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neal

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Everything posted by neal

  1. I once received my car back from a service with a reputable specialist with that very same mistake with the jubilee clips!
  2. Sounds like the engine is overboosting. The ECM is unable to control the boost pressure coming from the turbo. Normally if the boost pressure is higher than required, the ECM will increase the pulse width going to the boost bleed valve. This delivers a greater proportion of the manifold pressure to the wastegate causing it to open more. Likewise the reverse occurs if the boost pressure is lower than required. This feedback look is the primary mechanism by which the ECM controls the boost. There are secondary measures the ECM will take when overboosting occurs in an attempt to reduc
  3. One thing to be aware of if that with the standard ECM, you only get the full 11psi boost across the rev range in fifth gear. In the other gears the boost becomes progressively greater as you go up the gears, but is still only 6-8psi up to around 6k rpm. Only above 6k does it increase further, reaching 11psi as you hit the redline: bgraph.pdf (ignore the overboost curve, as far I know that only applies to the Lotus Red Race ECM) I'm starting to sound like a broken record but again this was done to protect the drivetrain, since the car's acceleration or more precisely the torque a
  4. Yeah, it is somewhat addictive running an overboosting V8! Really shows what it could have done had it not been for the limiting factor of the gearbox. The V8's MAP sensor only reads to 2 bar so you can't see what the max boost the T25s could produce. But I ran an OBDII trace and you could see from the slowing rate at which the boost was increasing that it would top out at approx. 2.2 bar. But the most surprising thing is just how instantaneous the boost comes on without the ECM to feed it in gently. Again this was primarily to protect the gearbox. But I'd imagine another factor was to
  5. Have a look for the bleed valve - it's about 5cm x 3cm, on the right side at the very back of the engine bay attached to the firewall. It will have a two wire electrical connection and a hose connected to the top and another connected to the bottom. First of all check the electrical connector is secure (but I'd be very surprised if that was the issue since if it's disconnected you immediately get a CEL). Next check the top hose (from the throttle body) is secure. Try connecting your mityvac gauge to this hose and rev the engine hard to see what sort of psi you're getting. Alternativ
  6. There are some major differences between the Renault and Lotus spec UN1 variants such as, stronger diff, heated treated shafts, difference gear ratios, etc. However, a lot of the basic components are identical and I believe this includes all the synchro rings. I managed to find my copy of the Renault service notes for the UN1: Unfortunately it only lists the Renault part numbers for the tools used to work with the box, not the actual gearbox components. But it gives full details of the Renault models fitted with these boxes. You could have a look through Autotrader, Ebay, Pistonhe
  7. The website is currently down, I hope he's still in business, but Kevin at GTO was the expert and supplier of all things UN1 GTO Racing Scarletts Farm Scarletts Lane Hare Hatch Twyford Berkshire RG10 9XE T: 01189 401101 F: 01189 401373 M: 07985 609231 www.gtoracing.co.uk/
  8. I went with a group of exotica to the IOM a few years back for a hoon around the TT. None of us had any problems with the ferry. My car had the the S350 front lip and was lowered so only had a few inches clearance at the front but was fine. The guys who run the ferries were well used to it - they must see a lot of serious machinery - and help you straddle the lips on the ramp at as shallow an angle an possible. Have fun!
  9. Happy birthday Mike! Have fun
  10. Very sad to hear. Brian's always gone out of his way to help at any time.
  11. Alas I can't make this so my ticket is up for sale Sunday is the best day of the event - in addition to the demonstation runs you'll be able to see all the full bore timed runs! Also includes a roving Grandstand ticket so you don't have to stand around all day or struggle to get a good view of the track. I've put it up on Ebay but fell free to PM me an offer: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330581522325
  12. Definitely worth seeing at the cinema but I can't wait for the DVD either. I read that the first cut of the film was over 5 hours. And unlike a lot of DVD extras, they left out some incredible stuff, e.g. the European GP at Donington.
  13. Yep, there were four V8s including an S350 at Vmax 10: http://www.vmax200.com/results-vmax10.htm As I recall, Adrian was deperately trying to get the wing off his S350 but to no avail
  14. Happy birthday your Bibsness Have a good one
  15. I was able to get some matching aftermarket condensers for £150 each. I think PNM and SJ Sportcars have them.
  16. Happy birthday I'm sure Bibs is at heart an old romantic and has something special planned
  17. Yeah, it would probably be less of a pain if the transaxle had just fallen off. At least then you know what needs replacing. The whole 'it might be this so we'll replace it and see what happens' scenario is the worst. I could end up replacing the coilpacks, leads, plugs, crank sensor, camshaft sensor, rough road sensor, wiring loom, ECM,... and still not get to the bottom of it. Yes, all I get is the tacho flipping to zero and a slight jolt. No warning lights, CELs, nothing. It's actually one of the annoying things about having a non-US ECM since a lot of the errors are disabled.
  18. My engine has started to develop the annoying habit of cutting out. It only happens intermittently (every ten minutes or so) and for a brief duration (literally a split second). Usually it just recovers by itself, otherwise a quick prod of the accelerator fixes it. I've had misfire problems in the past because of dodgy leads but I don't think this is the case now. The misfire caused a noticable stuttering acceleration which was especially bad at a particular rpm and throttle position. This time it's only a brief blip and can happen across the rev and throttle range. When the ignition
  19. The standard V8 front ARB is 16mm, the S350 is 17mm. I had the cambelts done at the factory a while back and asked them to also fit the S350 ARB at the same time. However, I didn't realise the S350 ARB-chassis bushes are PU. My bushes are black, PU is usually some bright colour (yellow, red, blue). I can't see how they could have reused the standard ARB rubber bushes due to the larger diameter. Did the factory say the the standard S350 ARB bushes are PU, or is it just SJ's aftermarket ones?
  20. Great night again this year, much appeciation to Laura and Bibs for organising everything! Fantastic turnout, really enjoyed catching up with old faces and meeting new ones (some from far, far, away). Thanks!
  21. If you remove the plugs are you planning to ground them? I've always read that it's a bad idea to fire an electronic ignition without grounded plugs. Not sure if it's because it could damage the ECM (which would be very expensive) or simply as a precaution against having random sparks shooting around. Alternatively just remove the fuse for the injectors, though as Mike says the engine will turn over a lot more slowly if the starter is fighting the compression. Also, only run the starter for short blasts, allowing it to cool down in between if necessary.
  22. With the Quaife LSD, you need to coat everything with silicone since the output shafts on the diff don't have a groove for the O-ring. When I was having mine fitted I explained this to my garage but they said that they do it anyway - apparently there had been a service bulletin from Lotus recommeding that procedure for all boxes.
  23. 1 & 2 Bibs & Laura 3 & 4 Tony & Patty 5 Yasuo 6 Kimbers 7 Mike6 8 & 9 Paul & Sarah 10 & 11 Sue & John 9 Christopher 10 & 11 Lord & Lady P (+ Beauty?) 12 & 13 Felix & Denise 14 & 15 Guy Allen (yes, the wonderful artist!) & Wife 15 & 16 Neal & one probable
  24. Just a short circle spanner (think it's 8mm), long fingers and patience!
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