T-REX cam dyno results
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I have a 4000 vigilante on the way. I knew about the power band but dyno time is scarce there so I went with what I had for now, gonna put the 3400 in my sons car when I get the other one.
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SAE usually gives more power on a graph. SAE corrected numbers well do what it says - corrects the numbers to include pressure and temps and all that good stuff so if u were to take ur car to another place ud have similar numbers to compare... i guess is the easiest way to say it at 750am with no coffee lol
SAE usually gives more power on a graph. SAE corrected numbers well do what it says - corrects the numbers to include pressure and temps and all that good stuff so if u were to take ur car to another place ud have similar numbers to compare... i guess is the easiest way to say it at 750am with no coffee lol
Some info I found:
To convert raw horsepower and torque to SAE as given in SAE J1349 JUN90,
CF = 1.180[(29.235/Pd)((T + 459.67)/536.67)1/2] – 0.180
where PD is the dry air pressure (in Hg) corrected to sea level, and T is the ambient temp (in oF). STD is different from SAE simply because it uses a different set of environmental conditions, as shown below
The "old" definition for the so-called STD conditions were:
STD: T = 60 oF, Pd = 29.921 in Hg, RH = 0%, elevation = sea level
For SAE, the conditions are:
SAE: T = 77 oF, Pd = 29.235 in Hg, RH = 0%, elevation = sea level.
So from that definition of STD, to get STD from SAE, multiply by 1.047. To get SAE from STD, divide by 1.047. However, WinPEP v.6.03 software uses T = 68 oF for STD corrections, which results in 1/CF = 1.038. Some others define STD conditions as having T = 15 oC (= 59 oF). For example, the International Standard Atmosphere is T = 15 oC and PD = 1013.25 mb (=29.92 in Hg). The DynoJet Runviewer software v.7.0.1 uses still another definition for STD, which results in STD being about 2.1% higher than SAE. This is why there seems to be so much disagreement and confusion as to what the “correct” conversion factor is between STD and SAE. The problem lies in the fact that there doesn’t seem to be any real set definition for STD conditions. This is the main reason why I prefer to use SAE. Note - the difference between SAE and STD only depends on their relative definitions, not the actual ambient conditions. (Some have stated erroneously that the conversion from SAE to STD, or vice versa, depends on ambient conditions, which is not true. Ambient conditions only play a role in converting the uncorrected numbers to SAE or STD.)
To convert raw horsepower and torque to SAE as given in SAE J1349 JUN90,
CF = 1.180[(29.235/Pd)((T + 459.67)/536.67)1/2] – 0.180
where PD is the dry air pressure (in Hg) corrected to sea level, and T is the ambient temp (in oF). STD is different from SAE simply because it uses a different set of environmental conditions, as shown below
The "old" definition for the so-called STD conditions were:
STD: T = 60 oF, Pd = 29.921 in Hg, RH = 0%, elevation = sea level
For SAE, the conditions are:
SAE: T = 77 oF, Pd = 29.235 in Hg, RH = 0%, elevation = sea level.
So from that definition of STD, to get STD from SAE, multiply by 1.047. To get SAE from STD, divide by 1.047. However, WinPEP v.6.03 software uses T = 68 oF for STD corrections, which results in 1/CF = 1.038. Some others define STD conditions as having T = 15 oC (= 59 oF). For example, the International Standard Atmosphere is T = 15 oC and PD = 1013.25 mb (=29.92 in Hg). The DynoJet Runviewer software v.7.0.1 uses still another definition for STD, which results in STD being about 2.1% higher than SAE. This is why there seems to be so much disagreement and confusion as to what the “correct” conversion factor is between STD and SAE. The problem lies in the fact that there doesn’t seem to be any real set definition for STD conditions. This is the main reason why I prefer to use SAE. Note - the difference between SAE and STD only depends on their relative definitions, not the actual ambient conditions. (Some have stated erroneously that the conversion from SAE to STD, or vice versa, depends on ambient conditions, which is not true. Ambient conditions only play a role in converting the uncorrected numbers to SAE or STD.)
