rapidos

[rapidos]

Now finished :




Total weight saving here : - 3.4kg
The fix extinguisher weights 4.35kg, minus the new driving wheel (minus 1kg), I still have a neutral weight balance.

[Herman]

Deleted

[rapidos]

A lot of work done, looks great!

Thanks Herman !

Here are my quick realease fasteners: 2 for the front clam, 2 for the rear clam.
It was quite hard to find out which one could fit the car as the Protex company has such a wide range of different fasteners !
I first wanted some lockable ones, but I finally decided to go for the same that are used on Radical cars. I can not locked them, but if they do the job on a Radical, they should fit on my car !
The main advantage is...the weight !

[rapidos]

Today, minus 0.51kg




If anybody interested with that tube, PM.
And also the part that will fix the rear clam to the chassis:

[rapidos]

A small update... The shear panel is only 0.3kg lighter... It's half carbon, half kevlar and extremely resistant. Very hard to cut...

Air admission now in place:



Some home made stickers for the dashboard...

[Dennizz]

[rapidos]

This is one of the part supporting the rear pc, with on top, the lower part of the rear wing foot.

Here is the flap I will built.

The rear wing and its feet.

And how it will be fixed on the chassis:

Number 3 is supporting the total weight (rear pc, rear wing, downforce).
Number 2 is reaching 5 cm above the rear pc. This allow me to take out the rear pc completely in 5 minutes.

[rapidos]

Today I made the lateral air intakes, but as I have no time remaining to put further more in carbon fiber, those are basic fiber glass.

Still half a kg of gain.
I made a flexible carbone/epoxy sheet to close the air/air intercooler:



I also built the two flaps , here whitout finition :

130gr lighter compared to the original carbon ThorneyMotorsport flaps.

With my new rear body, I have no access anymore to the Ohlins cylinders. They are now inboard with several advantages :
-Less heat for the suspension fluids as they are far away from the engine.
-They are now easy to manipulate for changing the setting during track days.
-Their weight (around 800gr) is migrating to the front for better balancing.

[rapidos]

This is THE modification that can change the speedster handling
This is... 113gr oem :

I made a light carbon fiber copy weighting only ... 15gr !

As I was fitting it back, I had another idea...
I made this super heavy duty carbon fiber hook, weighting a massive...3gr

Weight saving here -110gr !
Ok, I agree I now need a doctor.

[Gerard]

Ok, I agree I now need a doctor.

I'm sure you're not alone here.

[rapidos]

Here is the oil intercooler air intake :


...and the air/air intercooler :

[rapidos]

Last piece in flexible carbon fiber for the oil intercooler (lower part) :

In place...

I will use some foam to get it absolutely hermetic.

Here is one flap ready for finish (+5gr) :


I worked all the day outside with the sun, and above all, my new shoes arrived...

[Pipo]

What I don't understand is why you reconnected the oilvapour-ventilation pipe to the air-intakepipe. It is more complicated to make because of the small T-connection you have to make on the intakepipe, and the intake of the oilfumes make you lose power by lowering the octane-level .
Why not just ventilated the oilvapours into the air via a small filter. That weighs less then the 50cm rubber hose

[rapidos]

What I don't understand is why you reconnected the oilvapour-ventilation pipe to the air-intakepipe. It is more complicated to make because of the small T-connection you have to make on the intakepipe, and the intake of the oilfumes make you lose power by lowering the octane-level .
Why not just ventilated the oilvapours into the air via a small filter. That weighs less then the 50cm rubber hose

Hey Pipo ! Interesting. You are right, it's a lot harder to build... I never heard of this loosing octane level with oil smoke burning ! Thanks for telling... Could you please explain it to me more in details or provide me with your source ?

[Pipo]

Now your asking me something...
It's something I picked up during discussions on technical forums.
I remember that one of the reasons not to introduce the oil vapours into the air induction pipe, was because those vapours are hot. And heating up the intakeair makes you loose energy.
Second reason was that the energycontent of oil-vapour is less then that of premium gasoline. So the total energylevel of your fuelmixure drops.
Third reason is that the octane level of the gasoline is raised bij additives they add to the fuel. Let's suppose a normal fuel mixture is 50% air and 50% fuelvapour . So 50% of the fuelmixure contains octane raising additives.
But if you inject 50% air, 45% fuelvapour and 5% oilvapour, only 45% of the mixure contains octane raising additives. Thus dropping the total octanelevel.
Maybe there are some other, very complicated chemical reasons. But I hated chemics on university, and I still do So I invite others to explain that.

Now we are not talking big numbers here. But I read a test once where a 2 lt engine lost up to 7 BHP on a summerday by this. Will you feel it? Probably not. But why waste them if the solution is so simple.

PS to suit the 'green' guys, I have to mention that following my advice is not good for the environment. And can be rejected at the annual MOT.