Monday, August 27, 2007

Corner balancing - my suspension height is way out!

I went to Melbourne Performance Centre again today to get the car on the scale! Well besides the fact that I need a diet (because I was also asked to sit in it), the suspension height is way off. There is a 10mm difference between the left and right rear suspension when Mr fat Taka is in-situ smile_sad, and the weight for each corner is way off too.

This is the scale and wires ~

The plates goes under the car.

Adjustment is needed for all 4 corner but mainly the right rear. I helped too!~ but I had a slightly easier job. smile_embaressed

Total weight of the car, with me (91kg) in it is 1430kg.

The corner of each car is like that and of course, with the driver in the right, the right side of the car is going to be heavier. The main thing they are trying to adjust is the right front to left rear ratio, or the cross ratio. This is aimed to be 50% when corner balancing. With me in it, the front is 52.1% and the right is 52.6%. So I am contributing to 2.1% and not quite 50:50. I need to lose weight, don't I. I also have the car in 3/4 tank of petrol to simulate what I have mostly on the track. I normally have a full tank to start off the day and reach to 1/2 by the end of it. So 3/4 of tank is the best.

Dean, who did the car up for me at MPC, said that if the balance is out before you will find the car will prefer to turn to one side under brakes, especially in my case where the rear is off. Actually in the last few track days, I found the car turned better to the right then to the left, which I struggle to set the final corner of Broadford.

Let us see later what this do.

By the way, the A048 is quieter than RE55s Bridgestone but they are still noisy.

Wednesday, August 08, 2007

My Knight Sports 4 BEAT tune

This is the way to tune the car. Now I have it!

Here is my story and all the picture are taken from mobile phone (*sorry it is so bad :rolleyes: ).

From Knight Sports Website

そして実際の空燃比は、ノーマルの場合、2000-9000まで約12-13になっています。
Normal AFR is about 12-13.

ノックレベルをみながら思い切った燃調を試しましたが、結果的には13-13.5がベストパワーに
なります。  Considering without pinging, the best AFR is 13-13.5

結果的に点火が進み、空燃比がストックデータより約1ほど全域で薄い状態ですが、3000rpm
以上で、全域にわたり6-7馬力のアップ。排気効率の良いマフラーとの組み合わせで11-12馬力
アップします。特に中間域がきちんと上がっていますから、扱いやすいパワーカーブです。
Too technical for me for most of its parts: Essentially they talk about advancing the timing and if the AFR goes from low 12 to low 13s... one expects 6-7ps increase all the way from 3000rpm, with good flowing catback combination can achieve 11-12 ps. Mid range will increase mainly.

燃調と点火以外では、スピードリミット、レブリミット、電動ファンの作動温度設定、メタポンのマップ変更も
可能です。
Besides timing and ignition change. Speed cut, fan control.

弊社のデモカーでは、ファンの設定を88度にしている為、常時90度以内で水温が安定しています。
また、WDSによるチェックも行っていますが、異常は検出されませんし、アップデイトも問題ありません。 Fan is set at 88 degree. WDS can still check codes, update (?refresh) will be ok.

Now.

The morning started with me going there very early

  

The tuners arrived in a few several minutes ..... They come and inspect the dyno carefully My car gets on the dyno and do the initial run 119kW only

  

The guru... the gentleman on the right is the president of Knight Sports - a man with a few words. The tuner opens the ECU cover. Need some adjustment on the board to install the map

 

One is plugged to the harness and one to the other (bottom loop). Then he keys in the all the important data.

 

Uplading ... 30%. When the upload is finished. Check with the dyno graph again.

 

Finish ... a sticker of approval! smile_regular

 

Dyno chart

Power to Torque

 

Power to AFR

I have some driving impression... but I will conclude after cold start tomorrow.


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