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What is a legal tranny in H1? Can it be JDM or does it have to be USDM

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Old Jun 23, 2004 | 02:12 PM
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Default What is a legal tranny in H1? Can it be JDM or does it have to be USDM

I did four different searches and I have not found the answer to my question. The HC rules are a little fuzzy the way it is phrased (16.2). I have a YS1 cable tranny with a B18c 88 CRX Si. For H1 what is legal? I want to change to a hydro tranny in that I have been advised there is a GSR (JDM I think) and a USDM ITR tranny that I could bolt up with a conversion kit. If the GSR is a JDM is that legal for H1? I have been told those trannies are stouter and the synchros are better and if I have to plug one in I want stouter and still build toward H1 legal for when I make the leap from DEs to road racing. Any enlightenment appreciated.
Barry H.
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Old Jun 23, 2004 | 05:07 PM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

i know there are guys running JDM trannies. in h1
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Old Jun 23, 2004 | 08:16 PM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (slammed_93_hatch)

LOL. That may be true but then again is a JDM tranny legal in H1? The use of the word "different" and later in the same phrase "domestic" kind of confuses me. Maybe I lost my grade school ability to diagram a sentence.
Barry H.
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Old Jun 23, 2004 | 11:11 PM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

i KNOW that people WHO ARE competive in H1 run JDM tranny's and openly say they do.
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Old Jun 24, 2004 | 12:24 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

I thought anything Honda is legal in H1? (except cams, and other stuff noted in the rules is free)
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Old Jun 24, 2004 | 02:47 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (davidnyc)

Rule 16.2 "Hybrids defined" A "hybrid" is defined as any Honda vehicle built with components that are sourced from a Honda vehicle of a different model, domestic market, or generation. Additionally the following are free:
1. brakes
2. Engine cylinder head
3.Engine Management
4. Compression

I see the word "different and it should describe each noun in the following phrase so I am thinking it means "different domestic market" as one of it rules statements. Doesn't it? The word "domestic" is a little confusing to me because a different domestic market could be not only Japan but also a European spec in that it too is also a different domestic market.

Now under rule 16.2 Hybrid Engine Preparation one phrase is included that the engine "must be constructed entirely of Honda Parts (JDM is considered OEM Honda)". Now does that phrase in the engine preparation section clarify what is a Honda part for other items not in that section? If so why wasn't that put up in 16.2 where the word "hybrid" is defined. Then it would be clear. Why use the word "domestic" in section 16.2?

Rule 9.5 not a section under the hybrid rules is the only specific mention of transmission but really only discusses the use of flywheels, clutches, LSDs, Final Drives, shift linkages, and shift levers.

I would love for JDM trannies to be legal because I am looking at one. But before I plop down the cash for one I for darn sure want to make sure what the rule is. Anybody have a definitive answer? Thanks.

Barry H.
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Old Jun 24, 2004 | 03:40 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apexinghonda &raquo;</TD></TR><TR><TD CLASS="quote">
I see the word "different and it should describe each noun in the following phrase so I am thinking it means "different domestic market" as one of it rules statements. Doesn't it? </TD></TR></TABLE>

Correct. You got it right.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apexinghonda &raquo;</TD></TR><TR><TD CLASS="quote">
The word "domestic" is a little confusing to me because a different domestic market could be not only Japan but also a European spec in that it too is also a different domestic market. </TD></TR></TABLE>

Correct, and hence legal for an H1 hybrid.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apexinghonda &raquo;</TD></TR><TR><TD CLASS="quote">
I would love for JDM trannies to be legal because I am looking at one. But before I plop down the cash for one I for darn sure want to make sure what the rule is. Anybody have a definitive answer? Thanks.
</TD></TR></TABLE>

They are legal for an H1 hybrid, it's definite. Rule 16.2a says so.
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Old Jun 24, 2004 | 06:56 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (El Pollo Diablo)

Yes, it is legal.

H1 is kind of nice because you get to do things to your car that you can't do in other classes in order to be competitive with the NSX's and S2K's... of course the only draw back is you have to be competitive with NSX's & S2K's

Don't let the word domestic confuse you... JDM, USDM, etc. is all domestic to it's place of origin (i.e. the 'DM' in JDM & USDM is 'Domestic Market') hence the wording of 'different domestic market'.

Also, cams and adjustable gears ARE free
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Old Jun 24, 2004 | 09:35 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apexinghonda &raquo;</TD></TR><TR><TD CLASS="quote">Anybody have a definitive answer? Thanks.

Barry H. </TD></TR></TABLE>


To get the definitive answer, contact the rulesmakers directly.

The original intent was to make them legal.
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Old Jun 24, 2004 | 10:31 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (JeffS)

thanks for the input guys.

barry h
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Old Jun 24, 2004 | 11:19 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

Also, an automatic with a shift control module by revs is allowed as well.
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Old Jun 24, 2004 | 02:40 PM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

Our #66 H1 car is a JDM Right Hand drive car... Everything in it is JDM Including the Gearbox. Has been legal since we started running in Honda Challenge in 2003.
Kiwi
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Old Jun 24, 2004 | 08:49 PM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

if you cant do the cable to hydraulic swap i belive you can still take the guts and transfer it to the YS1 case. what they dont see wont hurt right?
-Roger
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Old Jun 25, 2004 | 04:28 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (E-Town4229)

You can do the swap. As others have said section 16.2 subsection 'a' clearly states this. In addition section 16.3 subsection 'h' gives even more evidence of this by stating that "mounts and associated components required to perform a swap are free" (I imagine this would include the cable to hydro conversion kits as well). Sometimes the 'letter of the law' if you will, is a little unclear but I think with H1 the 'spirit of the law' clearly conveys that pretty much any oem honda part is legal if you take into consideration all verbiage under the hybrid rules section.

And if it weren't legal that would be pretty under handed and unsportsman like to go swapping guts with the mindset that "they'll never know".


Modified by h22avid at 8:41 AM 6/25/2004


Modified by h22avid at 8:46 AM 6/25/2004
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Old Jun 25, 2004 | 11:23 PM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (KIWI)

.....but could you use the better ratios of the usdm itr tranny and swap in the jdm (4.785) final drive?
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Old Jun 26, 2004 | 06:34 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (Black R)

In H1 final drives are "free" so you can have one custom made if you want.
Barry H.
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Old Jun 27, 2004 | 06:53 AM
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Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apexinghonda &raquo;</TD></TR><TR><TD CLASS="quote">In H1 final drives are "free" so you can have one custom made if you want.
Barry H. </TD></TR></TABLE>

The final drive ratio is free in all classes, not just H1.
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Old Jun 27, 2004 | 12:14 PM
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From: Atlantis
Default Re: What is a legal tranny in H1? Can it be JDM or does it have to be USDM (apexinghonda)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by apexinghonda &raquo;</TD></TR><TR><TD CLASS="quote">In H1 final drives are "free" so you can have one custom made if you want.
Barry H. </TD></TR></TABLE>

.....what about gear ratios? a 3,4,5 set would be soooo nice.....
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