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JumpingFrog last won the day on May 1 2019

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  1. Are you sure you have a single-rail with a D-type? Such a combination shouldn't exist from the factory, even with aftermarket parks I've never heard of a single-rail mainshaft for a D-type overdrive. I think actually you mean 3-synchro and 4-synchro gearboxes? Both should be 3-rail (outward appearance is the same)? The 4-synchro is certainly no weaker than the 3-synchro, the straight cut first gear on the 3-synchro doesn't last indefinitely and the ones I've dismantled have been pretty badly worn. Unfortunately you can't just bolt an OD to a non-OD gearbox, you will also need to change the main shaft, 3-synchro and 4-synchro mainshafts are different.
  2. I don't know about using MT-90 in a diff. Red line's website specifically says not to use it in diffs... But also MT-90 is GL-4 which is an EP rating, so I don't really see a technical reason why not. Might be worth asking Red Line, from a quick google it sounds like all Red Line products are yellow metal safe. I admit this is a bit of a minefield...
  3. The original oil Triumph recommended for gearbox/differential is Castrol EP90, you can still buy this. But oil technology has moved on in 50+ years. So, I'm with Roger on this. The differential oil in particular is often neglected and a pain if it hasn't been modified with a drain plug. A typical differential is ~95% efficient, which means the other 5% is going to heat, there's not so much air flow where it is, tucked up over the exhaust between the chassis legs... They do get quite hot. But I believe most of the Triumph differentials have copper washers under the sun and planet gears so it's also necessary to make sure whatever oil you use is yellow metal safe.
  4. Hi Roger, Slightly OT: But exactly which Red line product did you use in your differential? Maybe this one? https://www.opieoils.co.uk/p-1023-red-line-heavy-shockproof-gear-oil-75w-140.aspx?VariantID=1260 Personally I've only used one of Red line's products before, but I was impressed with it - their CV-2 grease, very good for wheel bearings.
  5. The different lengths before the first bend, 1200, 12/50 and 13/60 exhausts are all different. I think you have two 1200 exhausts (the longer ones) and one 12/50 exhaust (shorter)? In general I agree about the dimensions being not true to the originals. I had one stainless 13/60 exhaust (I can't remember who made it) that didn't line up with the silencer hanger at all until a 10cm section was cut out of it.
  6. Canley's is where I got mine from, the price is okay for a niche low volume part. As far as I know, the rationale for remaking them is that the supply of original adaptors dried up sometime ago. But maybe some specialists have some stashed away. This is correct you can use 313085 for both J-Type and D-type overdrives, but 305137 will only fit a D-type overdrive. Nick Jones confirmed this for me a while ago. The J-type adaptor has a bigger void on the OD side to clear the pump cam IIRC.
  7. David Manners sell "Woodhead" - https://www.abingdonmgparts.co.uk/product/shock-absorber-rear%3a--herald%2c-vitesse%2c-spitfire%2c-gt6/gsa385woodhead I suspect like Monroe, this won't be the same as the Woodhead of old. Not a recommendation, as I've still not fitted the pair I have (designated as spares), just another option. Although they are all metal construction unlike the unbranded ones. If you want Konis, cheapest way to get them is from Bastuck in Germany (around £80ea + P&P, so still not cheap), they would be my preference as I've not managed to kill mine...
  8. Wishbones, shock absorber, ball joints and trunnions are the same, nothing else is quite the same. Also spring from a GT6 will be stiffer and won't suit a Spitfire. It's a popular upgrade to fit GT6 uprights and brakes onto a Spitfire as the brakes are bigger (Girling Type 16) and the wheel bearings are beefier. You can't use Type 14s on GT6 uprights as the spacing on the upright is different and the disc is thicker.
  9. I know that Canley's definitely isn't the same as Bastuck, and as Ian says Rimmers could come from either Bastuck or Canley's. I don't believe the alloy used is the issue, but instead the porosity is due to problems in the casting process. Worth reading this: http://www.wbclassics.com/content/water-pump-housing-aluminum-triumph-gt6-tr250-tr6
  10. It's hard to put a price on it Colin, it's always going to be worth more in parts and we knew that when we built it. It's a small portion of what it cost to put together (much less than 50%) and we feel that it represents good value for a solid estate that would make a great 10CR or RBRR car with some TLC. Ideally we want to see it stay in one piece, it's certainly not rotten beyond repair like most 1200 estate projects I've seen recently. Selling you the interior would be committing to breaking it, which I'm sure you'd agree would be a shame for a complete car. It's a shame we can't keep it, but once the pandemic restrictions are finally lifted I'm moving abroad and storing my other Herald is already proving non-trivial. My co-conspirator Mike is in a similar predicament. Thanks for posting it up here Paul, I'm happy to answer any questions or supply pictures. -David
  11. I'm with Pete on this, ignore the factory dimension, the flange will drive the trunnion assembly to where it needs to be. A while ago I was talking to a retired mechanic who did his fair share of these. He told me he hated the job (mostly due to the taper fit), but also he struggled to position the housing correctly (he used to mark the shafts before disassembly). He had a eureka moment when I explained doing it the way Pete says. Picture of one of my old driveshafts (since scrapped), you can see the marks where the bearing has been, looks like your housing definitely needs to go further (which would agree with the gap on the inner flinger). I'm not convinced all the threaded sections are the same length either, I've seen some longer and some shorter. The way you're measuring is going to cause a discrepancy as you're following the taper rather than staying parallel with the shaft. P.s. the other gotcha with these is the inner seal, these are fitted "backwards" such that grease can escape but water can't get in. Oh and don't forget the outer flinger which keeps grease from the brakes.
  12. Is it leaking or overflowing? 4 years is definitely enough time for the rubber o-ring that seals the jet holder to the float bowl to go hard. Very common place for leaks.
  13. My only guess is it's due to the Spitfire (pre Mk.IV) having cam bearings? All Herald and later Spitfire (Mk.IV) engines have the cam running directly in the block.
  14. FWIW County pistons are actually quite good by most accounts, consistent weights and consistent sizes in my sets. The rings packs they're supplied with are okay too, made by a major manufacturer (Grant). Probably 4-ring pistons are a hang over from when the SC engine first appeared @ 803cc in the Standard Eight, I'm pretty sure even the 948 only ever had 3-rings. Can someone shed some light on the reason for standard size replacement sets to exist? I was under the impression that bores should be bored to the size of *each* piston to get correct clearances, and with factory pistons coming in multiple grades, it seems odd to me that you'd be able to just replace these and maintain correct clearances?
  15. I think there's only really one company supplying valves off the shelf now, which will be County/XRN, I don't think they do any actual manufacturing. AFAIK they supply everyone be it Canley's, Paddocks or Rimmers... Maybe Moss/TriumphTune ones will be different. However, there are other companies like G&S valves who are well regarded and will make you custom valves, no idea on the cost and you'd have to provide the profile and specs you want (maybe they would advise and copy a sample valve?)... Also no idea about minimum quantities... Probably more information than you ever wanted to know about valve materials: http://www.gsvalves.co.uk/assets/g-s-technical-infomation.pdf Edit: Old topic on Triumph-Exp, good read containing comments from a certain marmite Triumph Tuning guru: https://www.triumphexp.com/forum/spitfire-and-gt6-forum.8/hardened-valves.949405/
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