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Download Injector
Sizing Excel Spreadsheet |
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Planned
engine is a 347 -- Probe forged 0.030 pistons and Scat
9000 cast crank, with AFR 185 heads, .005 deck height,
Competition Cams XFI Stroker
Cam: XFI 236HR-14, Duration 286/300, Duration
@.050 236/248, Lift .579. 30 Lb injectors,
Pro-M 75 mm Mass airflow and 75 mm throttle body,
Trick Flow Track Heat EFI Intake, A9L computer.
A Fidanza aluminum flywheel, Zoom HP48-1 Kevlar clutch,
and Levy Racing T5 will put power to the ground. Calculated
compression ratio is 10.78:1 static, 9.41 dynamic |
My calculations
indicate we'll have to run the 30 lb
injectors at 55 PSI to get
maximum power out of this setup. Might have to pick
up some 36 lb injectors in the future.
Update 15
Oct 06: New setup is a
carb and Victor Jr Manifold, EFI is history.
Desktop
Dyno put the carb combo at 537 HP.
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11
Dec 05 Engine Teardown
Don't forget
the two upper intake bolts under the nameplate, the
screws holding the nameplate were badly corroded and
I had to drill the heads off them to get the name plate
off.
No sludge
here, just a little varnish. The engine had 71,000 miles
on it. The cross hatching is still clearly visible on
the cylinder walls. I almost hate to rebuild it -- almost.
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Use a puller
to remove the balancer, remove the center bolt, remove
its washer, then reinsert the bolt without the washer
so the puller bears against the bolt head and not the
crank. The balancer will slide off over the bolt. That
way, you won't bugger up the end of the crank, especially
if you are going to reuse it.
The timing
chain is not stretched much either.
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17
Dec 05 Engine
We pre-fit
the main stud girdle and oil pump pickup. A little metal
had to be ground off the girdle to clear the oil pump.
Some folks swear by a girdle while some think it has
no effect, but it won't hurt either. If you install
one, be sure the top of the main bearing caps do NOT
hit the girdle, you may have to sand the caps a little.
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We also
started removing the casting flash, deburring,
and chamfering the sharp edges of the block before
it goes to the machinist -- the less work I have to
pay for, the better. The flash and sharp edges are stress
raisers and have no place in a high performance engine.
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There is
about 3 /16" clearance between the new pickup and
Quality Roadsters oil pan. The gasket will increase
the clearance a little more, to just over 1/4". Ideally
the clearance should be 1/4" to 3/8" Some folks use
clay, but a ruler works just as well to determine the
clearance. |
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23 Dec 05 More Engine
Here's
the lower cylinder walls before the block was clearanced
for the stroker crank
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The
block is ready to go to the machinist,
Dennis Mitchell Racing Engines after the holiday.
Check out the cool little engine stand, an eBay
special, -- $30 + shipping and some paint stolen
from my wife's crafts. It beats an old tire any day. |
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New parts
go to the machinist too! He'll need all of the rotating
parts to properly balance them. I'm going to have him
assemble the bottom end and I'll do the top.
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Forged pistons just in case we get crazy and feel the
need to add a little nitrous. |
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21 Jan 06 Engine Back!
The flywheel
and block shield gets mounted so we we only have to
put it in the engine stand once.
Here's
the lower cylinder walls after clearancing for the stroker,
not much material had to be removed.
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Blacks painted
with POR Engine paint, new Melling standard volume/
pressure "Performance" oil pump is installed. If you
look closely at the pump, the drive shaft goes clean
thru the pump to give more support. The pump is a Melling
#10687 and yes
we used
an ARP chromemoly shaft.
We had to
readjust the pickup a little, the instructions for the
Quality Roadsters oil pan call for 1/2" of clearance.
The oil pan crank scraper also had to be massaged to
clear the girdle.
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The water
pump extra inlet was drilled and tapped for a stainless
steel plug. Notice we kept the larger inlet to
make connecting it to the manifold easier!
I'll have
to make brackets for the alternator and Escort fuel
pump. I was hoping to only fab one set of brackets.
I purchased a Summit bracket and was planning on making
a matching PS bracket, but the alternator bracket won't
work with the '95 cover.
Update:
I decided to swap out the timing cover and water pump
for older model year stuff; fabricating the brackets
will be a bear with the '95 set up. There is just nor
enough space in the front of the engine for the accessories.
I anticipated a problem here, which is the reason I
assembled the front of the engine so soon!
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Ready for
other assembly. I still have yet to purchase the
AFR heads.
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28 Jan 06 Timing Cover
Swap |
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The '95
timing cover and water pump has been changed for an
93 and earlier setup. See above.
