Extremely LOW FPS

[Styrak]

Originally Posted by turok_t

So after lots of testing, I finally found why my FPS is soo low. Based on my experience, let me get one thing straight-- Prometheus springs are complete crap and are inconsistent. I had a MS110 which was waay stiffer than MS120. I ended up buying a Modify MS120 spring. Im beginning to really like Modify components as the material is more sturdy (fire selector and tappet plate), much thicker, and waay cheaper. The Modify fire selector and tappet plate I got definitely surpasses the ones made by Prometheus.

Prometheus MS110 with 0.20g / 0.25g bastards

352 / 353
363 / 324
356 / 330
357 / 325
356 / 325
359 / 324
357 / 325
356 / 326
358 / 329
361 / 356

Prometheus MS120 with 0.25g bastards

324
322
321
310
326

Modify MS120 with 0.20g / 0.25g bastards

408 / 362
416 / 365
409 / 366
415 / 372
415 / 370
413 / 371
422 / 368
416 / 376
379 / 372
379 / 371
377 / 370
379 / 378
380 / 379

So as you can tell from my results, the Modify MS120, really pushed the FPS alot. Im thinking about getting a Modify MS110 as the FPS on my gun is too hot at the moment.

Considering the Modify S120 spring is supposed to be shooting 440, no, you still have your fps problem/airleak.
And Prom springs are very good, you shouldn't be badmouthing them because of your (obviously) incorrect conclusions.

[HKGhost]

I would agree with Styrak. A Modify M110 should be ~400fps and M120 is ~440fps. So you are still having problems with your setup.

[cjboi]

I prefer Prometheus springs over Modify springs. I have better results with Prometheus (consistent) than the modify springs I've had.

[turok_t]

Ive been advised by one of the known/highly recognized member on ASC members to disregard Styrak's comments, so I will continue to ignore him and his unconstructive comments. Happy halloween everyone! Thanks again for those who have helped me and contributed (positively/constructively) to this thread!

[Renegade)]

You know... Ive been using a Prometheus MS120 for a couple years now, and I always noticed my gun chronied well under what it should... Now I figured there was a small airleak between the meshing of the hopup unit and mechbox, and I have a silent kit in there, which drops the total FPS a bit. AND the gun always shot amazing so I never really cared you know?

But seeing this, makes me think its just the Promy spring in there dropping it... Something to ponder when I get a chrony, I can try some spring swaps and confirm... Interesting

[turok_t]

Originally Posted by Daiviet

wow. Considering he's probably worked on more guns in the past month than you've worked on your life, you probably should be taking his advice.

He's being nice and telling you that you STILL have an airleak problem with your gun, and instead of just quietly ignoring his advice, you're going to single him out and tell him his advice is useless.

remind me to never help you if you ask a question.

There is a difference between answering someone's question, and answering it in a way that is not conducive or constructive at all. For example, your response compared to him is much more positive/constructive. You think that hes been "nice", but if you look at his other responses to my threads in the past, its always the same attitude/condescendence he portrays. This is not an isolated incident, there's many incidences involved. I've never said I was better than him at all! Dont mistaken me, but I have been personally collaborating with other gun docs silently away from ASC. And believe, Ive been silently ignoring him for the past 3 times in my previuso posts. I just didnt say nething.

[Amos]

Styrak's post isn't being de-constructive or anything like that here.

Modify springs shoot quite a bit harder than what their rated for.

Also.. Stop chasing the perfect FPS lol. You wont notice the difference between 380 and 400 FPS., get out to a game with the gun, shoot it, and if it's nice... Good enough.

[yuhaoyang]

^^^
this.
and +1 to daiviet.

[turok_t]

Finally found my airleak after hours of researching and testing. Here are my final results:

0.25g / 0.20g BBbastards with Modify MS120 spring:

395 /443
399 / 443
395 /430
394 / 436
391 / 431
389 / 430
388 / 432
397 / 437
389 / 436

My next thing is to get a new cylinder head with double O-rings and that should be it.

[HKGhost]

I'm just curious, what was the cause of the air leak?

[turok_t]

air was leaking from the hop up rubber.. so i used teflon tape to seal it and my FPS went straight up. however, this only worked for my longer barrel KM 6.0mm 469mm inner barrel. For my prometheus 6.03mm 363mm barrel, FPS remained the same (described several posts above) even with the teflon tape mod. I guess having a longer barrel really increases your fps alot, well at least, in my case it did.

[fi3re]

would you mind elaborating on how the rubber was leaking? And the teflon tape mod? just for future reference for me

[turok_t]

Originally Posted by fi3re

would you mind elaborating on how the rubber was leaking? And the teflon tape mod? just for future reference for me

This is exactly what I did:

YouTube - Uszczelnienie teflonem - teflon fix /