Billy Elliot

I'm considering doing an open track day at Mid-Ohio next month and I'm curious as what top speeds people are getting.

I'm running a close ratio gearkit so my top speed is just over 100mph in 5th gear, and I would sure hate to run out of gear on the straight for long periods of time. I've got a bone stock B16A motor, car weighs about 2200ish when I take off all my rally spares/co-driver seat, skid plates.

ZUL8R

your gonna need more gear for the back straight...

GI8U2racing

I've got your perfect answer. Just came from there 2 weeks ago, running a B16A2 making 165 whp (with ITR cams and IM), 2250 lb Integra Type R, hit 125 mph on the back straight. So you're not going to be where I am with power, so figure 115 mph

Stinkycheezmonky

Just over 100mph limited, you're going to run out of gear on most tracks, period.

Billy Elliot

It's odd, on paper, I'm supposed to be at 113mph. But when I was GPS logging at Rally TN and bumped off the limiter in 5th I only had 101mph listed. Could have been tree cover but I don't think it would have my speed off by 12mph. I need to do an open cover GPS log in 1-3 to double check the numbers. If I'm at 113 like I calculate, I should be ok, just barely.

But if I'm not, not until I bump the limiter from 8300 up to 9k+ after I work on the motor I'll have some extra MPH. And even at that, I'll be making more power so I'll most likely still hit the limiter.

I got parts for a frakenbox with GSR 1-2 and my old B16 3-5 gears that I was going to use as a spare and Honda Challenge trans, but I need a diff and 4.9 final to finish it up.

Thanks guys for your responses. Quite possibly could have saved me a couple hundred bucks if I was finding out I lacked gears the day of.

Lo-Buck EF

yea, i have tried the short (115mph) trans at a track with less straight away. it doesn't work.

VTECIntegra9

I'll vouch also. My teg hit 100 in the very wet on horrible tires, and I was holding that speed at the kink and just waiting for the braking zone.... because the car was dancing.

So in the dry no dice. Find a friend with a trans for a weekend?

P.S. which track day? 3balls on the 19th? I plan on going to this but just realized I might also be at the grand-am race that weekend.. hmm what to drive

Billy Elliot

Yeah, was the 3balls event. I really don't want to swap the trans for this, I've got a rally in October and don't feel like putting the trans back on.

Maybe next summer though. I plan to have a pretty good summer gap so I can get away with a trans swap between February and August. There is an event in June, but it's a high speed event and I co-drove and we hit well over 100 in a 1st gen Neon, so having my track day trans might not be so bad.

JOE BD-0

Any car should never reach the "on paper" top speed. There are other factors that most guys usually do not consider such as the resistance of the rubber tire to the pavement, etc.....On another note, your frankenbox is only legal for H1, correct? Good Luck...

Billy Elliot

my "on paper" top speed is not drag or rolling resistance related. Taking the rolling circumference, adjust by engine speed, gear ratio, final drive. The car will not go any faster when you're bumping off the limiter in 5th. Your tires rolling resistance will not be a factor in that.

Now that I'm reading the rules, it's a bit fuzzy.

Rules state that for every class:
Maybe I need to send them an email to clarify. I thought I remember reading somewhere that was the trans to have for HC cars. If not, then I can just need to get a B16 mainshaft.

Calif_Kid

I'm not sure if this helps, but a very similar question regarding the gearbox/gearing (for H2) was raised in the HC Honda Challenge Nasa forum at the link below. - Jim

http://www.nasaforums.com/viewtopic.php?f=11&t=45529

Billy Elliot

That was the other rule in H2, typo and all.

So by swapping the gears you are allowed to be legal in H2 as long as you're pulling from the same series transmission. So GS-R 2nd in a B16 box is legal.

My original quoted rule is the generic umbrella rule, which doesn't include "series" in the defintion. So, for anything in H3+ you can only change the final drive.

H1, there is an umbrella rule that I overlooked as well:

So swapping gears in your trans would be using unmodified parts from Honda/Acura.


But I would have been fine anyway, since my car is classified in H1 anyway since I am running a dual master cylinder setup with a floor mounted pedal box assembly. This is allowed in H1 since the brake system is free (but need ferrous metal rotors). Although, I would probably get stomped running a bone stock B16 engine too.

Stinkycheezmonky

You're just talking about running a track day though, right? Not competing in Honda Challenge. Consequently, those rules don't matter at all.

Billy Elliot

I know Honda Challenge rules don't apply to a track day.

The trans that I would build, that I would use on a track day, I would like it to be Honda Challenge legal so at some point I can run HC races. The only thing that is not HC legal on my rally car is the trans.

So in a way, yes, Honda Challenge rules will matter on my "track day" trans.

Stinkycheezmonky

Ah, I just didn't see any mention of that. A lot of people get caught up in that stuff when they won't ever see competition, hence my post.