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 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
Cam timing

I'm installing 964 Cams in an '87 930 and I'm asking opinions on cam timing.

The cams are freshly reground Webcam #40 which is their 964 profile.
The car is street driven and I would like to have as much low and midrange power as possible with these cams without giving up too much power at the upper end if possible.

I know you can't have both without variable cam timing like in a newer car, but would like to get the best compromise possible with the 964 cams.

Webcam suggests a timing of 1.25mm with .10mm lash, and I just want to get some opinions from others who have already done it.

The car has B&B headers and muffler, Garretson long neck intercooler, K27HFS turbo, 1 bar wastegate spring, Brian Leask's adjustable control pressure regulator, and Imagine Auto modified fuel head.

New rocker arms and shafts, timing chains, sprockets and ramps are going in with the cams too.

thanks in advance,
Jim

Old 10-03-2008, 08:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Cynical Misanthrope
 
AFM744's Avatar
 
Join Date: Dec 2001
Location: Campbell, CA
Posts: 382
Send a message via Yahoo to AFM744
Sorry, just a "Me Too" subscribe as I'm putting in the same cams. I thought the debated-to-death agreement was 1.7mm.
Can I respectfully ask if you're running a wideband with all these mods? If the other stuff didn't put you outside CIS capacity these cams should, no? Again, respectfully. I'm going back to a stock WG spring when I reassemble until I get my EFI done as I don't believe the CIS will fuel with my headwork, cams, and C/R I'm putting in.
__________________
X-1, AFM744, Jon, '92 C2 Turbo
JE 8:1 pistons, 964 cams, 38mm intakes ported/polished/twinplugged, ARP hardware, B&B headers/exhaust, 355whp. Full-blown GT35R 3.2 intake EFI pending...
Where my misspent time and money is currently going.
Old 10-03-2008, 02:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
David's Avatar
 
Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 11,221
Garage
I'm curious who's running them at 1.7mm. Mine are set at 1.26mm.
__________________
2014 Cayman S (track rat w/GT4 suspension)
1979 930 (475 rwhp at 0.95 bar)
Old 10-03-2008, 03:19 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered
 
Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
Quote:
Originally Posted by AFM744 View Post
Sorry, just a "Me Too" subscribe as I'm putting in the same cams. I thought the debated-to-death agreement was 1.7mm.
Can I respectfully ask if you're running a wideband with all these mods? If the other stuff didn't put you outside CIS capacity these cams should, no? Again, respectfully. I'm going back to a stock WG spring when I reassemble until I get my EFI done as I don't believe the CIS will fuel with my headwork, cams, and C/R I'm putting in.
Yes, I'm using and Innovate LC-1 with the G3 gauge.
These cams were in the motor when I bought the car, but a clogged cam spray bar on the right side, or passenger side of the car and the scoring and heavy wear on the cam lobes and rockers led to me doing all this.
Old 10-03-2008, 03:46 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Cynical Misanthrope
 
AFM744's Avatar
 
Join Date: Dec 2001
Location: Campbell, CA
Posts: 382
Send a message via Yahoo to AFM744
Maybe I have no idea what I'm talking about (it happens). 1.7 somehow popped into my head (no pun intended) and I regurgitated it. Obviously I'll be re-researching this judiciously before timing my cams.
__________________
X-1, AFM744, Jon, '92 C2 Turbo
JE 8:1 pistons, 964 cams, 38mm intakes ported/polished/twinplugged, ARP hardware, B&B headers/exhaust, 355whp. Full-blown GT35R 3.2 intake EFI pending...
Where my misspent time and money is currently going.
Old 10-03-2008, 03:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Wo ist die Rennstrecke?
 
DonE's Avatar
 
Join Date: Mar 2004
Location: St Johns, FL
Posts: 1,210
I set mine to 1.26mm but I like mine advanced because its mostly a street machine. If it were a track car, I probably would have set it to 1.0mm for the top end. 964 cams are good all around cams and advanced to 1.25/6mm keeps the lower CR engine sharp at lower rpm. I now run GTII EVO's.

Old 10-03-2008, 04:28 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
Reply


 


All times are GMT -8. The time now is 05:33 PM.


 
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.