For the EXPERTS in fps loss

Spa · April 3rd, 2007, 01:39

wow thats really helpful, as i was condering putting 20 peices of paper hung up in a row on paper clips lined on a string then estimating..lol, appricaite it!

dirtywonton · April 3rd, 2007, 17:07

I dun use anything buy pop cans...oh, and for those fps numbers to work, it has to be a normal Coke can...there are countries that make thicker walled coke cans....beats me why.

Dun try some other cans as different companies make cans of different wall thicknesses

gamz · April 3rd, 2007, 17:13

Quote:

Originally Posted by mcguyver

Use a popcan. Works reasonably well.

Under 320 fps - no penetration
320-360 penetrates one side only
360-400 penetrates both sides
400-430 penetrates bottom only
430-480 penetrates top only
500+ penetrates top and bottom

At what distance from muzzle-to-can?

Spa · April 3rd, 2007, 17:29

yeah gamz i was just thinking about that too:P

WhatTheWho · April 3rd, 2007, 17:42

http://www.airsoftretreat.com/featur...r_mans_chrono/

gamz · April 3rd, 2007, 17:47

Quote:

Originally Posted by WhatTheWho

http://www.airsoftretreat.com/featur...r_mans_chrono/

Ah thanks man, I was looking for that.

mcguyver · April 3rd, 2007, 19:53

Quote:

Originally Posted by gamz

At what distance from muzzle-to-can?

Less than 1 foot. My numbers are approximate and using different cans varies the numbers, but it's a general range.

Spa · April 4th, 2007, 14:05

better then nothing with the do it yourself chrono... and about the grease, they are out of stock so i gotta wait 7 days till it comes in

but i will get back here soon.

Spa · April 5th, 2007, 00:28

So, i tested my fps the poor mans wasy with the new and old nozzle....and no change... and it somewhat penetrated the can. so its not the nozzle.

I believe the problem is the hop up. to help describe it better I have soem pictures

Spa · April 5th, 2007, 01:36

you know what....i checked my old stock parts and they were really really greasy. then i check my parts and theres little to no lube at all, the hop up is perfect b/c when i blow on it no air is leaking anywhere.

Its the grease...i believe theres blow back causing it to lsoe the fps.

yanhchan · April 5th, 2007, 14:10

Quote:

Originally Posted by Spa

yeah gamz i was just thinking about that too:P

2inchs supposedly

Rico · April 5th, 2007, 16:15

I have the same problem with my CA249 actually. Much like your problem, it seemed to happen spontaneously. It happened after I had shredded a piston and swapped in a new one (I had done this before with no prior problems). I ended up swapping the stock CA piston head for a stock TM one and it did make a bit of an improvement. It still shoots a bit low for the spring but it seems to have quasi-fixed the problem.

I'm running:
SystemT tightbore
Prometheus Red hop up
SystemA piston
TM piston head

I was planning to swap out the piston/cylinder head to see if that is a permanent fix.

Spa · April 5th, 2007, 16:47

ahh thanks rico ill try it.

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

April 3rd, 2007, 17:42	#20
WhatTheWho Trader rating Join Date: Dec 2002 Location: Edmonton, AB	http://www.airsoftretreat.com/featur...r_mans_chrono/ __________________ "The greatest pleasure in life is doing what people say you cannot do."

April 3rd, 2007, 01:39	#16
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	wow thats really helpful, as i was condering putting 20 peices of paper hung up in a row on paper clips lined on a string then estimating..lol, appricaite it!

April 3rd, 2007, 17:07	#17
dirtywonton Trader rating Join Date: Apr 2007	I dun use anything buy pop cans...oh, and for those fps numbers to work, it has to be a normal Coke can...there are countries that make thicker walled coke cans....beats me why. Dun try some other cans as different companies make cans of different wall thicknesses

April 3rd, 2007, 17:29	#19
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	yeah gamz i was just thinking about that too:P

April 4th, 2007, 14:05	#23
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	better then nothing with the do it yourself chrono... and about the grease, they are out of stock so i gotta wait 7 days till it comes in but i will get back here soon.

April 5th, 2007, 00:28	#24
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	So, i tested my fps the poor mans wasy with the new and old nozzle....and no change... and it somewhat penetrated the can. so its not the nozzle. I believe the problem is the hop up. to help describe it better I have soem pictures

April 5th, 2007, 01:36	#25
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	you know what....i checked my old stock parts and they were really really greasy. then i check my parts and theres little to no lube at all, the hop up is perfect b/c when i blow on it no air is leaking anywhere. Its the grease...i believe theres blow back causing it to lsoe the fps.

April 5th, 2007, 16:15	#27
Rico Trader rating Join Date: Nov 2004 Location: Mississauga, On	I have the same problem with my CA249 actually. Much like your problem, it seemed to happen spontaneously. It happened after I had shredded a piston and swapped in a new one (I had done this before with no prior problems). I ended up swapping the stock CA piston head for a stock TM one and it did make a bit of an improvement. It still shoots a bit low for the spring but it seems to have quasi-fixed the problem. I'm running: SystemT tightbore Prometheus Red hop up SystemA piston TM piston head I was planning to swap out the piston/cylinder head to see if that is a permanent fix.

April 5th, 2007, 16:47	#28
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	ahh thanks rico ill try it.

For the EXPERTS in fps loss

Doctor's Corner