Oiling, Cooling, and Fuel
 Oil
Pumps and Drive Shafts
Last month we ended with installing the oil pump. Before
we get into the top end of the engine, we'd like to mention
a couple points that we didn't get to last time. We had
selected a stock pressure and volume oil pump
A hardened oil-pump shaft
is highly recommended.  |
for our motor. Although it has
been popular to use high pressure and high volume pumps
for performance buildups, it is actually not neccesary,
and may do more harm than good. Unless you are running
greater bearing clearances or a deep-sump oil pan, you
don't need more than the stock pump.Not only does it require
more power to drive a high volume pump, it also places
stress on the oil pump shaft, distributor gear and bearings.
Small block Fords have a notorious problem of twisting
and breaking the oil pump drive shafts (see right).
A worthwhile and cheap upgrade is to purchase the ARP/Ford
Racing Parts heavy-duty oil pump shaft. We recommend this
over the typical "hardended" shafts that are included
with most aftermarket oil pump shafts.
Oil
Dipsticks
Tap and plug the dipstick
hole on 5.0L blocks. |
Late model 302/5.0L roller blocks
had the oil dip stick in the side of the block rather
than in the timing chain
cover as on early 289/302 engines.
Since we are planning to put this engine in an
early model Mustang, using an early style pan and timing
cover, we needed to plug this hole. The easiest way to
accomplish this is by tapping it for a screw in plug.
Some folks simply put a wooden dowel in the hole, but
this is the time to do it right. Last thing you want is
a gusher upon initial startup!
Windage
Tray
We should also mention a few words about oil control.
In a wet sump system, the crank swings through the oil
sitting in the pan. At high
Windage trays are cheap and
easy horsepower.
|
engine speeds weight of the
oil on the crank creates tremendous drag on the crank,
which robs horsepower. Any
sort of oil control, be it a baffled oil pan, or a crank
scraper or windage tray is benefitial. Some engine builders
claim windage trays to be worth 10-15 horspower at high
rpms. Since we already had one in another motor, we figured
it would be worth the trouble to drop the pan and put
it on the 302. Note that if you are using main studs you'll
need to purchase from ARP special studs with threaded
extensions for the windage tray. Otherwise, most trays
come with special bolts with threaded heads.
Fuel
Pump Eccentrics
Two piece fuelpump eccentric. |
There
are two
types of fuel pump eccentrics for small block
Fords, a one piece
and a two piece.
The one piece centers on the camshaft dowel pin while
the two piece has a tab which centers in the dowel hole
of the timing chain cam gear. Most new cams come with
a short and a long dowel in the box so you can select
the appropriate one for your eccentric.
However, you only
need to worry about eccentrics if you plan to use a mechanical
pump. Otherwise you can leave it out.
Water
Pumps
Cooling
a high horsepower engine is something worth giving serious
High flow waterpump |
consideration
too. Higher output of power also means higher output of
heat. The project car which recieved this motor will get
a new three or four core radiator for sure. On the engine
itself we have selected an aftermarket high performance
waterpump. The FlowKooler waterpump utilizes
a modified
impelled to achieve an increase in flow of 30% over a
stock pump. The pump is also
aluminum, which shaves nearly 5 lbs. off the front end
compared to an early iron waterpump. |
 (Part
II: The Top End) |
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