Saturday, May 10, 2025
Indicate The Correct Way
Monday, May 5, 2025
Getting Hotter So Cooling Down
Sorry for the long delay since the last update, life has been busy and expensive recently, so haven’t had much time to progress. Still here we go with some updates.
The original Spitfire radiator was all sorted via a third party well over a year ago now so it’s all pressure tested and ready for use. I need to make some new fixings and mounts for a cooling fan as the fitment will be nothing like the original setup and mounted into the chassis in a totally different position location. The fan itself is seriously overkill for the application, however I got it a good while back from a mate for only £25 and will certainly be sufficient for the job… and I have learnt from my Cobra build it is better to be over effective rather than under. I started off making four brackets, from 2mm alloy that will wrap round the side of the radiator, these will be held with some cotton/rubber bobbins through the original side m6 fixings. These rubber mounts will also act as vibration absorbing for the radiator on the chassis brackets (that still need welding on) so reduce the risk of fracturing the radiator.
The four brackets are fairly straightforward to fabricate and we’re all made in a cardboard template first. Once in the metal they fitted perfectly and have been painted up to look good. I am a tad concerned about the size off the cooling fan and the lack of natural air flow getting restricted through the radiator.. however with me converting to a thermostatic switch control this should allow hours of stationary running the engine (without natural air flow) and the fan will kick in and out accordingly.. and as mentioned before, it’s pushing significantly more air than required as it really is much bigger than requirements for the job in hand.Sunday, February 23, 2025
Phat Ass And Mud Guards
Since I have had the chassis rolling and the body fitted I have never been 100% happy with the width at the back end. I first noticed the potential issues when fitting the adjustable radius arms and my measurements for the brackets was significantly different to what was advised within the build guide. This I can only presume is the difference between using Spitfire running gear against GT6 running gear with a rota flex rear drive shafts. Still more than one way to skin a cat as such. As you can see pictured here the width of the car on standard spitfire running gear and my knock on wire wheels.
So my chosen option is to space the hubs by a significant amount really… 30mm each side!! Wowsers! I have researched this option in great depth and have seen some really bad examples and issues off the back of bad installations, but with the correct install using the correct components then I’m struggling to see what issues will arise really. Physics is physics after all! So I have specifically ordered hubcentric spacers machined to my 4 stud PCD with upgraded M12 x 1.5 studs as opposed to the original 3/8th on Spitfire. I also now intend to replace the wheel studs in the Spitfire hub to bigger more beefy Freelander M12 x 1.5 studs despite me already replacing these for original replacements earlier in the build. The advantage being I will then be able to torque the spacer to the hub and the knock on adapter to the spacer using around 110Nm as opposed to only 65Nm on the smaller studs. I will need to get some open wheel nuts with a 40degree taper as opposed to the ones in the picture here which are 60degrees, as they nip up ok but aren’t seating 100% against the knock on adapter. Also the bigger studs will be less likely to get stretched by over tightening and thus loosing the tensile strength and potentially a wheel when driving. This genuinely is a fairly common problem with Spitfires and if you look back in my blog to see the pictures of the previously replaced studs you can then see the effect of over torqued nuts!!
With the rear wheels now spaced and set correctly I was able to now make a start on fitting the mud guards. This has been a real pain in the arse from start to finish (and I’m not finished yet) and I’m really out on my own when it comes to fabrication and fitting. The build guide is extremely vague on fitting these, and what little information on the internet from previous builders all state they didn’t “beef” up the fixings enough and have lost mudguard during a drive…. Let’s see if I can nail this first time then!
I started off welding two bits of plate on each side of the rear drum back plate. I was intending to fit the two front guards first however after fitting the rear spacers I am now considering spacing the front wheels also to give me a tad more steering angle. The current setup sees the wheel voiding the body with about 1.5 turns of the wheel and if I was to space the front wheels slightly (about 20mm I think) should see me get a significant further turning pitch before voiding the body with the inside face of the wheel. I will be restricting the rack once all this is concluded so that I can turn lock to lock without fear of causing issues.
