MoparTrucker
Active Member
I tried to search it but I couldn't find it everywhere I searched, The 400 V8: Final Mopar Big Block Engine they tell you net horsepower but what was the gross HP and Torque ratings for it?
There were no gross HP ratings given. Not since 1972.
Yeah, just if anyone here knows its gross that have dynoed it
Dyno a 7.5:1 400? Sure, why not?I tried to search it but I couldn't find it everywhere I searched, The 400 V8: Final Mopar Big Block Engine they tell you net horsepower but what was the gross HP and Torque ratings for it?
@RustyRatRod besides the compression ratio of the 400 dropping and the bigger bore, did the big block change much during the smog years in the major parts vs the earlier 383? Things like valve sizes and camshaft?
Not much..those 400's were DOGS from the factory..now when you stroke them...make sure to install a hardened intermediate shaft.
I’d say in 100% stock form, with the correct ex manifolds, stock earlier TQ(non-lean burn), driving the water pump and alternator, air cleaner in place...... 280-300hp “STP” corrected hp should be in the ball park.
Finding another 100hp with typical hot rod upgrades would be no problem.