Any theories as to why some implants take way more pumps than others ?

[tomas1]

Just curious, but at your max pumps do you just stop, or does the pump say "no mas"?
I can get to full size at 10 pumps, but can keep going a lot more.

I think with the damned RTEs, I want it stiffer to stop the wobble.

[Evinrude]

Just curious, but at your ax pumps do you just stop, or does the pump say "no mas"?
.

5 pumps seem to get me as large and rigid as it’s going to get. I can “sort of” do 2 or 3 partial squeezes beyond 5 but can’t tell any difference in size or rigidity (measuring, not just looking)

[SeaCapt]

I'm new at this, but yesterday I used 5 solid pumps- like complete compression of the pump, and I could feel it drawing in lots of saline when I released it.
Today, after the first hard pump to activate, I went to do the 2nd pump and it slipped out from my fingers, smacking my nut- ouch!
So I then pumped little compressions so it wouldn't slip again, and it took 20 pumps to get to the same place as yesterday.
Maybe it's less science and math, and just simply how how much saline you move with each pump...

[merrix]

But only the size makes huge impact. Let's compare an 18 cm AMS and a 24 cm Titan.
The AMS will have 13 cm inflatable length, the Titan will have 19 cm.
AMS 18 cm diameter is 16 mm and Titan diameter is 23 mm (according to some old notes I made, not 100% sure what the source is). Radius is 0.8 cm and 1.15 cm.
Volume in two cylinders are:
AMS: 3.14*0.8*0.8*13*2=52 ml.
Titan: 3.14*1.15*1.15*19*2=157ml.

So, the 24 cm Titan will need 3 times as much saline to get full as the 18 cm AMS does. Couple that with potential causes like difference in preferred hardness, different starting point, and we can easily get to 5 times the difference in number of pumps to get "full", which is a subjective measurement. What is full depends on preference, hand strength etc.

Yeahbut...comparing two AMS 700 LGX....mine 15cm, another member (Hrc714) 24cm....both 12mm diameter (both 18mm inflated)

15 is 1.6 ratio to 24. (RTE's a moot point for this as we're comparing cylinder volumes)

I take 5 pumps, so... his should take 8 pumps. His actually takes 50 pumps !

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(inversely if his take 50, mine should take 32 ! It's this extreme difference between same make, model and diameter that has me mystified)

I am not talking about RTE's. I am talking about the fixed, uninflatable part which each implant of each brand has. That is just how they are designed. If there was no fixed part, only inflatable cylinders, no doctor could insert the implant way back in your crus. Both brands have 4.5-5.0 cm of fixed uninflatable parts.
So if you compare your 15 cm AMS to his 24 cm AMS, the ratio is not 1.6.
The 15 cm AMS has 10 cm cylinder lengthe which actually gets filled with saline.
The 24 cm AMS has 19 cm.
So the ratio is 19/10=1.9.

This alone still doesn't explain the difference in #of pumps betweeen the two of you.
But as said, there are many other variables which could explain this.
I cannot avoid thinking that 5 pumps can never be totally full.

My implant is much larger than yours, but after 5 pumps, I cannot even notice any difference. The angle doesn't change 1 degree with 5 pumps.
If I want a fuller flaccid in my jeans, I will do around 7 full pumps.
I need around 10 full pumps to get it full, then the angle is still 4-5 o'clock.
At around 20 full pumps it is up to 3 o'clock, but not hard enough for penetration.
To get it to point to 2-2:30 and be what I would call "rock hard", I need around 70 pumps of gradually lesser size, as I cannot squeeze it wall-to-wall once it gets closer to full.

And I am 100% sure my hand strength is not the problem. I can deadlift 440 pounds without straps.

[regor1965]

When I went for my consult Tues 8/13/19 the Uro stated if he could create the best implant it would be the Titan with the AMS pump (hope that is correct very new). He said he uses the older style Titan pump not the latest one. You guys have a lot more experience with this, brand names etc.. just wondering if anyone else has heard of this. He stated he has performed about 500 of these.

[Piddlin]

Hey guys apparently I am the odd man out with the 50 pumps. I do complete compression with each pump and pump until the pump won't re-inflate (resoviour empty). I think the factor is the penis tissue itself. Prior to my implant I was rather large and use the VED right up the day of surgery. With that said I really thing the elasticity of the penile tissue and the resistance it creates against the implant. If the space is smaller where the cylinders are smaller it will take less volume to bring you to your full size regardless of your size. On the other hand the greater the space the more it will take to fill it regardless of your overall size.

TIme to pump, bout a minute or two depending on what else is going on

Best

[Evinrude]

Hey guys apparently I am the odd man out with the 50 pumps. I do complete compression with each pump and pump until the pump won't re-inflate (resoviour empty).

OMG...50 with complete flattening of the pump bulb each squeeze ? Guess it would be worth the extra tedium if my unit was larger ! Still, hard to wrap my head around the extreme differences in pump numbers with little 'ol me and some of you guys... 5 versus 15 would make some sense, but 5 versus 50 is most curious...

