Wednesday, July 29, 2009

IVA Re-Test

Yes, you may gather from the title of this post that the IVA test was a failure.

This had nothing to do with the fact that the fan belt slipped off on the way there, nor the overheating that resulted, nor the exceedingly soggy feet due to engine coolant entering the footwell. Nope - coz a random passerby produced a 10mm spanner from his pocket (I had one with me of course - a 10mm spanner that is, not a random passerby) and helped me get it back on before the test itself. The fan belt came off, embarrasingly, by the pully having become a bit loose - which was odd seeing as I would swear blind that I had torque-tightened it correctly.

It was certainly an interesting and stressful test - I spent a lot of it up on a hydraulic ramp whilst the inspectors poked around underneath. No no - poked around underneath the car.

My impressions of an IVA test are that it is long, tiring and very exhaustive. There wasn't any part of the car that wasn't poked, pulled, measured or at least scrutinised. The testers were very thorough but quite friendly (in an official sort of way) and happy to explain what they were doing at every stage.

It was a near miss I think, and most of the items would have been able to be addressed there and then:

1) The backside of the steering wheel boss scraped slightly on my MX5 improvised steering shroud. This was easily fixed by first knackering the old boss trying to get it off - perhaps someone had crept into the workshop at night and overtightened it, yes that must be it - and then grinding the back down slightly on a replacement.

2) Fuel pipes in the engine bay were too close to the steering column (even though they were protected by sheathes themselves, they may have interfered with steering). That too was easily sorted cable-tying them clear out of the way.

3) The fuel return pipe by the passenger footwell was too close to the corner of the aluminium tub so needed protecting. Another easy fix - I've drilled out a rivet and popped a new one back in with a p-clip holding a short length of rubber hose through which the pipe now passes.


4) There were a couple of cables in the transmission tunnel that connect to the gearbox which were not secured down. They're right buggers to get to, so all I could do here was use some plastic metal to anchor a couple of cable-tie anchors to the aluminium tub and strap them down.


5) The tester was not impressed at my ingenious use of gaffa tape holding the new cycle-wing indicator wiring to the underside of the wheel arches (even though it took me quite a long time to coax the tape off). This again has been fixed with some cemented cable-ties and anchor points.

6) There was a brake and fuel pipe touching at the back end of the car which could have led to terrible chafing. A bit of pipe bending sorted that.

Then there were a couple of things that really caused the fail as they wouldn't have been able to be addressed there and then:

7) An ISO-standard marking was missing from the brake fluid reservoir. After contacting Westfield about this they were very apologetic about not having sent one and shortly afterwards a sticker turned up in the post. The tester had been very particular about the durability of the marking, so I'm going to keep the sticker in reserve and instead cut one out of a brake fluid cap that was marked and made it into a pendant-type thing which is now held onto the neck of the reservoir with heavy-duty plastic coated wire.

8) There wasn't enough sign of auto-return on the steering. This has turned into my biggest bugbear - I've tried Westfield's advice of inflating the tyres a lot and toeing the front wheels in a lot - an awful lot in fact. And nothing worth noting. I then went on to replace the track-rod ends from the MX5 in case they were too stiff, re-greasing the steering rack itself, trying extra helpings of camber on the wheels - all to no avail. One of the problems with the SEi is that in cases like this (which Westfield assures me is just due to the new rack being stiff) is that altering the caster of the front wheels isn't possible - and it is the caster that primarily affects auto-centering. But a possible breakthrough occurred when I noticed that the steering auto-centered a bit when pulling the car backwards - so I tried toeing out the wheels as much as I could without them fouling the bodywork - and this seems to make it show some sign of auto-centering when going forwards.

Although it was a failure, I felt kind of proud - oddly enough. Well, the car had physically passed the tests - all the areas I had addressed for the IVA (with the exception of my gaffa taped cycle wing wiring) had sailed through. The speedo which I was concerned about - due to me modifying it and having larger wheels on the car passed OK. The engine emissions - bearing in mind I had almost completely stripped and rebuilt the engine passed OK, better than OK in fact. Exhaust volume, OK. Brake efficacy, OK. Visibility and mirrors, OK. Headlamp alignment, OK (after they helped me align them properly).

And out of all the things tested (which overall took about 5 hours) only a couple of them were things that required a paid re-test. The inspectors were very complimentary about the build, and found it hard to believe that I worked with computers and stuff rather than being an engineer or mechanic.

I did actually find the test interesting, particularly as I got to see the proper equipment that I had been improvising around not having in the garage during the build. The inspectors answered my polite questions about what they were testing and why and overall were very informative. They also gave some friendly advice on some improvements, such as silicone sealing some of the low-slung wire connections, and covering the underside of the main fusebox (which I have done with some latex rubber which I just happened to have lying around).

Oh - and it rained on the way back from the test station. A lot. But the car was great fun to drive, and handled surprisingly well. I can't wait until it's finally passed and road-legal!

Anyway, I've gotta finish this post coz I'm off for the re-test in a minute. I just hope that there is enough auto-centering on that damn steering for them...

Sunday, July 5, 2009

Ready for IVA Test

It's been a stressful couple of weeks trying to get the last bits & pieces done so that I've got a good try at the IVA test on Tuesday.

A lot of the preparation involved sticking on protectors that came with kit - such as the dashboard crashpad, the little rubber covers for the windscreen protrusions and about 1 billion nut & bolt covers on the front suspension.


Taking a belt & bracers approach, I've also put rubber edging around the edges of the front suspension arches and then extra foam rubber on the upper balljoint, the blunt end of the upper wishbone and the adjustment ring on the base of the shock absorber. And just for good measure popped some spiwrap on the brake hoses.

Some unwelcome panic was caused by finding out from Westfield that the side indicators on the body would no longer pass IVA. I found that out on Thursday by talking to their chap that has been taking cars through the IVA test - it just goes to show that you're always better off talking to someone with actual practical experience in matters of kit car construction.

Anyway, with only 4 days to go before the test a panic was on to get hold of some stick-on indicators that needed to be fitted to the cycle wings. And the wiring (in a protective sheath of course) sent all around the chassis to be connected to where the real side indicators were. They're a bit naff, but if they get me through the test...

Oh - and I had rubberised the washers (and slightly bent them to better fit the curvature of the wings too) on the mudguards. This is for cosmetic rather than IVA reasons, and I'm certainly happier with the result than I was.

Another problem that came to light in my chat with Westfield was that the position of the fuel tank had caused some concern. As it is slung behind the suspension, in the event of a rear-end accident it would be forced into the suspension bolts and possibly punctured.

I'm not sure whether this will pass the IVA test, but I've attempted to counter this problem in two ways. Firstly I've glued a double layer of rubber sheeting between the tank and the suspension (yes - the roll bar, boot box and harness fixings all had to come off - again).

And secondly, I've put bolt caps on the heads of the bolts.


Minor things were chalking the engine number and VIN for ease of reading, a bit of a clean & polish and that was it.

I've assembled a folder full of paperwork to take. Including the original copies of the invoices I had to send in with the application, the test appointment letter and insurance certificate (just in case I'm stopped for not having a license plate/road tax).

I found getting insurance was a little tricky. The short-term insurers didn't want to touch an unregistered vehicle with a barge-pole, so I purchased a years worth of insurance using the chassis number. Possibly not the most cost-effective way of doing it, but I can always shop around at my leisure later.

All that I've got to do is stuff a backpack with tools, bolt covers, rubber edging, foam tape. And lose all the butterflies...