Famas 350 fps upgrade

TaktikAirsoft · August 24th, 2009, 16:59

Hello

I want to play around and upgrade my Famas to 350 fps plus.

My idea is the fallowing

120 spring (suggestion are welcome)

bushing (bearing 6mm)

Piston head (suggestion are welcome)

I have 2 mech boxes to play with, so if you have any other configs or suggestions send them my way.

yuhaoyang · August 24th, 2009, 17:15

put in a prommy MS100SP, some metal bushings (not bearings, or bearings on the bevel gear), and any piston head you want, although you could consider the modify bearing piston head?

TaktikAirsoft · August 24th, 2009, 17:22

Why not put bearing for bushings?

yuhaoyang · August 24th, 2009, 17:51

because bearings aren't meant for high impact applications. Also the smaller the ball bearings are; usually the weaker they become (this is excluding quality comparison between lets say ACM and prometheus parts), anyways, 6mm bearings will be pretty weak. The bevel gear takes the least stress and spins the fastest out of the 3 gears, so 2 bearings and 4 bushings wouldn't be a bad idea.

TaktikAirsoft · August 24th, 2009, 17:59

OK

So I will stick with the metal bushings...

Goge · August 24th, 2009, 19:00

I just brought up my brothers FAMAS to 350, only changed spring and bushings, PDI130 (which was somehow shooting 400ish) and 6mm steel bushings. Maybe I should have got a V2 steel spring guide and cut the nub off for the famas mechbox. I ended cutting off about an inch from the spring to drop the fps down.

Here's my post of FAMAS problems. http://www.airsoftcanada.com/showthread.php?t=87781

Goodluck

TaktikAirsoft · August 24th, 2009, 19:13

So if I put a PDI120... I should be OK

Goge · August 24th, 2009, 19:17

honestly, from what I've been told and have read I'd stay away from PDI springs all together. Get a good quality modify spring. it might be $10 more but $10 to make sure your one of a kind FAMAS internals don't e'splode on you is worth it in my eyes.

TaktikAirsoft · August 24th, 2009, 20:13

What do you suggest as a spring to buy?

What brand?

What tention?

Quote:

Originally Posted by Goge

honestly, from what I've been told and have read I'd stay away from PDI springs all together. Get a good quality modify spring. it might be $10 more but $10 to make sure your one of a kind FAMAS internals don't e'splode on you is worth it in my eyes.

Goge · August 24th, 2009, 20:21

Quote:

Originally Posted by CDN_Stalker

PDI springs are crap, they have such bad consistancies from spring to spring (and Im talking about the same rating)................... I've had a handfull PDI 150% springs come across my bench, and they've been from 350fps to 425fps (and a pain to install), and different lengths too. The 350fps one I have is 6 3/8" long, most of the others were closer to 7", and had one that was right on 7" long. Nutshell, scrap that spring (any PDI spring is garbage that'll end up wrecking your gun), buy a Modify 90 from airsoftparts, install and have fun playing. That spring should keep you under 350fps (considering the long barrel in it), it nets me around 330fps in one of my MP5s.

That was the advice I was given and Stalker is a knowledgeable guy so I'd trust what he says.

yuhaoyang · August 24th, 2009, 20:59

Prometheus...!!!???

GreyFox132 · September 4th, 2009, 02:07

why not upgrade your famas further

TaktikAirsoft · September 4th, 2009, 20:44

What do you suggest then???

Quote:

Originally Posted by GreyFox132

why not upgrade your famas further

cckeong · January 6th, 2010, 04:01

My stock famas only 240fps while using 8.4v stock battery.Can I use a LIPO 20C battery but the gear box will last?I also brought a Element M135 spring....

Jonoats · January 9th, 2010, 10:53

If you wanna fire between 350 and 400 use something like a guarder sp110. Search around to find out what company you like best but any 110 spring should give you what you're looking for. They don't require gear replacement, and don't put too much tension on your motor. If you go 120 or higher get steel gears, and shim it perfect.

