its called a rotary engine it produces about 30,000 rpm
The stock 400 Big Block was actually a 402 and they had 2 engines in 1972, one had 210 HP and the other had 240 HP.
Depends on which big block, what vehicle it is installed in, and the speed you are driving.
211 hp
175
The 350 is the small block, and in 1986 it would be GM corporate blue.
9:1.
400 small block 2brl was the basic engine with a 454 big block optional
For complete engines, the weight of the average (stock) 400 Pontiac at about 650 lbs. is roughly between the average (stock) Chevy small block at about 575 lbs. and the average (stock) Chevy big block at about 680-685 lbs..
Depends on the class, Top fuel use Chrysler base Hemi engines super comp/other dragsters use Hemis or big block chevys for the most part superstock/stock- depends on what was avail. in that make, most are small block/big block- chevy, ford, Chrysler V8s due to the abundant amount of racing parts avail.
I've heard of boring and stroking to 572, but probably not much more without a tall deck.
Why a Chevy Big Block of Course.
With a stock oil pan, and considering the filter holds almost a quart, 6.