Messages

At least i had the decency to let everyone know before hand that i was going to slip it in there. ;D

 I was 4th on the grid, watching phil and the lights! From my point of view phil did nothing wrong!
That is why i went to see the judge of fact to back phil. To me the penalty ruined probably one of the best races i have driven in a very long time, even with the competition backing phil the judge of fact was not going to change his mind :(   

Thank's bully for your perfect explanation, here is a little more info! At croft before the braking point at
tower corner engine rev's were just short of 7400, after the back chicane heading down to sunny's in
we had to lift off before the engine expired. We tested the uniroyal 165/65x15 which has the same
diameter as the michelin. All the circuits we drive have at least one section which is too long for those
tyres.

 We tested the smart car tyres at croft two years ago, NOT recommended if you want to keep your engine
in one peice! :(

Can whoever has got the club scales get in touch with a member of the tech comittee so that we can
arrange collection. Many thanks Mark.

After a fantastic weekends racing at spa, is it not possible for the club to organise and partly fund a weekend at spa. The track and facilities are second to none! What a way to celabrate 20 years!! ;D

Now i am back to the land of normality, i will chase up the chopper blade conversion that we are having made.I would like to thank the hollis/harper/coghill team for all there help at spa,THANK YOU ALL.(what a top weekends racing).Well done to everybody involved. ;D

Buy a set of turned and cambered arms from paul robertson then send them to me for the belguim arm
conversion, both of which are proven!

We (as a club/tech comittee/management comittee) are having discussions with the manufacturers as to
what is the correct material shape and profile for our needs. We are not going to rush into a product that is not what we want! I believe experiance and research count for an awfull lot. Time and testing will tell us
everything,so stay tuned! We will keep you all informed on progress ;D

Replying to the many questions/comments on this seemingly frustrating subject!
An order was placed yesterday for 400 one piece stainless steel valves which will not be available untill
after the final 2x rounds at Mallory park.
Going onto some of the points raised by Andy regarding the tech comittee,
current valve materials:-
I am speaking to York university as to having currently available valves tested,i will keep everybody informed as progress is made.
Progressive valve springs:-
I have tested with progressive valve springs and have found no difference in performance or reliability
over standard double springs.
Valve spring rates:-
Valve spring rates are different from valve to valve, mainly due to valve weight but cam profile and rocker
ratio and max rpm come into the equation.I will post some recomendations in the next few days for the
current valves.
Valve springs going coil bound:-
If your valves are installed to standard citroen spec, the valve spring cannot become coil bound!
Valve bounce/too many revs shows the same markings on the valve springs as going coilbound.
Suggestions:-Check insalled heights/fit a rev limiter!
I am currently testing the effects of heat build-up on all types of valves available because i am convinced
that most people are running their engines too hot, the car that won the 24hr this year ran a 9 blade fan
and suffered no engine damage whatsoever.We ran a 6 blade fan and still over heated the engine on one
side.
I will post my results in due coarse.
Mark. Whitwell Motorsport.
                 

I had a conversation with another club member last weekend who is running stainless steel valves and has
done so for several seasons and claims to have had no problems since fitting them!Could this be the answer
or do we investigate further?
Bully, i have sent the file to my engineering works, just waiting for price and time scale.

Unfortunately all of our engines have suffered in varying degrees.All the valves we fit are new with new
valve springs (inners and outers). After only two hours of track time we are seeing upto 30% leakage
through valve distortion.It is now getting very tedious and expensive.Ramp speed on closing is probably
a major cause!

Sorry about the spelling mistake :o
All season we have been trying different valve spring rates and still suffer with the same problems.
Make the springs too strong and the valve heads fall off or distort, make them too soft and the valves
bounce at high-ish revs and you end up with the same results! DEAD ENGINES
Is it not about time this problem was sorted out properly, or do we all go and have valves made from
stainless steel.
Most people know what the fault is!! :-X Let's get it sorted out now so that everyone can have some
reliability(for a change).

We have had to replace both inlet and exhaust valves after just two hours of running all this season!
We have had problems with both the standard stem and the waisted stem valves each with different
faults. ???

How big was that country mile again? Is it 9 or 19 laps? MUST get my eyes tested! or hearing checked!