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Old July 31st, 2014, 15:53   #16
lurkingknight
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the problem is nobody sells a v6 tappet spring. I have a couple springs from fastenal, one is too stiff, one is too soft.

tappet spring already stretched to test. no joy.
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Old July 31st, 2014, 18:07   #17
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Ummm the cobwebs in my brain remind me someone on here was selling a P90 all parted out, I presume 1 or 2 crucial parts were toast... maybe a couple weeks back? Do some searching cuz I remember lots of pieces up for sale, maybe luck will win out, can't remember who it was that was selling it off though
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Old July 31st, 2014, 18:33   #18
lurkingknight
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someone else's used spring is more than likely not to be any better than my used spring.
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Old July 31st, 2014, 18:39   #19
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Maybe, but I've owned 2 P90s and they ran for years without having this issue, so I don't think it's a given. Best of luck though!
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Old July 31st, 2014, 19:18   #20
jordan7831
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Originally Posted by DipTwit View Post
Ummm the cobwebs in my brain remind me someone on here was selling a P90 all parted out, I presume 1 or 2 crucial parts were toast... maybe a couple weeks back? Do some searching cuz I remember lots of pieces up for sale, maybe luck will win out, can't remember who it was that was selling it off though
Lol that was me. The parts are all gone.

I just had a thought. So it seems that when full, your mid caps are exerting too much spring pressure to ensure reliable feeding. So that is not going to be affected by the tappet spring as that only pushes the BB into the chamber. It sounds more like the increased spring pressure from the fully loaded mag is causing the nozzle to snag slightly causing misfeeds.

So what if you used one of those SHS selector spacers to pull the tappet plate back just a bit farther rearward. That should pull the nozzle back far enough to ensure more reliable feeding.
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Old July 31st, 2014, 20:51   #21
Short Round
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Quote:
Originally Posted by jordan7831 View Post
Lol that was me. The parts are all gone.

I just had a thought. So it seems that when full, your mid caps are exerting too much spring pressure to ensure reliable feeding. So that is not going to be affected by the tappet spring as that only pushes the BB into the chamber. It sounds more like the increased spring pressure from the fully loaded mag is causing the nozzle to snag slightly causing misfeeds.

So what if you used one of those SHS selector spacers to pull the tappet plate back just a bit farther rearward. That should pull the nozzle back far enough to ensure more reliable feeding.
I think you might be on to something here.

I just finished taking apart my gearbox, and did some tinkering around with some of the suggestions people have made in the thread. Problem is still persistent, however I am getting a consistent +1/-1 fps difference now

@lurkingknight, if you want a new tappet plate spring what if you bought a V7 spring set as seen here: http://www.airsoftstore.ca/index.php...products_id=68

Then just cut it down to you liking
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Old August 1st, 2014, 00:56   #22
lurkingknight
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I did exactly that. I picked up a v7 spring kit the springs are not the same diameter or compression rate.

the g&g m14 uses a spring similar to the p90 tappet spring, it might be a bit longer, but again, nobody sells that either.

mag pressure is a theory several people have brought up. However it can't be the sole cause of the problem because the exact same mags worked fine before, fully loaded for 2 years.

A sector delayer has been installed since the gun was built.
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Old August 3rd, 2014, 01:59   #23
pestobanana
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I'd find a different nozzle that has a bit less wobble. Lonex nozzles tend to wobble quite a bit on Lonex cylinder heads in my experience. One batch of SHS cylinder heads had a slightly larger bore on the nozzle, and resulted in very little wobble with a Lonex nozzle.
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Old August 21st, 2014, 22:30   #24
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So I smashed up my APS v2 gearbox from way back after failing to weld it, and realized that it used a v6 look-a-like spring. If the dimensions are the same in the picture as your spring, give me a message and I can probably sell it to you for a few bucks; albeit I'm not age verified, I'm still waiting on it so if it's a match and you don't mind waiting, it's all up to you.

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