Time for a new hpop thread

thuglike · Sep 30, 2015

I'd like to note as well.....

At the track DP tunes were consistant 12.3 - 12.4 and from 108-109 mph with a best of 12.21 @ 110.59

Jon's tune did 12.1 at 111.25 and never dropped below 110.85.
Only ran 1 day on this tune before I sold the old girl.

thuglike · Sep 30, 2015

PABowhunter said:
That's pretty interesting. Lowered the pw by 1.3 ms and picked up 70 hp.

Also called for less ICP.

Now, Jon had the advantage of the dyno. But 2 small tweeks...

TyCorr · Sep 30, 2015

Vref, you ever get your built motor and all that stuff going?

mandkole · Sep 30, 2015

Magnum PD said:
That's pulse width right? I'm asking at what percentage of duty cycle is the HPOP doing more than it should? 80%?

From the HPOP manual, the max command of the IPR is 65%. Id take that to mean that anything beyond that is wide open.

TyCorr · Sep 30, 2015

mandkole said:
From the HPOP manual, the max command of the IPR is 65%. Id take that to mean that anything beyond that is wide open.

Most ive ever seen is 60%....people claim to have seen 80 but I dont know.

02BigD · Oct 1, 2015

V-Ref said:
Great data...with dyno #s...that kind of data puts all conjecture to rest.

Be interested in seeing some 200% nozzle Gen 3 #s

355/200's Swamps injectors with a Gen3.

Hot tune, I've never seen over 35% dc that I can recall, big tune max has been 42%. Matt's tunes.

V-Ref · Oct 1, 2015

02BigD said:
355/200's Swamps injectors with a Gen3.

Hot tune, I've never seen over 35% dc that I can recall, big tune max has been 42%. Matt's tunes.

Do you know the ICP? Or PW?

V-Ref · Oct 1, 2015

TyCorr said:
Vref, you ever get your built motor and all that stuff going?

Those things are expensive

Someday!

lincolnlocker · Oct 1, 2015

need to start a new thread.. the last 15-20 posts would he a good thread starter stating what your setup does and what it calls for.. like thuggys post.. very useful to see what a lil change can make..

live life full throttle

PABowhunter · Oct 1, 2015

thuglike@dynoproven said:
Also called for less ICP.

Now, Jon had the advantage of the dyno. But 2 small tweeks...

I was going to ask if both were live tuned.

This raises two more questions in my head.

1. At what point is more pw no longer needed? In this case, with a 200% nozzle, the hpop could easily handle a higher pw tune, but didn't make anymore power. Obviously pw will be determined by nozzle size, but, assuming your hpop can handle whatever you call for...where do you go from making peak power to wasting fuel?

2. The same applies for icp. Just because a tune calls for 3700 psi, it obviously wasn't needed to make more power in this case. Where is the threshold for icp and pumping more oil than you need?

V-Ref · Oct 1, 2015

It depends! At what RPM?....As maximum "usable" PW is time defined event.....& SOI is a mechanically defined event...start SOI to "early"...injection event happens outside of piston bowl, damage to piston/cylinder wall, cylinder pressures rise to catastrophic levels....expensive!

What the magic cylinder pressure level is...that data would be hard to come by....a 7.3 engine dyno is probably a good tool for that

I wonder who has one of those ?

02BigD · Oct 1, 2015

V-Ref said:
Do you know the ICP? Or PW?

ICP is around 3400. I do not know PW.

ja_cain · Oct 1, 2015

V-Ref said:
It depends! At what RPM?....As maximum "usable" PW is time defined event.....& SOI is a mechanically defined event...start SOI to "early"...injection event happens outside of piston bowl, damage to piston/cylinder wall, cylinder pressures rise to catastrophic levels....expensive!

What the magic cylinder pressure level is...that data would be hard to come by....a 7.3 engine dyno is probably a good tool for that

I wonder who has one of those ?

Dave has one with specially machined heads to accept transducers too.

Keep in mind, too much atomization may significantly change SOI (ICP). You might get to the point where it ignites before it even makes it to the bowl. Just a theory. This may not be an issue with a 200% nozzle though.

Sent from my SCH-I545 using Tapatalk

DocBar · Oct 1, 2015

I'm running the HBjr with 250/100's and zero issues.
I'll be at Dynoproven next week and maybe we can throw it on the dyno and see what it puts down. I've got to get my AE updated for Windows 10, so I can't data log right now.
I'll be putting the 400's in soon, so I'll data log that as soon as I can.

TyCorr · Oct 1, 2015

lincolnlocker said:
need to start a new thread.. the last 15-20 posts would he a good thread starter stating what your setup does and what it calls for.. like thuggys post.. very useful to see what a lil change can make..

live life full throttle

We dont need a new thread. People need to read.. that was what the title and OP asked for. I asked for it to be cleaned up. To no avail.

TyCorr · Oct 1, 2015

ja_cain said:
Dave has one with specially machined heads to accept transducers too.

Keep in mind, too much atomization may significantly change SOI (ICP). You might get to the point where it ignites before it even makes it to the bowl. Just a theory. This may not be an issue with a 200% nozzle though.

Sent from my SCH-I545 using Tapatalk

That could be true if you were in a low icp situation as people have discussed for years. People also think hybrids with larger (200+%) nozzles are smoky because of the reduced pressure at the nozzle. But reality doesnt support it. I mean, I suppose you could make it if you were trying to. Just like a 200% can get hazy at idle if not taken into consideration b7t a slight bump in icp seems to clean it up. Seems to be the fix for a lot of issues with larger nozzles, lol, bump the control pressure up a hair. Everything else follows suit.

Edit: I don't think atomization is an issue. I cant really even tell. Even in od, it seems a nonissue as the extra fuel seems to drive the charger harder and clean up the low boost fuel. So you get a puff before the boost comes up.

Dmstrucks02 · Oct 1, 2015

TyCorr said:
We dont need a new thread. People need to read.. that was what the title and OP asked for. I asked for it to be cleaned up. To no avail.

Is it because we're just talking about junky Ole 7.3s

Sent from my SAMSUNG-SM-G890A using Tapatalk

TyCorr · Oct 1, 2015

True! I get it. A dying platform. Butthere are many still going.

The explorer had its first oilchange today. There is a 00 rclb xlt 7.3 in decent shape there. 14,999...not joking.

go to schimmerford.com and search.

ja_cain · Oct 1, 2015

Exactly, I'm just wondering if tuners take into account for significant changes in atomization. Like going from ICP of 2800 to 3400. There has got to be significant drop in droplet size, so SOI is going to happen earlier or the flame front propogates faster due faster fuel vaporization. I would assume time changes would need to be made to account for this.

Sent from my SCH-I545 using Tapatalk

thuglike · Oct 1, 2015

DocBar said:
I'm running the HBjr with 250/100's and zero issues.
I'll be at Dynoproven next week and maybe we can throw it on the dyno and see what it puts down. I've got to get my AE updated for Windows 10, so I can't data log right now.
I'll be putting the 400's in soon, so I'll data log that as soon as I can.

If you like I'll put you on the schedule to ensure your on the dyno...just tell me what days you'll be there....

Dyno time is like play time for Jon.