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Simon BiTurbo
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Simon BiTurbo

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+Nexox Enigma​ for inspiration :)
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Simon BiTurbo

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Little bit of work done on the Spitfire yesterday.

In order to move some weight further back (and lower down) in the chassis, I've got a GT6 fuel tank. Originally I'd planned to have a fuel filler in the wing like a GT6, but I've had real difficulty getting a pressing to weld in the wing.

So, I decided it would be easier to relocate the filler neck so that I could use the original Spitfire centre of rear deck fuel filler.

Cue some angle grinding and filing (I bought a hole saw in the right size but it turned out to be made of cheese) and a little bit of methodical welding to ensure there were no gaps and job done!

Now I just need to weld in pickup pipe as the stock one for the GT6 won't flow enough to keep the PI system happy...

#Spit6  
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Colin Fahey's profile photoSimon BiTurbo's profile photo
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Ah those pneumatic things? I think that would punch through the shell rather than lift it!
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Next little bit of work on the Spitfire done.

There's a bit of an issue with overheating and subsequent cavitation on both the stock Lucas pumps on the Triumph PI system and the Bosch replacements that a number of companies sell.

So, this is the beginnings of my solution. I've cut a little patch out of the rear of the car and welded in some mesh where there should be a low pressure recirculation when the car's at speed.

I've also done a similar thing to the rear face of the axle tunnel which will hopefully be a higher pressure area when the car's in motion.

The net effect of this should be a flow of air over the pump which will be mounted on the boot floor and covered in a box, thereby keeping it cool.

For extra cooling, and cooling while stationary, I'll put a cooling coil in the pipe feeding the pump, and underneath that mount a small 12v electric fan pulling air up through the floor of the boot, cooling the fuel and thus cooling the pump.

The little fan will be wired into the radiator fan at the front so it should only cut in when it's stationary in traffic or running extra hot. Also, by mounting it away from the other vents the fan won't block any airflow when the car's moving :)

#Spit6  
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Benjamin “Feral” Selinger's profile photoJohn Bump's profile photoSimon BiTurbo's profile photo
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Agreed. Makes them look more e-type rogue than straight-laced db4...
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Vive La France
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Mattias Schlenker's profile photoSimon BiTurbo's profile photo
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Good to know as i've got one myself :)
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So this is what I've been up to for the past couple of evenings.

Replaced part of a floor panel in the Spitfire and cut up the body a little to clearance my gearbox mounts and longer gearbox (still a little to be done in that regard).

I fear I won't be able to do much more for a while unfortunately as the reconditioned alternator I spent two days swapping into the Alfa (it's wedged inbetween the firewall, the rear bank of the engine and the subframe below it) has decided it doesn't want to be an alternator anymore it would rather be an electric heater so after a couple of miles driving I lose all power and

So, it's back out with that, swap the voltage regulator, back in and hope that cures it :)

That would be less awkward if the Citroen didn't need a new water pump and the Jag didn't need new diff bearings I should have changed before swapping the LSD in...

#Spit6  
#MoCarsMoProblems  
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Simon BiTurbo's profile photoJohn Bump's profile photo
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I know there's a 30x30cm area that's gone, but I can't help but think the adjacent steel's also pretty rotten.  Realistically, the car needs both pans and sills replaced, which is very nearly cut the shell in half and weld in new.  As such, I look with considerable interest at your projects.
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Next little bit of progress on the Spitfire. Notched the chassis to provide clearance for the speedo drive.

Used my favourite method of patch forming which is to cut the patch to roughly the right shape, weld on the bottom edge then bash with the ball of a hammer until it conforms to the curve that you want.

Works perfectly :)

Oh, I've also discovered that my overdrive unit is actually from a Volvo which caused a bit of a panic when I discovered that the speedo drive is geared differently and has a smaller socket for the speedo cable.

Then I did some maths and found out that the speedo gearing will over-read by 2.86% compared to the standard saloon gearing.

