[vindicareassassin]

A good guide well done me thinks, very informative to the FNG :yup:

Just to clear up a few things......

Boring out the nozzle does indeed increase FPS, by a fair amount if your not shy with the drill size..... combine this with a deep ported and polished cylinder head and you can gain around 60 fps if done right and you get the port shape right.

Far more effective, but more effort required, is the rubber O ring set into a home ground groove at the point wher the nozzle finishes going into the hop rubber, so that the O ring presses against the rubber, this seals the nozzle/rubber joint far more effectively. I would still do the nozzle/polish shimming though as this helps to guide the nozzle into the hop unit at a nice straight angle.

Dont be fooled by a short barrel vs fps, you can get almost as much fps from a short barrel as you can from a long, PROVIDED that, and this is the most important thing, the cylinder a barrel volume are matched, you should be aiming for a ratio of between 1.7 & 2.4 cylinder volume over ANY barrel length, lower volume suits lighter ammo, higher volume suits heavy.

Obviously, this is all relative as should you fit a longer barrel your fps will undowtedly go up, but if you prefer to use a scout length rifle, as I have been known to do upon occassion, then feel comfty in the knowledge you to can still use the big number fps' you just have to put a little more effort into extracting it.

Barrel length is not as important as everyone seems to make out and if you are running an 800mm barrel you need a slap, and if your using anything over 510mm you need a kick in the arse, these lengths are pointless and only gain you fps over any kind of accuracy you could be using more constructivley. Longer and tighter are most definately NOT better!!

Yes, yes, there are now going to be loads of pillocks come on here and claim their 1000mm x 5.97mm barrel will give a 2" group @ 500 yards and I will call :bs: , 10 years practical airsoft gungineering experience tells me so, unless its been built specificaly to sit in a vice and shoot at paper.

Lastly theres no mention of LRBs, I know alot of ordinary folks out there don't know of or understand them, or how to go about installing them, but there still worth a mention as they are highly effective for minimal out lay, I'm sure myself or cheeseman can help with any relavent questions ( there's also a thread I wrote about them in the AEG section ), and to save you all looking.... http://www.airsoftsniperforum.com/showthread.php?t=2946

Rants, pointers and pokes in the right direction over...

Peace...

Carry on! :shot:

 

[vindicareassassin]

Vindicare, I would like to ask for permission to quote some of your paragraphs so they can be placed into the original document. May I?

As for the LRBs, I typed up this document specifically for FPS. Because I'm not fully experienced with LRBs yet, does it have any noticeable affect on increasing FPS?

I may be planning on writing an Accuracy document similar to this, but focusing on just accuracy so I'm not sure if LRBs belongs here or there or perhaps both.

Yes, you may, feel free to do what you will with it, and this 1 if you so choose :tup:

LRBs do indeed increase fps, as they reduce the amount of required hop pressure to lift any given weight of bb, there-by giving an increase in fps as its not being waisted trying to push the bb passed the hop nub...... obviously you cant predict how much fps gain you get as that is governed by the bend amount in your LRB vs the bb weight you are using, but be sure there will be a gain of some sort.

As an aside from this, long hops, of which ever form you choose, also benefit in the same way for similar reasons as LRBs to a certain degree, ie. hop nub pressure vs lift given...... the fps gain is marginal but if your after that last enth......, so may also be worth a mention :yup:

 

[vindicareassassin]

I have not noticed the LRBs increasing fps, but we may be using different styles.

Yup, I noticed the gain when I fitted my LRB mod to my EMR, as I continued to use the .28s I always had.

I had to back the hop off as the LRB was now sending the bbs into orbit and when I cronoed again I had gained about 15 fps.....

Then I fitted my version of a long hop mod, and to stop the long hop/LRB combo sending the bb into the stratosphere the hop had to be set to bairly an angles touch, and with it I gained an average of another 10 fps.

Obviously if I'd chosen to use .4s right from the time I fitted the LRB I'd of noticed zip, and probably an fps dip from having to wind on the hop some more to help lift the bb :shrug:

I think they are a trade off, if your willing to stick to a lighter bb, you'll gain fps, if you are fitting the mods to be able to use heavier ammo, then the likleyhood is you will lose some fps, whether that would be the equvilent to the fps you would lose by just winding the hop on to get that heavy bb to fly flat, level and for any distance I do not know, but experience tells me it would like as not jam before you could get it anywhere near that of an LRB/L hop combo :shrug:

So surely this proves they would indeed give some benefit to increasing the fps, if in a more USEFUL way than just ''balls to the wall'' power......

Maybe its just me being anal about my limited fps and trying to extract asmuch USEFUL energy from those measely 350fps as is possible, As Ive written many a time and I've witnessed you write on various occassions.... sometimes its not about the power that makes the difference, its how you choose to deliver the, heavier than expected, projectile that counts:shrug: