Another Vulcan thread

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oddbob22

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I've just acquired a Vulcan KS, which needs some tlc.

I'm curious about the spring spec on them, as I also have a Brummy made Stingray. Inside, they're identical, apart from the spring. According to the Titan fitting list, the Stingray takes a number 7, and the Vulcan a number 8. The only difference between a 7 and an 8 is the length/number of coils, the Vulcan takes the longer spring.

My guess is the old PTFE seal wasn't as efficient as the later parachute type seals fitted to the later Vulcans and Stingrays, so Webley used a shorter spring, which wasn't reflected in the Titan list?
 
oddbob22 said:
I've just acquired a Vulcan KS, which needs some tlc.

I'm curious about the spring spec on them, as I also have a Brummy made Stingray. Inside, they're identical, apart from the spring. According to the Titan fitting list, the Stingray takes a number 7, and the Vulcan a number 8. The only difference between a 7 and an 8 is the length/number of coils, the Vulcan takes the longer spring.

My guess is the old PTFE seal wasn't as efficient as the later parachute type seals fitted to the later Vulcans and Stingrays, so Webley used a shorter spring, which wasn't reflected in the Titan list?
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Its a few years now. My mark 1 vulcan seal failed I got a new seal and spring a titan xs no8 and a green seal. The guide was a slack fit for the titan spri g i turned a tighter fitting guide up myself in stainless. It was over power and i cut and ground the spring. Iir 3 coils. It was 11.2 and it settled down lovely and is ery consistant. Still flawless today.
I might be tempted to try the 7 as i know i had to shorten my 8. So could be the 8 is for general world market. A d 7 uk sub 12. I have no idea. But if they are the same as you sujest. I would go 7. Not sure of the seal sorry was a green one a mid to dark green. Good luck
 
The original spring in my MKII Vulcan .22 was 243mm in length, 13.6 ID, 3.3 wire and 33 coils. It shoots at around 11.3ftlb with 14.9gr pellets. How does that compare to your KS and/or the Titans?
 
CTD said:
The original spring in my MKII Vulcan .22 was 243mm in length, 13.6 ID, 3.3 wire and 33 coils. It shoots at around 11.3ftlb with 14.9gr pellets. How does that compare to your KS and/or the Titans?
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I never bought a Titan spring in the end, I went for a standard one for the Stingray, which was a few years ago, and it needed cutting down, I ended up taking a coil too much off it but that wasn't important to me, as it was just for short range stuff. I never measured the standard one, but the KS I just bought had what looked like a standard spring, it still had the paint marks on which I remember the Stingray spring had. Just looked on the Chambers site, and they list the same spring for both rifles, MS066, no info on the size but say it needs shortening to 28.5 coils to fit Haenel rifles. I've not yet done the muzzle energy calcs on the KS as that piston washer is tight and running in, first shots with Superdomes were a lowly 517 fps, but after 20 shots they'd climbed to 560. As I was using the same Chrono Gary Chillingworth recently tested on YT, which he said was under reading, I thought that was good enough for what I wanted. Remains to be seen if the tight washer settles, or gives a harsh recoil and needs sizing, but the next job is the barrel, it's a bit bent.
 
I've just put a new piston seal, breech seal and OEM spring and guide into my Vulcan KS

It won't break 9.5ft/lb

I've never had any 27mm Webley struggling to make power before

Bit stumped on this particular one......
 
Gat Man said:
I've just put a new piston seal, breech seal and OEM spring and guide into my Vulcan KS

It won't break 9.5ft/lb

I've never had any 27mm Webley struggling to make power before

Bit stumped on this particular one......
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Had something similar in one I rebuilt last year. I opted for a WW kit, which was great.
If you used the red Knibbs seal - as I had, I’d suggest binning it and trying the purple chambers one.
Took mine from low 9’s with the red seal to mid 11’s with the purple, all else remaining the same between set ups.
 
It's gone from 9.5 with the purple Chambers seal, right down to 6.5 with a green Macarri seal, then back to 9.5 with a Knibbs seal

Might have to order an Ozzie seal as they go great in all my guns

I've fiund the purple seals are really brittle and prone to easy damage on assembly so I tend to avoid them tbh, but might have another look

Maybe I just need one more power washer
 
Gat Man said:
It's gone from 9.5 with the purple Chambers seal, right down to 6.5 with a green Macarri seal, then back to 9.5 with a Knibbs seal

Might have to order an Ozzie seal as they go great in all my guns

I've fiund the purple seals are really brittle and prone to easy damage on assembly so I tend to avoid them tbh, but might have another look

Maybe I just need one more power washer
Click to expand...
My .22 MKll with a Knibbs is producing around 9.5 with Hobbys and 11.3 with 5.55 FTTs. Go figure that one! It's probably to do with the "imperial" barrel but it didn't do that before the seal change.

I've bought a purple seal from Protek, it looks OK but I haven't got round to fitting it yet. Not sure if it's the same as the Chambers seal or not?
 
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