I'm starting to get a picture of what I intend to do during the rebuild of
my engine. I'm still undecided (or unsure) of a few points, and am
interested in the list's opinion:
-Compression ratio: The comp prep manual suggests 10.2:1 for a street
engine. I'm going with a cam that is a step down from the "D" grind (270
duration vs. 284, a bit less lift). Would a C/R around 10 be any problem
with today's gas (I would run premium)? Can a C/R be too high for a given
cam? The one I'm going to use says 9:1 minimum, but nothing about ideal or
maximum.
-Lightening: The comp prep manual shows where to shed quite a bit of weight
from the rods. I won't be rev'ing over 5000 (not going to install the
harmonic damper kit), is lightening the rods still beneficial? Same
question for the rocker arms.
-Alloy sump: Seems like "everyone" used to carry these, now only
Racetorations & BFE still seem to (for big $$). Anyone know of another
source?
Chromoly pushrods: I'm probably going to get new pushrods. Are chromoly
pushrods stronger or lighter than stock? Or both?
Header: I'm still undecided on using the stock TR4A manifold or a header.
One issue is the heat. Do the ceramic coatings really work? I might do
that even on the stock manifold. Does everyone supply the same headers, or
is one better than the others?
That's it for now, sure I'll have more as I go along!
--
Darrell Walker
66 TR4A IRS
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