Escadrille Ecosse Posted January 2, 2022 Share Posted January 2, 2022 That looks quite fabulous Nick. Seriously impressive. Link to comment Share on other sites More sharing options...
rogerguzzi Posted January 2, 2022 Share Posted January 2, 2022 Hello Nick Are you not having an air idle valve? If not how does that work on a cold engine when you need rich setting and faster tick over? Roger Link to comment Share on other sites More sharing options...
Nick Jones Posted January 2, 2022 Author Share Posted January 2, 2022 9 hours ago, rogerguzzi said: That sounds a good starting point but i still think you will need to tweek then when running! I think you are right. There are separate air bypass screws for fine tuning at idle. Of course, having flipped the direction of operation, the vacuum ports provided by BMW to connect test gauges will no longer function for that purpose…… so going to probably need a flow meter, which look disappointingly pricey…. We’ll see. Maybe I can get a clockwork 600rpm idle by ear (not bleedin’ likely with 300deg cam!!) 6 hours ago, GT6MK3 said: Nice work Nick. I take it this is going in the Vitesse? Thanks. Yes. Initially anyway. The possible sub-plot is that it looks as though I’m going to have to revisit the GT6 engine, and as I have a couple of 2.5 cranks lying on the garage floor…… it might be rude not to gain 500cc. I also have an R160 diff in 3.54 viscous lsd flavour, one of Steve’s fitting kits and an itch in my brain that thinks a mild(ish) tune 2.5 in the Vitesse with the original injection, in combination with this diff would produce a champion mile-eater. This would mean that the yowling monster currently in the Vitesse would go to live in the GT6, which would mean injection and all that entails…. Putting the R160 in the GT6, in combination with the MX5 box means a ridiculously short propshaft and some unreasonable angles….. No final decision made. I don’t feel like spending lots of money on IC engines and mpg is going to matter…. Link to comment Share on other sites More sharing options...
Nick Jones Posted January 2, 2022 Author Share Posted January 2, 2022 48 minutes ago, Escadrille Ecosse said: That looks quite fabulous Nick. Thanks. It’s going to look less pretty draped with the wholly necessary wiring harness…. 9 minutes ago, rogerguzzi said: Are you not having an air idle valve? Ah. Well spotted. Again some options in play. The TBs have linkage for idle speed increase. Manual in this version but could possibly be operated by a PWM solenoid. That’s plan A. Plan B involves a T in my vacuum manifold and an extra air valve. Probably the thermoelectric one I’ve been using. For now, I’m curious how big an issue this is. It warms up very fast….. Link to comment Share on other sites More sharing options...
Mark Posted January 2, 2022 Share Posted January 2, 2022 Looking good Nick. Please put a video up when it's running, going to sound great Link to comment Share on other sites More sharing options...
Nick Jones Posted January 2, 2022 Author Share Posted January 2, 2022 Well, some way from finished but it runs. Surprisingly well considering all I’ve done is changed the fuel value due to bigger injectors (not needed, what I had) and set the throttle pot. It’ll idle flat at sub 500rpm and the noise is completely altered at both ends (was expecting the front to sound different). Sounds proper fierce at the front end. It’s very rich as the MAP is offset upwards. I’ve not attempted to drive it as no air filters, dark, raining and Tuner Studio wasn’t playing ball. But I reckon it would drive. I do have video evidence, but it’s on my iPhone and thus hard to transfer to my PC….. Maybe I can get it to YouTube direct… 1 Link to comment Share on other sites More sharing options...
Nick Jones Posted January 2, 2022 Author Share Posted January 2, 2022 After much teaching of new tricks to (rather dim) old dogs 1 Link to comment Share on other sites More sharing options...
Mark Posted January 2, 2022 Share Posted January 2, 2022 Result! Sounds great. Thought it would Link to comment Share on other sites More sharing options...
Escadrille Ecosse Posted January 3, 2022 Share Posted January 3, 2022 Blimey you were not hanging about with getting that to the pointy end. Impressive. And superb result too for straight out the box. I was curious about how you would get on with starting idle as I also suspected you might get away without idle air valve and rely on ignition timing to keep the thing alive while warming up. Link to comment Share on other sites More sharing options...
Nick Jones Posted January 3, 2022 Author Share Posted January 3, 2022 21 minutes ago, Escadrille Ecosse said: rely on ignition timing to keep the thing alive while warming up. Interesting you should say that. Current firmware doesn’t have that ability, but as it looks like the very aged firmware is what is upsetting Tuner Studio (dunno why, it’s been fine for years), maybe I have to bite the bullet and upgrade. Then I will have that facility. Bit reluctant as it’s been completely stable and bug-free, which is more than could be said for the much later, more feature-rich version I used with the PI. Need to crack on and get it to a driveable state as I’m very curious to discover if it’s worth the effort! Link to comment Share on other sites More sharing options...
RichardB Posted January 3, 2022 Share Posted January 3, 2022 Sounds terrific, well done Nick Link to comment Share on other sites More sharing options...
Gt64fun Posted January 3, 2022 Share Posted January 3, 2022 'Chuffing eck' Nick, you don't hang about! Sounds really responsive. What thoughts for air filter? Ian Link to comment Share on other sites More sharing options...
