1971 340's True HP?

hux340 said

Hi all,
I have a 71 H code Dodge Demon & they reckon it came with 275hp from the factory. I've heard a lot of Chrysler made their muscle cars hp underrated for insurance purposes. If that's true what would be a more accurate hp figure for the 340's.

Cheers,
Glenn.

Click to expand...

The NHRA re-factored the 340/275 HP to 310 HP back in the day.

But the 1971 version with the Carter Thermoquad Carburetor puts out
approximately {+8 HP} over the earlier {1968 thru 1970} 340's with
Carter AVS Carburetor

When we Dyno-Tested a couple of new 'stock' 1971 Duster's 340 back in 1971,
we were right in the {299 to 302 HP} range when dialed in.

Current Horsepower numbers are listed at >
1968 thru 1970 ~ 340/275 HP ....... 290 HP
1971 ~ 340/275 HP ...................... 297 HP