FWB Wanted - FWB Sport Tune details and results

[Kragman1]

Hi all

First off - this thread is about the modern FWB Sport, not the classic 124/127 rifles.

Since there are few Sports but many that needed a tune when new (and because I'm about to tune one...) I'd like it if those who have already been down this road would list what they did/compo ents used and what the final results were.

I'm going to make up a spring guide for both the OEM spring anI for a Titan #1 spring, and use a Vortek piston seal. I'll start with the Titan spring as it should shoot much softer, though I'm hoping that I don't drop below 12fpe. I may. As it is (stock everything) it's harsh and extremely hold sensitive.

If that doesn't do it for me, I'll go back to the OEM spring but with a tight spring guide.
I know that many have clipped a couple of coils from the OEM spring, and I'm guessing the #1 won't be too much different than that.

Thanks in advance!

 

[Sqwirl57]

Factory spring and lose a coil and you'll be right around 13fpe. I've actually debated going back to a full length spring and installing an HW80 short stroke piston seal. It should soften it up quite a bit while still maintaining 12ftlbs. I havent experimented with that yet. I just thought it was worth mentioning

 

[Richely]

Hi all

First off - this thread is about the modern FWB Sport, not the classic 124/127 rifles.

Since there are few Sports but many that needed a tune when new (and because I'm about to tune one...) I'd like it if those who have already been down this road would list what they did/compo ents used and what the final results were.

I'm going to make up a spring guide for both the OEM spring anI for a Titan #1 spring, and use a Vortek piston seal. I'll start with the Titan spring as it should shoot much softer, though I'm hoping that I don't drop below 12fpe. I may. As it is (stock everything) it's harsh and extremely hold sensitive.

If that doesn't do it for me, I'll go back to the OEM spring but with a tight spring guide.
I know that many have clipped a couple of coils from the OEM spring, and I'm guessing the #1 won't be too much different than that.

Thanks in advance!

I’d start with Vortek seal and full factory spring with your custom guide. You might be surprised with just that.

I replaced flat-faced factory seal with concave-faced Vortek seal. That change alone eliminated harsh stop to piston travel. Only other change was to tar original guide and that eliminated buzzing (for now). Quite pleasant to shoot, steady for a springer off a soft rest. Getting 14 fpe.

With custom guide you should be smoother still. Start minimal changes and evaluate. Change something else only if needed. Make a number of changes at once you really don’t know what added and what subtracted from what you are after.

 

[PaulK62]

I’d start with Vortek seal and full factory spring with your custom guide.

My Sport shot fine out of the box. But for future reference, which Vortek piston seal fits the Sport?

 

[Richely]

My Sport shot fine out of the box. But for future reference, which Vortek piston seal fits the Sport?

HW80R1 Piston Seal 30MM

Vortek precision machined seal for Weihrauch/Beeman HW80-HW90 and some Theobean Airguns CNC precision machined High-Temp Molybdenum Disulfide blend polyurethane.Permanently Lubricated: Manufactured from a high-temp Molybdenum Disulfide, impregnated Urethane cast bar material. Sized and...

vortekproducts.com

Vortek on left, original on right. Original shows signs of impact at end of stroke.

 

[GoldenStateAIRGUNer]

Depending on how the seal sits on the piston it looks like the Vortek has a deeper valley which
may eliminate the piston slam marks.

 

[Richely]

Depending on how the seal sits on the piston it looks like the Vortek has a deeper valley which
may eliminate the piston slam marks.

Haven’t disassembled to look nonetheless harsh piston stop with original, not so with Vortek. Seal height at lip same as original with face of Vortek recessed, also much tighter push-on fit to piston. The concave face does make a difference. Not sure how the lip will hold up taking the brunt. Doing well so far after 1200 rounds. Will have to see how long it lasts.

 

[GoldenStateAIRGUNer]

Haven’t disassembled to look nonetheless harsh piston stop with original, not so with Vortek. Seal height at lip same as original with face of Vortek recessed, also much tighter push-on fit to piston. The concave face does make a difference. Not sure how the lip will hold up taking the brunt. Doing well so far after 1200 rounds. Will have to see how long it lasts.

Did you do any size fitting on the piston seal ?

 

[ChuckHunter]

Did you do any size fitting on the piston seal ?

No need to fit a vortek seal just shoot it and it conforms to the tube and breaks in nicely!
Moly impregnated material.

 

[Richely]

Did you do any size fitting on the piston seal ?

As ChuckHunter says no sizing to cylinder needed. Seal is stiff though and a tight fit onto the piston itself. Warming the seal in very hot water makes it momentary more pliable and easier to install.

 

[TnCnDn]

Any Sport owners having safety issues?

 

[Duckfish]

I sent one to a tuner in Texas (Ed K), took along time with it . Didn’t seem to make much difference.

 

[Frank in Fairfield]

DITTO

 

[DonC]

My first FWB had a trigger problem. Retyrned it and they were out of stock and discontinued model. Finally found one from Flying Dragons. Mike/owner sold them tuned with new spring guide. All elso was original. Wow what a difference. Now my favorite break barrel and looking for another.

 

[Michigander]

Mine developed a trigger reset problem. Contacted FWB and they arranged warranty repair. Came back better than new. Now my favorite springer for shooting outdoors.

 

[Kragman1]

Well, I still haven't done anything with mine (though it shoots pretty well as is). I do have possession of a delrin spring guide made from posted dimensions to fit an original spring, and another guide to fit a Titan spring. No tophat made up, hoping not to need one.

Hopefully I can get to the FWB soon...

 

[TnCnDn]

I had my safety removed. Now the forend has warped and putting preasure on the breech block. Takes time that I do not have right now to fix. If I would have known what I know now .... well you know the of the story. Oh well.

 

[TnCnDn]

I had my safety removed. Now the forend has warped and putting preasure on the breech block. Takes time that I do not have right now to fix. If I would have known what I know now .... well you know the rest of the story. Oh well.