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RE: Edelbrock head observations

To: "'derekw@zamnet.zm'" <derekw@zamnet.zm>, tigers@autox.team.net
Subject: RE: Edelbrock head observations
From: "Smit, Theo" <theo.smit@intel.com>
Date: Thu, 16 Nov 2000 08:22:44 -0800
Hi Derek,

I have a pair of Wilwood dynalite calipers and 10.25 x 0.75" rotors on order
right now. My goal is a bolt-on installation that fits stock (LAT-70)
wheels, and that allows the steering knuckle pivots (tie rod ends) to be
moved outboard slightly. The rotors will likely have to be turned down to
10" but I will decide that when I get them. I will put drawings etc.
together and I can probably do (or get done) adapter machining for those
that want to duplicate it. I hope no one's in a hurry...

I know that if you go to larger rim sizes you can fit a lot more brake in
there, but I like the LAT-70's so I will put up with some compromises to
keep them. We'll see how long I keep that attitude 8) .

Best regards,
Theo

-----Original Message-----
From: derekw@zamnet.zm [mailto:derekw@zamnet.zm]
Sent: Tuesday, November 14, 2000 1:33 AM
To: tigers@autox.team.net
Subject: Edelbrock head observations


Hi all,

Now that I am starting to build the engine, I thought I'd let you in on some
observations. 

My Edelbrock Performer RPM heads arrived with some inlet bowl blending and
some smoothing of the inlet ports. The exhaust ports/bowls (obviously less
critical for breathing) just had the CNC gasket matching done-- I removed
some casting ridges and smoothed things out. 
The combustion chambers had some very sharp machining corners/edges
including a few sharp edges on the outsides of the valve seats (where they
protruded slightly from the cast aluminium. I smoothed these to reduce
pre-ignition (the fuel here is sometimes dodgy.)

When removing the valves, 3 of them had some metallic debris on their
stems-- my guess is that the guides were reamed but not cleaned properly. I
would never "bolt on" something without checking it first and often I'm glad
I did! I care far more about my engine than whoever put the heads together.

Thanks for those who replied about which way the rods face-- the side of the
rod journal with the bigger chamfer faces the side of the crank journal
(smaller chamfer faces the other rod.) Monroe's book doesn't mention this.

Has anyone on the list put Wilwood disks and calipers at the front? What
disks/calipers did you use? I've got Ford Sierra/Saphire rear calipers and
Peugeot 504 rear disks for the back and will report on that when finished.

Off to plastigage all my journals...

cheers, derek

Derek White
Managing Director
Zikomo Brewing Company
Box 31730, Lusaka, Zambia
Tel:260 1 286580/85
Cell: 260 1 702694
Fax: 260 1 238020

Brewing, beverage and food processing plants,
sanitary and aircraft welding and fabrication.

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