How many coils to cut ?

Jimski · February 20th, 2009, 13:31

Heya all,
I have this SP110 spring that gives me around 370 fps.
I want to cut it to get around 330-340 fps.
How many coils should I cut ideally ?
I don't want to cut too much, can't spend time testing either.

thank you!

CDN_Stalker · February 20th, 2009, 13:33

If it's a non-linear spring, try flipping it around so the tighter coils face forward. I've seen up to a 30fps drop from doing that before.

Jimski · February 20th, 2009, 13:35

ok thank you!
I might still cut just one coil for the sake of it.
I'd rather be under the limit than above.

CDN_Stalker · February 20th, 2009, 13:40

Do me a favour, try it as is, chrony it, let me know what fps you get. I know you don't have time for testing, but I'd like to log the info somewhere in my brain.

And I'd still say, buy a Modify 90 spring from Jugglez, it'll sit you 330-340fps (with a bearing guide guide installed).

Jimski · February 20th, 2009, 14:05

ok

CDN_Stalker · February 20th, 2009, 16:26

Thanks buddy!

Jimski · February 20th, 2009, 20:36

I got surprised by a complete depletion of my stock of grease

So, with a slight lack of grease on the piston head, I got
348 first shot
afterwards, always staying between 300 and 306, very consistent (several measures with exactly the same fps, the chrony is a madbull, hop-up is on)

it's a CA stock mechbox ver 3

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February 20th, 2009, 13:31	#1
Jimski Trader rating Join Date: Jun 2005 Location: Montreal	How many coils to cut ? Heya all, I have this SP110 spring that gives me around 370 fps. I want to cut it to get around 330-340 fps. How many coils should I cut ideally ? I don't want to cut too much, can't spend time testing either. thank you! __________________

February 20th, 2009, 13:33	#2
CDN_Stalker Official ASC Bladesmith Trader rating Join Date: Jul 2003 Location: Ottawa, Ont.	If it's a non-linear spring, try flipping it around so the tighter coils face forward. I've seen up to a 30fps drop from doing that before. __________________ STKR Knives http://www.facebook.com/#!/pages/STK...17036668380871

February 20th, 2009, 13:35	#3
Jimski Trader rating Join Date: Jun 2005 Location: Montreal	ok thank you! I might still cut just one coil for the sake of it. I'd rather be under the limit than above. __________________

February 20th, 2009, 13:40	#4
CDN_Stalker Official ASC Bladesmith Trader rating Join Date: Jul 2003 Location: Ottawa, Ont.	Do me a favour, try it as is, chrony it, let me know what fps you get. I know you don't have time for testing, but I'd like to log the info somewhere in my brain. And I'd still say, buy a Modify 90 spring from Jugglez, it'll sit you 330-340fps (with a bearing guide guide installed). __________________ STKR Knives http://www.facebook.com/#!/pages/STK...17036668380871

February 20th, 2009, 14:05	#5
Jimski Trader rating Join Date: Jun 2005 Location: Montreal	ok __________________

February 20th, 2009, 16:26	#6
CDN_Stalker Official ASC Bladesmith Trader rating Join Date: Jul 2003 Location: Ottawa, Ont.	Thanks buddy! __________________ STKR Knives http://www.facebook.com/#!/pages/STK...17036668380871

February 20th, 2009, 20:36	#7
Jimski Trader rating Join Date: Jun 2005 Location: Montreal	I got surprised by a complete depletion of my stock of grease So, with a slight lack of grease on the piston head, I got 348 first shot afterwards, always staying between 300 and 306, very consistent (several measures with exactly the same fps, the chrony is a madbull, hop-up is on) it's a CA stock mechbox ver 3 __________________ Last edited by Jimski; February 20th, 2009 at 20:40..

How many coils to cut ?

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