Topic: HPFP or in tank pump... whats the real limiting fuel factor?

[miller11386]

Yeah I am working on the neighbor company with a wire EDM to cut it down the middle to get at the insides...

[miller11386]

Guy picked up the pump today. Should be seeing the inside of that pump in the next few days!

[Lithium]

Where are we at on this, still looking at the insides, or has any company stepped up to the plate to get us a HPFP?  Really wanting to go gt2871 on E85.  The car runs sooo much better on the corn, but the only way for me to make more power is to go back to dino fuel at this point.  Or standalone fuel tank and nitrous.....?

[miller11386]

EDM ran into some issues cutting the pump. Apparently there is some kind of teflon/ rubber seal in the pump it could not cut through.

I discussed some ideas with the doctor this weekend, and have some ideas on how to make it bigger and better. However please bear with me. Its not exactly a quick engineering feat to make one of these. It appears the tolerances are pretty crazy.

Goodluck getting a company to do it for profit. I see nothing to be gained as far as profit on these. I am doing it only because I want one and others have helped me along the way to try to figure it out.

If someone else has another HPFP that they can bore the fittings on, that would be a start as well. Once I get some cut away pics I will try to explain how it was explained to me.

[miller11386]

Finally got the pump that was given back from the EDM shop. To say they did a poor job is an overstatement. Very upset this guy wasted my time. However I did snap a couple photos just for reference before I claw any deeper into the pump. Not a whole lot to look at, but I figured that I owed it to Tazz to get something up for being so generous.

(pics relinked below in post 307)

[SKY888]

To say they did a poor job is an overstatement.   <---- or is it an UNDERSTATEMENT?


The LNF pump is a PITA.   I really doubt it can be machined out to flow better.

a higher flowing bosch pump (from other bigger engine GM cars) that will be compatible to LNF should be the next route.

[kennysabarese]

pics don't work

[miller11386]

I see them?

Is anyone else having issues seeing the pics?

[miller11386]

To say they did a poor job is an overstatement.   <---- or is it an UNDERSTATEMENT?

An overstatement, because "poor" is far too decent of a word for how long they had it, and how miserable the cuts are on it.

[SKY888]

An overstatement, because "poor" is far too decent of a word for how long they had it, and how miserable the cuts are on it.

I thought you can say understatement, because "poor" is a polite statement.   You could've said hack-job.....amateur work.........or simply just DESTROYED the pump.


anyways....under/over .......it doesnt really matter..........that shop really wasted your time, unfortunately.

And of course our hopes were crushed

[kennysabarese]

pics don't work

When i right click and choose "open picture in new window" i get a yahoo page with an error that says "forbidden"

[miller11386]

Relinked photos from another source:

[tazz]

Oh well the way it goes.
I wish the guy I knew was still with us since he had a whole shop in his Morton garage that could have done something with that pump.  He passed a few years ago from Cancer but he could machine like you would not believe and would have probably been able to do something with the pump.  He was a machineist for Sanovo for 40yrs and on his off time he machined hard to find and one off parts for race boats.  He could machine whatever you wanted and for his brother he made a fully machined running miniature  Chevy V8 engine to give as a 50th B-day gift. 

[miller11386]

Tazz,

I plan to machine deeper into the pump to get a better view of the internals. However the upper baffles are confusing to me. The only thing I can think of is to keep laminar pressure/flow through the pump.

I will post more photos as I dig deeper. If  possible I would like to get down to see what size valve is in teh pump and how big the area inside the compression chamber is.

[Critterman]

Finally got the pump that was given back from the EDM shop. To say they did a poor job is an overstatement. Very upset this guy wasted my time. However I did snap a couple photos just for reference before I claw any deeper into the pump. Not a whole lot to look at, but I figured that I owed it to Tazz to get something up for being so generous.

big red X and when I try to go to the URL I get:

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[miller11386]

i removed the first links to avoid confusion and directed people to look at the second set I posted up

[elff]

With people solving the fuel delivery issue with a 5th injector, why is the pump still being looked at?

[tazz]

Probably some people don't trust or like the idea of a 5th injector?

[miller11386]

In a perfect world, I would rather have a capable hpfp vs secondary controllers, injectors etc.

However it seems that the injectors cannot pound enough fuel in fast enough, so I will continue my little research project to help anyone in the future that needs/wants to do the project.

Plus I haven't given  up on it yet.

[elff]

It ain't a perfect world and this is a working solution vs all the pages of guess work on the pump issue which has zero progress.

[miller11386]

I am this deep into it, and have already ruined the pump. My mind wants to know whats inside it, so I will find out

[kennysabarese]

Miller and I debated about the 5th injector a few pages ago. Don't bring it up again!

[elff]

Sooo, you would rather debate something that isn't going to solve the situation?

Lots of people have done Meth. A controller for the 5th injector is no different, in fact, you would use a meth kit controller.

[kennysabarese]

Just saying to save your "breath" when it comes to convincing miller to do it since he's already said no

[miller11386]

No, Kenny, surprisingly I finally found my way to the light..after that little debate we had I dug in and did my research on it... I pretty much have admitted that i will have to go to an injector setup if I want to make anything past 500whp.

Not a huge fan of the "5th injector" but I will probably run something similar to the Sky888 secondary fuel rail. (4 injectors)

Seems legit and safer than the single mani injector. I would rather not have my AFR rich in one cyl and lean in another, so PI at the end of the runners is most likely what I will go with..

Plust the price difference from a 5th injector vs a 2nd fuel rail really isnt that drastic. And the split sec controller is designed to do exactly what I want.... progressive spray vs a known value. (boost)

I would RATHER have a hpfp that is better, but its just not financially responsible.. even by my standards