Reorganize Tables 1 and 2
#31985 from Formula/Sports Racing Committee · Rule change · TB 22-02 (2022-02 Fastrack)
In FA, GCR section 9.1.1.A.2.b, make changes as follows:
"The following modifications are permitted unless restricted in the sections or tables below that follow."
In FA, GCR section 9.1.1.A.2, add a new section as follows:
"c. 2.0 liter Honda K20Z3
1. Block must be OEM Honda Civic K20Z3 2.0 liter PN 11000-RRB-810, maximum bore 86.070mm (3.3886").
2. Crankshaft must be OEM Honda Civic PN 13310-PRB-A00, maximum stroke 86.1mm (3.390"), unmodified main and rod
journals, minimum weight 37.5 lbs.
3. Connecting rods must be OEM Honda Civic PN 13320-PRBA01, maximum center-to-center rod length 138.95mm (5.470"),
Show 46 more lines
minimum weight with fasteners 580g.
4. Maximum compression ratio 12.7:1 +/- 0.2.
5. Pistons, rings, pins, and circlips must be HPD-supplied kit PN 13100-FC4Y-A000, piston minimum weight 325g, wrist pin
minimum weight 101g.
6. Head must be OEM Honda Civic K20Z3 2.0 liter PN 12100-RBC-000, ports must be as cast beginning 1.00" into ports.
7. Valves must be OEM Honda Civic K20Z3 2.0 liter PN 14711-PRB-A01 with minimum stem diameter 5.445mm and maximum
head diameter 35.15mm (intake), PN 14721-PRB-A00 with minimum stem diameter 5.420mm and maximum head diameter
30.15mm (exhaust).
8. Valve springs must be HPD-supplied kit PN 14700-FC4YA000.
9. Camshafts must be OEM Honda PN 14100-FC4Y-A000 (intake and exhaust set). Maximum intake valve lift measured at
retainer PRI (front) 8.50mm, MID 13.50mm, SEC (rear) 9.50mm, maximum exhaust valve lift measured at retainer PRI (front)
8.00mm, MID 12.20mm, SEC (rear) 8.00mm. Maximum intake valve duration above 1mm measured at retainer PRI (front) 202
degrees, MID 262 degrees, SEC (rear) 210 degrees, maximum exhaust valve duration above 1mm measured at retainer PRI (front)
202 degrees, MID 250 degrees, SEC (rear) 202 degrees.
10. Intake manifold and throttle body assembly may be either the original, unmodified HPD parts or unmodified AT Power
Direct-To-Head (DTH) 45mm individual throttle bodies, PN 102-104-00020.
11. Exhaust header must be used as delivered from HPD. Collector must be 4-into-1 design.
The CRB reserves the right to implement a requirement that engines be submitted for dyno testing and sealing at any time. If
implemented, engine performance will be compared to known specimens. Engines will be denied a seal if they test above 102% of
the standard power and torque curve and will be ineligible for competition until power is corrected and the engine is sealed. The
participant will be responsible for all costs of dyno testing and delivery. This provision is included to dissuade the competitors
from exploiting the rules and expending funds to maximize performance of a budget-minded engine option."
In FA, GCR section 9.1.1.A.2, add a new section as follows:
"d. 2.0 liter Mazda MZR
1. Block must be OEM Mazda MZR 2.0 liter casting #LF95, maximum bore 3.455".
2. Crankshaft must be forged OEM Mazda 2 liter marked "fomoco" DBE8Z31E, maximum stroke 3.270", minimum rod journal
diameter 1.830", minimum main journal diameter 2.026", minimum weight 31.5 lbs.
3. Connecting rods must be magnetic steel; maximum rod length 5.760", minimum weight with fasteners 530g.
4. Maximum compression ratio 13.1:1.
5. Piston minimum weight 280g. Wrist pin minimum diameter .825", minimum weight 83g.
6. Head must be OEM Mazda 2.0 liter MZR, part #LF9G-10-090A, casting #6M8G, with minimum chamber volume 40.5cc; ports
must be as cast beginning 1.2" from valve seat insert.
7. Valves must be steel; minimum stem diameter 5.45mm, maximum head diameter 1.402" (intake) and 1.21" (exhaust).
8. Camshafts must be Kent DTEC 80 or Mazda Speed PN 1410001I (intake) and PN 141001E (exhaust), maximum lift .478"
(intake) and .446" (exhaust), maximum duration 260 degrees at 1mm lift (intake) and 256 degrees at 1mm lift (exhaust).
9. Intake manifold must be unmodified Elan DP02-60-003 or Mazda Speed equivalent Elite USF2015AT, 1.882" maximum bore
diameter at throttle plates.
10. Aluminum spacer must be used between intake manifold and cylinder head castings; minimum spacer length 2.200".
11. Exhaust header may be Pro Fab PN P97819 or Pro Fab PN 100002-01 and must use Pro Fab PN H0503 flange. Collector must
be 4-into-1 design. Maximum primary pipe OD 1.75", maximum tail pipe OD 2.5".
The CRB reserves the right to implement a requirement that engines be submitted for dyno testing and sealing at any time. If
implemented, engine performance will be compared to known specimens. Engines will be denied a seal if they test above 102% of
the standard power and torque curve and will be ineligible for competition until power is corrected and the engine is sealed. The
participant will be responsible for all costs of dyno testing and delivery. This provision is included to dissuade the competitors
from exploiting the rules and expending funds to maximize performance of a budget-minded engine option."
In FA Table 1, make changes as follows:
A specification table follows in the original; it is not shown here.