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Mark (smokey mow)

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Everything posted by Mark (smokey mow)

  1. Mark (smokey mow)

    Walker St Clair

    You wont be able to tow with the Walker St Clair cover, they baloon much like a parachute. Personally I use a tonneau cover to keep the inside dry but I think SBFS might do a cover that is suitable for towing with.
  2. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    Much anticipated, and as promised, but before i give you the rebuild thread, first a history lesson...... Whenever I seem to mention Formula four people seem to pause for a moment, look at me and then question "did you say formula ford?" my answer is of course "no" which generally leads towards discussions about what exactly was formula four? When I speak of Formula Four i am referring to the 1960's variety, although more recently the columns of the motor sports media is once again being filled with talk of both FIA and MSV Formula 4. This thread is not about single seaters with wings producing 185bhp and costing in excess of £30,000 but instead something entirely different and originating from the grass roots of motor-sport. Formula four racing can trace it's origins back to 1962 in the US where the first F4 races were held. The cars were typically scaled replicas of the F1 cars and powered by 250cc motorcycle engines. It didn't take too long for the idea to be brought to Britain by American Servicemen working in Europe and in 1963 Trak-kart built the 500cc Triumph engined TK. As the concept gathered momentum in Europe in 1965 Tecnokart in Italy began producing the Tecno powered by 250cc Ducati engines and In the same year the first Johnny Walker cars appeared from their Gloucestershire factory with the JW4 Mk1 powered by the 250cc Villiers Starmaker. Johnny Walker was better known at the time for operating a bearings and machine tools business but he had a keen interest in motor sports through his son Stephen for which he'd built a kart they'd successfully competed. Walker saw the potential of Formula 4 and their first car emanated from someone who approached them with a design into which they built in the 250cc engine. The car was initially competed against the 750cc motor-club cars and with the interest this created Johnny Walker Racing Ltd was subsequently born. They employed David Peers a racing designer as their manager, together with a couple of engineers with previous racing car building experience and entered negotiations with the RAC and FIA for the formula to be officially recognised. The first car the Mk1 was 250cc but this proved to be slow and unreliable so the 650cc Mk2 was born fitted with a BSA engine and reportedly was capable of 120mph around Castle Combe. One of the conditions of the new Formula was that the cars should have a basic price (complete with engine) for less than £650. And following the new formulas acceptance by the RAC production of the new cars began. The regulations allowed for 3 classes which were 250cc and 650cc using motorcycle engines and 875cc which used car derived engines. The Mk3 & Mk4 JW4's were fitted with 875cc Imp and Saab engines. All the classes were tightly controlled for cost and engine tuning. Initially while the grids were small the cars were competed with the 750 motor club in Formula Libre however for 1967 and 68 they had their series comprising of around 7 rounds which included the British Grand prix meeting at Silverstone in 1967. Notable works drivers at that time for JW4's were Bev Bond and Derek Minter who had switched to four wheels following his retirement from motorcycle racing. In 1968/69 Johnny Walker teamed up with aerodynamic designer Frank Costin and together they built a completely new car the Costin Walker. The chassis was designed for a number of different engine options including Imp, Honda, Saab and Ford. It could also take any FIA formula 2 engine making it eligible for Formula 5000. In 1969 the car was exhibited at the international Racing Car show at Olympia receiving much interest and publicity. It was unfortunate that just as Formula four was starting to get going Johnny Walkers firm suddenly went into liquidation. This left left Tecno as the only major manufacturer and a handful of smaller companies producing specials and in November 1969 Johnny Walker retired from racing. It's reported that altogether some 50 cars were built and shipped all over the world including Japan, Jordan, Sweden, Belgium and Germany. Formula four racing ended soon after, but the cars lived on by adapting to complete in many different series and in 1970 the 750mc took Formula four under its wing amending the regulations to allow for 1000cc engines and aerodynamic devices. The JW4 did however live on to be used as the base for the Jedi Mk1 and many of the original cars have since evolved and now wear Jedi Bodywork and modern motorcycle engines. How many original cars still exist i cannot be sure? Of the owners I have managed to make contact with all the cars are now "slicks and wings" Jedi's and I'm only aware of two other cars such as my own that may be close to original, one in the USA and the other possibly now in south Wales. So that's the history of Formula four.... soon to follow a bit about the history of my car...
  3. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    The final job of the day as the light faded was to fit the battery isolator switch. I also made a short teather for the key using a length of brake cable and a coupke of crimp terminals so it wouldn't go missing.
  4. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    The next job was to make the driveshafts. The JW4's used shafts and hubs of Johnny Walker's own design, however the Carburol Special ran an uprated design for hillclimbing with the uprights machined for BMC Mini stub axles and shafts. Unfortunately the shafts were missing from the boxes of spares I'd acquired so I would need to make some new ones. Starting with a par of standard mini driveshafts the length needed was measured and then cut to length. I happened to have a pair of driveshaft spiders that I'd had claser cut for the first car but the centre hole was too small so I opened this up to the required diameter on the lathe. Mounted back on the car to check the length and now just the welding to complete.
  5. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    A few more small jobs completed today.... The first job was the manual control for the mechanical fuel pump. Like most F4 cars of the period the JW4 ran a mechancial fuel pump which was driven off a cam on the back axle. These as you'd expect would work fine when the car was moving but when the car is stationary and therefore the axle not turning there needed to be another way of getting the fuel to the engine. The Pathe videos showed the mechanics frantically priming the pump by hand but as I studied the photos and videos a bit closer many drivers also employed another method so the pump could be controlled from the drivers seat. the solution they used was very simple which was a bicycle brake leaver mounted below the dash and cable linked to the pump.
  6. Mark (smokey mow)

