Vortek for the B26-2 Small Chamber?

[shady816]

i had some two part epoxy left from my model airplanes that i used it has a 30 minute set time and when cured the only way to remove is by sanding it off be carful that what you use does not melt your buttons most instant glues contain a cemical that will melt plastic and such at first contact.

[DMikeM]

I have some of that from doing the stock repairs, 5 minute 2 ton epoxy. I will order the stuff from JM today. At least I will have it next week to fool around with. Hey since my guns and yours are the same size compression tubes would you still need the action to mil those delrin parts or or would you be able to duplicate what your made for your gun? If so maybe we should talk price if you are still willing to fabricate me a couple of kits.

[shady816]

i would have no problem fabing you some guides but unfortunatly i did not write anything down for measurements i just keep measuring and machining one piece at a time so i would have to dissassemble mine and remeasure it all which i guess i could do since it would only require pulling the spring out and as far as price just cover the shipping and that would be good i have no issues with helping out.

[DMikeM]

I wouldn't want you to put yourself out having to tear your gun down yet again. But if you had plans to do so in the future I could wait.
As for cost of shipping no trouble at all I could send you a UPS label or payal you the shipping cost or COD or whatever is easiest. I also could just have you use my shipper number for UPs and it would just be charged back to me.

So let me know and I do really appreciate the help and such.
thanks

[DMikeM]

Well the spring, seal and buttons should be at the post office today.
I changed the seal already once last weekend using the larger seal that Mike had sent me only I sanded it down just a little so it would fit. During this procedure I found that there is a large gouge in the compression tube that I assume happened when the spring broke. So I went and got a cylinder hone and smoothed things out as much as I thought was safe. Still no joy on the power of the gun, but it sure shoots like a dream now just a good solid thump no crunch, buzz or twang at all. If I cannot resolve the power issue with the new spring and seal I will just use it for light shooting and get a new .22 cal springer. I think that gouge is killing my compression.

[shady816]

have you chrony tested the fps to see just how down on power it may be because mine i thought was down due to it being so pleasent to cock and shoot only to shoot it across the chrony with my other guns to find that it was my most powerful even up against my gas ramed hunter but not by much though my hunter will out shoot it on the targets all day long.

[DMikeM]

shady816 - 4/21/2010  3:32 PM

have you chrony tested the fps to see just how down on power it may be because mine i thought was down due to it being so pleasent to cock and shoot only to shoot it across the chrony with my other guns to find that it was my most powerful even up against my gas ramed hunter but not by much though my hunter will out shoot it on the targets all day long.

I have not run it over a chrony, but will have the chance this weekend I think. My test is to shoot at a bottle cap at 10 yards or less and see if it penetrates. My RWS M34 does it fine and my B26-2 .22 used to before the spring broke, now it does not penetrate. My B26 .177 will penetrate at 30 yards.

[DMikeM]

Installed the new seal and spring from JM, it was much longer than the one I got from Mike. I also buttoned the piston. Got it all back together and the shot is awesome. It feels really solid no vibration or any twist. Shot some bottle caps and to my disappointment they still don't penetrate. But just for good measure I got out the RWS 34P and tried the same shot and it also did not penetrate, I found that both guns would penetrate the caps on the second shot where the cap was bent and closer to the wood backing. I am now thinking there was nothing wrong with the B26-2 but it was just the holes I set the caps in became so distorted that the caps gave in instead of holding tight for the pellet. Hopefully I will have the chrony this weekend to test out both guns again.
It sure shoots nice though, can't wait for this snow storm to clear out so I can do some yard shooting again.

[DMikeM]

speedturtle - 4/3/2010  5:24 PM

Not 70 but 20FPS. That is using RWS superdomes 8.3 grains pellets.

