Power Plenum on .25 cal., 600mm slug liner and 33.5gr NS slug

[JamieUK]

A smoother uninterupted less turbulent airflow will improve efficiency and should improve accuracy from shot to shot.

You are kind of right but there is nothing wrong with the FX probe as is and it works fine with the way the transfer port is bored at 90deg to the barrel from the factory.

I may be wrong but I think it would increase production costs if FX had to machine the TP ( primary mod) as per the suggested mod on here, and could have been viewed as an inefficient use of labour (for a 4 to 5% gain on an already great gun).

However only once a user has done the mod to the TP ( primary mod) it then opens up potential in the probe for a secondary mod ( a bit like tuning an engine, no point polishing and porting your fuel and air intake/ without opening up your exhaust to maximise flow out, and vice versa)

Hope that makes sense.....

 

[JamieUK]

Powerbroker

Honestly (and I may get shot down for this) but you dont need to go to town on your transfer port like like a lot of people have done to get a big increase. I have seen a few posts where people have totally butchered theirs.

I seated a pellet, flowed the internal 90deg edge of the port leading into the rear of the pellet with a dremel/ carbide bit and then polished with fine wet and dry paper wrapped around a 3mm drill bit.

This alone took 15 minutes and resulted in a 40fps increase (which equated at the time to a 5% increase)

With your set up at 880fps you may see 45fps....

If you go steady and are capable it really is the best free mod you can do (assuming you already own or can borrow a dremel)

Thank you but I don’t have steady hands..

Fair enough, but it really isnt so bad.

Here is mine.....

 

[Powerbroker]

Powerbroker

Honestly (and I may get shot down for this) but you dont need to go to town on your transfer port like like a lot of people have done to get a big increase. I have seen a few posts where people have totally butchered theirs.

I seated a pellet, flowed the internal 90deg edge of the port leading into the rear of the pellet with a dremel/ carbide bit and then polished with fine wet and dry paper wrapped around a 3mm drill bit.

This alone took 15 minutes and resulted in a 40fps increase (which equated at the time to a 5% increase)

With your set up at 880fps you may see 45fps....

If you go steady and are capable it really is the best free mod you can do (assuming you already own or can borrow a dremel)

Thank you but I don’t have steady hands..

Fair enough, but it really isnt so bad.

Here is mine.....

Convincing. I might try it.

 

[Powerbroker]

A smoother uninterupted less turbulent airflow will improve efficiency and should improve accuracy from shot to shot.

You are kind of right but there is nothing wrong with the FX probe as is and it works fine with the way the transfer port is bored at 90deg to the barrel from the factory.

I may be wrong but I think it would increase production costs if FX had to machine the TP ( primary mod) as per the suggested mod on here, and could have been viewed as an inefficient use of labour (for a 4 to 5% gain on an already great gun).

However only once a user has done the mod to the TP ( primary mod) it then opens up potential in the probe for a secondary mod ( a bit like tuning an engine, no point polishing and porting your fuel and air intake/ without opening up your exhaust to maximise flow out, and vice versa)

Hope that makes sense.....

I does make sense. Thank you.

But the PP is more costly than modifying the transfer port. 5% of 900 is equal 45fps added speed. That is a huge effect for a struggling fx to reach 920fps. 

 

[Powerbroker]

The new cal .35, i understand (i maybe wrong), has a modified hammer spring and hammer weight but there is no mention of modification on the valve transfer port. I don’t think the “added cost” is the reason FX keeps the old transfer port as is.

 

[Glem.Chally]

The new cal .35, i understand (i maybe wrong), has a modified hammer spring and hammer weight but there is no mention of modification on the valve transfer port. I don’t think the “added cost” is the reason FX keeps the old transfer port as is.

The porting in the gun is .30 size as far as i know so going bigger for .35 is pointless. I thought just a bigger hammer weight not different spring. Could be wrong though. 

 

[JamieUK]

The new cal .35, i understand (i maybe wrong), has a modified hammer spring and hammer weight but there is no mention of modification on the valve transfer port. I don’t think the “added cost” is the reason FX keeps the old transfer port as is.

The port is already bigger ( than a .22/ .25), the larger the calibre the less restriction there is (to start with)....

 

[GQ]

The hammer, the hammer weight are exactly the same in the .35 caliber power plenum kit. But they use the 57 mm original hammer spring.

The barrel is 800 mm

The air bottle is 580.

And there is no other modifiactions.

This information is coming from a famous guy at FX USA.

 

[JamieUK]

A smoother uninterupted less turbulent airflow will improve efficiency and should improve accuracy from shot to shot.

You are kind of right but there is nothing wrong with the FX probe as is and it works fine with the way the transfer port is bored at 90deg to the barrel from the factory.

I may be wrong but I think it would increase production costs if FX had to machine the TP ( primary mod) as per the suggested mod on here, and could have been viewed as an inefficient use of labour (for a 4 to 5% gain on an already great gun).

However only once a user has done the mod to the TP ( primary mod) it then opens up potential in the probe for a secondary mod ( a bit like tuning an engine, no point polishing and porting your fuel and air intake/ without opening up your exhaust to maximise flow out, and vice versa)

Hope that makes sense.....

I does make sense. Thank you.

But the PP is more costly than modifying the transfer port. 5% of 900 is equal 45fps added speed. That is a huge effect for a struggling fx to reach 920fps.

Im on board with what your saying PB, and genuinly I understand your frustrations, but you need to take a look back and consider the evolution of the Impact over the last few years.

