Titan GP shoots about 670 with 14.3 grain. Must replace piston seal?

Titan GP shoots about 670 with 14.3 grain. Must replace piston seal?

Joined: September 20th, 2005, 11:57 pm

July 12th, 2011, 8:17 am #1

I've got my compressor cleaned up and screws tightened but it's been years. Do I have to replace the seal? Is it possible that it shoots low and the seal is not cut? Or that changing it to a gamo shadow replacement seal will not make a difference or not work? Its the only seal I have. It's bright orange. Thanks in advance for any input.

Correction it a seal for a GAMO CFX. And also it squeals when I cock it. Sounds like piston seal.
Last edited by jcnesqmba on July 12th, 2011, 8:30 am, edited 1 time in total.
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Joined: September 20th, 2005, 11:57 pm

July 12th, 2011, 12:53 pm #2

And added 2 pieces of leather. 1 to pad the piston and the rear circular plate, and another between that plate and the end plug. I hope that will make shots seem quieter and feel softer. Still cocks. I'm ready to test tomorrow.
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Joined: September 20th, 2005, 11:57 pm

July 13th, 2011, 6:31 am #3

If I compressed the ram with a quarter inch preload using leather, would that reduce the power? I was hoping to up it. Also my piston seal is real tight. So I might need to wear it in.

Here's some fps:
Kodiaks 607, 614,608, 605, 613
Benjamin Diablo 666, 690,640, 663, 680
Super H point 719, 721, 701
Hunters 685, 675, 678, 
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Joined: March 26th, 2008, 2:38 am

July 13th, 2011, 1:19 pm #4

720 with RWS' are not a bad speed.

You are right, as your seal breaks in a little, you should see a little improvement.

I looked this rifle up, and here is what bothers me......

"22 delivers 950 fps w/lightweight, lead-free pellets, 800 fps with lead pellets "

You rarely see a velocity claim that doesn't have the "lightweight" pellets listed at around 200 fps faster than lead.
From my experience, if a .22 will shoot a 9-10 grain pellet at 900, you can expect to see ~ 700 fps with normal weight pellets, provided your force is constant.
So, if this holds true---950 fps with the lightweights would give somewhere around 750 with 14.3 grains. Couple this with the assumption that 950 fps was probably the "FASTEST" speed, and that when tested it was dieseling some.....well, you get the idea.

I can't see you being able to adjust power output TOO much by making physical adjustments, maybe getting more volume into the chamber somehow.

Just my opinion.

God bless,

Farmer


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Joined: May 1st, 2009, 5:02 am

July 14th, 2011, 3:45 am #5

If I compressed the ram with a quarter inch preload using leather, would that reduce the power? I was hoping to up it. Also my piston seal is real tight. So I might need to wear it in.

Here's some fps:
Kodiaks 607, 614,608, 605, 613
Benjamin Diablo 666, 690,640, 663, 680
Super H point 719, 721, 701
Hunters 685, 675, 678, 
from what I've seen in various places on the internet, you're right in the ballpark for the Titan. Average seems to be about 700-750.
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Joined: September 20th, 2005, 11:57 pm

July 14th, 2011, 6:50 pm #6

720 with RWS' are not a bad speed.

You are right, as your seal breaks in a little, you should see a little improvement.

I looked this rifle up, and here is what bothers me......

"22 delivers 950 fps w/lightweight, lead-free pellets, 800 fps with lead pellets "

You rarely see a velocity claim that doesn't have the "lightweight" pellets listed at around 200 fps faster than lead.
From my experience, if a .22 will shoot a 9-10 grain pellet at 900, you can expect to see ~ 700 fps with normal weight pellets, provided your force is constant.
So, if this holds true---950 fps with the lightweights would give somewhere around 750 with 14.3 grains. Couple this with the assumption that 950 fps was probably the "FASTEST" speed, and that when tested it was dieseling some.....well, you get the idea.

I can't see you being able to adjust power output TOO much by making physical adjustments, maybe getting more volume into the chamber somehow.

Just my opinion.

God bless,

Farmer

I met a guy who just got a Benjamin trail XL. He got it for the 1500 fps. For most who don't have chrony and don't go on the forums. They'll be happy enough with a gun they believe shoots 1500 fps. Even if it won't hit anything smaller than a quarter.

But yes it's confusing to me when I just got back into airguns. But gamo has always done the numbers game so I guess it's the way of the world now.
.
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Joined: March 26th, 2008, 2:38 am

July 15th, 2011, 2:35 am #7

If those RWS hollows shoot between 715 and 725 each time, and it will stack'em.....

In 2 months I guarantee you won't mind the speed one bit.

Next purchase from Pyramyd, try the "tech force" domes as your freebee. Every gun that I have that shoots RWS pellets well, will also shoot those cheap chinese pellets well. Great value.

Blessings,

Farmer
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Joined: October 10th, 2003, 5:24 am

July 15th, 2011, 2:55 am #8

I've got my compressor cleaned up and screws tightened but it's been years. Do I have to replace the seal? Is it possible that it shoots low and the seal is not cut? Or that changing it to a gamo shadow replacement seal will not make a difference or not work? Its the only seal I have. It's bright orange. Thanks in advance for any input.

Correction it a seal for a GAMO CFX. And also it squeals when I cock it. Sounds like piston seal.
Check PA's ads. There's a high power and low power (mid-600's). I imagine you got the high power model, though.

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Joined: August 4th, 2010, 6:03 am

July 15th, 2011, 5:17 pm #9

Other than performance is there a way to tell which version one has? What is the diff in FPS between the two. Tim A.
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Joined: September 20th, 2005, 11:57 pm

July 15th, 2011, 8:53 pm #10

Check PA's ads. There's a high power and low power (mid-600's). I imagine you got the high power model, though.
Nt.
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