If I am running in the H1 class can I:

1. port my head
2. use after market cams
3. use an after market intake manifold
4. use a z10 cross member

The first 3 are so I decide if I am trading my gsr head for a type r head.

 

1) Head intake and exhaust parts may be matched but cannot be machined beyond 1 inch into the head. Valves and valve seats may be machined (this does not allow valves made of alternate material as OEM).
2) No internal engine aftermarket parts are allowed.
3) Any air intake in front of the throttle body may be used (stock throttle body must be retained). The rules do mention allowing exhaust headers, but do not mention aftermarket intake manifolds. I'd assume the usual rule of thumb falls into place, and if it's not mentioned in the rules, it's not allowed.
4) Unmentioned, therefore I assume illegal.

http://www.honda-challenge.com/forms/rules.pdf

I believe these are all correct, but maybe someone else can verify for me!


[Modified by drumsy, 6:14 PM 7/6/2002]

 

If you look at the Hybrid rules though it says:

3.8.3 Hybrid Engine Preparation
This section is intended to clarify the engine and drivetrain preparation rules specific to
hybrids.
- The engine, from the top of the engine block “down” to the ground, MUST be
constructed entirely of Honda parts. No aftermarket parts are permitted in this, the
“bottom end,” of a hybrid engine. Engine overboring is subject to the restrictions
listed in section 3.1 of this Rulebook
- “Upward” of the engine block, cylinder head preparation is FREE
o This is limited to the cylinder head itself – items that attach to the cylinder
head (throttle bodies, fuel injectors and rails, etc) are required to be
sourced from Honda parts
- Engine and transmission mounts, and associated components (shift linkages, etc)
required to perform an engine/drivetrain swap, are free
- Engine management systems (ECUs, piggyback computers, etc) are free

 

I would then assume the rules I stated would be for H5-H2. As far as the intake manifold, I would think any OEM part would do for H1 only, but still, no aftermarket.

 

Does anyone know if this:

“Upward” of the engine block, cylinder head preparation is FREE. This is limited to the cylinder head itself – items that attach to the cylinder
head (throttle bodies, fuel injectors and rails, etc) are required to be
sourced from Honda parts

means you can port the head fully and run aftermarket cams.

 

Karl Shultz karl@honda-challenge.com is the current last-word, but most of this is spelled out pretty-well in the rule book.

Port: Yes
Cams: Yes
Intake manifold: No (honda parts only)
z10: ??? - my guess is it's not allowed... just a guess though

 

From the authority...

1. Z-10 whatever arms are not allowed.
2. Non-honda intake manifolds are not allowed.
3. Port work, valve work...whatever you can do to the head within the rules...is allowed

Here is the intention of the rules. Take a cylinder head as you would take it to the machine shop for a rework. No injectors, no nothing...just the head. That head you have in your hands is open...everything else is subject to the ECHC rules and/or the hybrid rules.

As always, email karl@honda-challenge.com for more specifics.

--Karl, who knows the rules are not perfect, but asks you to bear with us since this is our first year...

 

Before you go porting the head, you better read the rules about porting. It's pretty restrictive. No further than 1" into the head, unless you're in H1.

Warren

 

Well that is what I am trying to clarify here.

I have a b18c1 with a fully ported head, stock valves, but a 5 angle valve job. It has crower springs and retainers. It also has a skunk2 intake manifold and a bored stock gsr throttlebody. That is what I have right now. It sounds to me that the only thing I would have to change there is the intake manifold. I could fabricate a type r intake manifold to work.

My other option is to use a stock 98 JDM type r head, toda b's and ctr .25 over pistons and type r rods. I would lose the ported head if I did this though.

 

Your head is ok for H1, per the rule that allows free headwork.

Your intake and TB are not legal. The rule specifies head only. So, better get yourself the largest Honda manifold and TB that fits (ITR?). The manifold is subject to the normal HC rules (port matching 1" deep only).

[addendum] I'm not sure "fabricating" a Type-R manifold would be legal. You would have to argue that the work was required to complete the hybridization. Better check with Shultz to be sure - and be specific about what "fabrication" would be required (redrilling, welding, cutting, etc).


[Modified by Crack Monkey, 6:01 PM 7/6/2002]

 

Please do.

--Karl

 

Well Karl,

Would redrilling holes in a type r manifold, or using a gsr manifold flange on a type r manifold be legal? I am just trying to feel out which setup would be better for me. Also using a JDM 4-1 header in a crx requires cutting of the front crossmember so it would be safer to use the Z10 crossmember!! Again I am far from track worthy in terms of my skills, but I would like to compete by next season.

Josh

 

in my completely un-authoritative viewpoint i would say yes....

However, by putting on a ITR head, are you really going to gain anything over the ported/polished head you have? Something to think on...

 

I don't think I will gain anything at all with the type r head, it was mostly legality issues I was worried about. My current setup made 176 hp with full cat, resonator, and muffler. If I bump the compression with jdm itr pistons I could have a hell of a setup, but the gsr intake manifold would restrict me a bit. Either way I need to get some track time first before I start worrying about total horsepower.

Josh

 

I'd say dont worry about the head, and work on suspension first. Uncork the exhaust and if you see 185 whp i'd say you're in damn good shape

 

Well that exhaust was on the 96 coupe. The swap is now in an 88 hf. I need to get an exhaust made for it. It has tokico illumina's and ground control drag coilovers (450f 900r). So the spring rates need to change. Other than that it still needs sway bars. I have 15x7 k1's on my coupe that will end up on the crx. Oh yeah it still has stock brakes, so those of course will be upgraded.

 

A redrill is fine under the "Modifications needed to facilitate a swap" clause. Chopping off flanges and rewelding stuff is not, and sounds like a giant pain in the *** anyway.

This stuff is all spelled out pretty clearly in the rules particularly section 3.8 for hybrid cars. Those things that are not clear can be forwarded to me at the email address above.

 

Thanks Karl, I will mail you if I am unsure of any further modifications.

Josh

 

Track time will be available at CMP August 3 and 4 - and you can meet all the ECHC folk and get your answers -- in person!

 

And not to be picky or anything, but how about ditching the avatar there Sparky???

I'm finding it hard to be nice and answer questions with you (I'm assuming it's you) shooting a friggin' bird at me.

 

burnouts to YO mother!!!

 

Here, now my avatar is a different kind of bird.

 

yes, this is really more appropriate. Please lose the avitar, and put something more appropriate in its place. Or, we'll just do it for you - your choice.

Thanks, have a bandit day.

RJ

 

There you go changed once again. Sorry if i offended anyone.

 

Thanks

I think this thread is dead as well. Thanks for playing

RJ