cracked shell

dinnybyrne

would a cracked gearbox shell bring down my fps by 100?its cracked at the thin section around the cylinder head.my own head is also cracked trying to see what the problem is!!!!!

tomaswatkins

any pictures of the crack?

dinnybyrne

crack goes around the lower corner too, what do you think?

Southern Dandy

was it firing normally before it cracked? what brand of aeg is it?

Replace it straight away, casings aint much considering a cracked shell can lead to more problems and hence more money spent!

gerrowadat

dinnybyrne wrote: »

would a cracked gearbox shell bring down my fps by 100?its cracked at the thin section around the cylinder head.my own head is also cracked trying to see what the problem is!!!!!

The problem is that your gearbox has a jaysus big crack in it. What's not to understand?

dinnybyrne

gerrowadat wrote: »

The problem is that your gearbox has a jaysus big crack in it. What's not to understand?

haha yeah but it took me ages to find the crack, I literally opened and closed it about 7 times trying new cylinders etc etc!! And less of ur lip.....

dinnybyrne

Southern Dandy wrote: »

was it firing normally before it cracked? what brand of aeg is it?

Replace it straight away, casings aint much considering a cracked shell can lead to more problems and hence more money spent!

Was firing find then I installed a mosfet then it went down about 100fps, so i just wanna make sure its the crack and not something silly i did when re-assembling the gearbox. Its a king arms m4.

Southern Dandy

dinnybyrne wrote: »

Was firing find then I installed a mosfet then it went down about 100fps, so i just wanna make sure its the crack and not something silly i did when re-assembling the gearbox. Its a king arms m4.

There generally a very good gearbox bit unusual for them to crack, It probably was cracking internally out of view and when you installed the fet it completely went then.

What i did notice is that your cylinder drilled (if its ported my apologies but it looks drilled), any idea what size spring you have running in it?

Like gerrow said its a pretty significant crack so yea that jaysus crack is the problem.

dinnybyrne

Southern Dandy wrote: »

There generally a very good gearbox bit unusual for them to crack, It probably was cracking internally out of view and when you installed the fet it completely went then.

What i did notice is that your cylinder drilled (if its ported my apologies but it looks drilled), any idea what size spring you have running in it?

Like gerrow said its a pretty significant crack so yea that jaysus crack is the problem.

yeah thats not the original cylinder i put that in after i noticed the problems.... You see when i opened the box i noticed the original cylinder had no ports( 2nd hand, from an spr) the piston also had a large slice took out of it on the top rear dont ask me why I assume it has something to do with the lack of ports. So iv changed both with some spares i had lying around. The hole you see is covered with some sellotape and a small bit of glue (as its one of those non friction coated ones) which does the job for now!

Southern Dandy

That's odd, was it a metal cylinder head or polycarb??

Your loss in power could now be down to the fact that you have a ported cylinder with a m90 spring you might be losing compression somewhere, try some epoxy bonding putty sets like concrete and you can sand it down!! But seriously get a new gearbox case.

dinnybyrne

Southern Dandy wrote: »

That's odd, was it a metal cylinder head metal or polycarb??

Your loss in power could now be down to the fact that you have a ported cylinder with a m90 spring, try some epoxy bonding putty sets like concrete and you can sand it down!! But seriously get a new gearbox case.

polycarbonate.loss of power was there BEFORE i changed the cylinder and piston, so the crack appeared with the completely blank cylinder installed. Im after sourcing a case here on boards thanks to DeBurca

Southern Dandy

dinnybyrne wrote: »

polycarbonate.loss of power was there BEFORE i changed the cylinder and piston, so the crack appeared with the completely blank cylinder installed. Im after sourcing a case here on boards thanks to DeBurca

My bad should read posts a little more clearly Problem sorted sure just odd that it cracked.

dinnybyrne

thanks for the help lads