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16 Dec 2010, 09:25 (Ref:2805050) | #326 | |
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16 Dec 2010, 13:22 (Ref:2805141) | #327 | ||
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Insurance job's ?
I meant in order for them to be sold Sam,not 'torch em! |
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Living the dream,Chief instruktor and racing on the worlds best circuits-The Nordschleife and Spa.Getting to drive the worlds best cars-someone has to do it, so glad its me. |
16 Dec 2010, 14:58 (Ref:2805165) | #328 | ||
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Double post, sorry
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Born in the Midlands, made in the Royal Navy |
16 Dec 2010, 14:59 (Ref:2805167) | #329 | ||
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Porsche 924 Engine Mods
We talked earlier in this thread about the use of 924s for the 360 6 hour race. Some are clearly being prepped for the race from scratch & others may be sourced from the existing 924 series but it is clear that the 924 engine is not too capable of much outright power. That's OK in a one make series or for the 360 where reliability is more important but one or two people may want to investigate a few more ponies. This comes from the 924 series web site, where it has been suggested that a 924 Turbo head on the n/a block may help the engine breath better: "The head on the 924 is extremely restrictive and that is where the problem lies. The turbo head has a combustion chamber whereas the normally aspirated head doesnt. Both pistons have combustion chambers, the turbo head has the combustion chamber to lower the compression ratio. The theory goes that you can use Golf pistons and rods which utilise a flat (ish) topped piston with the turbo head. There is nothing to stop you using carburettors, or for example a megasquirt with this - but the head is still the weak point, especially the hump in the intake port where the water jacket runs. Achillies heel two is the valve seats, which are shrunk into the head. Larger ones would be required for bigger valves to be fitted. The valves aren't bad but are very thick and carry lots of weight as well as having a thick stem. Added to this, the valve guides are of good material, but impinge on the inlet port. New bullet nose guides would probably provide a useful increase in flow. If you add a decent bottom end, with everything lightened, and dry sump it, you would end up with a half decent 924 engine - but - again - in comparison to other 2 litre engines, you may struggle for outright horsepower. The standard exhaust manifold is very heavy and doesn't flow - best weighed in for scrap! I have no proof, but I suspect a good tubular 4 into 2 into 1 would prove beneficial. However, Ford engines of the same heron head type can work well with a 4 into 1. 4,2,1 for torque, 4 to 1 for outright power". Might just be easier to stick with the 924 series Piper cam & live without the hassle & expense, though, I suppose! |
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16 Dec 2010, 15:34 (Ref:2805175) | #330 | |||
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There are more subtle mods to the 924 series engines (as am finding out) than just cam and pulley, but at the end of the day am sticking to what have got and try and make it ultra reliable......... |
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16 Dec 2010, 18:57 (Ref:2805261) | #331 | ||
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Update on the 6hr 924 progress. The original idea with this car was to run it as it was, but by the time I have finished the only subassembly of it not removed and rebuilt will be the rear suspension. Found today that in order to get full throttle previously a cable tie was put round the bulkhead end of outer cable where it went through to take up slack. Now has better bracket other end that allows more adjustment and no cable tie...
Now waiting for local sparkies to finish rebuilding alternators (spare as well) and then can modify mounting arrangement to get balance hopefully between absorbing vibration and flapping about enough to throw belt off! Sadly will still be 'underneath' and close to exhaust manifold but can't do much about that. I see 924 Turbo has Alt mounted high but inlet arrangement allows room that n/a model doesn't! All new wiring works as intended so looking forward to being able to put some fuel and oil in and firing it up |
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16 Dec 2010, 19:18 (Ref:2805268) | #332 | |
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16 Dec 2010, 19:24 (Ref:2805277) | #333 | ||
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16 Dec 2010, 19:31 (Ref:2805282) | #334 | |
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quite, from the Haynes crossflow engine book
'if its jangly, its properly run in, thrash it hard, if it rattles, carry on, it'll do another 20 000 miles . . . . if its really clanky, just accelerate a little slower until you get to 5000rpm, it'll be fine for another 20 000 miles. if its really quiet and smooth, expect something major to happen any second!!! |
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16 Dec 2010, 19:44 (Ref:2805290) | #335 | ||
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I can't find it again now - picture size is a bit demanding in my old eyes - but I thought I saw a bolt head - or perhaps a nut - that you had only half polished. If I spot it again I'll make a note of it .... ".... to run it as it was ...." Yeah, right. |
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16 Dec 2010, 20:14 (Ref:2805301) | #336 | |||
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It ain't that pretty when you get close, but considering had been standing outside a while before I bought it has cleaned up OK. The pics are small on purpose so's not to give too many secrets away to all the other 924 builders |
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16 Dec 2010, 23:06 (Ref:2805370) | #337 | ||
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Hey Mike don't worry Ive had a couple of beers and can't see that straight anyway. Is that a bottle of Tango?
