http://www.turbofast.com.au/tfcalc.html
When I enter in the following specs:
Bore: 3.71 (I have .040" overbore)
Stroke: 3.126
RPM: 5500
Ambient air temperature: 72
Number of cyl: 6
Engine volumetric efficiency: .39 (I based this off a V/E calculator using unported log intake air flow of 129cfm, 203 cid, 5500 rpm)
Boost Pressure: 16lbs boost
Compressor Efficiency: 70%
Water temp: blank (Wont let me input, for water air intercooler? )
Intercooler Efficiency: 70%
The calculator says that I should be making about 178hp and 169 ft lbs torque and turbocharged cfm would be about 231cfm.
I am surprised that the horsepower is so low that even with turbo the engine wont make 1hp per cubic inch?
I was also surprised that the torque would be less than the horsepower. I was under impression, however uninformed, that turbo engines usually make more torque than horsepower.
If this is correct then my engine will make no where near the goal I was hoping for. Was hoping for 300hp/300ft lbs but was expecting in my minds understanding a more "realistic" 250hp and 285ft lbs
If this is true only way to make decent power is to get the aluminum head which I dont see happening any time soon as its teasingly just outside what I can afford.
Even when I enter data using stock out of box aluminum head I show V/E of about .65 and about 296hp and 283 ft lbs torque. That would be close to my goal.
When I enter in the following specs:
Bore: 3.71 (I have .040" overbore)
Stroke: 3.126
RPM: 5500
Ambient air temperature: 72
Number of cyl: 6
Engine volumetric efficiency: .39 (I based this off a V/E calculator using unported log intake air flow of 129cfm, 203 cid, 5500 rpm)
Boost Pressure: 16lbs boost
Compressor Efficiency: 70%
Water temp: blank (Wont let me input, for water air intercooler? )
Intercooler Efficiency: 70%
The calculator says that I should be making about 178hp and 169 ft lbs torque and turbocharged cfm would be about 231cfm.
I am surprised that the horsepower is so low that even with turbo the engine wont make 1hp per cubic inch?
I was also surprised that the torque would be less than the horsepower. I was under impression, however uninformed, that turbo engines usually make more torque than horsepower.
If this is correct then my engine will make no where near the goal I was hoping for. Was hoping for 300hp/300ft lbs but was expecting in my minds understanding a more "realistic" 250hp and 285ft lbs
If this is true only way to make decent power is to get the aluminum head which I dont see happening any time soon as its teasingly just outside what I can afford.
Even when I enter data using stock out of box aluminum head I show V/E of about .65 and about 296hp and 283 ft lbs torque. That would be close to my goal.