Fast fd !

[TitaniumTT]

Isn't technology great sometimes..... I think next Tuesday I'll swing by.... I'll have some time and I'll be in the area.

[RICE RACING]

Originally Posted by TitaniumTT

Isn't technology great sometimes..... I think next Tuesday I'll swing by.... I'll have some time and I'll be in the area.

DO IT! be crazy not too if you are around, there is not many of us with true fast RX7's, the more we all work together and get more of us to GET ON IT :-Oc==3 then the better it is @ the end of the day.

The RL system is just gag factor good! I have so many files and test results in this day and age of an over supply of information its sweet just to sit back some days and collate it all and see what you have done, the VBOX system is super for that.

On my web site I think I will do up just a dedicated page focusing on that testing with better laid out graphs etc, see how I go, done a few updates LOL.

[JhnRX7]

Did some testing today.



Here are two 90-140 kph runs. Run #2 was slightly uphill (about 2m) and run #3 was slightly downhill (about 2.5m). I am guessing this puts me somewhere in the area of 3.5 seconds. I can send the .dbn file if you want it.

Car is a 94 FD with stock twins setup non sequential. Medium-ish ported engine, 3" exhaust, intercooler, intake, etc. Both runs were performed at 12 psi on 93 octane (no water injection). Last time it was corner balanced it came to 1338kg with me in the car.

Log of one of the runs:



I started working on the power calculation following the formulas you have posted on your website. I went out and used the performance box to take some rolling data on level ground. I was able to calculate drag coefficient and rolling resistance. My car has the Mazdaspeed GTC bumper so I would expect a larger drag figure, however I got double the stock value... Rolling resistance was in line with your figures.

I'm stuck on the power calculation... I dont understand the variable "Vspeed = vertical velocity". I see my performance box has a channel for it, but it does not record any data. Can this be calculated?

[RICE RACING]

Just eliminate the vertical velocity component, only a VB3i will measure this properly or be of use.

Refer your performance to many FD3S in similar spec here > http://www.riceracing.com.au/vbox-ii...ing-tuning.htm

[JhnRX7]

Here is my calculation. I eliminated the climbing resistance portion of the calculation and plotted it in excel (pull was done on relatively flat road so it should be ok). I do not have a good method to measure wind speed so I assumed that as 0.

The peak value was 219 RWKW

[RICE RACING]

You are the first person in 8 years to use the openly provided information I developed as listed on my site congrats.

While the power is factual it is not hollywood in nature but it does match reality and cross checks, its a good tool to use to validate performance increases as all items balance, increased power = decreased times to and distance to perform any given test.

R.I.P Hugh McInnes (the Turbo Pioneer) who taught me all of this back before the internet !

[RICE RACING]

Yes, forgot to say if you want to email me your file, I will add a power channel to it and can look it over as well, just go to my web site and follow the links for email.