PDI VSR hopup chamber (V.2) Anyone have experience?

[Strelok]

So, got the bulk of my gun upgraded so far. But i'm curious about this new hopup chamber that PDI has.

http://www.x-fire.org/vsr10/chamber_...mber_ver2.html

It appears to switch from VSR hopup/barrels to AEG and i'm not sure if I like that. Always been a fan of the compression and accuracy achieved by the stock system, but the two hopup arm thing does intrigue me a lot.

Has anyone had experience with this chamber, and would they recommend switching from VSR to an AEG barrel system?

Thanks

[Hectic]

cant speak of that particular system but i can say all the after market hop ups for our vsr's do that (allow use of aeg barrels) and its a good thing as it opens up a bunch of variety for barrels, prometheus as an example without having to machine it or hunt fot the odd ones that are vsr cut, i know the laylax hop up i have in my vsr is much beter then the stock one.
[I] know the PDI stuff is nice so im sure its a good upgrade.
what other upgrades you have? did you go PDI or laylax? as far as i remember the PDI hop up (the original one i guess) only works with the PDI cylender head and such so just be sure its compatible with what you have alrdy


edit i look at the link so i see it works with the stock cylender head the two sided adjustment will be andy once you get it tuned in correctly but may be more hassel then its worth, i mean if the hop up and barrel are seated straight you shouldnt need this adjustment, i know on the stock hop up sometimes its a lil sloppy (the arm shifts side to side a lil) but once shimmed or changed to the laylax hop up i never had the left or right side fliers

not sure if i like the fact that you havve to use an aeg bucking, tho it does provide options

[Strelok]

The cylinder and hopup chamber is the only two things left I need to change. So it can be either or. Where did you get your laylax stuff?

[Hectic]

been years, think i got some from redwolf some from ehobby.
they used to have an english option on the laylax site but its gone now so getting accurate discriptions are hard.
i know jugglez (airsoftparts) useually has some laylax stuff but hes sold out of hop chambers atm, ask him im sure he will get it for you.
i like the laylax one it works the same as the stock one keeps it simple

http://www.redwolfairsoft.com/redwol...R10_G_Spec.htm
at that price may as well get it for 95 from jugglez

[Drakker]

I have installed that chamber in a TSD VSR clone (with a PDI rubber and a prommy barrel)... worked decently with the stock cylinder head, FPS was a lot more stable than with the crappy stock hop-up unit and the hop-up adjustment is very precise... but once I installed a King Arms cylinder, the slightly thicker nozzle on the cylinder head would not enter the chamber smoothly and I would have to forcefully ram the bolt forward to be able to lock it. It kept shooting ok but the seal was not as good as with the stock cylinder head. It wasn't fun to use, very noisy, probably destructive in the long run, and the crappy TSD bolt handle broke anyway. So it is *NOT* compatible with all cylinder heads, you should definitely get a PDI cylinder if you plan to use it.

I have since acquired a proper TM VSR10 G-Spec and I absolutely do not plan to use the PDI chamber. Stock TM chamber for me. I'm tired of having to adjust the hop up with a specific allen key and I like the smooth operation of the stock chamber. And in my opinion (yep, my opinion), VSR style buckings are far superior to AEG style buckings for accuracy.

[Hectic]

Originally Posted by Drakker

I have installed that chamber in a TSD VSR clone (with a PDI rubber and a prommy barrel)... worked decently with the stock cylinder head, FPS was a lot more stable than with the crappy stock hop-up unit and the hop-up adjustment is very precise... but once I installed a King Arms cylinder, the slightly thicker nozzle on the cylinder head would not enter the chamber smoothly and I would have to forcefully ram the bolt forward to be able to lock it. It kept shooting ok but the seal was not as good as with the stock cylinder head. It wasn't fun to use, very noisy, probably destructive in the long run, and the crappy TSD bolt handle broke anyway. So it is *NOT* compatible with all cylinder heads, you should definitely get a PDI cylinder if you plan to use it.

I have since acquired a proper TM VSR10 G-Spec and I absolutely do not plan to use the PDI chamber. Stock TM chamber for me. I'm tired of having to adjust the hop up with a specific allen key and I like the smooth operation of the stock chamber. And in my opinion (yep, my opinion), VSR style buckings are far superior to AEG style buckings for accuracy.

thats why i went with the laylax it uses the same method to adjust as stock (actually uses the stock adjustment arm) and has a precise click every mm or so and still uses a TM vsr style bucking, just its a lil longer.
you broke yer tsd handle? wow ive been runnin over 500 fps on mine for years, that sucks the aftermarket ones are damn pricey

[Strelok]

Good to hear. I think i'll stick with the stock VSR chamber and move up to a laylax down the road. If they had done that two arm thing with a VSR barrel and hopup bucking I would have probably gone right for it.

