GT6MK3 Posted July 29, 2020 Share Posted July 29, 2020 Ouch! Link to comment Share on other sites More sharing options...
thebrookster Posted July 29, 2020 Share Posted July 29, 2020 Any thoughts as to cause, or simply a suggestion to ease off the right foot slightly?? Phil Link to comment Share on other sites More sharing options...
Nick Jones Posted July 29, 2020 Author Share Posted July 29, 2020 Those who have done the RBRR may recall the Badgers Holt stop and the big hill immediately after it. Apparently they were stuck behind a motor home there and had to flog up it in first gear on a warm day. It didn’t overheat but did get fairly warm as the fan switches in a little late....... The misfire we’ve been chasing may also be relevant as it feels like a lack of fuel and occurs at fairly high load. It’s not the map as most of the time it’s fine. Fuel pressure regulator possibly...... It’s been resisting diagnosis by being intermittent. Possibly both factors contributed, possibly there are others...... Head and block surfaces seem ok. Link to comment Share on other sites More sharing options...
John I Posted July 29, 2020 Share Posted July 29, 2020 (edited) Oh bugger. Good that Chris was so close to home when he made executive decision. Edited July 29, 2020 by John I Bloody auto text Link to comment Share on other sites More sharing options...
Mark Posted July 29, 2020 Share Posted July 29, 2020 Thats a pain. Melted a Spit piston once, just had the twin 40s tuned?. Institanious, no warning. Looks like the opposite side of the gasket was getting hot. Pleased the engine is otherwise unscathed. Link to comment Share on other sites More sharing options...
PeteStupps Posted July 29, 2020 Share Posted July 29, 2020 Downer. Is it a recessed block, out of interest? Have seen a few reports of HGF with Payen recessed block gaskets. Link to comment Share on other sites More sharing options...
Nick Jones Posted July 29, 2020 Author Share Posted July 29, 2020 Payen but flat block. There is definitely a problem with Payen gaskets for recessed blocks on the 6s and like you I suspect on the 4s also. Not in this case though. I think detonation... Link to comment Share on other sites More sharing options...
BiTurbo228 Posted July 29, 2020 Share Posted July 29, 2020 Oof. Glad it's just the headgasket and not anything more serious (that you've found! ) Link to comment Share on other sites More sharing options...
Escadrille Ecosse Posted August 4, 2020 Share Posted August 4, 2020 That's pretty definitive. Not good. Hopefully it didn't have a chance to burn the top of the block Link to comment Share on other sites More sharing options...
Nick Jones Posted August 4, 2020 Author Share Posted August 4, 2020 Back together tonight and fired up first pull. Sounds happy enough. Ran it until the fan cut in. Probably re-torque the head at the weekend when it’s done a few heat cycles..... Fuel pressure regulator also swapped in the hope that the random misfire might go away. 1 Link to comment Share on other sites More sharing options...
BiTurbo228 Posted August 5, 2020 Share Posted August 5, 2020 Glad everything seems to have gone back together ok. Fingers crossed the cause is rectified whatever it was. Link to comment Share on other sites More sharing options...
Nick Jones Posted August 18, 2020 Author Share Posted August 18, 2020 Retorqued the head and reset the tappets. Unusually I did seem to get significant extra compression of the gasket - certainly enough to change the tappet settings. Anyhow, it's running ok mostly, although the misfire hasn't gone away. Wasn't the fuel pressure regulator then. We have another set of injectors to try (though I'm not that optimistic) though need a bit of time to do that as the "new" ones have a lower flow rate (which is good, the existing ones are quite-a-bit big). In theory, amending the required fuel setting in MS with the new injector numbers should sort it, but when I've played the game before on other cars a degree of remapping has been needed. Thing is, Sir has gone and got a job (good thing, especially in these times!) and it's not very local, so the car has suddenly become a critical component and needs to work..... Link to comment Share on other sites More sharing options...
BiTurbo228 Posted August 19, 2020 Share Posted August 19, 2020 Ah tricky :S I've found a multiple car situation is required to make sure there's always something available when you do your own maintenance (although it could be something to do with my choice in cars...). You could test the injector theory by swapping them around the cylinders and seeing if the problem follows them. Same with plugs/leads etc. Link to comment Share on other sites More sharing options...
Escadrille Ecosse Posted August 19, 2020 Share Posted August 19, 2020 Hearty congratulations on the job. A good thing indeed in these difficult times for the young 'uns Link to comment Share on other sites More sharing options...
Nick Jones Posted August 22, 2020 Author Share Posted August 22, 2020 It's not like we really need another major project (though it seems like one of doesn't really see it as a major project..... something wrong with his calibration!!), but I'll just leave this here..... All-alloy engine with RWD 5 speed gearbox (a matching couple). Happened to come into stock at my favourite scrapyard at a fair price...... Looks like it might well fit without massive aggro, though inevitably there are one or two hurdles. Link to comment Share on other sites More sharing options...
Sidescreen Ben Posted August 22, 2020 Share Posted August 22, 2020 You really are a glutton for punishment Nick! Link to comment Share on other sites More sharing options...
Nick Jones Posted August 23, 2020 Author Share Posted August 23, 2020 Not me your honour ..... it’s him...... something wrong with his upbringing..... Oh, wait...... Link to comment Share on other sites More sharing options...
Sidescreen Ben Posted August 23, 2020 Share Posted August 23, 2020 Precisely! And congratulations Chris, on your degree. Clearly torturing Vitesse chassis’s has paid off Link to comment Share on other sites More sharing options...
JohnD Posted August 23, 2020 Share Posted August 23, 2020 Well done to Chris! Getting a job in the present climate can only be down to excellence. As for the new aquisition, "exploded diagram" seems to fit well! Link to comment Share on other sites More sharing options...
Escadrille Ecosse Posted August 23, 2020 Share Posted August 23, 2020 What's it from? An MX5? Link to comment Share on other sites More sharing options...
Nick Jones Posted August 23, 2020 Author Share Posted August 23, 2020 3 hours ago, Escadrille Ecosse said: What's it from? An MX5? Nope..... something rather less sporty. As a 1300 (which is what we have here) it makes 84 bhp, though I reckon it wouldn’t take much to pick up a few more (exhaust manifold is plain nasty for example). However there are also 1500, 1600 and 1800 versions, some with vvt, giving 105 to 130 bhp. Our ultimate goal is around 100 - 110 horses with decent torque spread and efficiency, but keeping it light to retain the “essence of Spitfire”. Yes, I’m being deliberately vague about the donor..... but only as a gentle wind-up to get you all thinking 1 Link to comment Share on other sites More sharing options...
Escadrille Ecosse Posted August 23, 2020 Share Posted August 23, 2020 OK, challenge accepted Link to comment Share on other sites More sharing options...
daisymoose Posted August 23, 2020 Share Posted August 23, 2020 ??????? Suzuki Jimmy ???????? Looks like it should live there quite nicely Dave Link to comment Share on other sites More sharing options...
BiTurbo228 Posted August 24, 2020 Share Posted August 24, 2020 All alloy? Toyota ZZ? Something I don't recognise at any rate... Link to comment Share on other sites More sharing options...
Nick Jones Posted August 24, 2020 Author Share Posted August 24, 2020 Dave has got it.... well done Mr Moose Link to comment Share on other sites More sharing options...
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