Hypertech and 3.73 speed fix?

[StockV6Cam2]

I don't know about that one. Mine made perfect mathematical sense and quite frankly, yours didn't. Where the hell did 24 come from? I know it's a constant but what's it derived from. I used the 2 pi r equation to get the circumference of a tire and then multiplied it times the revolutions to get how long it would travel in a given minute. Then multiplied that by 60 to get how far you'd be getting in an hour and divided it by how many inches are in a mile. My math makes a ****load more sense but I may be understanding it wrong. Doubt it though.

[StockV6Cam2]

Ok now I see that you're using a ratio of

Current gearing ratioNew Ratio
--------------------- = ---------
Current tire sizeNew tire size

Which makes a little sense but it should work out to be the same in both cases.

[ October 01, 2002: Message edited by: StockV6Cam2 ]</p>

[Tiago]

<blockquote>quote:</font><hr>Originally posted by Silver3800V6FBodyKY:


3.42X = 24Y

X = Your tire height right now.
Y = What gear ratio you are going to be simulating.

[ October 01, 2002: Message edited by: Silver3800V6FBodyKY ]<hr></blockquote>


the correct formula should be

stock tire height times the stock ratio = the new tire height times the new gear ratio, solve for the variables.

[Silver3800V6FBodyKY]

<blockquote>quote:</font><hr>Originally posted by Tiago NOS'd Bird:



the correct formula should be

stock tire height times the stock ratio = the new tire height times the new gear ratio, solve for the variables.<hr></blockquote>

And that's exactly what I did, except I went ahead and replaced the new tire height with 24 since it's the lowest tire height avalible. My formula is right.

[V6Bob]

StockV6Camaro2 - Here's what's going on. Your equations show that a car with 3.23 gears and 12.5 inch (high) tires is equal to as a car with 3.73 gears and 13.23 inch tires. That makes perfect sense. Putting big tires on a car with 3.73s would make it the same as small tires on 3.23s.

The 12.5 goes with the 3.23, the 13.24 goes with the 3.73.

So, if you can only tell the computer that you have 3.23 gears you need to tell it you have smaller tires to get it to calculate your speed right. In your equations if you had 3.73 gears and 13.23 inch tires, and the computer thought you had 3.23 gears, you'd have to tell it you had 12.5 inch tires.

Silver3800V6FBodyKY is right.

[StockV6Cam2]

I was stating the radius, not diameter but your post is saying that both of us is right. Is my equation just backwards or something?

[redbird00]

well... i think you both said the same thing just different ways... so back to the original question does the new hpp work with 3.73's, from what you guys say... YES... right??

merlin

[Silver3800V6FBodyKY]

<blockquote>quote:</font><hr>Originally posted by StockV6Cam2:
I was stating the radius, not diameter but your post is saying that both of us is right. Is my equation just backwards or something?<hr></blockquote>

He was not saying both of us are right. He said that your formula is trying to say that if you increase the tire height that you will simulate lower gears (numerically higher), when infact that statement is incorrect.

There is an inverse relationship between tire height and gear ratio meaning that if you want to take off faster there are two different ways of doing it: Add numberically higher gears, or Add numerically lower tire height. That's how they are inversely porportional.

It doesn't matter if you were talking about radius or diameter, the concept was wrong. Besides radius and diameter are directly proportional so it wouldn't matter.

And yes, the new HPP3 will work for 3.73 gears, but so will the old one, you just have to trick the old one.

[V6Bob]

StockV6Cam2:

This is confusing stuff. I was saying your equation is right, but the way you interpret is backwards. You said:

"That means that you would need to set the tires size to 26.468 inches in order to trick the speedometer into being correct."

That's where you're backwards. It means that if you had 26.468 inch high tires and 3.73 gears, and the computer thought you had 3.23s, you'd have to set the tire size to 25.0 inches. The 26.478 goes with the 3,.73 and the 25.0 goes with the 3.23, just like you have it in your equation. If the computer thinks you have taller gears, you need to compensate by saying you have shorter tires. Your conclusion was backwards, even though your equation was correct.