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@quadstar Looking at the various HX35 maps, 15psi is in the first 20% of the map(s) efficiency island. IE, way down in the high 70's/80% range. Driving the HX35 turbine harder seems to improves the efficiency data points. It would seem as though the drive pressure curve would plateau-off...

With some tech knowledge turning up the proverbial wick isn't rocket science. Keeping it together past the oem warranty, idling like stock, getting better fuel economy while turning up the wick actually does require real science! It's why he's enjoyed a decades long business relationship with...

Yes they are cool. Not too many devices that small/thin can get screaming hot on one side and freezing cold on the other! Talking about sidetracking a thread, check out the other solid state cooling tech for labs. Solid bar of indium (I think) mag-lev'ed in a alternating magnetic field. They...

"Electronic cooling plates", I believe you are referring to Thermoelectic coolers (Peltier solid-state). The Co I work for has utilised these for decades. I repair many devices that use them. Peltier devices/modules can achieve very high delta-T's, yet has extraordinarily low efficiency...

Doubled wall valve covers were implemented for noise control, the crossover tube I believe was an attempt to maintain exh heat - IE, gas velocity.

@quadstar87, Interesting on the mech limitations vs the code. If you have the time, I'd love to pick your brain on the numerous reports of extraordinary pwr during pmd runaway! Do you think is all psychosomatic due to driver stress during the event, or real seatdyno experiences. If the...

@Rockabillyrat, Thank you for the Stanadyne pump details. I've never taken on rebuilding one myself, so my knowledge of parts interchangeablity is a little weak. Seems you have some rather wild experiments planned! I'll be waiting for updates, as it sounds rather amazing. Also the cam lobe...

DEI self-adhesive heat reflective multilayered compsite damping sheet material at summit racing/jegs. Several members (maybe it was on that "place" forum) have reported good results with it even on their water/air CAC's. There is also automotive/heat rated, water based spray-on sound dampening...

@treegum, Actually not a bad concept at all, so mush so that Ford owns a very broad Patent on it! If your ultimate goal is hp/compact/light weight, yes using the a/c system is very viable. But as others have pointed out, there's no free lunch. Even small automotive a/c refrigerant pumps...

@ak diesel driver, Yep, me too! But ironically, unlike the million variation of the bent sheetmetal "tornado" inserts seen on ebay. The screened gaskets at least had a shred of science behind them. On a carbureted engines, intake manifold fuel dropout (fuel separation) did occur. It was...

So I agree with what others have already pointed out on that part. But with a single part addition you could double/triple the heat-exchanger efficiency. This part is seen in boiler tubes and in the flue of some commerial gas water heaters. Its just a tight pitch corkscrew of metal inserted...

@1999gmc, What is the p/n for that inline delphi pump your running? I assume it is a 14-20psi TBI sys pump, because all the rest of that style are efi pumps that deadhead at >50psi. That model is a rotory vane type, so technically should be a flow on fail. They are usually relatively...

Holy cr@p my brain works much better before midnight! That's it, No more late night postings for me! I think my drunken weekend posts are far more coherent and thought out!

To further expand what I was saying about unattended ignition way before TDC. Yes a tune could attempt to radically delay the C/R injection event(s) to prevent this in an IDI platform. But I highly suspect the remaining time left to complete the injection would be too small. What would...

@Will L. , You beat me to the response, well here's what I was pecking out on my cell phone: My original hairbrained idea seems to have sparked some conversational interest in the idea of a real 6.5 C/R conversion. And while the scope of that project is well outside of my sphere of available...

@Rockabillyrat, I apologise for my earlier response to you, I poorly wrote that (was in a hurry and at work)! And after getting home and reading what I wrote, I realized I unintentionally sounded really rude to you - sorry about that!!! I didn't mean your dmax to 6.5 c/r convertion concepts...

I could be mistaken but I thought I've read in the past that gm ecm/pcm capped the max "tunable" FS duty cycle in the code. I also seem to remember tuners explaining that, that part of the code is not the typical variety which they would alter. Something like machine level code for a pc, its...

@Rockabillyrat, Yes a massive dmax c/r to 6.5 retrofit could be feasible given enough r&d and cubic-$. But at that point I think I'd just run out and grab a nice clean LBZ truck and call it a day. At 1:00AM stupid crap like that seems like genius concepts - till you think through the next day...

Yeah you guys got me - damn injection timing thing - total brain fart on my part! You might get away with it on c/r engine due to the very low compression ratios. But unfortunately y'all are right, on an idi the charge would cumbust on the upstroke (btc). This is catastrophic detonation, like...

So an out of the box solution that many wouldn't think about is active noise cancellation. It would require a aftermarket stereo installation with high output subwoofer(s) and lots of amplifier pwr ( which is cheap nowadays). A DSP unit with microphone input would process the noise...