    Interior / exterior projections

    Or buy a pack of baloons and inflate them to the right diameter
  7. Mark (smokey mow)

    Interior / exterior projections

    4" diameter ball floats are available from all good plumbers merchants for less than a fiver.
  8. Mark (smokey mow)

    V5 doc and sellin a car

    You can tax the car with the v5 document reference. you can also drive home from the MoT having passed without having to buy tax for that journey as the legislation allows you to drive to and from a pre-booked MoT.
  9. Mark (smokey mow)

    V5 doc and sellin a car

    Yes and Yes Between certain hours you can notify the owner change online https://www.gov.uk/sold-bought-vehicle but at other times it would need to be done the old fasioned way. The new keeper can tax the car on-line immediately with the document reference on the new keeper slip.
  10. Mark (smokey mow)

    2019 Speed Series Regulations

    I read that as yes unless its written into our own series regs to permit the use of something smaller
  11. Mark (smokey mow)

    2019 Speed Series Regulations

    It most certainly is! i think section S 7.1.3. Would apply here "Cars conpeting in hill climbs and sprints must comply with Technical Regulations 10-15 and section J." if you're suggesting that this section of the blue book doesn't apply to sprints then nether will anything that has already been quoted by others about seats as that's also in exactly the same section of the book
  12. Mark (smokey mow)

    2019 Speed Series Regulations

    If the MSA rules are going to be applied so rigorously this year with regard to seats and headlights, can I assume that regulation 5.14.4 will be equally enforced within the speed series and we will all therefore have to change our headlights to 6" diameter?
  13. Mark (smokey mow)

    Spot the Difference – Bodywork

    How to tell the difference between a Narrow Body and a Wide Body If you don’t have a tape measure to hand then the two most visual differences between a narrow and wide body car are around the rear lights and also the shoulder panel next to the seat. Starting with the shoulder panel, a narrow car will have a flat, vertical internal panel next to your shoulder. On a wide body car the GRP tub is extended into the cockpit to create a scalloped or chamfered panel to give more shoulder room. These first two pictures show an example of the shoulder panel on a narrow bodied car. Whilst on a Wide body car, the first of these pictures shows the chamfered tub used with ZK bodywork, whist the second shows the scallop of the earlier “kit” wide bodywork. The second method of telling the difference between a wide an narrow is the shape of the bdy tub around the rear lights. The wide body chassis was available with either fixed or detachable rear arches; whist the narrow was only available with fixed rear aches. Therefore if the car has detachable arches, which can be seen with a join line between the tub and arch as in the picture below then it will be a wide body car. If the car has fixed arches then it could be either a wide or a narrow. These first two pictures show examples of wide body Westfield’s. Note how the rear lights are partially recessed into the tub on their inside edge in a square recess. On a narrow however the arches are slightly wider and the arch has a smooth contour into the main body with no recess for the lamp. Note: I am aware that there is also some wide body tubs they may have rear arches similar to the narrow and therefore it is wise to also check the shape of the shoulder panel also to help with identification.
  14. Mark (smokey mow)

