Watkins Glen gearing

[jimmyracer]

Anyone have some gearing info with Honda power that they care to share ?

Thanks,

Jim Goughary

[Mike Kolthoff]

With the risk of being hung! If I was in you boat I would look at what the Kent suggestions for VIR were and see how the ratios (numerical value) and see how they compared to your HPD gears you used for VIR ( You must have had them nailed) and then research the suggested Kent gears from various sources for Watkins. Reverse engineer if you will. Not perfect but should save you a session or two.

Good luck, wish I could be there.

[KevinFirlein]

Jimmy also you need to ask if the person making the suggestion is running as a 3 speed or a 4 speed. I prefer the 4 speed option but at the glen many people will run as a 3 speed ( no 1st gear on track).

I will look tomorrow at data for minimum speed and maximum speed and pm you with it

[jimmyracer]

Thanks all. I plan on running 4 usable gears and once I have the slow and top speed I should be able to get pretty close. Famous last words!

Jim Goughary

[jimmyracer]

This is what we came up with, not sure if it is ideal but we will find out soon enough I guess.

16/30
17/28
19/27
21/26

[BWC54]

This is what we came up with, not sure if it is ideal but we will find out soon enough I guess.

16/30
17/28
19/27
21/26

What do you use as a power band for the Honda? Does the ECU have a built in rev limiter?

[jimmyracer]

We are not sure yet what range is ideal but 5500-6500 is what we are trying for at the moment. The ecu has a rev limit of about 7000.

[SOseth]

We are not sure yet what range is ideal but 5500-6500 is what we are trying for at the moment. The ecu has a rev limit of about 7000.

If your getting 7000 then you are able to somehow get 200-300 more rpm out of your ecu. I can get about 6745 give or take as measured with my CDS system.

SteveO

[jimmyracer]

6995. we found out the hard way with the wrong gears testing at VIR.

[SOseth]

Then yours is quite different. I have run 4 different ecu's and they have all been around 6730 + or -

[stonebridge20]

6995. we found out the hard way with the wrong gears testing at VIR.

Jim, I think the GCR states 6800 rev limit for the Honda. You should probably look into that.

[BWC54]

Jim, I think the GCR states 6800 rev limit for the Honda. You should probably look into that.

That must have been an over rev due to a missed shift

[jimmyracer]

We shift at 6500 so it really does not matter much anyway but if it is a legality issue then I will definately look into it.

[CDS]

FYI the numbers Steve Oseth is reporting are dead on accuate (no sensor accuracy issues) since they are coming from the Honda CAN Bus.

[starkejt]

Question for Steve:

In your case, if you miss a shift close to the rev limit, have you found that the limiter still "catches" it at the same RPM as when you just accelerate into the limiter? I was curious if perhaps on a missed shift, it might freewheel to a slightly higher RPM in spite of the limiter cutting in before slowing back down.

[John Robinson II]

Jim,
What r&p are you running? 13-36?

[SOseth]

Question for Steve:

In your case, if you miss a shift close to the rev limit, have you found that the limiter still "catches" it at the same RPM as when you just accelerate into the limiter? I was curious if perhaps on a missed shift, it might freewheel to a slightly higher RPM in spite of the limiter cutting in before slowing back down.

Josh;

Certainly if you miss a shift or incorrectly match speed to gear on a downshift the engine will exceed 6800. Under normal acceleration the rev limiter will prevent the engine from exceeding the designed rev limit. In my case thats about 6740 + or -.

SteveO

[SOseth]

Jim,
What r&p are you running? 13-36?

John;

I think Doug Learned told me he is fitting all new Pipers with the 13-36 r&p.

SteveO

[jimmyracer]

Yes 13-36