The .25 was initially designed to shoot the 25.4gr at its optimum velocity of between 880 to 920, which it did very well, with a high shot count, with the standard plenum and unmodified TP.

Despite not being able to keep up with demand they have still continued to push things foward, and provided upgrade after upgrade ( which are compatible with every generation of Impact no less)

Im not sure it makes sense for them to modify their production lines/ equiment/ plc programs to suit the probe mod that is only beneficial to a couple of the calibres from their range...?

 

[Glem.Chally]

The hammer, the hammer weight are exactly the same in the .35 caliber power plenum kit. But they use the 57 mm original hammer spring.

The barrel is 800 mm

The air bottle is 580.

And there is no other modifiactions.

This information is coming from a famous guy at FX USA.

In the release video by Jon, he mentions a heavier hammerweight.

Around the 1:25 mark he says it.

https://youtu.be/ER3UdO_fNaU

 

[GQ]

The hammer, the hammer weight are exactly the same in the .35 caliber power plenum kit. But they use the 57 mm original hammer spring.

The barrel is 800 mm

The air bottle is 580.

And there is no other modifiactions.

This information is coming from a famous guy at FX USA.

In the release video by Jon, he mentions a heavier hammerweight.

Glem I know he did say that.

I have ask Ernest and he told me no, the hammer weight is the same. 

Just the hammer spring is 57 mm (like the original) instead of 53 mm.

 

[Powerbroker]

A smoother uninterupted less turbulent airflow will improve efficiency and should improve accuracy from shot to shot.

You are kind of right but there is nothing wrong with the FX probe as is and it works fine with the way the transfer port is bored at 90deg to the barrel from the factory.

I may be wrong but I think it would increase production costs if FX had to machine the TP ( primary mod) as per the suggested mod on here, and could have been viewed as an inefficient use of labour (for a 4 to 5% gain on an already great gun).

However only once a user has done the mod to the TP ( primary mod) it then opens up potential in the probe for a secondary mod ( a bit like tuning an engine, no point polishing and porting your fuel and air intake/ without opening up your exhaust to maximise flow out, and vice versa)

Hope that makes sense.....

I does make sense. Thank you.

But the PP is more costly than modifying the transfer port. 5% of 900 is equal 45fps added speed. That is a huge effect for a struggling fx to reach 920fps.

Im on board with what your saying PB, and genuinly I understand your frustrations, but you need to take a look back and consider the evolution of the Impact over the last few years.

The .25 was initially designed to shoot the 25.4gr at its optimum velocity of between 880 to 920, which it did very well, with a high shot count, with the standard plenum and unmodified TP.

Despite not being able to keep up with demand they have still continued to push things foward, and provided upgrade after upgrade ( which are compatible with every generation of Impact no less)

Im not sure it makes sense for them to modify their production lines/ equiment/ plc programs to suit the probe mod that is only beneficial to a couple of the calibres from their range...?

You could be right. 

 

[Powerbroker]

I may look frustrated with FX design but i still trust and believe the engineers of FX and their official publications. They have too much to loose than to gain if they misrepresent. It is what it is and get the best out it.

 

[Drumsnguns]

I'm getting a bit confused here...and would like to know what EXACTLY I have in my Impact which I got maybe 3 weeks ago. 

Does my Impact MK2, w Power Plenum have a hammer weight?

What spring is in this Impact? I was under the distinct impression that they come with the 52 or 53 mm.

I suppose I could tear it apart but I really don't want to have to do that.

Thanks

KP

 

[GQ]

I'm getting a bit confused here...and would like to know what EXACTLY I have in my Impact which I got maybe 3 weeks ago. 

Does my Impact MK2, w Power Plenum have a hammer weight?

What spring is in this Impact? I was under the distinct impression that they come with the 52 or 53 mm.

I suppose I could tear it apart but I really don't want to have to do that.

Thanks

KP

Yes there is a hammer weight.

The spring is 52-53 mm

 

[Drumsnguns]

Thanks GQ!

 

[GQ]

Thanks GQ!

The best is the original 57 mm hammer spring.

 

[Powerbroker]

To those who intends to buy an fx impact, test the gun first with max preload and max reg pressure at 150 bar with your choice of pellet or slug weight. 
Those youtube videos will make you expect too much and end up tearing your gun apart for modifications. 

 

[GQ]

To those who intends to buy an fx impact, test the gun first with max preload and max reg pressure at 150 bar with your choice of pellet or slug weight. 
Those youtube videos will make you expect too much and end up tearing your gun apart for modifications.

Why dont you stop you negative comments my friend. I understand it is frustrating for you but I am 100% sure you dont know exactly how to fine tune your Impact.

Many members here who are not on Youtube and they get fantastic results and they dont feel to publish here because they dont have time to do this.

Sen your Impact to a professional and let him fine tune it properly.

Or do something like an adult and get it done.

Wish you the best

Regards

 

[Powerbroker]

To those who intends to buy an fx impact, test the gun first with max preload and max reg pressure at 150 bar with your choice of pellet or slug weight. 
Those youtube videos will make you expect too much and end up tearing your gun apart for modifications.

Why dont you stop you negative comments my friend. I understand it is frustrating for you but I am 100% sure you dont know exactly how to fine tune your Impact.

Many members here who are not on Youtube and they get fantastic results and they dont feel to publish here because they dont have time to do this.

Sen your Impact to a professional and let him fine tune it properly.

Or do something like an adult and get it done.

Wish you the best

Regards

My friend, stop pretending you know better than me. Go get one and show me. You rely on purw hearsay. Gossip will not help you. Out of respect, i will not say you walk the talk again