Click here for
details. |
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23 Apr 06 AFR 185
Heads |
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After over
a month of waiting, I finally got the heads, now I need
to install them. I had the springs upgraded to support
a higher lift cam. |
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I replaced
the stock AFR rocker arms studs with ARPs -- part number
134-7104. There have been some issues with the stock
AFR studs breaking, so this was cheap insurance. $30
for a set of 16. If I had to do it over, I would go
with 7/16" studs, but I already had the rockers and
a stud girdle. |
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The longer stud on the left is the ARP stud;
it's designed for use with stud girdles. The
smaller head provides more clearance for the
large rocker arms. |
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Using Comp
Cams HI-Tech push rod checker, I determined that I needed
6.45 inch pushrods. The mark is right in the center
of the valve stem where the rocker rubbed it clean.
If the mark is off to the center of the engine, the
pushrod is too short.
I also
checked for spring coil binding by inserting a paper
clip between the coils when the valves were full open,
no problems, plenty of clearance. Used the same paperclip
to check for clearance between the rocker arm slot and
stud, so it does not bind at the extreme edge of travel.
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Here is
the setup I used to check piston to valve clearance.
The exhaust was .200 and the intake .150 at their
closest points. In addition, I checked it every 15 degrees
or so. I made a checking lifter following
Trick Flow's instructions. |
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Front of
gasket mates with front of engine. You'd be surprised
how many people get this wrong.
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The lifters
get soaked in oil for few days while I wait for UPS
to bring pushrods. |
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27 Apr 06 PS Pump
Bracket |
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While I
was waiting for pushrods, I used more
CAD to mock up the bracket for the Escort power
steering pump. |
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Here the
bracket has been polished and mounted.
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30 Apr 06 Engine
Assembly |
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Assembly
continues. I installed a stud griddle from Performance
Racing Warehouse and Scorpion 1.6 roller rockers. |
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The firing
order for the CompCams Ford Stroker XFI Cam is 1
3 7 2 6 5 4 8. Its
part number 35-775-8 |
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The lower
intake was test fitted and the gasket trimmed if it
extended into the ports. The ports on the AFR heads
matched pretty close to the Trick Flow manifold. |
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Do not forget
the little filter basket for the PCV. |
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30 lb injectors
get soaked in cleaner and new O rings and filters were
also installed. After soaking, 12V power was applied
to injectors to activate them and any crud was blown
out with compressed air. |
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Won't be
long
now!
Have to make a bracket for the Mallory coil and a replacement
spacer for the EGR out of phenolic (Garolite). Also
need to fabricate brackets for the throttle cable.
The distributor
is a Mallory # 7970404. Its a little smaller than the
standard EFI distributors which will give a little more
space for the fuel system.
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13 May 06 Engine Done!
The engine
is finally finished, there may be some changes in the
hoses and details later on, but for now, its ready to
go in the car.
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I set up
the fuel rails and regulator according to the instructions
on Mallory's web site. This setup has the regulator
attached to the rails for minimum pressure drop.
I also mounted
the coil close to the distributor. The plug wires are
Accel Extreme 9003, Spiral Core, 8mm Vari-Angle Boot
plug wires. 1000 degree temperature rating at the
boot and 600 at the wire. Tough enough to take the heat
of the headers.
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Aluminum
flywheel, all I need now its the transmission -- still
waiting You can also see the Garolite spacer between
the throttle body and intake manifold. I painted it
and the 1" Trick Flow spacer black. I hope the manifold
clears the hood with the thicker spacer, if not I'll
disassemble the intake and mill the spacer down.
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29 May 06 Engine Ready
to go in car!
I test fit
the headers, good thing too, because a little bit of
the flange had to be ground off to clear the small ledge
on the AFR heads.
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In she goes.
Note
the sun umbrella, 90 + today.
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Finally!
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4
June 06 Cooling System and Air Intake
Using a
Summit Universal dual core radiator, its made by Northern
Radiator -- the same company that makes the radiators
for Tri-States, but only $150. The cap hits the frame,
bummer. I'll take it to to a welding shop and see if
they can cut off the filler neck and patch the hole.
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The welding shop did a great job removing the
cap and patching the hole. |
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Lower radiator
mount, just a piece of round steel tube with tabs welded
on the ends and covered with hose. It wanted it somewhat
adjustable. |
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A homemade
shroud made of 1/16th 6061-T4 (easier to bend
than T6) I put some strips of eDead inside the shroud
to keep it from vibrating -- not too much cause that
stuff is heavy! I also used push on weather striping
on the outside edges to seal it against the radiator
fins. |
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My engine
machinist showed me this trick, he glued everything
with 3M Weather-Strip adhesive -- freeze plugs,
the oil gallery plug under the intake manifold, and
so forth. If you read the label, its good till 300 degrees
and is recommended for gaskets. |
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I purchased
some Cool Flex clone corrugated hoses, but replaced
the cheap rubber couplers and clamps with better quality
industrial stuff from McMaster.
The over
flow tank is from eBay and the CSR T-Filler from Jegs.