Considering that (depending on tyre choice) my speedo would under-read by between 2.71% and 4.9% so that change cancels some of that out I'd call that an accidental win :)

It has meant I've had to grind down my speedo angle drive cable which, with hindsight, wasn't really the best way to do it as it'll probably unravel (turns out it's a coil of spring-steel not a solid rod). I'm thinking I'll stick a thin layer of chemical metal onto it to stop it from disintegrating and see how long it lasts...

#Spit6  
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+Benjamin Selinger should be seeing the stuff you post.
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Simon BiTurbo

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Quick question: Does anyone know what thickness of metal you really need between the bores for safe use without poking a hole through your cylinder wall. Block would be cast iron if that makes a difference...
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Nexox Enigma's profile photoMark Morel's profile photoJohn Bump's profile photoMattias Schlenker's profile photo
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To be a bit more precise: Most car makers allow a 1mm larger bore as maximum. This one millimetre should work everywhere.

However, if there is no cooling water between teh cylinders sometimes 3mm is possible. But, even if the block itself proves stable with these three millimetres, you might run into head gasket issues. So you should probably ask people who did a rebuild of the same engine type which maximum is considered safe.
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Pretty pleased with how this is coming along :)

I’ve been looking for a cheap car trailer for a while but even second hand they’re £1000+ which is far too expensive for my cheapskate ways. So, we formulated a plan involving a caravan chassis (£200 on eBay every now and again). A couple of weeks back we found one dumped on the side of the road so we went and took it!

Took two days for the three of us to dismantle and take to the tip. Ordered up 9 2m 60x40 3mm box sections for £8 each, 8 metre-long angle iron sections and 2 2m x 1m 3mm checker plate. Just finished welding the frame onto the chassis itself (doesn’t look like much but it’s 70 lines of weld with all the prep that that entails). Next comes cutting the checker plate in half and welding that on, sourcing an electric winch, wiring up some lights and fabricating some ramps then it’s good to go :) all for roughly £400 :)
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It's fairly common to do that with old boat trailers around here. I lucked out and found a really good deal on my 16 ft car hauler.
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Speaking of exciting Spitfire developments, look what arrived today!

Fresh from Quaife Engineering in Sevenoaks which is actually very close to where I work. If I'd known I'd have gone and picked it up!

#Spit6  
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I'm glad to hear they're still making them.  Some day, if I win the lottery... yeah, those cost more than I paid for the car, by quite a bit.
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Simon BiTurbo

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Here's why I think the Fiat 124 Spider will do well...

When was the last properly small, lightweight, RWD, turbocharged sports car?

I really hope tuners get hold of this fast. Based on what's already available for the 500 Abarth you should be a remap away from ~190bhp, a couple of bolt-ons away from ~220bhp and capability up to 300-360bhp :)

All in something that's 1100kg bone-stock :)
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Ryu Hayabusa's profile photoJeb Hoge's profile photoSimon BiTurbo's profile photoMichael Gooderham's profile photo
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The pricing will probably be slightly more than the MX-5.
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Simon BiTurbo

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So I deemed some of the box section at the front of the Spitfire to be surplus to requirements so attacked it with a hole saw. So far we’re up to 425g cut out of the front end (so measured with bits placed in my ‘chapman’ box).

Also finished the last bit of welding on the floor. Now I’m drilling holes in the rear so high-pressure air at the back of the car will force itself into the boot, thus cooling the fuel pump that will be there eventually :)

#Spit6  
#AddLightness  
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Michael Gooderham's profile photoSimon BiTurbo's profile photoJohn Bump's profile photo
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First I have to get access to a filament winder...  _sigh_
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Simon BiTurbo

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+Wayne Moyer and +Megan V for Pinto Wagons...
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Wayne Moyer's profile photoJustifiable Jeep Junkie (J³)'s profile photoBenjamin “Feral” Selinger's profile photoMatt Luckow's profile photo
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I feel bad, but I absolutely love it.
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