Originally Posted by lewtot184
Originally Posted by Transman
Originally Posted by lewtot184
i did a little math and think the hemi is probably going thru the traps at around 6200rpm. that would really wring out a stock street hemi from my back in the day experience. the chevelle was probably doing 7300rpm. the 375-396 in factory trim would do 6500rpm (basing this on a friends '68 375hp chevelle from back in the day). the 396 is making power thru rpm. keep in mind those BBC had big port big volume heads, more compression and cam than anything mopar had. i do think that power was close to the same for both. i estimate about 525hp which would be a big increase over true show room stock. as far as street racing went in the '60's those solid lifter BBC did run very good; especially in light novas and camaros.


Chrysler dyno tests showed a blueprinted street Hemi to make 480 HP, back in 1966/67.

Trick ring pack, cam, oil pan mods, intake tweaks, coated piston skirts, lighter internals, minimum of 50 horse increase.
I agree with you, making at least 525.

if you look at the mopar/direct connection engine books they say a street hemi was 390-410hp. i'm sure that number is engine in chassis and all accessories and factory exhaust; not engine dyno number. those type of numbers is what i always look at in a street car. naturally a modified street hemi can easily up the power. after all they were moderate compression and cam. back when i fooled with this stuff the thought was pistons and cam was all the street hemi needed. unfortunately they were crippled with heavy cars which a BBC Camaro wasn't. it's very difficult to power thru a 500+lb weight disadvantage.

Didn’t really know the guy well but I know what he did to his 71 4 speed Hemi Charger. 12.5 pistons better flat rapper cam and 5.13 gears and 11” slicks that fit the wheel well. 10.60s In the mid to lates 70s and most defiantly turned it higher than 6000. I think it had a Rat Roaster to. In a fellow racers 64 lightweight Dodge he turned 8500 with a 5.57 gear. I drove it ONE time and hit the rev limiter second and third, I was used to my slow reving Max Wedge lol. A little tune and Hemis were NOT dogs.