cost/risk.

Thanks for the help.
Old 08-05-2010, 12:42 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
juicersr's Avatar
 
Join Date: Apr 2005
Location: Wilmington,NC
Posts: 2,425
Garage
I always found this mod an interesting anecdote in the racing history of these motors.

Seems like i also remember seeing somewhere some trick 935 heads that had small oil lines tapped into them as well to try to improve cooling... u wouldnt happen to have a pix of these also wouldja Max?
__________________
'79 930/934 replica
80 RSR-look(Now in Sicily)
914/6 2.7 (Projekt 908/3)
1965 Karman Ghia-Class winner 2007 Carrera Panamericana/Ducati 900ss/GhezziBrian STW
D-Zug Produkte/D-Zug.com
Old 08-06-2010, 01:51 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Max Sluiter
 
Flieger's Avatar
 
Join Date: Mar 2006
Location: So Cal
Posts: 19,644
Garage
Sorry, no photos. 935s used both center-lubed cams and the spray bars.
__________________
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
Old 08-06-2010, 03:15 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Max Sluiter
 
Flieger's Avatar
 
Join Date: Mar 2006
Location: So Cal
Posts: 19,644
Garage
Heres a type 916 for you, though.

__________________
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
Old 08-06-2010, 03:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Reply


 


All times are GMT -8. The time now is 04:05 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.