Some info I found:
To convert raw horsepower and torque to SAE as given in SAE J1349 JUN90,
CF = 1.180[(29.235/Pd)((T + 459.67)/536.67)1/2] – 0.180
where PD is the dry air pressure (in Hg) corrected to sea level, and T is the ambient temp (in oF). STD is different from SAE simply because it uses a different set of environmental conditions, as shown below
The "old" definition for the so-called STD conditions were:
STD: T = 60 oF, Pd = 29.921 in Hg, RH = 0%, elevation = sea level
For SAE, the conditions are:
SAE: T = 77 oF, Pd = 29.235 in Hg, RH = 0%, elevation = sea level.
So from that definition of STD, to get STD from SAE, multiply by 1.047. To get SAE from STD, divide by 1.047. However, WinPEP v.6.03 software uses T = 68 oF for STD corrections, which results in 1/CF = 1.038. Some others define STD conditions as having T = 15 oC (= 59 oF). For example, the International Standard Atmosphere is T = 15 oC and PD = 1013.25 mb (=29.92 in Hg). The DynoJet Runviewer software v.7.0.1 uses still another definition for STD, which results in STD being about 2.1% higher than SAE. This is why there seems to be so much disagreement and confusion as to what the “correct” conversion factor is between STD and SAE. The problem lies in the fact that there doesn’t seem to be any real set definition for STD conditions. This is the main reason why I prefer to use SAE. Note - the difference between SAE and STD only depends on their relative definitions, not the actual ambient conditions. (Some have stated erroneously that the conversion from SAE to STD, or vice versa, depends on ambient conditions, which is not true. Ambient conditions only play a role in converting the uncorrected numbers to SAE or STD.)
To convert raw horsepower and torque to SAE as given in SAE J1349 JUN90,
CF = 1.180[(29.235/Pd)((T + 459.67)/536.67)1/2] – 0.180
where PD is the dry air pressure (in Hg) corrected to sea level, and T is the ambient temp (in oF). STD is different from SAE simply because it uses a different set of environmental conditions, as shown below
The "old" definition for the so-called STD conditions were:
STD: T = 60 oF, Pd = 29.921 in Hg, RH = 0%, elevation = sea level
For SAE, the conditions are:
SAE: T = 77 oF, Pd = 29.235 in Hg, RH = 0%, elevation = sea level.
So from that definition of STD, to get STD from SAE, multiply by 1.047. To get SAE from STD, divide by 1.047. However, WinPEP v.6.03 software uses T = 68 oF for STD corrections, which results in 1/CF = 1.038. Some others define STD conditions as having T = 15 oC (= 59 oF). For example, the International Standard Atmosphere is T = 15 oC and PD = 1013.25 mb (=29.92 in Hg). The DynoJet Runviewer software v.7.0.1 uses still another definition for STD, which results in STD being about 2.1% higher than SAE. This is why there seems to be so much disagreement and confusion as to what the “correct” conversion factor is between STD and SAE. The problem lies in the fact that there doesn’t seem to be any real set definition for STD conditions. This is the main reason why I prefer to use SAE. Note - the difference between SAE and STD only depends on their relative definitions, not the actual ambient conditions. (Some have stated erroneously that the conversion from SAE to STD, or vice versa, depends on ambient conditions, which is not true. Ambient conditions only play a role in converting the uncorrected numbers to SAE or STD.)
Now my head hurts!
LOL 
Thanks guys! Unfortunately I think I may have transmission issues now! Seems to slip and slide sometimes, not sure if it is the converter or tranny.
Gonna go find a good lonely road somewhere and see if it holds up! Might b time for a 350/400 turbo?? Hate the thought of losing OD though.
Gonna go find a good lonely road somewhere and see if it holds up! Might b time for a 350/400 turbo?? Hate the thought of losing OD though.
Not still the stock trans is it? I know you still have the 4L60E in there, but has it been modified at all? Take it to Chuck at FLT if you want to keep OD. He does GREAT work.
Nope, it's not stock, beast sunshell,5 pin planets,aftermarket servo, supposed to be the good stuff! Might be the converter or in the electronics?? I have had a lot of electrical problems so far, sensors not reading right or intermittent etc.......