Page 462 - 2021-22 Auto Performance_Circle Track
P. 462
Stage 1 Rochester 2bbl Carburetor
JET37001
Designed for circle
track classes requiring a
Rochester 2bbl. Stage 1
has a custom fuel curve for
maximum performance.
to use Holley-style jets,
incorporates a large .130"
dia. needle and seat assembly,
bowl capacity. Carb has a 1-3/8" venturi, 1-11/16" bore size, and is designed to pass a gauge test.
Circle Track Rochester Quadrajet 4bbl Carburetor JET35004
Built exclusively for circle track racing, Rochester Quadrajet carburetor is designed for 355-406 cu. in. small blocks with 11.5:1 compression,
250° @ .050" minimum camshaft duration with .525"+ valve lift,
and single-plane manifold and
headers. Unit has been thoroughly reworked by increasing main well
size, installing a large .149" needle
and seat assembly, and custom tailoring the fuel curve.
Made for small block Chevy 400
design and CNC-machined ring grooves
that accept 1/16", 1/16", and 3/16" rings. Pistons include valve reliefs to allow compatibility with oversized valves and long dura- tion camshafts. Sold in sets of eight and include oil rail supports,
.927" x 2.750" (130 gram) wrist pins, and double spiral locks.
Rod Comp. Dome
High-compression pistons are compat- ible with most stock, aftermarket, and angle-milled cylinder heads. Valve reliefs accommodate oversized valves and high-lift cams. Requires 1/16" top, 1/16" second, and 3/16" oil rings. Sold in sets of eight and include .927" x 2.750" (130 grams) wrist pins, and double spiral locks.
Part No.
Bore Stroke
Rod Comp. Length Ratio
Dome Volume
Part No. Bore Stroke Length Ratio
Note: Compression ratios are based on a 55cc combustion chamber.
Volume
JEP181957
4.125"
3.875"
6.000"
13.1:1
-6.0cc
JEP213112
4.155"
3.875"
6.000"
14.9:1
+2.5cc
JEP181960
4.155"
3.875"
6.000"
13.2:1
-6.0cc
JEP213123
4.165"
3.875"
6.000"
14.5:1
+2.5cc
350 Pistons
JEP182005
4.030"
3.750"
6.000"
13.3:1
+9.5cc
JEP182006
4.040"
3.750"
6.000"
13.7:1
+11cc
JEP182012
4.030"
3.500"
6.000"
13.1:1
+13cc
JEP182014
4.040"
3.500"
6.000"
13.2:1
+13cc
JEP182015
4.060"
3.500"
6.000"
13.5:1
+13.5cc
400 Pistons
JEP182024
4.125"
4.000"
6.000"
13.4:1
+3cc
JEP182027
4.155"
4.000"
6.000"
13.5:1
+3cc
JEP182028
4.165"
4.000"
6.000"
13.7:1
+3cc
JEP182032
4.165"
4.000"
6.000"
14.6:1
+8cc
JEP182033
4.125"
3.875"
6.000"
13.5:1
+5.6cc
JEP182036
4.155"
3.875"
6.000"
13.2:1
+3cc
JEP182037
4.165"
3.875"
6.000"
13.3:1
+3cc
JEP182038
4.125"
3.875"
6.000"
14.1:1
+8cc
JEP182039
4.130"
3.875"
6.000"
15.0:1
+10.8cc
JEP182041
4.155"
3.875"
6.000"
14.1:1
+8cc
JEP182042
4.165"
3.875"
6.000"
14.2:1
+8cc
JEP182053
4.125"
3.750"
6.000"
12.7:1
+3cc
JEP182058
4.125"
3.750"
6.000"
13.6:1
+8cc
JEP182061
4.155"
3.750"
6.000"
13.7:1
+8cc
JEP182063
4.125"
3.625"
6.000"
14.1:1
+12.9cc
JEP182065
4.155"
3.625"
6.000"
14.3:1
+12.9cc
JEP182067
4.125"
3.500"
6.000"
13.8:1
+13cc
JEP182069
4.155"
3.500"
6.000"
13.8:1
+13cc
JEP207513
4.185"
4.000"
6.000"
14.8:1
+8cc
for improved compatibility with a wide
variety of 18° cylinder heads. Engi-
neered for large cubic inch, high-com-
pression Dirt Late Models, pistons
accept 1/16", 1/16", and 3/16" rings, and
feature valve reliefs that are compatible with over-
sized valves and long-duration camshafts. Sold in sets of eight that include oil rail supports, .927" x 2.750" (130 gram) wrist pins, and double spiral locks.
Rod Comp. Dome
Part No. Bore Stroke Length Ratio
Note: Compression ratios are based on a 55cc combustion chamber.
Volume
JEP213110
4.135"
3.875"
6.000"
14.7:1
+2.5cc
JEP213121
4.145"
3.750"
6.000"
14.4:1
+2.5cc
JEP213112
4.155"
3.875"
6.000"
14.9:1
+2.5cc
JEP213123
4.165"
3.875"
6.000"
14.9:1
+2.5cc
Notes: Compression ratios are based on a 64cc combustion chamber. All of the 350 pistons fit both 3.480" and 3.500" strokes.
460 TRACK
CIRCLE 2021-22