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August 24th, 2009, 16:59	#1
TaktikAirsoft formerly moogy Trader rating Join Date: Mar 2008 Location: Montreal	Famas 350 fps upgrade Hello I want to play around and upgrade my Famas to 350 fps plus. My idea is the fallowing 120 spring (suggestion are welcome) bushing (bearing 6mm) Piston head (suggestion are welcome) I have 2 mech boxes to play with, so if you have any other configs or suggestions send them my way. __________________ ~~~Honor The Game(tm)~~~

August 24th, 2009, 17:22	#3
TaktikAirsoft formerly moogy Trader rating Join Date: Mar 2008 Location: Montreal	Why not put bearing for bushings? __________________ ~~~Honor The Game(tm)~~~

August 24th, 2009, 17:59	#5
TaktikAirsoft formerly moogy Trader rating Join Date: Mar 2008 Location: Montreal	OK So I will stick with the metal bushings... __________________ ~~~Honor The Game(tm)~~~

August 24th, 2009, 17:15	#2
yuhaoyang asexual lumbricus terrestris Trader rating Join Date: Jan 2009 Location: Edmonton west	put in a prommy MS100SP, some metal bushings (not bearings, or bearings on the bevel gear), and any piston head you want, although you could consider the modify bearing piston head?

August 24th, 2009, 17:51	#4
yuhaoyang asexual lumbricus terrestris Trader rating Join Date: Jan 2009 Location: Edmonton west	because bearings aren't meant for high impact applications. Also the smaller the ball bearings are; usually the weaker they become (this is excluding quality comparison between lets say ACM and prometheus parts), anyways, 6mm bearings will be pretty weak. The bevel gear takes the least stress and spins the fastest out of the 3 gears, so 2 bearings and 4 bushings wouldn't be a bad idea.

August 24th, 2009, 19:00	#6
Goge Trader rating Join Date: Dec 2003 Location: Toronto Ontario	I just brought up my brothers FAMAS to 350, only changed spring and bushings, PDI130 (which was somehow shooting 400ish) and 6mm steel bushings. Maybe I should have got a V2 steel spring guide and cut the nub off for the famas mechbox. I ended cutting off about an inch from the spring to drop the fps down. Here's my post of FAMAS problems. http://www.airsoftcanada.com/showthread.php?t=87781 Goodluck __________________ he who sleep with itchy butt, wake with smelly finger.

August 24th, 2009, 19:13	#7
TaktikAirsoft formerly moogy Trader rating Join Date: Mar 2008 Location: Montreal	So if I put a PDI120... I should be OK __________________ ~~~Honor The Game(tm)~~~

August 24th, 2009, 19:17	#8
Goge Trader rating Join Date: Dec 2003 Location: Toronto Ontario	honestly, from what I've been told and have read I'd stay away from PDI springs all together. Get a good quality modify spring. it might be $10 more but $10 to make sure your one of a kind FAMAS internals don't e'splode on you is worth it in my eyes. __________________ he who sleep with itchy butt, wake with smelly finger.

August 24th, 2009, 20:59	#11
yuhaoyang asexual lumbricus terrestris Trader rating Join Date: Jan 2009 Location: Edmonton west	Prometheus...!!!???

September 4th, 2009, 02:07	#12
GreyFox132 Trader rating Join Date: Jul 2007 Location: Barrie Ontario	why not upgrade your famas further

January 6th, 2010, 04:01	#14
cckeong Trader rating Join Date: Dec 2009	FAMAS UPGRADE question My stock famas only 240fps while using 8.4v stock battery.Can I use a LIPO 20C battery but the gear box will last?I also brought a Element M135 spring....

January 9th, 2010, 10:53	#15
Jonoats Banned Trader rating Join Date: Apr 2009 Location: ON, Canada :)	If you wanna fire between 350 and 400 use something like a guarder sp110. Search around to find out what company you like best but any 110 spring should give you what you're looking for. They don't require gear replacement, and don't put too much tension on your motor. If you go 120 or higher get steel gears, and shim it perfect.

Famas 350 fps upgrade

Upgrades & Modifications