Twisted Tuning N54/N55 HPFP R&D.....

[martymil]

to do a swap to the s55 pumps on a n54 is super costly, absurd amount of money.

The double barrel is here, its reliable, it works and its relatively cheap.

Im all for newer better solutions but from what I seen, it will not be easy to implement the s55 setup

 

[Rob09msport]

What about some type of electric pump setup with controller set on dual hobbs style switch set at like 1600 psi and 10 pounds boost y pipes on feed line and rail inlet then piggy backed on return to stock pump ?

 

[NoQuarter]

If someone is looking at buying new S55 parts the cost is crazy for sure. BMW M tax at it's worst.

However, the pumps can be found used like anything else for a fraction of the cost. I have a set less than a year old for $600.

I have almost everything I need for ~$1200

 

[martymil]

Your lucky you found a set, now imagine when everybody starts looking.

Prices will soar and parts will become scarce, leaving most of us to source new only.

That's only if someone comes up with a solution and get these working in the first place.

Double barrel is here, the install is relatively easy and can be done in 1 day taking your time.

Reinventing the wheel is costly and I hope it makes it to market one day, as it will be a nice solution
to what is/was the flaky orbital pump.

The latest incarnation of the factory pump has been very reliable and hasn't missed a beat, but only time will tell I suppose.

 

[MDORPHN]

Your lucky you found a set, now imagine when everybody starts looking.

Prices will soar and parts will become scarce, leaving most of us to source new only.

That's only if someone comes up with a solution and get these working in the first place.

Double barrel is here, the install is relatively easy and can be done in 1 day taking your time.

Reinventing the wheel is costly and I hope it makes it to market one day, as it will be a nice solution
to what is/was the flaky orbital pump.

The latest incarnation of the factory pump has been very reliable and hasn't missed a beat, but only time will tell I suppose.

I do like the concept of the double (or single) barrel, but am concerned about the longevity of an over-spun pump. Tony tells me it's a non-issue due to the pump's design. What's your take?

Neil

 

[martymil]

My first pump did fail but that was close to 6 years old and my new pump has been running for about a year now.

No issues with the latest design, everything looks great.

I'd be the first one to jump up and down if something was wrong.

With the latest design drive kit, the new hpfp hoses Tony has fixed the issues that where in question in the past.

If @jyamona integrates the second pump control via dme it will be the final piece of the puzzle.

 

[Twisted Tuning]

You guys are more than welcome to make a thread about the double and single barrel. this thread has nothing to do with either, Thanks.

 

[MDORPHN]

You guys are more than welcome to make a thread about the double and single barrel. this thread has nothing to do with either, Thanks.

Fair enough. Apologies!

Neil

 

[Ilkka]

If someone is looking at buying new S55 parts the cost is crazy for sure. BMW M tax at it's worst.

However, the pumps can be found used like anything else for a fraction of the cost. I have a set less than a year old for $600.

I have almost everything I need for ~$1200

Sounds great! What's the other ~600?

 

[Ilkka]

my stuff for the N55 is just about done. took longer than expected. Troubles of being one person doing 100+ things. Then i can move onto finishing the N54 stuff.

N55 pumps are already being worked on being put on the N54 in another thread.

Long story short. N54 and N55 pump setups physically are interchangeable. N55 has a cam sensor for timing injection. Honestly, now with XDI pumps now available for for purchase. running the N55/S55 type setup on the N54 will flow more fuel. The hardest thing for N54/N55 interchangeability is Control. Albeit easier to put the N54 pump on the N55 since the control and functionality is there. But no point in that since XDI has released their N55 pumps.

Nice. Looking forward to the N54 implementation.

 

[MoreBoost]

Well I clearly don't understand all the details here. I'd have thought that increasing the volume of flow would be relatively simple mechanically.
Guess it's not as simple as increasing the sizes of the chambers in the stock pump and using stronger springs.

 

[DennisKing]

Well I clearly don't understand all the details here. I'd have thought that increasing the volume of flow would be relatively simple mechanically.
Guess it's not as simple as increasing the sizes of the chambers in the stock pump and using stronger springs.

no room for the chamber bore to increase. However, if so desired, one could spin it faster, which is what VTT did with the Shotgun setup

 

[NoQuarter]

Sounds great! What's the other ~600?

You need the vacuum pump. As @martymil said, stock parts can get expensive real quick. A new one is ~$400 USD

 

[Ilkka]

You need the vacuum pump. As @martymil said, stock parts can get expensive real quick. A new one is ~$400 USD

Thanks! I'll order it.

 

[MoreBoost]

no room for the chamber bore to increase. However, if so desired, one could spin it faster, which is what VTT did with the Shotgun setup

Yes I noticed that. So I wondered about increasing longitudinal volume. Perhaps a spacer with the 3 holes bored into it and then increase the travel of the pistons.

 

[martymil]

That won't work you would have to make the rotating plate bigger to increase the travel of the spring and move the bores out along with it

Basically a total redesign of the pump itself.

And also the problem is the inlet to the pump its so tiny and if you did redesign the pump the inlet would starve the pump of fuel as you couldn't feed the fuel in fast enough.

It would be cheaper to get a syvecs and an s55 pump setup than to do this.

 

[Erichale77]

What about just increasing the angle of the swash plate?

 

[martymil]

Its already pretty much maxed out, the only real way to increase the stroke is to increase the overall diameter and move the the barrels out towards the edges.

The cost and development would be astronomical and your still limited by the inlet size of the pump on the lpfp side.

I can't see this ever happening unless the manufacturer done this, but again this will never happen as the n54 market now is just way to small for such a hefty outlay, you would need at least 10000 pumps for them to even consider it but more likely 100k to make it worth while.

 

[Ilkka]

my stuff for the N55 is just about done. took longer than expected. Troubles of being one person doing 100+ things. Then i can move onto finishing the N54 stuff.

N55 pumps are already being worked on being put on the N54 in another thread.

Long story short. N54 and N55 pump setups physically are interchangeable. N55 has a cam sensor for timing injection. Honestly, now with XDI pumps now available for for purchase. running the N55/S55 type setup on the N54 will flow more fuel. The hardest thing for N54/N55 interchangeability is Control. Albeit easier to put the N54 pump on the N55 since the control and functionality is there. But no point in that since XDI has released their N55 pumps.

How do the XDI and S55 pumps compare to the stock N54 pump? Are the options from the lowest to the highest flowing 1. XDI-35, 2. XDI-60 3. 2xS55 4. 2xXDI-35 5. 2xXDI-60? How does stock N54 compare to the above?

 

[martymil]

That would be for someone that done flow testing on these but they get controlled very differently by the dme so a total rewrite of the fuel system control would be needed

But from what Tony was saying in another thread the stock s55 setup is only good for around 600hp and a single shotgun is good for 550hp

Im only guessing around 450hp for a stock orbital pump in the stock location