Low fps with 1.4J spring

conrad13 · March 26th, 2007, 20:51

Ok gents, I've got a 1.4J KM (120M) spring in my V2 GB and it's only shooting 330. The rest fo the GB internals are as follows; TM piston and piston head, gears, tappet plate; SRC nozzle, cylinder, and cylinder head.

It has been suggested to me that there is an air leak. Schwag suggested I check my hopup sleeve and see if it was in a oval shape instead of round. I did and it is round. Now I personally think that some of the problem has to do with the SRC parts but I don't know enough to make a fully informed decision.

ILLusion · March 26th, 2007, 21:05

What gun is it and what inner barrel (bore & length) do you have?

conrad13 · March 26th, 2007, 23:08

It's an M16A4, It believe it's a standard size M16 inner barral, sothing like 509mm.

CDN_Stalker · March 26th, 2007, 23:20

Could be your nozzle isn't mating properly with the hop up unit you have. I've experienced that by changing a square nosed G&P nozzle in an SPR with a rounded one, about 60fps airloss was common. I swapped the hop up unit out for a different one, gained about 40-50fps in increased velocity.

ILLusion · March 27th, 2007, 02:23

Might also want to check your piston head's o-ring seal.

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March 26th, 2007, 20:51	#1
conrad13 Trader rating Join Date: Dec 2004 Location: Oakville, Ontario	Low fps with 1.4J spring Ok gents, I've got a 1.4J KM (120M) spring in my V2 GB and it's only shooting 330. The rest fo the GB internals are as follows; TM piston and piston head, gears, tappet plate; SRC nozzle, cylinder, and cylinder head. It has been suggested to me that there is an air leak. Schwag suggested I check my hopup sleeve and see if it was in a oval shape instead of round. I did and it is round. Now I personally think that some of the problem has to do with the SRC parts but I don't know enough to make a fully informed decision.

March 26th, 2007, 21:05	#2
ILLusion GBB Whisperer Trader rating Join Date: Jun 2002 Location: Toronto	What gun is it and what inner barrel (bore & length) do you have? __________________ *Advanced Airsoft Armaments and Enhancements* Quick to the gun, sure of your grip. Quick to the threat, sure of your shot. Diligentia, Vis, Celeritas Accuracy, Power, Speed

March 26th, 2007, 23:20	#4
CDN_Stalker Official ASC Bladesmith Trader rating Join Date: Jul 2003 Location: Ottawa, Ont.	Could be your nozzle isn't mating properly with the hop up unit you have. I've experienced that by changing a square nosed G&P nozzle in an SPR with a rounded one, about 60fps airloss was common. I swapped the hop up unit out for a different one, gained about 40-50fps in increased velocity. __________________ STKR Knives http://www.facebook.com/#!/pages/STK...17036668380871

March 26th, 2007, 23:08	#3
conrad13 Trader rating Join Date: Dec 2004 Location: Oakville, Ontario	It's an M16A4, It believe it's a standard size M16 inner barral, sothing like 509mm.

March 27th, 2007, 02:23	#5
ILLusion GBB Whisperer Trader rating Join Date: Jun 2002 Location: Toronto	Might also want to check your piston head's o-ring seal. __________________ *Advanced Airsoft Armaments and Enhancements* Quick to the gun, sure of your grip. Quick to the threat, sure of your shot. Diligentia, Vis, Celeritas Accuracy, Power, Speed

Low fps with 1.4J spring

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