carburettor

[helen deeley]

And the gooseneck could loose you a second in one corner alone, if not done abosolutley perfect and BIG balls in your pocket. ! :)

which is the case whatever carb you run

[Trevor Williams]

Bully I have to disagree with you that the times are comparable to the last time at Cadwell. Have a look at the comparisson in you other post

What you are basically saying is that any performance gain has been negatated by the new tyres and weight limit increase? But all through the discussion here and at the AGM. the performance gain was pushed. And yes, it is an option to use the weber. One that Neil Thompson described as necessary at the AGM in order to keep up! Thankfully, Matt has proved this wrong

The teething problems should not have happened. The Weber carb was sold as a "bolt on". Look at the first few posts in this thread. From what happened at Cadwell, it isn't! And the airfilters didn't fit properly either!

As for all information being shared, so it should be! We are basically now running a control carb. with no adjustments allowed. As for the clainm that it would get rid of fuel surge / starvation. it didn't. Even after the float height adjustment I was getting fuel starvation at the Hairpin and Park. This was not meant to happen. This will just force people to spend money testing when they were led to believe it wouldn't be necessary.

And what use is a theoretical laptime? Factually. the laptimes were slower!

All in all. and in my opinion, not a very successful debut.

[Paul Robertson]

I would have to agree with you trevor.
The fuel surge i find difficult to explain but will be looking at this further ,unfortunately i no longer possesss the prototype carb so cannot use that to see if there is any direct difference in the carbs.
The loss of power i don't,when the carb was set up it was december and very cold as was all the testing,this has lead to the carb being richer than it was in any of the setup work we had done.
None of us thought that the board would insist on not being able to change jets in fact the recommendation was that only the emulsion tubes be fixed and that the initial set up was just that.Sammie and i actually gave three options for the secondary air corrector .
To try and correct this mistake mark sammie and myself spent last saturday afternoon reassessing the jetting and have come up with what we believe will be a solution .Sammie and i are going to test it at mallory next wednesday and if it works we will be asking the board to allow the new settings.This is all at no further expense to the club.

Paul

[Andrew Bull]

A theoretical lap time gives you a much more accurate indication of what the car is capable of and negates most of the variables of driver performance over a single flying lap.  Look at the fastest laps, not one ultimate sector but a reasonable time in each. 

Its like CP vs Cpk (for anyone in the process engineering business) Cp gives you the process performance, in our case the process is the car, and the Cpk is the output performance, (which would normally be the component produced) in our case the lap time performance including the driver variable. 

What we COULD say is that the Car is capable (Cp = the process performance) of producing times that are 2 seconds faster, but the limiting factor is the capabilities of the extra variables (CPk = total output performace) added to it.  Driver and consistency of the perfect single lap.

An analogy that some may see others may not.  Sorry if you dont see it. 


My final thought is that this could all be bollocks, the cars are the same, and the drivers that are out there are as good as they were, although different ones at the front (matt, sammie and Gadet continued this year) and some small wind variation and track conditions could be the only variable that makes a blind bit of difference.


I'll Fuck off and leave it alone now. Lets see what happens at mallory......

Cheers

[Andrew Bull]

Paul, does that mean you are a weber carb down, and the club owes you one?

See you tonight

[Paul Robertson]

No wayne had the prototype at cadwell and i had his club kit.

[Nick Roads]

On Friday this week I tested an engine (admittedly rebuilt) with the weber against an engine we used at Snet and which qualified us 15th and was our best engine. We ran that engine for around 13 hours before car came in misfiring etc and was swapped. We realised in the winter that it was only a points problem. We fixed the points and did not even change the oil on that engine.

The Snet engine thus was running the SOLEX and we were at Llandow and managed to match our best times from last year on the Toyos.

Swapped to the rebuilt engine and the weber with a level engine. Immediately we were around half a second quicker but with fuel starvation on right hand bends. Adjusted one side of the engine up slightly lower than for the SOLEX and no problems.
For me I was a second (its 60 to 61 seconds approx around Llandow) quicker so Weber seemed better. Engine and carb seemed to have more torque/ power.

So seemed a success. We would expect the engine to need tilting for Mallory so have left it at same setting as not doing any more tesing before qualifying..

If all carbs are the same and no-one can set different jets etc would suggest a more level  performance across the grid.

[gadget]

i think we need the stig