IE HPFP Internals For E85

[littleloogy]

Originally Posted by Easter Bunny So all the designing has already been done? Seems like a slam dunk.

Yes, they come standard with a hard plastic oil scraper and and spring loaded o-Ring. Similar to the seals in the IE retaining nut, just a smaller size (AT, Corksport, Ect)


Sent from a Galaxy far, far away...

[Mazdazilla6]

Originally Posted by littleloogy Yes, they come standard with a hard plastic oil scraper and and spring loaded o-Ring. Similar to the seals in the IE retaining nut, just a smaller size (AT, Corksport, Ect) Sent from a Galaxy far, far away...

So are those seals are what was keeping the spill valve clean with the IE internals?

[Enki]

If they are effectively keeping the oil out of the pump, then yes.

[JSmith]

Originally Posted by Enki It happens in use. This too, I've experienced first hand by removing the double seals off the internals (the scraper x ring on the retaining nut) and just idling in the driveway (cold start). After it came up to temp, it failed very, VERY quickly. By all means, test the stock internals, but expect to be out of fuel on very low boost and expect to see little to no change in death production. Remember that I tested (and found the cause of) death by boiling fuel and oil in a stove pot which was raw metal. Death also stuck to the coated sample strip I had in the pot as well.

Would more data like this be helpful? Was easy enough to collect.

[Enki]

Originally Posted by JSmith Would more data like this be helpful? Was easy enough to collect.

Good shit, but we need to correlate it to death production; it might be that using (and I say this while cringing) a pressure cooker to see what temps develop death with specific oils, and then working to prevent the temp of the HPFP from reaching that high.

Edit: Using a pressure cooker will prevent the e85 from boiling off into the air and thus allow much better control of temperature for reproduction of the issue; I'm positive it's not boiling in the pump until after the engine is shut off and begins venting excess pressure back into the tank.

Bearing that in mind, perhaps I'll manage to work a small cooling circuit into the mount that the HPFP bolts to, either feeding it cool oil or integrating a water cooling passage (oil would likely be more effective, as it will cool the internals directly, though).

[JSmith]

That is exactly where I was going with the data collection. Determining what the highest temperatures that the HPFP, and thereby fuel, experiences and working to reduce it.

Interesting point in that graph is the temperature reduction after a long idling shutdown at 17:15 and the spikes seen twice afterwards. Afterwards was a non WOT, but spirited drive home.

edit. I have AP logs for these too if anyone sees value in comparing them to this.

[Enki]

How did you pull this data, by the way? I'm planning to integrate a Megasquirt into my build and this might be something I can look into monitoring long term.

[JSmith]

I have a 3 port datalogger that I have calibrated at work. All ports are +2 deg F. 5 second recording interval. Looking for link now. Was like $300 something.

Edit:

Amazon.com: Extech SD200 3-Channel Temperature Datalogger: Industrial & Scientific

Amazon.com: Extech SD200 3-Channel Temperature Datalogger: Industrial & Scientific
Amazon.com: Extech SD200 3-Channel Temperature Datalogger: Industrial & Scientific

[MD1032]

Bump.

I might be in the market for some new internals soon. Any progress on either nitriding the CS/AT internals or finding a way to reduce the weight of the IE internals, or upgrade the cam follower?

[stoickiwi]

Sorry to resurrect this thread after about a year...

I'm interested in going full E soon and testing out some hardware fixes for the issues.
I just swapped my HPFP internals to IE ones and replaced the cam follower with a brand new one. The old follower looked worn but then again, my car has just over 80k miles on it.

This will let us know definitively whether or not the IE internals are causing this advanced wear of the cam follower or not. I'll pull the cam follower out after a few thousand miles and then post the results on here.

Pics of the old follower (right) compared to the new follower (left):

[Enki]

Nah mine looks like that with only ever having used Autotechs.

[stoickiwi]

Originally Posted by Enki Nah mine looks like that with only ever having used Autotechs.

Good to know mine looks normal for using AT's. It'll be interested to see if @littleloogy;'s wear results are replicated when I pull the pump in a while.


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