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Hey guys i have a '90 Mustang GT all stock except for a few mods like valve covers and spark plugs and wheels and stuff, anyways i know the specs are 225 HP @ 4000 RPM and 300 Ft. lb of torque @ 3000 RPM. My question is what RPM are you guys shifting at when ya'll do ya'll quarter mile time? It's a little confusing when the HP peak is at 4000 RPM yet the tach goes all the way to 7000 RPM and it doesn't start to redline until about 5800-5900 RPM.
Forget about redline, a stock cam, stock valve spring 5.0 will float valves right around 5000 rpm, shifting higher will make it slower, shift it at 4800-4900 rpm.
Forget about redline, a stock cam, stock valve spring 5.0 will float valves right around 5000 rpm, shifting higher will make it slower, shift it at 4800-4900 rpm.
1/4 shifting RPM??
