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View Full Version : Crono help for classic RT



tweter
02-28-2009, 11:56 PM
I cant get my classic RT to crono under 430fps ive got the velocity adj all the way in and i tryed backing it out but that didnt help either, the only thing I can think of is to replace the counter wound springs? anyone have any other ideas...

ManInBlack
03-01-2009, 12:10 AM
Use an allen wrench to adjust the velocity thing counter-clockwise (out). also, make sure your tank is putting out decent pressure (800-1200psi).

secretweaponevan
03-01-2009, 12:15 AM
I cant get my classic RT to crono under 430fps ive got the velocity adj all the way in and i tryed backing it out but that didnt help either, the only thing I can think of is to replace the counter wound springs? anyone have any other ideas...

Sounds like your regulator isn't regulating. This is most likely due to a leaking reg valve seat or a problem with the regulator valve pin assembly (I think, but I learn something new every day). Inspect them for damage, nicks or anything else wonky.

tweter
03-01-2009, 12:37 AM
tried back the velocity adj all the way out to the oring seal and it only went to a higher fps..also i have a new reg piston and all new orings

MANN
03-01-2009, 10:06 AM
what is your tank output pressure? bolt is installed? what spring is installed. Is everything lubed up(IE did you use some oil in your asa?

tweter
03-01-2009, 02:03 PM
tank pressure is 750ish all lubed up with gold cup stock bolt with a rebuild kit spring

MANN
03-01-2009, 03:28 PM
tank pressure is 750ish all lubed up with gold cup stock bolt with a rebuild kit spring
I dont know what the stock bolt is, or the rebuild kit spring is. lvl7 with gold spring?

tweter
03-03-2009, 10:49 PM
I dont know what the stock bolt is, or the rebuild kit spring is. lvl7 with gold spring?




its the gold spring from the RT oring rebuild kit and yes I think its a lvl 7 if thats what came with the RT from the factory