Airsoft Canada - View Single Post - Problems/Questions Upgrading M733 To 400 Fps

Trader rating · June 29th, 2006, 15:05

sounds like you have air seal problems...for all reasons, you should be OVER 400fps.

but, since its an old gun, the cylinder head oring may be dried out. Lube it, lube it like crazy. thats one way to find out if its a air seal problem. I had the problem with my AK. had all the parts and was getting really low FPS. i dumped all kinds of lube in the cylinder...i mean lots. and didnt fire it before the chrony. all the extra lube isnt a solution, but if its an air seal problem, your 1st shot with the extra lube should tell you what the problem is.
with my AK, i was almost 200fps lower then what i should have been...and i couldnt figure it out. so i lubed it like mad and fired it through the chrony...my 1st shot was back up to where it should be...that told me that it should be one of the fallowing:
cylinder head
piston head
cylinder
nozzel
but thats just something i tired, and its messy.

also, check your hopup, lube it....also make sure the barrel is in the right position...once while installing my tightbore in my SR16, the spring on the hopup fell off during install and i was getting low fps because the barrel was to far up from the mechbox.

June 29th, 2006, 15:05	#2
Droc Guest Trader rating	sounds like you have air seal problems...for all reasons, you should be OVER 400fps. but, since its an old gun, the cylinder head oring may be dried out. Lube it, lube it like crazy. thats one way to find out if its a air seal problem. I had the problem with my AK. had all the parts and was getting really low FPS. i dumped all kinds of lube in the cylinder...i mean lots. and didnt fire it before the chrony. all the extra lube isnt a solution, but if its an air seal problem, your 1st shot with the extra lube should tell you what the problem is. with my AK, i was almost 200fps lower then what i should have been...and i couldnt figure it out. so i lubed it like mad and fired it through the chrony...my 1st shot was back up to where it should be...that told me that it should be one of the fallowing: cylinder head piston head cylinder nozzel but thats just something i tired, and its messy. also, check your hopup, lube it....also make sure the barrel is in the right position...once while installing my tightbore in my SR16, the spring on the hopup fell off during install and i was getting low fps because the barrel was to far up from the mechbox.