64cc for the 4.7L head.
Comparatively speaking, the valves sizes are not to bad for a 287 cubic inch
engine.
1.89" and 1.46"
.600 lift cam???? hee heee thats funny!!! what are ya going to do with a
.600 lift cam???
__________________________________
Matt -- Mechanicsville, VA
`00 Sport Plus 4.7L 5spd. 9 1/4 3.92 LSD
RC 2x4 Homemade intake & K&N open element,
Traction Bars, Spring clamps, ...
BEST 1/4 14.871 @ 91.01 MPH
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
-----Original Message-----
From: Stlaurent Mr Steven [mailto:STLAURENTS@mctssa.usmc.mil]
Sent: Wednesday, March 01, 2000 11:12 AM
To: 'dakota-truck@buffnet.net'
Subject: DML: RE: RE: Forged Pistons question-4.7L pistons Tim L.
Tim, what is the CC of the head chamber? Is there room for larger intake
valve? It looks the cam needs higher lift also? I still haven't found any
resources for a .600 lift cam. Any resources? I left an e-mail to Mopar
but no reply yet? To include the 10.5 CR pistons (.30 over).
-----------------------------------------------------------------
Steven St.Laurent
Test Engineer
Test Branch, GSD,MCTSSA
MARCORSYSCOM, US Marine Corps
mailto:stlaurents@mctssa.usmc.mil (work)
mailto:Saint1958@home.com (home)
Office: (760) 725-2296
-----Original Message-----
From: Tim J Koth [mailto:Tim.J.Koth@aexp.com]
Sent: Tuesday, February 29, 2000 3:39 PM
To: dakota-truck%buffnet.net
Subject: DML: RE: Forged Pistons question-Sam 4.7L pistons
Matt! I'm crushed!! The article you scanned for the web site has some
info
about the timing chain setup on the 4.7 and a picture. Basically there is a
chain thats driven off of the crank and goes to an idler in roughly the same
location as the cam would be on a pushrod engine. That idler then drives two
chains that power the camshafts at the heads with automatic tensioners.
"Both
cylinder heads use a .443"/.429" split-lift intake/exhaust; 244/254 degree
split duration intake/exhaust camshaft with 18 degree overlap. " But it is
not
a double in that there is not a double thickness of chain for each driven
sprocket. The cams each operate a set of needle-bearing roller rocker arms,
with opposite-end hydraulic lash adjusters acting as the fulcrum. The intake
and exhuast rockers are opposite each other almost like a Hemi. The intake
valves are 1.89" and the exhaust are 1.46". The pistons are moly coated to
reduce break-in scuffing with cylinder roundness being held to .00015" and
taper to .0006". There is an integral windage tray and there are no main
caps. Instead the crank is held in place with what Dodge calls a 'deck
plate'.
A large cast iron assembly that bolts to the crankcase base with about 20
bolts thereby clamping down all 5 main bearings at once.
Sorry, went a little over-board there... I can see that once this engine
gets more popular, you will probably see some pretty wild performance gear
available for it!!
-------- Previous post -----------
Date: Tue, 29 Feb 2000 12:14:24 -0800
From: "Barret, Matt" <MATT_BARRET@earthtech.com>
Subject: DML: RE: Forged Pistons question-Sam 4.7L pistons
4.7L pistons are Cast Aluminum, Moly rings, compression ratio is 9.3:1!!
I haven't seen any info on the timing chain , don't know if its single or
double?
__________________________________
Sent: Tuesday, February 29, 2000 3:02 PM
To: 'dakota-truck@buffnet.net'
Subject: DML: Forged Pistons question-Sam
Sam, do you know the pistons in the 4.7 are forged or not? And the timing
gears-single or double?
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:49:30 EDT