Just a little more . . . . .

How to make it go fast

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Re: Just a little more . . . . .

Postby BC847 » Sun Aug 06, 2017 6:02 pm

I'm pleased to say the return trip from the coast was uneventful. While on the interstate, I remembered the data-logger thingy!

So, the other day, Jason and I were talking P/Rs and such and I got to talking about the more realistic, normal driving conditions. So . . .

I pulled off the highway and plugged in the logger USB thingy and started it.

I pulled onto my lane and leaned on the throttle so as to come to a steady-state load of acceleration at about 60% throttle . . . and held it there till i was up to 70ish mph. (I got off the fuel a little for gear-changes so as not to blow anymore smoke than necessary. Cars were coming up behind me . . . . initially ;) ).

Image


Primary: 2.10 P/R @ 16.2psig.
Secondary: 1.51 P/R @ 32psig

33.8psig @ intake-log / 30.8psig back-pressure.




Next, I'm simply maintaining 75mph . . .

Orange is the engine RPM.
Top-Purple is the EGT. You can see the heat go up and down with the throttle application to maintain highway speed.
Those plots at the bottom are the turbos and boost, etc.

Image



Looking at a portion that shows a relative average of things gives me . . . .

Primary: 1.15 P/R @ 2.3psig.
Secondary: 1.27 P/R @ 7psig.

7.7psig @ intake-log / 6.1psig back-pressure.


Loving the Boost to Back-Pressure ratios of better than 1/1. :D


Well, then . . . . . . .
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
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Re: Just a little more . . . . .

Postby spencerdiesel » Wed Aug 09, 2017 7:59 pm

I find the data logger intriguing. Just curious BC, what does that large injectored beast get for fuel mileage?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw 1 turn
Muffler delete
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Re: Just a little more . . . . .

Postby Remps » Thu Aug 10, 2017 5:27 pm

I'm guessing about 13-16 mpg, with all the data logging and whatnot. :lol: But I bet the fuel to torque curve is pretty good.
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Just a little more . . . . .

Postby BC847 » Thu Aug 10, 2017 7:24 pm

It's historically been 16 or so.

I filled the truck before heading to the coast this past Friday. The odometer says I drove 304 miles round-trip. The fuel tanks gauge says I've got a little over a quarter-tank left (with the truck sitting dead-still for a while).

NOTE: When the Low Fuel light comes on, I've siphoned out perhaps eight or so gallons from the tank. I figure there's that much, if not ten or so still in there.
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
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Re: Just a little more . . . . .

Postby BC847 » Fri Aug 11, 2017 7:58 pm

Got the radiator reservoir sorted out. Originally intended for a Toyota Landcruiser er something.

Fits nice. 8)

Image
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
BC847
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Posts: 1892
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Re: Just a little more . . . . .

Postby BC847 » Fri Aug 11, 2017 8:22 pm

Any time I take photographs, it's common for me to get multiples of all the different subjects. Same for the above image.

Reviewing the photos, looking at all the stuff that needs paint/touch-up, that loud-ass radiator cap, etc, I noticed I've yet to connect and run the stupid power cord for the crankcase heater.

Image



Another thread in the rat's nest. Perfect.

Gotta better dress the wire-loom stuff. That coming down off the alternator is the gauge/data-logger sensor wiring. That larger one is the OEM cabling for the alternator. That one I can make smaller.

My Son wants to do a "Wire-Tuck" to it. :shock:
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
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Re: Just a little more . . . . .

Postby BC847 » Sun Aug 13, 2017 6:35 pm

Got the tachometer of the data-logger working. 8)
David

1993 12mm VE Fueled W250 CC, Green
12.67 @ 103.35
Your basic farm truck ;)
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