With the tabs welded on as my fixing point I have used some 3mm flat bar to create the frame to mount the mud guard. It has been a real pain in the bum if I’m honest and to make a second for the other side keeping the same spacing and symmetry is a tad daunting, which I’m not looking forward too… still onwards. I can’t really go into detail as to how I made this frame, it was just a tedious process of bending, adjusting, trial fitting, jacking up, wheel on, wheel off etc… etc… however the one side is starting to come together. If you see pictured here that I have added some strengthening sections welded down the two uprights and these take out soo much vibration and wobble that was previously present and have massively beefed up the whole structure which I’m very happy with, again to replicate all this for the other side is going to keep me awake at night as I want the arches to both sit evenly and equal each side.Saturday, February 1, 2025
Belt Up And Park Your Seat
So this update is primarily concentrating on the seat belts and the associated fixing bolts. I managed to drop on again on eBay and pick up some suitable four point harnesses which are very similar to the Cobra. I specifically wanted the aero style rotary clasp and black webbing, so being a tad specific I have been keeping my eyes peeled for some time for some to crop up at a reasonable price, and I managed to get a pair for only £50 which is a huge saving than if I purchased them new and direct with Willians.
The lower two strap fixings are fitted with eye bolts the inner of which utilises the original Spitfire fixing point on the chassis. The outer one is simply drilled through a bracket that was installed when I put the chassis outriggers and out rails on and then the spreader plate is fitted underneath allowing the eye bolt to bolt through from above. I’m going to fit some sound deadening pads to the floor pan sections under the seats, I fear this will be a tad boomy if not. The under seat void is going to be a real bummer for loosing stuff, as I’m fixing both seats without runners, so I might make a little baffle plate to stop stuff rolling around and getting impossible to access because of the seat position.
Monday, December 30, 2024
A Festive Blowout!
With the new year looming and some much needed funds received as Christmas gifts I have blew it all with very little to show for it really. The picture here shows you what £150 will get you on the Rimmer Bros trade account, along with frustration and disappointment added in for good measure. Firstly I really wanted (not needed) a fancy looking rocker valve cover and whilst these are not really massively expensive they aren’t cheap either… apart from the quality and finish.
However despite all the trivial setbacks I was able to fit the new water pump housing and pump, the thermostat housing with stat along with the original alternator and fan belt. The alternator I have had up to where I work and I bench tested it on the testing machine checking that it was all working ok. The only niggle with it was that the bearings were/are a little noisier than I would like, but to not have to replace it now is money saved on the ever tightening budget.
You can also see here that I have fitted the replacement valve cover which does look great, however I’ll reserve judgement on its practical uses once I have had a couple of engine run cycles, I have little confidence it is going to seal easily or effectively.
Saturday, November 2, 2024
History Repeating Itself
Saturday, October 26, 2024
Fog Light Fabrication
So today has been an awesomely productive and creative day. I started off rolling the car out the garage and putting back in face first, to give me more room to work around the back end. I have started to fit and plan out my rear end lights and fog light which has took some fabrication and modifications of some lamp units for an epic result. I started today by fitting the rear stop/tail lights to the guards themselves. I still need to fabricate and fit the brackets to hold the mudguards to the car itself so this is now on my radar to get sorted soon. The rear guards have the mouldings to accommodate a range of different rear lights. I have opted for the same as on my Cobra the Lucas 692 units, which are lovely lamp units to look at and are a perfect fit on the mudguards. The Lucas 692 units are shared on many cars of the era and are even the standard rear light units on the Aston Martin DB5 so it is certainly good enough for me. Fitting the rear lights is fairly straightforward. Start off by determining the centre point for the light and then I cut a 30mm hole to take the light unit but leaving a little movement to seat the light square and even. I then had to drill two 5mm holes for the fixing bolts and these are just simply secured from behind. I might consider making a weather splash guard for the underside of the mudguard as the electric terminals will take a fair old bash from the elements here so, prevention is better than cure in my opinion. The second mudguard is exactly the same process as the first as these are symmetrical parts and are not handed offside and nearside. Last bit her was just to bolt each light into the mudguards and rest on the rear wheel, waiting for the fabrication of the brackets.