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Glyn Harper

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  • Name
  • Car
    1988 Lotus Esprit Turbo, BMW M4 Coupe
  • Location
    Isle of Man

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  1. Well, Peter Stevens designed it, which is why a lot of things are common. Wing mirrors are the same Citroen CX that we use on the Esprit!
  2. I've had my Esprit 21 years now, and what is soul destroying is the jobs you remember doing 15 years ago and thinking 'good, I can forget about that now' only to be doing it again years later! I'm on about my 3rd set of gearbox and engine mounts now, for example. Luckily mine is garaged and rarely comes out, so most maintenance tasks these days are limited to things that stop working when they're not used. Like relays! I really should drive it more. Think I'll tax it for May actually.
  3. I have the later 100mm V8 style electronic speedo in mine which you can calibrate. I used a GPS speed sat nav for comparison and gradually changed the increments until I got my speedo spot on. Most speedos over read speed anyway by default, so even with bigger wheels and tyres, you may only be eating into that margin. But yes, worth checking with something like a TomTom on your dash that gives you a gps speed, just as a one off so you know how much to allow for. We don’t like permanent dashboard or window clutter in our nice Esprits.
  4. There was a horrible set on eBay last year that looked like they had been hand painted with some silver dulux using a paintbrush. Other than that, they come up very infrequently. I was quite lucky and happy when I got mine. Think I paid about £1000 as well, which was a bargain really. If you put a watch on eBay, you may get a set.. although they usually seem to come up in ones or two’s, not a full set. They are light though. I originally had GT3 wheels, which are smaller with narrower tyres. The much larger Magnesios were pretty much the same weight, wheels and tyres together.
  5. If these brackets could be made in aluminium, then I’d be happy to fit a set to my Esprit To prevent this damage happening in the first place. Some of our roads are quite bumpy here, so I imagine my chassis and body get a right good pasting. I’d rather prevent any of this cracking than try to fix it afterwards. making them out of aluminium would appeal for the weight factor, and also the corrosion factor. (If anodised). I wouldn’t fancy fitting mild steel under there as it’s right in the airflow and will quickly rot in the climate I live in. (Near the sea with crap weather most of the time!)
  6. You could always do what Ford used to do, and I believe a number of modern cars still do. Have an auxiliary air pump somewhere pumping air directly into the exhaust to thin out the emissions!
  7. I seem to remember when I first took the carbs off mine to switch to injection, the ram pipes (or whatever they're referred to as) were so long they left hardly any gap between the tops of them and the plenum chamber housing. I was surprised any air managed to get in at all before boost came in. On the injection plenum, as on the photo above, they are just a lip more than longer pipes. I guess injection doesn't benefit as much from having pipes as carbs do. This is way out of my league though when it comes to airflow and stuff.
  8. My air con was mostly missing when I got the car which is why it was an easy choice to use the radiator for the charge cooler. The pipes are indeed quite narrow, but they seem to be ok. I can monitor air temperature after the charge cooler, but I don't have a way to measure it going in. Certainly after a good run though when the engine is really hot, my charge cooler is always stone cold so it does the job. The throttle bodies are the standard SE ones, along with a standard fuel rail. When it was on the rolling road though, we did have to squash the fuel pressure regulator to up the fuel pressure a bit. I only use 4 injectors, but as I'm not using a Lotus ECU they are not the Lotus type of injectors. I'm pretty certain these are the 4 injectors I'm using. Rover Tomcat 220 2.0 Turbo 420 Fuel Injector Lucas 380cc MJY10023 They certainly look the same anyway, black with a red stripe. On the rolling road, the 301hp was made with decent fuelling though, as the lambda didn't lean out at any point so I'm quite happy they're up to the job. Here's my power run.
  9. It is a custom exhaust. The pipework uses the standard downpipe and then goes into a rear silencer that has very little baffles in it. I think the main pipework is standard, 2 1/2" I think. I think most of the power is made by the hybrid turbo as well as the ECU I am running with the different injectors. I only run 4 injectors, not 6. They are Rover 220 Turbo Coupe injectors, so 300bhp is about the limit for them. The car runs a little rough when it is cold (I need a better warm up map) but when it is warm, it runs really smooth and nice. No flat spots in the fuelling. I have checked as I can log my ECU. I have also reduced the weight of the car by over 100kg from standard by removing soundproofing, lighter seats, carbon sunroof, lighter bonnet, titanium and aluminium bolts, aluminium radiator.. etc.. so it is much better now because of that also. The only thing that spoils the car really is the gear change. I need to get it lined up properly as at the moment it is not great, although all the parts are new.
  10. I fitted a charge cooler to mine when it was originally on Carbs. It is doable, but a lot of the parts would be hard to source now I reckon, like the plenum pipe parts off a charge cooled car. I used my defunct air con rad for the charge cooler rad, and ran some custom alloy pipes from the back to the front in the gap between the chassis and the body. I use an electric water pump. There were a few other bits I needed to do, like make a reservoir for the charge cooler coolant and make up a few brackets and stuff, but overall it wasn't a massively difficult job. I did have to swap the inlet cam cover as well, as the oil filler is in the wrong place on a Carb turbo as it sits right under the charge cooler on an SE! I wouldn't like to tackle it now though due to lack of parts. I went on to remove the carbs and fit an Emerald M3D ecu and fuel injection, as well as a hybrid turbo. My car now makes 301bhp on a rolling road. Not bad considering it would have been specced at 215bhp when I bought it 21 years ago.
  11. Are you getting decent vacuum? If it's really noisy, it could be because the diaphragm in the pump has given up. Happened to mine and sounded like a load of quacking ducks.
  12. Is yours the wider one or the later narrower one? I’m not sure the reason they went narrower. It could be for regulations regarding body parts being wider than the car (could take pedestrians out) or for aerodynamic reasons. I know mine provides a lot of downforce as I get a bit of lightness at the front over 100mph which I don’t like.. and that’s with the narrower one. I imagine the wider one would provide significantly more downforce as there is more of the ends in clean air.
  13. Better Chargecooling is the proper way to do it. Water injection is an engineering equivalent of a workaround/bodge.
  14. Indeed.. I did say it was ages ago I heard that story. I certainly didn't have my water injecting before the turbo.
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