Here are some data that might be of use to you:

Stock B26 Piston Spring:

Uncompressed length: 11.5"
Wire Thickness: 0.118"
Spring O.D.:   0.73"
Spring I.D.:   0.481"
Number of Coils: 40

------

B26 Replacement Piston Spring (From MM):

Uncompressed length: 11"
Wire Thickness: 0.118"
Spring O.D.:   0.728"
Spring I.D.:   0.467"
Number of Coils: 37

-------

Crosman Quest Piston Spring:

Uncompressed length: 10.25"
Wire Thickness: 0.123"
Spring O.D.:   0.731"
Spring I.D.:   0.484"
Number of Coils: 36

Hope this helps. The B26/Crosman Spring combo shoots hard as in hard but not twangy. I said hard because you can feel the recoil considerably but not detrimental to its innate accuracy. Just a straight thud on your shoulder but without the tendency to twist on your open palm. I put a custom delrin top hat to it courtesy of a very generous airgunner friend. You can try it if you want. The Crosman spring is cheaper and I have a spare that is why I decided to play around with it when the stock B26 spring gave up on me. If you want a more solid rear spring guide you can actually use the Crosman Quest rear spring guide on the B26 but you have to leave out the heavy additional preload metal part and you have to file away some parts on the rear of the guide until it is about 3/16" thick.

This is my chrony data for the B26/Crosman piston spring setup:

Lo - 892.5 FPS
Hi - 909.8 FPS
Ave - 900.1 FPS
ES - 17.37
Sd - 7.00

10 shot strings

10 - 892.7
9   - 909.8
8   - 892.5
7   - 896.5
6   - 909.3
5   - 894.1
4   - 903.0
3   - 895.8
2   - 908.1
1   - 899.5

Hey Speedturtle, where did you get the Crosman Quest Spring and Guide? I would like to try this combo out on my .177 B26. This weekend I replaced the factory spring with the RWS 320 spring Mike sent me, this spring shoots real nice but I would like to see a few more FPS out of this gun if I can get them. If this works well in the .177 it may be worth it to try in the .22 B26-2.

[shady816]

did you try the maccari spring yet, just currious to what you got for fps if you did and i will give you some fps numbers this week with mine for my chrony final will arrive tomorrow them suckers were out of stock everywhere. i hate backorder

[speedturtle]

You can buy them direct at Crosman Corp. USA. I think they sell at around $6 - $7 per spring. The rear spring guide is also almost the same price. Worth experimenting, bro.

[DMikeM]

speedturtle - 5/3/2010  3:51 PM

You can buy them direct at Crosman Corp. USA. I think they sell at around $6 - $7 per spring. The rear spring guide is also almost the same price. Worth experimenting, bro.

Thanks. I also sent an email to %%*^(()*)%$*% to see what he says..

[DMikeM]

shady816 - 5/3/2010  3:43 PM

did you try the maccari spring yet, just currious to what you got for fps if you did and i will give you some fps numbers this week with mine for my chrony final will arrive tomorrow them suckers were out of stock everywhere. i hate backorder

Yes I made some spring switches. I will post some number tonight if time permits.

Here are the numbers from last week Chrony 2 foot away. Right now I have given up on the .22 cal. and will be focusing on the .177 for awhile.

My B26 .22 cal
656 with RWS SPHP (original Spring)
570 With RWS SPHP (JM Spring and seal)
580 RWS SPD JM Spring
580 AA Diablo 16 gr
535 with AA Falcon 13.4 gr
565 with CPHP

Bam B26 .177
780 High average medium to light pellets 7.1 to 8.6gr
680 Low average 8.8 to 10.5 gr.

Temps in the middle to high 60s F.

New spring installed over the weekend in .177. will shoot it some more then run a chrony on it. Initial tests were slightly lower over all but climbing as I shot even though I did not remove piston or touch the seal.

[speedturtle]

DmikeM, I saw your post about your FPS data and they seemed to be really low. How about trying it out with the JM spring and the stock piston seal? Is the JM seal too tight? Play around with some washers at the rear of the spring to increase preload if the space can accommodate them. Do you have an specific FPS range goal in mind? Just curious.

[shady816]

your not lacking much there with the 177 mine at my local bow shop was 900 - 889 with 7.9 grain, i think in time yours will pick up but i don't have a .22 to compare. i will put up some numbers this week.