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LCT VSS Issues

  • Thread starter Thread starter JinxDuh
  • Start date Start date
Lozart said:
If anything the lips on the ML rubber are longer than the OEM one. I highly doubt the overall shorter length is causing a leak though.
Click to expand...
Just trying to give myself hope ? I ordered 2 new nozzles from ak2m4, I’m going to try the original rubber and test it - Mostly as something to do ?

 
Just for my own edification - at 280 fps on a 0.25 you would be getting 1.82J. What are you aiming for?

What cylinder are you using?

 
I’m trying for around 410 FPS, on the stock rubber I just chrono’d it at 259.5 (Highest, hop fully on) and 162.5 (Lowest, hop fully off) with it being 239.5 in the middle (With a variation of 1 roughly, it was like .7, .1 etc) - This is on .25g BB’s

Chrono is suggesting that at 239.5 fps it’s 0.666 joules

View attachment 131111

 
JinxDuh said:
I’m trying for around 410 FPS, on the stock rubber I just chrono’d it at 259.5 (Highest, hop fully on) and 162.5 (Lowest, hop fully off) with it being 239.5 in the middle (With a variation of 1 roughly, it was like .7, .1 etc) - This is on .25g BB’s

Chrono is suggesting that at 239.5 fps it’s 0.666 joules

View attachment 131111
Click to expand...




Sorry, yes you're right. Finger trouble entering 0.25 (put 0.5 by mistake!)

What cylinder is in there?

 
Lozart said:
Sorry, yes you're right. Finger trouble entering 0.25 (put 0.5 by mistake!)

What cylinder is in there?
Click to expand...
Gearbox is completely Lct standard from what I can tell, the only thing I’ve changed is the short nozzle for a longer AK version - And the titan of course. The original shorter nozzle had no compression behind it at all, I took the o-ring from it today and it’s seen better days for sure. 

 
Considering replacing the cylinder assembly and trying that, but at the same time I don’t want to keep spending on a project ?

Maple leaf rubber with standard barrel and I’m getting this constantly with the hop arm all the way forwards ?

View attachment 131113
 

Edit:

Didn’t realise how “cheap” replacement parts would be. Poor ak2m4, he’s had like 4 sporadic orders from me this week already, and it’s only Tuesday! ?

 
Last edited:
I meant, is it a ported cylinder at all? That would explain why you're losing so much pressure.

 
Lozart said:
Yep, I'd look at changing that to either one with just a notch at the very back or one without a vent at all.

Like this https://www.ak2m4.co.uk/internal-parts/cylinders/xt-cylinder-anti-heat-5-6

or https://www.ak2m4.co.uk/internal-parts/cylinders/zci-stainless-steel-cylinder-tip

or https://www.ak2m4.co.uk/internal-parts/cylinders/xt-cylinder-anti-heat-closed
Click to expand...
I found a solid one in a parts box I can experiment with, see if it improves along with the new compression parts

 
JinxDuh said:
I found a solid one in a parts box I can experiment with, see if it improves along with the new compression parts
Click to expand...


Nice!

I reckon the vent in your current one is too far forward so it'll limit the max FPS you're going to achieve. Worth a try at least!

 
Lozart said:
Nice!

I reckon the vent in your current one is too far forward so it'll limit the max FPS you're going to achieve. Worth a try at least!
Click to expand...
It never even crossed my mind to be honest - Hopefully this'll solve my issues. Definitely a fun learning experience though!

 
Have you tried the paper test on the feed tube to see if there is an air loss between the nozzle and the hop rubber?

 
Got some bits for my Scar-H on it's way, if I order some other bits I'll give you shout (I'm old & might forget tho).

Just had a look at the spares & there's not much for the L85... magazine catch happens to be one listed, might be a common issue????

 
Last edited by a moderator:
gavinkempsell said:
Got some bits for my Scar-H on it's way, if I order some other bits I'll give you shout (I'm old & might forget tho).

Just had a look at the spares & there's not much for the L85... magazine catch happens to be one listed, might be a common issue????
Click to expand...
Much appreciated! From what I’ve seen/experienced the mag catch on the WE stuff does tend to wear really fast 

 
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