Power Figures Dyno Chart

[Lithius]

Ah okay, here's my numbers if someone could add them in. They start at 60km/hr and go through to 183km/hr. Also I really like the idea of PHP/SQL page, would be awesome to be able to compare so many different cars/modifications at the click of a button.

55 63 73 85 87 90 95 98 103 106 110 114 120 127 129 138 147 151 163 167 173 180 190 197 198 199 201 201 202 202 202 203 204 204 204 203 197 195 193 192 190 181

[Bass Junky]

I reckon just speed or rpm.

Nothing else. We aren't recreating dyno software here

[Willo]

Is it possible to make it so that you can enter either road speed or rpm? I have a dyno sheet that is neatly broken up into 500rpm major and 100rpm minor increments which makes it easy but most people have ones that have road speed.

Here's a spreadsheet that will calculate speed based on rpm or rpm based on speed. You will need to know your tyre size, gear used, ratio for that gear and final drive. You can change the series of rpms or speeds to suit.

The example is using a R34 GTR in 5th gear for the rpm series used in the power spreadsheet.

It would be interesting to see how accurate the speed calculation is as it is theoretical and doesn't take into account real world conditions.

speed_rpm_calc.zip

[Crimpage]

EDITED

[Bass Junky]

So what have we come up with?

[Willo]

Graphing it is pretty easy. Is there really enough interest to bother turning this into a database and pulling the data dynamically?

[Bass Junky]

Wilo.

That looks great!

There sure is enough interest.

It could be part of the Turbo upgrade thread.

[Abo Bob]

I reckon. I'm interested and so is Bass.

[tridentt150v]

It'd be good if the whole idea was comparing apples with apples.

I know its hard to do, but to compare the performance of a GT30R with a HKS 2835proS [as examples] would be a good thing. But to do this you need [ideally] two cars exactly the same or one car using both systems. This will never normally happen.

I know at the moment there are only a few results posted, but what happens when you get 20-50 results, the graph would be flooded.

To overcome this situation, maybe the whole exercise needs to be split up into stages of performance development.

More complex, but better definition.

[Bass Junky]

Well if you can pick from them dynamically, you can choose who you want to see.

[tridentt150v]

Arrgh, the penny has dropped, I'm slow on the uptake. That is a truely good idea. You got my vote to do it if you need it. So, a master list and a blank graph?

[Lithius]

I'm definitely interested too, I think it's a great idea that will end up getting a lot of use, especially as the number of cars added into it grow. It will also save a lot of people from posting threads asking about what sort of power they can expect from specific mods/turbos etc.

[Bass Junky]

Will also allow people to have four or five of their own graphs to compare against each other.

you would be able to pick up to say 10 graphs and they display.

Could sort via highest, best average between 4500 and 7500 etc. etc.

[tridentt150v]

Stop talking and get on with it..............lol. Sounds very good to me, it will be interesting to see what makes power and where they make it.

BTW I'll bring my dyno chart in tomorrow and provide some some figures.

[Willo]

I haven't mentioned my daily rate yet

Ok, this is a spare time project so don't expect results yesterday. And while I will listen to suggestions don't expect miracles.

The first phase will consist of:

- a database to store car, rpm (any rpms should work and not specifically those in the spreadsheet), power at each rpm(kw), engine type, turbo type, and a description field to outline mods.

- a php page with a list of cars

- a graph page showing output for the selected cars

- possibly a page to add your own data (if this gets abused I will pull the site)

Once this is done I will start looking at extras/wishlists.

And if someone else is going to build the same thing speak now and I won't bother, as I can't be assed with duplicate effort.

Now we have the rules, I'll start building.

[Bass Junky]

Rules sound good.

We need also to have the graph work on kph as well as RPM and should be either.

The problem with just RPM is that a lot of charts are in kph. Also different wheel sizes and stuff will effect rpm but not speed.

A lot of dyno operators are now printing out logs of the dyno run every 2kph. See attached.

Thanks heaps for taking this on man. its really tops!

[Willo]

I need two testers to upload their dyno data and generally give the site a shakedown. It would also be helpful if you know your tyre size and gear ratios to test the RPM/Speed conversions.

PM if you are interested.

[Crimpage]

Wow that was quick. I did start a page before with car, engine, mods, comments etc that people could enter their data into. Then they could search/view the list of cars in the database and select the tickboxes for the cars they would like to see on the graph... That was the idea. I have only done the page which drops the info into the database. Sounds like you got this under control Willo, but shoot me a PM if you want help anywhere.

This would be very easy to implement a login using SAu forum name and password to keep it locked down to memebers only, however that will need access to the DB to check the encrypted password against...

[Bass Junky]

Willo.

Of course I'll test it!!!!!

[Willo]

Testers found, PMs sent, thanks guys.

Edited November 2, 2006 by Willo