Most of you have seen my other threads and I have done many performance upgrades to my 5.7L HEMI, and many of those upgrades came with consequences of having to beef up something else to handle the upgrades. Many upgrades like many of you were simply seeking more power from the 5.7L HEMI not realizing each upgrade affected something else that would have to be addressed. So me putting a cam in my 5.7L finally has me checking concerns first before I leap, and maybe what we learn here can help others.
The other day I posted the 8HP70 Transmission data in another thread and noticed something on the data sheet that gave me a little concern that I want to share with you all. So to start this off I am posting it again even though this information comes from dieselhub it is the exact automatic transmission in the 5.7L R/T and the 6.4L Scat Pack.
Chrysler TorqueFlite 8 (8HP70) Transmission Specs & Ratios
My concern is in relation to the "Maximum Input Speed: 5,500 rpm" of the 8HP70 transmission, seeing as how many that cam their engines are after the power build at higher rpms, which are past the transmissions maximum input speed.
Here is an excellent example clearly readable, and just one internet example by the way, of actual HP gains vs engine rpm DYNO results, testing at higher rpms building higher horsepower.
So this is about camming the engine for higher horsepower output usually resulting in higher rpm to get the full horsepower results but still running a stock 8HP70 transmission?
Comments Please?
The other day I posted the 8HP70 Transmission data in another thread and noticed something on the data sheet that gave me a little concern that I want to share with you all. So to start this off I am posting it again even though this information comes from dieselhub it is the exact automatic transmission in the 5.7L R/T and the 6.4L Scat Pack.
Chrysler TorqueFlite 8 (8HP70) Transmission Specs & Ratios
My concern is in relation to the "Maximum Input Speed: 5,500 rpm" of the 8HP70 transmission, seeing as how many that cam their engines are after the power build at higher rpms, which are past the transmissions maximum input speed.
Here is an excellent example clearly readable, and just one internet example by the way, of actual HP gains vs engine rpm DYNO results, testing at higher rpms building higher horsepower.
So this is about camming the engine for higher horsepower output usually resulting in higher rpm to get the full horsepower results but still running a stock 8HP70 transmission?
Comments Please?