Nick Jones Posted January 3, 2022 Author Share Posted January 3, 2022 9 hours ago, Gt64fun said: 'Chuffing eck' Nick, you don't hang about! Except I started this in summer 2017…. Holy crap……. I’m committed now though. Airbox is started and the ram pipes have lost some length 1 Link to comment Share on other sites More sharing options...
GT6MK3 Posted January 4, 2022 Share Posted January 4, 2022 Sounds awesome Nick. It'll be a challenge to fit all that under a GT6 hood. Is that a TPS hung on the front end? Link to comment Share on other sites More sharing options...
Nick Jones Posted January 4, 2022 Author Share Posted January 4, 2022 13 minutes ago, GT6MK3 said: Is that a TPS hung on the front end? Yep, TPS at the front. On a GT6 I think it could be at the rear (as BMW intended) as there’s more bulkhead clearance. As it is, I’m going to have to turn the bulkhead lip on the Vitesse to miss the airbox as apparently I can’t read a ruler….. it misses, but only by a fag paper. As regards GT6 fitting, it is all pretty low. Lower, and further back, than my single TB set-up. Front of the fuel rail would be the potential contact point. I’ve laid the injectors back further this time (35 deg) which helps a little. Still using EV6, full-length injectors. Could go shorter without major difficulty. Whether that is enough to miss a GT6 Mk3 bonnet…. I’m not sure. There would be various other hurdles to jump when injecting the GT too. Link to comment Share on other sites More sharing options...
GT6MK3 Posted January 4, 2022 Share Posted January 4, 2022 There's some stuff in my GT6 thread that might be worth digging up if you do. Particularly the 0280156080 injectors from the 3.2L Vauxhall Vectra, that gave me the smidgeon of clearance I needed, while still being EV6 and (resonably) lowish flow. I'm not sure my GT6 will have the bulkhead clearance - I seem to remember when I made the plenum's for it and the 6fire the bulkhead clearance was awfully tight. Found lots of room at the front with angled pipes. Link to comment Share on other sites More sharing options...
Nick Jones Posted January 4, 2022 Author Share Posted January 4, 2022 Yes, will look back at your thread(s), as you are the expert on this! Was it the round tail you really struggled with with its smaller bonnet bulge? Or both? I could physically try it on the GT6 when I start pulling that apart. It’ll come off the Vitesse in minutes, it’s the carbs that are awkward. Link to comment Share on other sites More sharing options...
RedRooster Posted January 4, 2022 Share Posted January 4, 2022 Curious to hear what it sounds like with filters on and the other end too. Link to comment Share on other sites More sharing options...
Nick Jones Posted January 13, 2022 Author Share Posted January 13, 2022 Been working on the airbox…. As mentioned, clearance stuff the rear was minimal So got the hammer out again The bulkhead got a minor massage too. Then hammer forming the box part Couldn’t manage the full depth of the curve, so let a bit in It too had to have a flat in it to miss the clutch gubbins Sort-of fits the backplate….. I'll stich them together and seal with PU sealant when I've figured out the front end 2 Link to comment Share on other sites More sharing options...
Nick Jones Posted January 13, 2022 Author Share Posted January 13, 2022 Front end was a bit of a challenge. How to blend a tube to a rectangle with just the right amount of tip down and in. Not least because the Royal Mail camel got sick and I had to use a “stunt double” air filter for the design process...... It's a strut gaiter for a C4 A6. tacked…. Then I remembered I needed a new heat shield Stub welded in before permanently uniting the two parts As of this afternoon it’s “finished”, apart from PU sealant around the majority of the joint and some paint. That might have to wait. It’s not got above 3ºC in the garage and I had to resort to the hot air gun to dry the etch primer! Nearly time to go mapping - except they’ve been dumping salt on the roads….. last pic shows the inlet air temperature sensor. It’s a bit snug… 2 Link to comment Share on other sites More sharing options...
Martin Posted January 13, 2022 Share Posted January 13, 2022 whow And envious, as I do not have the chance to get such a project road Legal. Link to comment Share on other sites More sharing options...
Escadrille Ecosse Posted January 13, 2022 Share Posted January 13, 2022 Excellent work there Link to comment Share on other sites More sharing options...
Mark Posted January 14, 2022 Share Posted January 14, 2022 Nice bit of fabrication. Looks great. Link to comment Share on other sites More sharing options...
thebrookster Posted January 22, 2022 Share Posted January 22, 2022 Nick, Just been perusing this thread again, you said at the start you bought 3 sets of bodies. Also you mention later that each body is individual, but can be joined to extend. What I can't quite make out, do you need three sets of bodies to make up a 6 pot set? Or could you do it with two sets on the basis of one each of the end bodies, plus four in the middle? Muchos gracias!! Phil Link to comment Share on other sites More sharing options...
Nick Jones Posted January 22, 2022 Author Share Posted January 22, 2022 You can do it with two complete sets Phil. At least you can with the K1100 ones. There are several model variants that look similar but have detail differences. I had 3 sets because one purchase was a job lot containing a full set and a part set that was in fact a full set apart from no throttle pot and one link arm missing. In fact there is a full set left that Chris has blagged for….. something…. You couldn’t make 2 sets of six from three sets of 4. Not easily anyway. Link to comment Share on other sites More sharing options...
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