Now just to locate a Gspec length barrel.

Thanks folks!

[Hectic]

do you wanna go into the silencer or no?
just because the cylender in the vsr volume is perfect for a barrel around 500mm i think you can fit that (or close to it) if you hide it in the silencer

[Drakker]

From what I have read around the net and on this forum, the Laylax chamber isn't really an upgrade compared to the stock TM chamber, some people have even reported worse performance. Use the Laylax chamber only if you really need to use an AEG cut barrel.

[Strelok]

I would prefer to keep it without the silencer, but if there is a benefit with, I guess i'll run one through it. I just liked the idea of keeping the gun nice and short.

[Hectic]

Originally Posted by Drakker

From what I have read around the net and on this forum, the Laylax chamber isn't really an upgrade compared to the stock TM chamber, some people have even reported worse performance. Use the Laylax chamber only if you really need to use an AEG cut barrel.

compared to the TSD one it was alot beter, and compared to the TM one its about the same quality but has a much tighter fit of the hop arm within the unit so no side to side play, and creates a beter air seal around the rubber and barrel and between the nozzle and hop rubber, (im not knocking the TM design Laylax had to do little to improve on it and its hardly improved other then allowing use of aeg cut barrels and takin the side to side slop out of the arm itself.
I think the folks who complained about the Laylax one just did a bad job installing it ie: they tighten one screw down first and create an uneaven seal.
Im sure the PDI stuff is good too just i hear it only works well with a full PDi build

OP here is a cool Gspec build http://www.airsoftretreat.com/forums...?topic=88662.0
also explains a bit about how the cylender is optomized for different barrel lengths

on my vsr clone with a 510mm inner and a pss 150 spring i get 512fps cause its like the perfect volume match
here is results of a gspec after porting the cylender to make the compression area shorte to match the barrel

With the following compression zone lengths the 313mm length barrel chrono'd as such:
93mm ~400fps (no hop) ~6mm was taken off from 1st Project
79mm ~430fps (no hop) +30
70mm ~458fps (no hop) +28
64mm ~478fps (no hop) +20
64mm ~510fps (hop set for bb retention)

Also in that thread you will see the TDC (top dead center) hop up "mod" it is sweet tho i dont know if they still make the parts

[Drakker]

Originally Posted by Hectic

compared to the TSD one it was alot beter, and compared to the TM one its about the same quality but has a much tighter fit of the hop arm within the unit so no side to side play, and creates a beter air seal around the rubber and barrel and between the nozzle and hop rubber, (im not knocking the TM design Laylax had to do little to improve on it and its hardly improved other then allowing use of aeg cut barrels and takin the side to side slop out of the arm itself.
I think the folks who complained about the Laylax one just did a bad job installing it ie: they tighten one screw down first and create an uneaven seal.
Im sure the PDI stuff is good too just i hear it only works well with a full PDi build

Newer TM hop up units do not have this problem. I've read in some places that G-Specs have actually had the "upgraded" (new model) hop up units from the beginning. Older TM VSR Pro Sniper can be upgraded with this kit:

http://shop.ehobbyasia.com/tokyo-mar...-vsr-10-1.html

As for the Laylax unit performance, people usually blamed the hop up rubber for the performance loss (going from say, a Firefly rubber to the Laylax rubber). Also, you are very limited in your hop up rubber choices with the Laylax chamber.

Of course, if you are upgrading a clone, the Laylax chamber will be great, as will the PDI, but when you're installing it in a TM, it is most likely not worth the money, unless you plan on using an AEG barrel.

I'm not saying the Laylax chamber is bad, I'm just saying it's not gonna give you better performance than the TM chamber, so it is not the most useful upgrade. Change the cylinder, piston and hop-up rubber first, then decide if it is worth it to upgrade the hop-up chamber and the barrel. I've talked to a couple of guys using TM VSR and surprisingly some of them didn't even upgrade the inner barrel (mostly G-Spec users, it is said to come with a pretty good inner barrel).

Any of the more knowledgeable VSR users on this forum mind to chip in this discussion?