Got boost?

[me78569]

doable is one thing, but long term reliably?  I would imagine that the turbo would really be hurting above 500.  hard to know without a good map from holset.

I just don't see it.  I am sitting at 450hp on a good day, I am seeing the signs of pushing the turbo to the limits, shaft speeds, egts, boost etc.  I suppose if you were to spin another 1000 rpm and keep torque up you would get to 600 hp without too much issue. 

EGTS are in check, but at the upper limit of what I would call safe for anyone to drive it. 

[Rx7man]

It depends on the engine too I guess.. an engine that breathes better is going to require less effort from the turbo to make the power..  I'm finding heat soak in the intercooler is my big enemy for EGT's, I run cool but when I tow heavy and have to push 30+ lbs of boost my intercooler can't keep up.  I notice this because after a hard pull, the EGT's stay high for a long time and just gradually come down.
This is a big part of the reason I got the 4 channel thermocouple probe... I will have pre and post IC temps which will tell me a lot about what's going on.. Perhaps I'll even add a pre IC pressure sensor to measure IC pressure drop.

[65fpvmustang]

I run a tiny fmic it's bigger then my radiator but a ranger radiator is small compared to yours.
Ive never seen 150f mat while in boost. Granted I don't stay in boost long brakes can't take it.
It will be interesting when your therm couples are hooked up.

[Rx7man]

You start to notice it when you are pulling 8 ton up a 10% grade... there's no way you can load a Ranger hard enough to heat soak, and you probably aren't pushing the boost either, and as thermodynamics commands, more pressure = more temperature

[hakcenter]

Wait pressure makes heat? Egads notify the press

[Rx7man]

Thankfully it does otherwise a diesel would never run

[65fpvmustang]

so air temp 75 f mat climbed to 114 f during 8 sec pull 28psi looks like it would have kept climbing past 150 f
at 18 psi and around 22 lbs/min I run around 20 f over outside air temp

[65fpvmustang]

http://www.stealth316.com/2-turbotemp.htm

fun calculator for inter cooler

I just don't think it's inter cooler heat soak. there is not that much mass there.
i think it's your gauge or egt probe is slow to come down. thermal
but if I was out of inter cooler I would set up water injection.
some guys spray water on inter cooler using a washer pump

If i remember right 1 degree drop in intake temp drops egt 1 degree.

[Rx7man]

at 40PSI the compressor output temp is 464F!!.. so yeah, that's cooking hot and then some.

80% efficient intercooler will put it back down to 157F...

I think I might look at a water/ meth  injection kit... I'm positive my plenum temps are WAY higher than 157 after a long, hard pull.. but a probe there will tell me everything.

[65fpvmustang]

http://www.ebay.com/itm/100PSI-DC12V-4L-Min-Solid-Electric-Diaphragm-Water-Pump-Self-Priming-for-RV-Boat-/281366070408?hash=item4182b98488:g:3MMAAOSwaNBUbg0f

I have one of these cheap pumps on ranger. I used it a lot before I setup the dual fuel.
I only ran water thru it, and drained it in winter. The misting nozzle I got from my rx7 bud.
He had extras from his snow kit.

made huge difference on pump gas but killed power on lpg I think I needed to run alot more timing.
I run 14 degrees at +30 psi boost I probably would have to run around 25 degrees advanced at 30 psi boost to use water on lpg.

[Rx7man]

If I'd run windshield washer fluid I could leave it over winter...
That pump looks good.. I have Nitrous fogger nozzles I'd probably use for the injection side of it as well as some other types of misting nozzles with super fine spray patterns... I think I'd leave the pump on full time (it has a cutout switch) and have a solenoid controlling duty cycle.  How much water or methanol should you be injecting? I've never played with it, but know it works wonders on my old Rx7.. temps are near ambient in the plenum.

[65fpvmustang]

http://www.snowperformance.net/category-s/191.htm

I have the blue nozzle and go full flow straight water above 18 psi boost on pump gas.
I forgot to mention the solenoid on mine. duty starts around 5psi just to clear air from the line.

One book says for diesels up to 30% of the diesel fuel used.

http://www.snowperformance.net/category-s/190.htm the diesel info

[65fpvmustang]

my rx7 bud runs propane vapor injection on his 6.0 diesel
we talked about liquid injection to cool the intake, but he was really happy with his vapor.

I looked at liquid injection for my v8. It looked like i wouldn't need a inter cooler at 14psi boost the lpg would provide enough cooling.

[Rx7man]

the solenoid looks a whole lot like an Nitrous solenoid... I did have a couple of them at one time... haven't seen them in a while.. I'll have to dig around for them.


I think the biggest challenge with liquid LPG injection would be metering.. and not getting bubbles of vapor messing it up.. it may need an additional pump to keep the pressure high enough to be stable.

[65fpvmustang]

roush uses what looks like a standard gasoline fuel pump but in the lpg tank. then run 40 psi over tank pressure.
Propane is coming down from winter price $1.35 last week.