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 > Porsche 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
twin plugged targa's Avatar
 
Join Date: Nov 2000
Location: S. France
Posts: 1,447
Garage
Crane Cams - anyone used them?

Has anyone used crane cams in their cars?
My 2.7 has a crane cam I am told.
I have visited the web site and they only show 3 possible cams for 2 litre 3 litre and 3.2 litre.
I am guessing mine is this one as the performance takes off after 4K revs. Any other way of knowing from the outside?

here are the specs:

Part Number: 520-0012 Grind Number: P-306
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1965 Up PORSCHE 6 Fair idle, moderate performance usage, good mid-range horsepower. Basic RPM 4000-6800
Engine Size Configuration
1991 C.C.

Valve Setting: Intake 0.1 MM Exhaust 0.1 MM COLD

Lift: Intake @Cam 8.49 MM @Valve 12.55MM All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 7.96 MM @Valve 11.73MM
Rocker Arm Ratio I-1.477/E-1.475

Cam Timing: VALVE @.305 MM
Lift: Opens Closes ADV Duration
Intake 51 BTDC 75 ABDC 306
Exhaust 66 BBDC 42 ATDC 288

Spring Requirements: Triple Dual Outer Inner
Part Number --
Loads Closed -- LBS @ -- or --
Open -- LBS @ --
Recommended RPM range with matching components
Minimum RPM 4000
Maximum RPM 6800
Valve Float --

Cam Timing: VALVE @1.0 MM
Lift: Opens Closes Max Lift Duration
Intake 34 BTDC 58 ABDC 102 272
Exhaust 49 BBDC 25 ATDC 102 254

Whatever all that means
rgds ben

__________________
AKA "86ragtop" 1986 911 Carrera SOLD 11/2001
1971 911T Targa - twin plugged 2.7 230HP SOLD! 2/2008
1970 911T - ivory white -SOLD 2/2012
Current car:
1987 930 RUF BTR clone
Old 01-31-2004, 07:35 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
twin plugged targa's Avatar
 
Join Date: Nov 2000
Location: S. France
Posts: 1,447
Garage
Hmmm.. guess noone uses Crane Cams

Ok, anyone know if there is anyway that I can tell from the outside , which cams I have?.
please excuse if this is a daft question.

Also I can tell a huge change in engine tone at 4K+ revs, which I was sure was detonation.
A friend told me that a rough Porsche engine that sounded like a can of dried peas in a can at idle was that way due to race cams.

Do race cams make the engine sound rattly at idle or is it possible that the cams I have are making rattle noises at higher revs?

Again sorry if this question is daft, I am just fishing for hopeful easy answers which are not going to cost $$$$$$ in rebuilds
Rgds Ben
__________________
AKA "86ragtop" 1986 911 Carrera SOLD 11/2001
1971 911T Targa - twin plugged 2.7 230HP SOLD! 2/2008
1970 911T - ivory white -SOLD 2/2012
Current car:
1987 930 RUF BTR clone
Old 02-01-2004, 08:06 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Plavan's Avatar
 
Join Date: Apr 2002
Location: Clovis, CA
Posts: 2,802
Garage
I have the exact same P-306 cams in my racecar. Good balance of power and torque. I do not rev my race car over 7300k (well sometimes ) so this was the perfect choice for my race motor.
The only way to check it is to yank the cams out.
__________________
Chad Plavan
911ST Race Car/2.5L SS Race Motor #02
1972 911T- Numbers matching- Restoring to stock
2011 Porsche Spyder Wht/Blk/Carbon Fiber Buckets/6-Speed (Sold)
2016 Elan NP01 Prototype racecar- Chassis #20, #02

Last edited by Plavan; 02-01-2004 at 10:33 AM..
Old 02-01-2004, 08:57 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Hilbilly Deluxe
 
emcon5's Avatar
 
Join Date: Nov 2000
Location: Reno
Posts: 6,486
Garage
You can degree them, but not with the engine in the car.

Details here:
Webcam, real or fake

Ben, you really need to do some detective work, and find out who built the engine, and what he put in it.

Looking at jluetjen's chart, that is a pretty hot cam, higher lift/duration than a 906.



Tom
__________________
82 911SC Coupe
GTI Cup #43
Old 02-01-2004, 10:26 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
dtw dtw is offline
GAFB
 
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,837
I have Crane P-288s in my 2.4 sleeper motor. One of 'em, can't remember which, has a stamping in the end of the cam for ID purposes. Pull your chain covers and see if yours do, too.

After spending a lot of time with modified Porsche engines, I can't say I've ever heard a healthy one sound the way you describe. Before worrying about $$$ for rebuilds, I'd go over the basics and gather some facts. Check valve adjustment, look for exhaust leaks, broken head studs, etc.

__________________
'72 911T Silver
'01 996tt Lapis Blue
Lots of BMWs
Old 02-01-2004, 11:42 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 05:57 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 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.