92 S with h22a, what do i need to do - Honda Prelude Forum

[SUB[EX] · 09-29-2004, 01:27 PM

I finally started reading the rules for Honda Challenge.
I plan on building this 92 S to eventually hit the track.
After reading the forums i read that it is possible to run a h22, (maby h22a, no sure) if i converted my car to everything else from the vtec model.

Is this true? What else would i need to do?
Would i need to convert the brakes?
Possibly i would need more weight but im sure i could work that out.

The rules say that basically everything else that distinguished the S from the Vtec can be changed out so i dont think thats the issue. What are your toughts.

Also i dont want to run in h3 and i think h1 is pushing it.

Paul H22 · 09-29-2004, 04:10 PM

In H2, you should be able to get away with running a h22a1 since it came in 4th gens. Sure, it didn't come in the 92 versions but that can be over looked. NASA is not quite as strict.

You would want to convert over to vtec brakes and calipers, since, thats what the vtec model you are converting to came with. I'm sure theres a few other things you need to do to covert over to a vtec model, but I don't really know them.

After removing so much weight, you may have to add ballist and run with a full tank of gas to meet the weight requirement. It just depends on how much you remove.

alvanderp · 09-29-2004, 07:39 PM

I would talk to your Regional NASA director and get their input. Different regions have different interpretation of the rules. I would think you would have to conform to the weight of the VTEC as listed in the rules. I dont think the rotors and calipers would necessarily have to be changed, but I think it would be in your interest to do so, since they are larger

If you read the rules by the letter, only 93 and above Preludes are allowed in H2, and by the letter of the law, your car is a hybrid, which would make it have to go to H1, although I doubt a regional chief would worry about it much as long as you conform to all the H2 rules for the 93-96 VTEC, and all stock parts match the 4g VTEC. FYI the rules can be found here:

http://www.nasaproracing.com/rules-forms/2004_hc.pdf

[SUB[EX] · 09-30-2004, 09:47 PM

yea i read through all the rules.
I found a few posts in the forum about being able to convert the car so its the same as the model your changing to. Well, im building the car with h22a bottom end for now, so i guess i would be h1 anyway.

The rules say you have to have an untouched wiring harness, im kinda skrewed there since the vtec has more wires and i have to add them. pita.

I may just be skrewed here. But ill deal with that when the time comes.

marcucci · 10-01-2004, 08:42 PM

They shouldn't mind the wiring harness since you didn't add anything that didn't come on that model. Worst case you can make it undetectable with just a little more work.

I would definitely upgrade to the VTEC brake hardware since you are now carrying more weight and the S brakes quite plainly just suck. Pads would help a lot but if you want to be safe and competitive you need to get the VTEC hardware.

[SUB[EX] · 10-01-2004, 10:12 PM

Yea after reading the rules again, looks like the rotors have to be Factory Size. SO a brake swap is definately needed.

Yea im sure i can clean the harness so it looks totally stock after my modifications. But its still not stock. How closely do they inspect the harness?

I really wanted to go work on the car tonight but i had to watch my 2 yr old. So no go

Ohh almost forgot, what about rods? Looks like we can use aftermarket parts as long as they are the same spec as factory. But you would need that anyway to get proper compression. So are eagle rods permitted?

alphajesse · 10-01-2004, 11:30 PM

If you read the rules, the bottom end has to be all-oem, even in H1.
Eagle rods are far better than stock, so no, those are not OK.
Look in the NASA forums, that is the best place to ask rules questions.

marcucci · 10-02-2004, 06:47 AM

If you don't overrev the stock ones will be fine. DR has not had any trouble and he's been tracking the car for the last 4 years or so (around 20k track miles).

On the harness, get a factory one to swap in where you can (an engine harness swap is not too hard) and splice in factory wiring or factory-looking wiring into the connectors. Using OEM connectors and wires in the OEM holes in the connectors, then wrapping in electrical tape no one will ever question it. It's easy to make the stuff look stock by just making it look stock (loom and tape).

71dsp · 10-02-2004, 07:35 AM

I think you could petition to go under the classification as a 93 VTEC. That's essentially what you're doing, and I don't think it would be a problem as long as your car is legal for H2. H1 obviously wouldn't be a problem, other than cost.

AFAIK, rods must be stock. Aftermarket pistons are allowed as long as they are constructed to the stock specifications and weigh as much as the stock pistons. I don't think there's a need to have a set of custom pistons made to push the rule evelope, and the stock rods should hold up fine as long as you're not reving to 9k or something crazy.

Remember, if the modification is not allowed in the rule book, it's not allowed at all. Only the modifications spelled out in the rule book are allowed. Now some rules are open to interpretation, but thinks like aftermarket cranks are not allowed since that's not specifically addressed in the rule book.

Another thing to keep in mind is that HC allows removal of the heater core, SCCA IT rules do NOT. So if you plan to race the car in both series, you need to keep the heater core.

[SUB[EX] · 10-03-2004, 11:34 PM

Well, i think ill just run in HC and open track days. Well i definately want to hit some open track days first, to see if i even have enough skill to compete in h2.