Last edited by midgetman; 16 Dec 2010 at 23:07. Reason: Stupid iPad auto spelling |
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Midgetman - known as Max Tyler to the world. MaxAttaq! |
17 Dec 2010, 05:44 (Ref:2805443) | #338 | |||
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Car is more than a bit orange but camera flash seems to make it worse! Have a plan to tone bodywork down a bit when done. (Will also hide some of the ripples and scuffs ) Don't know what goes on in that Porsche championship but have seen rally cars with less floor pan damage |
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17 Dec 2010, 10:55 (Ref:2805520) | #339 | ||
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Its a real pity that Porsche chose to base the engine for the 924 on the LT Van engine rather than taking the engine from the Golf GTi. Oh well, too late now!
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17 Dec 2010, 12:27 (Ref:2805563) | #340 | |||
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The Le Mans 924 Carrera GTS / GTR things produced well over 300bhp and lasted the 24 hours so it is possible to get the engine to deliver the goods- at a price! |
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17 Dec 2010, 12:47 (Ref:2805573) | #341 | ||
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My stepson ran in the Hankook 924 challenge way back in the mid-90s - it was supposed to be a "budget" series, and as he was a junior lieutenant in the Army at the time his disposable income wasn't that great, so we approached it in that light.....when he ran a big-end bearing in practice at the away round at Zolder, I sourced a replacement engine from one of my fellow scrappies from a wrecked 924 and dropped it in as was, got him out for the next round at Donington IIRC - when chatting about what we'd done, one of the more "precious" racers rather sniffily remarked that if he'd had to do that he just wouldn't contemplate racing.......he didn't seem too impressed when I told him that it seemed good enough to me for the LT Van coupe challenge..... - and that I'd sourced another spare now from an LT - did it matter if it was a diesel?
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Richard Murtha: You don't stop racing because you are too old, you get old when you stop racing! But its looking increasingly likely that I've stopped.....have to go back to rallying ;) |
17 Dec 2010, 13:01 (Ref:2805578) | #342 | ||
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Its a pity Leyland decided to develop a pig v8 from a Dolomite engine instead of using the already in production Rover V8, they do some strange things car manufacturers!
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You can't polish a turd but you sure can sprinkle it with glitter! |
17 Dec 2010, 13:24 (Ref:2805592) | #343 | ||
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I've decided to stop reaching out to people. I'm just going to contact them instead. |
17 Dec 2010, 21:54 (Ref:2805781) | #344 | ||
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Didnt they just, what a superb car the Stag would have been if originally fitted with the Rover Buick engine.
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You can't polish a turd but you sure can sprinkle it with glitter! |
18 Dec 2010, 11:08 (Ref:2805920) | #345 | ||
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Getting ahead of myself but driving back from workshop this morning in the snow and i was off day dreaming that may be i could turn the Escort into a rally car for some Historic events in the winter.WDYT.
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18 Dec 2010, 12:14 (Ref:2805947) | #346 | ||
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The reason Kerbside Racing hasn't confirmed its entry in to the 6 hours yet:
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18 Dec 2010, 12:23 (Ref:2805954) | #347 | ||
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I nearly bought one brand newly converted Mk1 a few months ago that was turn key ready to rally with mostley all new components but as thats not what I am into I never bothered in the end. It was under 5k though and would have cost well in excess of double maybe treble to prepared it to the standard, I am sorry in a way I never went ahead although I did leave an offer he never got back.
Blimey Max dont you have a workshop, I used to work like that till I moved here and custom built a big un! Thinking of converting into a bunglow and cutting and running now though! |
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18 Dec 2010, 12:23 (Ref:2805955) | #348 | ||
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18 Dec 2010, 12:28 (Ref:2805959) | #349 | |||
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Going to play with seat brackets this afternoon as don't have to lie on floor to do that! |
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18 Dec 2010, 12:38 (Ref:2805964) | #350 | ||
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Well I failed to get up the drive this morning so there's not a lot of hope of getting to Spain for Christmas !
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Balls of steel (knob of butter) They're Asking For Larkins. ( Proper beer) not you're Eurofizz crap. Hace más calor en España. Me han conocido a hablar un montón cojones! Send any cheques and cash to PO box 1 Lagos Nigeria Africa ! |
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