    Engineering Shop in the South East

    CTM Performance in Dagenham I've used before for similar work.
  15. Mark (smokey mow)

    Spot the Difference – Bodywork

    The flange on the nose is certainly a different shape and I wouldn't be surprised if there are differences in the width or profile of the curve. The kit wide nose is more closely matched in its dimensions to the narrow nose.
  16. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    Hi Bob, its been a while, I hope you're keeping well. the firewall on your car was a very elegent solution which I like a lot, thank you for the photos. for our UK racing regulations the firewall needs to provide a complete seal between the driver and engine compartment to create a barrier against fuel spillage or fire. On this car the body is from the JW4 Mk2 so lacks the air ducts that were fitted to Mk3 body on your JW4 and my blue car. The rear engine cover on the mk2 is much lower than the Mk3 so the cylinder head of the engine sits in the airstream for cooling rather than enclosed within the bodywork. my hope is that a simple flat aluminium closing plate will be sufficent behind the seats cut to match the curve of the body, but I may need to get creative with carboard first to get the shape right.
  17. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    On the subject of the condition of the moulds, this shows an issue that wasn't overly apparent until the body had been pulled from the mould. When I dropped the moulds off with Applied Fibreglass we identified there was a few imperfections in the surface so we discussed applying a thicker gelcoat layer so these could be sanded, smoothed and polished out. The moulds having been taken from some already quite old and tatty bodywork transferred all the imperfections from these warts and all. Luckilly these all sanded out ok by progressively working through the grits and now all it needs is a final polish to finish.
  18. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    New year update. With Christmas the progress has been a bit slower over the last couple of weeks whilst shopping and family gatherings have taken priority, however there's still been time for a few hours working on the car while the weather has been favourable. There's not much to show for my time though as much of it has been spent sanding, fettling and cutting to get a good fit on all the panels. I was expecting a few issues as the moulds were about 20 years old and of unknown provenience and this has created a few problems with panel fit between the upper and lower body. It may have been that the moulds have relaxed over the years but I think possibly and more likely the old panels used to make the moulds had seen better days but either way the lower body had curled inwards whilst the upper body has spread slightly outwards. Its just about fixed now but I'll need to add a couple of small locating pegs between the two parts to keep it all in line. At the back the engine cover proved much more simple needing only a couple of small relief cuts to clear the base of the roll hoop, the Dzus fasteners I bought are also about 5mm too long for a tight fit so I've overed some shorter ones. One other job I need to think about is making a fire wall to close the rather large gap between the engine bay and drivers seat.
  19. Mark (smokey mow)

    help.. i cant post anywhere

    Hi Paul, it appears that whilst you've been away your club membership has expired and you you haven't renewed it.
  20. Mark (smokey mow)

    Mazda SDV, Build Number 3

    You need this thread Stu, there's a couple of dyno plots that also give an idea as to how much better the manifold is compared to the standard link pipe.
  21. Mark (smokey mow)

    The kitcar business

    I think engineering knowledge and the cost of build is also as much a factor as culture. just within the pages of this forum a greater percentage of new Westfield owners are now buying either factory built cars or modular builds rather than SDV's compared to a decade ago with a trend towards the ease of a complete bolt together kit of parts. the other consideration is price. With an average Westfield build costing between £15-20K that's a very good budget to put towards one of the many new or second hand sportscars from mainstream manufacturers.
  22. Mark (smokey mow)

    Westfield camera car

    From a brief look at the pictures it appears to be a GRP bodied pre-lit.
  23. Mark (smokey mow)

    Pre lit still registered as a Cortina

    What does it say under "body type" on the V5C? If it says sports or convertible then it should be an easier administration process to amend the "manufacturer" to westfield than if it says saloon in whcih case this would entail an IVA.
  24. Mark (smokey mow)

    What are these catches called and any idea were to get them from?

    Its a turnbuckle fastener https://www.woolies-trim.co.uk/category/60/turnbuckles
  25. Mark (smokey mow)

    Smokey's JW4 Formula Four Rebuild Thread

    The roads on that trading estate are so bad it felt like I was driving around a BMX track at times.

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