[Piddlin]

Ok now you guys got me wondering what is going on here. I can see the reservoir in my abdomen; its above the muscle. It is oblong shape. Best I can measure 5" long by 2" wide, and at least an inch thick (can't really measure that, just feel it). AMS, to my knowledge makes 2 sizes, 65 ml and 100 ml. I am sure that it is at least 100 mls. I have worked with surgeons that have intentionally overfilled implants of all types to get the desired effect. Now wishing he would added even more Based on the "test" pump I was given, it probably moves about 2cc per pump (yeah, I took the sample apart). 2CC x 50 pumps would add up. Only thing I can figure for the disparages is the volume that was place in the reservoir.

[Evinrude]

Today I had routine visit at Mayo Clinic with my surgeons "activation" specialist. He seemed super knowledgable and answered many curiosity type questions I've had... one of which concerned the point of this topic.

When I mentioned how strange it seemed that some guys felt the need for 30 to 50 pumps he replied "yeah, we've heard that too but frankly in all these years with hundreds of implants of both AMS and Coloplast we're never seen the need for more than 14 pumps !"

To which I asked...you mean even on the largest sizes ?? "Yes, even on the largest sizes. All we can figure is they aren't doing full squeezes...perhaps a lot of 'baby' pumps"

This may cause a ruckus with you 50 pump guys but that's what he said

(FWIW, he max pumped me for activation.... and since he pumped harder than I do it only took 4 pumps ! )

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He also had some very interesting comments about AMS LGX and the 20% size increase thing.... will start another topic here about that when I have time...

[merrix]

Today I had routine visit at Mayo Clinic with my surgeons "activation" specialist. He seemed super knowledgable and answered many curiosity type questions I've had... one of which concerned the point of this topic.

When I mentioned how strange it seemed that some guys felt the need for 30 to 50 pumps he replied "yeah, we've heard that too but frankly in all these years with hundreds of implants of both AMS and Coloplast we're never seen the need for more than 14 pumps !"

To which I asked...you mean even on the largest sizes ?? "Yes, even on the largest sizes. All we can figure is they aren't doing full squeezes...perhaps a lot of 'baby' pumps"

This may cause a ruckus with you 50 pump guys but that's what he said

(FWIW, he max pumped me for activation.... and since he pumped harder than I do it only took 4 pumps ! )

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He also had some very interesting comments about AMS LGX and the 20% size increase thing.... will start another topic here about that when I have time...

First of all, no offence to you Evinrude. I am just writing this because I think it is something that has to be said, be straightened out.

This content of your post is utter bullshit. Simple as that. There is no #¤&#& way that no implant, regardless of size, never needs more than 14 pumps. I am living proof of that, and so are several others here.
If I do 14 full pumps, squeezing my pump till it collapes wall to wall, I will not even get hard enough to penetrate. I will get a semi of the kind I had before surgery.

And let us do the maths to prove this point as well. Take my implant, a 24 cm Titan as the example:
Cylinder length: 24 cm
Inflatable cylinder length: 24-5=19 cm.
Diameter: 23mm
Volume: 3.14*1.15^2*19*2=158 ml (=cm^3).

Obviously this calculation is too theoretical, and the fact is that the maximum size reservoir is 125 ml.
So let us use 125 ml.

How many pumps do you need to do to move 125 ml?
Well, one simple way to test is to take a Titan pump, fill it with water, pour the water into a container and repeat till you have got to 125 ml...

I did this. It took me 40 full pumps to get to 100 ml, meaning one pump contains 2.5 ml of water/saline.
That would mean that a full reservoir of 125 ml would take 50 pumps.
I don't know how much saline Eid actually filled my 125 cc reservoir with, but since there are two sizes, 75 cc and 125 cc, we can assume that some cylinder sizes do need more than 75 cc. If not, there would be no 125 cc reservoir on the market...

I also do know that Eid does underfill reservoirs to the exact amount needed, to make the reservoir as small as possible and minimize the risk for autofill. But still, if he would only put <75 cc in the reservoir, he would have chosene the 75 cc model, not the 125 cc.
So we can assume I have anywhere between 75 and 125 cc.
Let us assume 100.
That takes 40 theoretically perfect pumps. Something you will never achieve in real life, no matter if you press wall to wall.
And this correlates very well with my experience.
I can do around 30 wall to wall and then another ~30 gradually smaller pumps as the resistance increases.

14 pumps would be maximum 14*2.5=35 ml of saline. That is less than half the size of the smallest Titan reservoir.
So what you say is completely impossible. Period.

So for you to say that nobody ever needs more than 14 pumps is just utter BS.
Either the guy who told you this simply doesn't have a clue.
Or you misunderstood him.
Or you deliberatley spread misinformation (quite unlikely, though theoretically possible)
Or the guy who told you didn't want to hurt your feelings by making you realize that what you call a rock hard dick is in reality just a semi filled implant, and some guys can inflate it way more.
Or... there are surely several other possible explanations as well.

But facts are you are wrong.
Go ahead and make the same experiment yourself and let me know your results...
And if you don't bother, please explain where my logic fails.