TR constant, need some insight.
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Joined: Mar 2006
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Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
TR constant, need some insight.
I have a friend with a Turbo Regal, that needs some minor tweaking of the bin.
Most notably, the injector size needs to compensated for. In the xdf I have, it displays the Injector Flow Rate in "Sec/Gm", and for the life of me I can't seem to convert this or find a way to convert to pound per hour, or visa-versa.
If I remember right, the stock injector size is 30 lbs/hr, which by my calulations works out to around 3.78 grams/sec. The stock bin shows .28.
What am I missing?
Most notably, the injector size needs to compensated for. In the xdf I have, it displays the Injector Flow Rate in "Sec/Gm", and for the life of me I can't seem to convert this or find a way to convert to pound per hour, or visa-versa.
If I remember right, the stock injector size is 30 lbs/hr, which by my calulations works out to around 3.78 grams/sec. The stock bin shows .28.
What am I missing?
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From: Chasing Electrons
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Re: TR constant, need some insight.
Just invert the 3.78 gms/sec value for seconds per gram of fuel. This gives .265, which is close to the .28 of the stock calibration.
The stock injectors are actually a little less then 30#/hr (thought I had it written down, but can't find it). Converting the .28 produces 28.3 #/hr.
sec/gm = 1 / (#hr / 3600 * 453.6)
RBob.
The stock injectors are actually a little less then 30#/hr (thought I had it written down, but can't find it). Converting the .28 produces 28.3 #/hr.
sec/gm = 1 / (#hr / 3600 * 453.6)
RBob.
Thread Starter
Joined: Mar 2006
Posts: 4,370
Likes: 17
Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Re: TR constant, need some insight.
Just invert the 3.78 gms/sec value for seconds per gram of fuel. This gives .265, which is close to the .28 of the stock calibration.
The stock injectors are actually a little less then 30#/hr (thought I had it written down, but can't find it). Converting the .28 produces 28.3 #/hr.
sec/gm = 1 / (#hr / 3600 * 453.6)
RBob.
The stock injectors are actually a little less then 30#/hr (thought I had it written down, but can't find it). Converting the .28 produces 28.3 #/hr.
sec/gm = 1 / (#hr / 3600 * 453.6)
RBob.
I guess I didn't quite understand the variable.
I have saved the calc to the XDF, where it will always be handy.
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