|
|
|
|
| Author |
|
|
Registered
Join Date: Sep 2004
Location: Woking, McLaren-land
Posts: 681
|
What does cc'ing a head involve?
My car currently undergoing a topend rebuild. Then engine builder said that the heads 'cc'd at 89.8' - what does this mean exactly?
Also said my CR is 10.45:1 (euro spec + some machining of barrell to head face) Any thoughts please?
__________________
Shirish 1987 Carrera, Granite Green |
||
08-07-2008, 12:29 PM
|
|
|
Moderator
Join Date: Dec 2001
Posts: 9,569
|
Bouffant hairdos, Miranda, Grace Slick and THESE HEADS
89.8 must be your combustion chamber volume. I think 10,45:1 means you should have twin plugs if not already installed. Milling the head is not a good way to increase compression ratio.
__________________
'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
||
|
08-07-2008, 12:32 PM
|
|
|
Registered
Join Date: Sep 2004
Location: Woking, McLaren-land
Posts: 681
|
thanks John!
Car is single plugged, but I'm guessing 10.45:1 is borderline on a RoW UK based car, even with 98/98 Ron fuel.
__________________
Shirish 1987 Carrera, Granite Green |
||
|
08-07-2008, 12:36 PM
|
|
