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Mar 25, 2007 18:30:11 GMT
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Rather than just slinging a Jag IRS under there...
How can an early (1200 or 12/50) Heral rear end be upgraded to (a) handle reasonable well and (b) handle decent amounts of power?
Whats the trick? Something involving GT6 and TR6 bits at a guess?
Say you needed to be able to handle 175 - 200 BHP?
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Mar 25, 2007 18:41:08 GMT
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MK2 vitesse rear end is an upgrade for a herald, tho its a weak point on them anyway, but aparrently!! with a little amount of work you can use a scooby diff
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Last Edit: Mar 25, 2007 18:44:14 GMT by nutty66
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Mar 25, 2007 18:51:17 GMT
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i would start from scratch, sierra, jag, etc. GT6 mk1 has the same suspension as a herald, mk2 gt6 is unique but flawed. mk3 gt6 and spitfire 1500 has "swing spring" rear suspension, it looks the same as standard but the leaf spring rotates around a centre pivot on the top of the diff, this is supposed to be the best of the 3 triumph choices, but i doubt it will handle the power.
TR6 is very similar to sierra but probably heavier.
Paul
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Mar 25, 2007 19:16:26 GMT
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Cut it all out and use a Sierra, J or BMW IRS! Alternatively: ;D ;D
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Seth
South East
MorrisOxford TriumphMirald HillmanMinx BorgwardIsabellaCombi
Posts: 15,538
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Mar 25, 2007 19:21:53 GMT
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I don't think you'll get any small Triumph derived unit to take that much power for long... Unless you fit skinny crossplies that is
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Follow your dreams or you might as well be a vegetable.
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Mr K
Posted a lot
Posts: 2,993
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Mar 25, 2007 20:33:33 GMT
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Cut it all out and use a Sierra, J or BMW IRS! Alternatively: ;D ;D is that yours?
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Mar 25, 2007 21:39:09 GMT
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someone on here owned Quarter Pounder didn't they, was that rmad? I forget.
Anyone got a pic of the bare chassis?
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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With any Herald based rear suspension the axles are load bearing. So if swapping over diffs you have to bear in mind that the diff has high lateral forces trying to push the axle through it when cornering. The simplest conversion to the suspension is to fit either a late Mk3 GT6 or Mk4 Spitfire rear swing spring and front anti roll bar. These axles are also an inch longer so it widens your rear track, early Mk4 Spitfire have the standard width track. Canley Classics have all these parts. One option is to flag the independent rear end and fit a live rear axle. I have heard of several Vitesse being fitted with these, one off of a Fiat. Most modern cars are wider than a Herald so the rear suspension from them will also be wider.
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Vitesse 6 Saloon Vitesse Mk2 Convertible BMW R1150GS VW Amarok
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Simple answer- Don't.
The Herald rear is simply flawed. Its flaws make it fun to drive and a bit of a handful on a 1147cc car, downright scary on anything bigger. Put something else in if you must.
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"Jeremy Clarkson, a man we motor enthusiasts need on our side like Lewis Hamilton's F1 car needs a towing ball and a Sprite Musketeer" My motor
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someone on here owned Quarter Pounder didn't they, was that rmad? I forget. Anyone got a pic of the bare chassis? 'Twas I. The chassis was a pretty basic set-up, it had another chassis added to the original at the back! You can see the original outriggers in this shot. It's been a while since I've seen an original Herald from underneath, so I can't really make any further observations I'm afraid!
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anyone got a photo of a stock herald chassis?
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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paulw
Part of things
Posts: 217
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Mar 26, 2007 14:17:51 GMT
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Sory, couldn't dig up a decent picture, but... I thought a lot about this when I had my Spitfire and it was eating diffs, but I didn't actually do it. Inspired by the (brilliant) Caterham set-up, my conclusion was that a five-linked (or four and a Watts linkage) De Dion tube was by far the best route. Advantages: given the chassis has been designed for the diff to be mounted where it is, being able to shape a de Dion tube to go below or behind the diff would mean you could stay closer to the original design, which would mean less chopping and the trans tunnel could stay the same, as the prop wouldn't be going up and down like it would with a live axle. There are existing radius arm links on the chassis rail at the back of the floor, so you could probably reinforce these. You could use a Sierra diff without the side loading problems The geometry is far simpler to work out than an IRS as the wheels simply stay upright all the time. You could probably use off-the-shelf bits from the Locost kit car people as some of them have developed de dion set ups for those and they would be about the right width. Even if you only got hub carriers and brake stuff from them and made your own tube it would be easier. Disadvantages: Not exactly a five minute job, and you'd have to spend your time explaining to people what a De Dion rear is...
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Lotus Seven '58 Ford Special 64 Barracuda
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Seth
South East
MorrisOxford TriumphMirald HillmanMinx BorgwardIsabellaCombi
Posts: 15,538
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Mar 26, 2007 23:37:57 GMT
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anyone got a photo of a stock herald chassis? Can't find a good one on-line at the moment strangely. Here's a couple of the one I cut up recently. I'd already removed the rear extensions that hold up the boot floor in the first pic. Front end missing obviously.....
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Follow your dreams or you might as well be a vegetable.
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