What Intercooler?
01-26-09, 11:43 AM
#301
BDC Motorsports
Thread Starter
What?? The temperatures the side seals have to deal with far outweigh the hottest IAT's.
Given the fact that there's no intercooler and I'm running decently big boost on a big turbo, I don't expect it to drop below ambient with the exception of what I've already seen at lower boost (~14psi).
I think ya oughta try upping the boost on yours once you have some spark advance stuff setup you'd like to use, assuming you don't already. This is something I played with per some suggestions posted up on the ausrotary.com website and from RXHEAVEN_WA.
Given the amount of alcohol I use along with the IAT's I'm seeing on this setup, I'd really be surprised if I had any more vapourization of it. In this case, while I don't mean to disagree with you or invalidate the suggestion, I think the key here is nozzle location and staggering as opposed to having the two nozzles (per my setup) facing each other, at the tail end of the pipe run, with a giant *blast* of alcohol.
I'll give the small, pre-turbo nozzle a try at some point. I'm just not ready yet as I'm luckily having pretty good success with what I've got currently. My next step is to swap Lead plugs to a unit much more suited for the boost I'm running.
B
with the boost you are running, it may be more difficult to drop below ambient. I can't wait to up the boost on my set up and see how it responds.
I think ya oughta try upping the boost on yours once you have some spark advance stuff setup you'd like to use, assuming you don't already. This is something I played with per some suggestions posted up on the ausrotary.com website and from RXHEAVEN_WA.
glad you got that taken care of. I wouldn't put the jets so close to the TB anyway, false AIT readings, no atomization... Once you are happy with your results, try aiming the jets toward the incoming air stream. Should make you even happier 
Thanks. I will get a nice 1-4th run today so we can compare one nozzle to two.
Seriously tho, you are spraying two HUGE M10s post turbo... that's alot of alcohol. At this point I am begging you to just TRY a small M2 pre-turbo. You will see the same (if not better) results with less alcohol.
I will say, I am enjoying the step-by-step comparison. I'm just impatient.
Seriously tho, you are spraying two HUGE M10s post turbo... that's alot of alcohol. At this point I am begging you to just TRY a small M2 pre-turbo. You will see the same (if not better) results with less alcohol.
I will say, I am enjoying the step-by-step comparison. I'm just impatient.
B
01-26-09, 12:12 PM
#302
"Elusive, not deceptive!”
Brian, great thread.
My EGT’s continue to climb all the way to 8000 rpm.
My dips in EGT are poor ignition cycles, I think?
Notice that I am very high at 1800ºF /980ºC.
I'm scared!
Barry
My EGT’s continue to climb all the way to 8000 rpm.
My dips in EGT are poor ignition cycles, I think?
Notice that I am very high at 1800ºF /980ºC.
I'm scared!
Barry
01-27-09, 03:01 PM
#308
And the Revolution...
How much PSI do you think you're seeing at the injector nozzle? Because if you're boosting say a quarter of what the outlet psi would be then thats quite a substantial force pushing back against the meth. That could be impeding the flow obviously therefor not spraying as much as you think. Just a suggestion but it could be totally unfounded.
Chris
Chris
01-27-09, 03:02 PM
#309
BDC Motorsports
Thread Starter
Jan 27 09
New plugs showed up today. GReddy Trust (NGK Iridium) Rotary Racing plugs, 10 heat range. Can't wait to put these in and give it a whirl tomorrow.
01-27-09, 03:03 PM
#310
BDC Motorsports
Thread Starter
How much PSI do you think you're seeing at the injector nozzle? Because if you're boosting say a quarter of what the outlet psi would be then thats quite a substantial force pushing back against the meth. That could be impeding the flow obviously therefor not spraying as much as you think. Just a suggestion but it could be totally unfounded.
Chris
Chris
B
01-27-09, 05:37 PM
#316
Rotary Enthusiast
about atomization as an AI, i have always thought that we do not run high enough pressures, i think 500psi would be more logical at the nozzle.
hydraulic tests show for each increase of 100psi reduces droplet sphere size by around 50%,thus exposing more surface area to the oxygen and shorter vaporization time, viscosity and temps playing a roll also. (like alcohol)
also water is a great coolant, but the density weight makes it heavy and dont like to flow thru the conduit piping very well,(AKA manifolds), but higher pressures reduce the weight some.
Darn this whole damn mess gets complicated,
Sorry!! I sometimes go off into a parallel universe,Qwantum physics
Ron
hydraulic tests show for each increase of 100psi reduces droplet sphere size by around 50%,thus exposing more surface area to the oxygen and shorter vaporization time, viscosity and temps playing a roll also. (like alcohol)
also water is a great coolant, but the density weight makes it heavy and dont like to flow thru the conduit piping very well,(AKA manifolds), but higher pressures reduce the weight some.
Darn this whole damn mess gets complicated,
Sorry!! I sometimes go off into a parallel universe,Qwantum physics
Ron
01-27-09, 05:50 PM
#317
Rotary Enthusiast
I do think that Direct chamber injection is right around the corner, and the materials needed are available now!! from GM if they dont go out of business!
a rotary will probably requie two injector nozzles, something like P port installations, and pressures near 2000psi, with multiple injection pulses,per expansion event,(computor controlled of course!)
Hey guys im 75yrs old give me a break, DUH!! im workin out of a different tool box.
good work MR.Brian
a rotary will probably requie two injector nozzles, something like P port installations, and pressures near 2000psi, with multiple injection pulses,per expansion event,(computor controlled of course!)
Hey guys im 75yrs old give me a break, DUH!! im workin out of a different tool box.
good work MR.Brian
01-29-09, 06:33 PM
#322
BDC Motorsports
Thread Starter
01-30-09, 12:59 AM
#323
Stay tuned...
iTrader: (3)
Join Date: Jul 1997
Location: West Islip, Long Island NY
Posts: 2,917
Likes: 0
Received 1 Like
on
1 Post
Anthony
