Hillclimb & Sprinting

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David
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Re: Hillclimb & Sprinting

Postby David » Sun Oct 23, 2011 10:46 am

Last sprint of the season yesterday -- Rochester Motor Club's event at Lydden (which IMHO rates as one of the top six sprinting tracks in the country). Weather was perfect: unbroken sunshine, not too warm.

JPSC honour was upheld by Jeff Wiltshire in his immaculate 2000cc Phoenix and Mark Cheevers in his lovely (and also 2000cc) Fury, both running in Class A8 (Road-Going Kits over 1700cc), and me in my 1400cc "Marmelade" Striker in Class B9 (Modified Specialist Production Cars up to 1400cc). Astonishingly, all the road-going kits up to 1700cc had stayed at home -- something I don't think I've ever seen before. Benchmark competition came (as usual) from Paul Bowden (A8) in his 1800cc Caterham R400 and the similar (but much lighter) machine of Gerry Fincham, who has to run in Class c12 (Sports Libre) as he has a "one-off" racing chassis.

Practice showed the track to be surprisingly slippery (unusual: Lydden normally has high levels of grip), but we all got round safely. However, Jeff was looking for a problem with his car until he realised we were all having a little trouble staying on the black bit. However, his efforts were sadly prophetic as he did indeed suffer from some diff woes by the end of the event.

The four single seaters were untouchable as usual (aero is really useful with so many fast bends), producing the FTD of 72.25s. But there was a fair spread of times, with the slowest of the fifty cars being over 110s. Good organisation by RMC (who seemed to have borrowed the very experienced TWMC team) ensured that very few cars needed re-runs for catching slower cars.

Of "our team", Jeff gave it all with his ailing Phoenix to produce a second timed run of 86.77s (a full four second improvement on his first run) for third in class and 16th FTD, Mark came in with 84.68s for 2nd in class and 12th FTD. Paul took the class win with a time of 80.67s (7th FTD). Unusually, in the "cross class" competition both Gerry and I managed to beat Paul with times of 79.92s (6th FTD) and 79.17s (5th FTD) respectively. Good game.

What is not so good is the disparity in the "non-road-going" classes. Gerry won Sports Libre by 5s (with the third car 18s off his pace), and my Striker outclassed the small-engined Mod-Spec-Prod field by almost 12s (with second, third and fourth covered by half a second -- could have been a great battle for the pot had I stayed home). The essence of sprinting is competition (which is why Gerry and I have to look "across class"). My advice to anyone starting sprinting in a kit-car of any sort, is to run in a road-going category. There, you are almost guaranteed good stiff competition in your class on the day. The only place I know where you will find serious competition from other kit-cars in non-road-going classes is in the WSCC Speed Series -- and there I think you'd find the word "stiff" an understatement :shock:
Se7en Pervert -- by definition; I don't drive a Caterham

jeffw
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Re: Hillclimb & Sprinting

Postby jeffw » Sun Oct 23, 2011 6:35 pm

I was 2.5 secs slower than I had been in June so something wasn't right....still looking for the answer to that one :(

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dopdog
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Re: Hillclimb & Sprinting

Postby dopdog » Sun Oct 23, 2011 8:09 pm

Do you have a video for us to watch Jeff? I like to see what is going on :D

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Re: Hillclimb & Sprinting

Postby jeffw » Sun Oct 23, 2011 9:07 pm

Not very good run I'm afraid so I've not rushed to put it up on youtube...

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David
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Re: Hillclimb & Sprinting

Postby David » Sat Nov 05, 2011 11:31 am

jeffw wrote:Not very good run I'm afraid so I've not rushed to put it up on youtube...


Certainly haven't :p
Se7en Pervert -- by definition; I don't drive a Caterham

jeffw
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Re: Hillclimb & Sprinting

Postby jeffw » Mon Nov 07, 2011 6:45 pm

It is slower than in the summer so I'll not bother people with it....you went a lot faster than I did David so I should be looking at your vids :)

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David
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Re: Hillclimb & Sprinting

Postby David » Mon Nov 07, 2011 8:08 pm

Jeff

To hell with the weight penalty, I've decided to "bite the bullet" (or rather, fit a bullet cam) for next season, so both video and DL should be available. (This year, only Chris had the kit).

David
Se7en Pervert -- by definition; I don't drive a Caterham

jeffw
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Re: Hillclimb & Sprinting

Postby jeffw » Mon Nov 07, 2011 9:18 pm

Cool. Let me know if you need any info about my setup. I'm going to try and get a 1080p camera to go with the wide-bodied, supercharged Phoenix.

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dopdog
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Re: Hillclimb & Sprinting

Postby dopdog » Wed Nov 09, 2011 8:54 am

when did you sneak in the supercharger Jeff ;) will this be ready for next year and also which one are you going for?
also wide body!! sounds like some big rubber is going to be ordered as well.

jeffw
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Re: Hillclimb & Sprinting

Postby jeffw » Wed Nov 09, 2011 10:40 am

The idea is to re-arrange the rear trailing arms so that they are parallel to the chassis rather than pointed outwards. This will give an extra 10-15mm inside space on the tyres. Then I am having the wide Fury arches added to replace the standard rear arches. The widebodied Fury is 64" rather than the 60" of the Phoenix. These changes (and a bit of paint) will let me run 8J rears with 215 or 225 section tyres which will be a great increase over the 185s I'm limited to at the moment. I'm also going to get rear discs on the car for this.

The supercharger will be in the new year probable and will start as a the low boost kit from Omex which should allow me to run 270-280BHP on stock pistons rods. The next year I'll change rods & pistons and replace the pulley to take the car upto 330-340BHP. At which point the gearbox/axle will take a bit of a beating but we will see.

The wide body is all ready booked in but the supercharge is still in discussion phase.


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