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Cooler (not
cold) air intake system. I cut flaps in the fender panels,
the openings will later be covered with mesh and the
panels powder coated. Hopefully the flap will prevent
some of the spray and heavy muck thrown up from the
tire from getting on the filter. I may add another splash
shield near the filter. |
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A titanium
heat shield for the PRO-M MAF and air filter cuts down
on the radiant heat from the headers. |
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I had my
doubts if the air sucked in by the front vents off the
pavement will really be much cooler, especially here
in the South. So, I decided to give this a try. Several
folks on the on an online forum recommended
cutting holes in the inner fender to let air in
to cool the footboxes, if it cools the footboxes, it
ought to provide some cooler air for the engine too.
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10 June 06 First
Start !
Here we
primed the oiling system with a drill and priming tool.
We pushed the car outside, bled the fuel system and
it started on the fist try - amazing! Did not
run worth a crap, but it started.
We ran
into several problems.... it overheated before we could
add more water and the bottom radiator hose blew off.
Its also running very rich probably because the computer
still thinks its a stock engine.
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Had several
fuel leaks from hoses that previously tested good. I
ended up replacing two entire hoses with a Russell SS
braided line from a local speed shop. They were both
leaking at the L bulkhead fitting and I could not get
them to reseal. I also had a leak at the fuel cell bulkhead
fittings, which required dropping the fuel cell so I
could get at the interior nuts to tighten them. |
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19 June 06 Second
Start! |
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I connected
the Tweecer to the ECC and made some adjustments.
But before I did I took this opportunity to clean up
some of the fuel injector wiring. |
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Here is
the best way I could come up with to fill the cooling
system while getting most of the air out. The filler
tube is higher than all of the other openings, it worked
well, I may make this permanent with a SS ball valve
and nipple.
The
Tweecer adjustments to the ECC cured the overheating
(running to rich) but overall the engine still does
not run very well -- now it has a problem backfiring
thru the left exhaust pipe -- have to keep diagnosing,
fixing and Tweecering.
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Hole in the thermostat, rad cap off until it
ran out the in-line filler. No squeezing hoses
'cause they are SS. Closed up the system and
ran the engine till it got to operating temp,
then let it cool overnight. It only took about
a quart of water the next day after it cooled.
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7 July 06
Misc Engine stuff |
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I made the
filler permanent with a stainless steel ball valve and
3/8 x 5 1/2" stainless steel pipe nipple. I also plugged
the end of the ball valve with a stainless steel plug
in case the valve vibrates open or gets bumped. |
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I also replaced
my fuel tank breather with the OEM charcoal canister
and will connect the canister purge vavle (CANP)
to the intake and computer. The 97 degree weather we
had here overcame the
little charcoal filter I had previously installed.
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Note that
this is one emission control
that does not rob horsepower, when the valve opens
and the mixture richens, the computer thru the O2 sensors
will lean it out if needed.
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Still have
lots more tuning to do.
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10 Oct 06
Carb Conversion |
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We were
unable to get a good tune from the Tweecer, and there
is no one locally who can tune the ECC. For these and
other reasons, I decided to switch it over to a carburetor.
All of the old EFI performance parts went up for sale. |
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An Edelbrock
Victor Jr. and 750 cfm Performer carb control the fuel,
while a Pertronix Plug and Play distributor ignites
the fire. A Holly return style regulator keeps the fuel
pressure under control; we did switch the high pressure
Walbro pump out for a low pressure pump.
I actually
like the look much better than the modern looking EFI.
I choose the
Edelbrock carb
for its ease of tuning. Its pretty simple and it comes
with instructions.
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5 July 07
New Fan |
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The car
always runs on the hot side, I've been trying to do
something about it. The stock FFR fan is on the left,
aprox 1600 and a new Flex-a-lite fan at the right -
2500 CFM and quieter too. I also installed a new
160 degree thermostat, changed to oil to 10-W40 synthetic
blend and backed 2 degrees out of the timing.
With these changes, its much better, but still gets
up over 200 degrees on a hot day in traffic, which is
not too bad.
Winter projects
include a new Pertronix vacuum advance distributor and
a new fire suppression system, the old bottle (actually
the gauge) popped because of the heat, maybe
behind the headers was not such a good idea after
all.
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Bet you
did not know that Ford made several different size crank
pulleys for the 302. The larger pulley is from a truck
engine. Its part number E9TA-6312-BA and is 6 5/8" in
diameter. The small pulley is part number E4ZE-6312-AA
and is 6 1/8 in diameter. The larger pulley has
been sandblasted in preparation for painting. |
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28 Dec
08 Zinc Anodes |
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I took a
lesson from the boating world, this is something I
have been meaning to do for a while, but just now got
to it. I installed a sacrificial zinc anode in the
engine to help ward off any galvanic action
(corrosion) I got the pencil zincs from
USA
Zincs.com in Florida. These are 3/8 NPT in size
- #E1. It had to be trimmed a little before it would
fit properly in the manifold -- although the E1E size would probably not need
trimming. I installed one in the intake in place of a
stainless steel plug.
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