which class would it fit in?

[AndrewPierce]

92 civic w/b16a2 ctr pistons, cams. ported head bored 20over. the list goes on

 

thanks

[H4CRXSi]

The CTR pistons and ported head puts you into the H1 class.

[slammed_93_hatch]

you might not be legal for h1 with that motor. You need to elaborate on the "the list goes on"

[Zook]

also depends on how much the head's been ported. If I remember right, even h1 only allows portmatching to an inch into the port.

[AustinG]

also depends on how much the head's been ported. If I remember right, even h1 only allows portmatching to an inch into the port.

 

The head is wide open in H1, intake manifolds and throttle bodies are not.

 

9.3 H1 Hybrid Vehicles Only

In addition to any unmodified part from any Honda or Acura model, market, or generation, the following components are unrestricted:

 

...snip...

Engine cylinder head porting (“from the block up”)

...snip...

[ekim952522000]

Here ya go

 

9.3.1 H1 Hybrid Vehicle Engine Preparation

a) This section is intended to clarify the engine preparation rules specific to Hybrid Vehicles.

b) The engine, from the top (deck surface) of the engine block “down” to the ground, MUST be constructed

entirely of Honda/Acura OEM parts. No aftermarket parts are permitted in the “bottom end,” of a Hybrid

Vehicle engine except otherwise permitted in these rules. Although engine overboring is not subject to the

.040 allowance permitted in section 7.1© pistons are required to comply with 7.1.c of this rulebook. Pistons

must be available as an OEM Honda part. Piston tops may be “notched” or “cut” for valve clearance only.

c) “Above the engine block” cylinder head preparation and porting is unrestricted unless otherwise stated in

9.3.1(h). Valve size and material must conform to original specification for that particular head. Rocker shaft

assemblies are also unrestricted.

f) Intake Manifolds are not considered part of the cylinder head and must be unmodified OEM Honda parts.

Port matching is allowed but cannot be machined beyond one (1) inch into the intake manifold.

g) Items that attach to the cylinder head may be re-drilled for fitment purposes ONLY. Alteration of air and

fuel passages is not permitted. Fitment modifications that alter air and fuel, as a side effect will be deemed

illegal.

h) K Series cylinder head must use unmodified OEM camshafts and rocker assembly that is sold with K

series cylinder head. JDM is considered OEM and permitted. Cylinder head preparation must conform to

rules in 10.3.(A-H).

i) A block guard that ties the top edge of the cylinder bores together is permitted for use in the B20 block and

D series block only. The unit may be welded in place. This allowance is specifically designed to allow a plate

to be installed at the top of the bores and may not extend more than one inch below the top of the engine

block. This allowance does not permit the block to be “sleeved” which is the process of replacing the cylinder

bores with a stronger design.

j) Any throttle body may be used providing it has an outlet size of 62mm or less. Over-boring of stock throttle

body is permitted up to 62mm.

k) K series engine blocks must utilize the Honda specified crank, rods, and pistons. I.E. K20 block must use

K20 pistons, rods, and crank.

l) K24 engine compression is limited to 11.0:1, K20 engine compression is limited to 12.0:1, and

H22/H23/F20A/F22A/F22B engine compression is limited to 11.5:1.