End gap is the measurement between the ends of the ring when they are placed
into the cylinder bore. The ring must be perfectly square to achieve a correct mea-
surement. Note that the difference in end gap amounts is dependent on the type
of engine you are building.Using a flat blade feeler gauge, we mea-
sured the end gap of our piston ring.
Every ring should be test-fit for proper
end gap.This “pip” on the piston ring denotes
which way the ring should be installed.
In almost all cases the pip should face
up.This oil rail support ring is in addition
to the standard rings, as it creates a
“floor” within the oil ring land. This is
necessary with this style of engine
since the oil ring goes through the
wristpin bore.If the end gap is too little, you can grind
the end of the ring with a ring grinder.
Be careful not to take too much off,
or you could find yourself buying new
replacement rings. After all, you can’t
put ring material back on a ring, and
excessive ring gap will reduce engine
efficiency.20192221 23SHORT-BLOCK BUILD22 OCTOBER 2019 WWW.MUSTANG-360.COM
FACTORY 302 CI V- 8
FORD MUSTANG ENGINE BLOCK
ARP BOLTS, PN 154-500
Main studs
ATI RACING PRODUCTS, PN 918921
SFI 18.1
6.325 in.
JE PISTONS
PN 170848
Bore: 4.030 in.
Oversize: 0.030 in.
Dome volume: -22.00 in.
Weight: 415 grams
Piston rings, PN J10008-4030-5
Top ring, PN S14030-5-116DMB
Second ring, PN P24030-5-116IPT
Oil ring, PN H34030-0316FCUF
Piston pin, PN 927-2750-15-51S
K1 TECHNOLOGIES CONNECTING RODS,
PN 011AI25540
K 1 SBF 5.400 in. center to center
Forged 4340 steel, H-beam design
Shot-peened, bronze wrist pin bushings
Housing bore: 2.225
Bearing width: 8.310 in.
Bearing saddle width: 0.740 in.
K1 TECHNOLOGIES CRANKSHAFT,
PN 011DAI340
Forged and 4340 steel construction
Nitride hardened for improved strength
and bearing life
Straight hole oiling for improved
lubrication
L 1 SBF 3.400-in. stoke, forged
Main journal diam.: 302 Ford
Total weight: 47 lb.
COMP CAMS
Camshaft: Comp Cams hydraulic-roller,
PN 35-328-8
Gross valve lift: 0.54 4-in. lift intake,
exhaust
Duration at 0.050-in. lift: 224° intake,
230° exhaust
Intake centerline: 108.0°
Lobe separation: 112.0°
Comp Cams hydraulic roller lifters,
PN 851-16
Comp Cams double roller timing chain,
PN 2138
Comp Cams lifter retaining system,
PN 8135-LR
CLEVITE ROD BEARING, PN 22387
CLEVITE MAIN BEARINGS, PN MB 529SIthe engine build contains parts from
Automotive Racing Products, ATI
Performance Products, JE Pistons, K1
Technologies, Clevite Bearings, and
Comp Cams.chain setup. The green epoxy paint
applied to the galley was a signature
touch of our engine builder, Tim
Roberts, who is the engine specialist at
Gear Driven Automotive.
Follow along as we walk you
through the basics of building up this
347ci engine for Gutierrez. In the end
we will dyno the engine to determine
just where we came in with regards to
performance and power—because all of
this engine stuff just can’t be measured
by looking at it on an engine stand. And
we wouldn’t do that to you!The camshaft was the recommen-
dation of the man on the Comp Cams
tech line, who spec’d out our camshaft,
including all of the accessories, such as
the hydraulic roller lifters and timing