Re: comparing torque numbers
Actually the rating system has changed twice over the years (for the cars anyway). Once in 1971 and again in 2005. The SAE net figures used on cars starting in '72 was as "as installed" figure. The figures from otherwise identical '71 engines was down 30 to 35 percent. The 2005 change to "Certified Horsepower" was far less dramatic and resulted in little change.
Many of the old sources that quote our truck engine figures are give them both in SAE gross and SAE net, which is representative of the engine with all accesories installed and the exhaust system.
The V6's forte is torque at low RPM's. The restricted breathing and higher internal friction will restrict horsepower to relatively low levels, compared with anything modern.
|