IP Limit

[DVST8R]

This is a IDI and TDI, post, I am not posting this yet over @ tdiclub.com, for a few reasons, but lest discuss here.

We seem to be hitting the limit of the known IP's (Injection Pumps) there have been a number of posts of seized pumps, and a number more I'm sure that go unreported.

The VE has some nice fetures such as dynamic timing adjustment, but also seems to have some severe RPM limits with big heads and agressive fuel plates. Now we obviously to this point have more then enough fuel for the IDI, as PCP's seem to be limiting that i the form of the head lifiting, but I wonder if some of this could be aliviated if we pushed the rpm band out some, and kept the fueling limited till we get out there some. I know that we still have some work to do on the sealing of the head regardless, but it is just a thought.

Now if we are talking about the TDI, fueling is very much at the limit. 11mm pumps and r520's are not enough, it barely keeps up with VNT20's let alone twins ect... 12mm pumps have been tried with very limited sucess as they seize easily and have a low rev limit.

So to me the only logical next step is either twin IP's both with like 8mm heads, or an inline pump. Twin pumps would alow us to keep dynamic timing advance, but would pose a challange to get the timing between the two of them exact, as well as to create a new injector top that would allow twin feed. Not to mention the fitment issues.

So in my mind we are left with an inline pump. I have been throwing this idea around since the old hostboard days, but never seriously enough to do anything about it, but this has revitalized my intrest.

http://forums.tdiclub.com/showthread.php?t=173466 more specificly on the second page these two links
http://www.gardenpulling.nl/Multimed...hers%20Toy.wmv
and
http://www.brotherstoy.nl/technische_gegevens.htm

It makes like 350hp + probably not that streetable in a car, but good race car motor none the less.

Discuss  :wink:

[bert]

I know the bosch inline pumps on the mercedes w123 engines love pure cooking oil,and they run them in iran forever as taxis as they are so reliable,as for tuning wise  :?:
Bert

[carrizog60]

i have a friend that adapted a iveco turbo daily diesel pump to a tdi...
there were lot of fuel delivery...
if the fuel pressure could be lowered that could be a good performance pump... :idea:

[Benjamin]

on my Fiat its possible to install two pumps, but i think you need 2injectors, i think its never gonna work with two pumps on 1 injector becouse of timingproblems.

Maybe make the head from the pump watercooled?

if timing should be a problem with the inline pump maybe you can make a system like a Vtec works.

Greetz, Benjamin

[Justin]

I think that if you were to do two pumps you could maybe get away with running two injector lines to one injector this would eliminate the need for a custom head and cam plate

[745 turbogreasel]

Possibly a Stanadyne Chevy/Ford or similar pump form a V8 could be used  with opposing fuel lines Y'ed to one injector.  A small change in timing for the increased volume in the line...
These run to 3500+ RPM, so might support 7K in such a configuratiion.
In stock form, you can turn the fuel screw up to double OEM power, so maybe 300HP.

[Turbo DS]

There is a dual VE pump tractor on one of the video hosting services, and whilst looking for it I did find this, which is quite good:

http://www.youtube.com/watch?v=4cvMhlWW9R4

It looks as if it will explode at any moment, but this is simply the nature of a madly tuned, low compression engine.

There is a nice surprise at the end.

Running dual pumps is not a big of a deal as you might intuitively think.  It is crucial that the secondary pump has isometric fuel lines, but you only need a Y somewhere before the injector.  Alternatively, you may use isometric fuel lines from each pump to a Y, then standard/shortened fuel lines to the injectors.

Timing can be done statically with both pumps, and then dynamically with one of the pumps, yielding optimal timing.  Yes, it can be done, and it is not that hard to do whilst the engine is running, at least on the 6 cylinder.

[Audi80]

There is a dual VE pump tractor on one of the video hosting http://services.[/quote]Iīve seen a video of old tractor which had a Chevy 6.2 with dual pumps. Havenīt found it now... I also have heard a rumor that one local Volvo 240 has dual VE6 under hood :shock:EDIT: [url=http://video.google.com/videoplay?docid=1641713166467266832&q=v8+tractor]found the video

[Turbo DS]

Yes, that is the video I wrote of!  Good find.

I would love to see the Volvo you describe!

[Vincent Waldon]

Very clean install, nice honking turbo !!