kgibson4

My Feedback: (4)

I've seen posts on the various forums refering to "small bock" engines and "big block" engines. Can someone define for me what makes an engine a small block or a big block? Is it "anything larger than .XX cu. in. is a big block" or is there some other way of defining it?

Thanks,

Ken ( 64 and still a newb)

toyotatruckin

under .21 small block-21 and over=big block with the exception of the picomaxx which is the only .21 small block made that i know of for the purpose of a drop-in replacement upgrade for the t-maxx some years back

moparbarn

it also has to do with the physical size of the engine block. a lot of car & truck .21's are smaller in size than our marine .21 engines. both the engines in my trucks, a traxxas revo 3.3 & a torque .21 in my duratrax thunder quake are much smaller than any of my cmb, mac or k&b .21's. i,ve heard the smaller size .21's referred to as mid blocks, just to muddy the waters further. but like yota says, .21 seems to be the dividing line between the 2.

toyotatruckin

Actually the 3.3 is a small block .20 same size case as in an .18 .15 .12 etc

Ron Olson

My Feedback: (1)

To me, anything over a .21 would be a big-block. Some might say that anything over a .45 would be.
Maybe one of these days we'll be calling them Mouse motors or Mountain motors like the car racers.

Blackout

.28 a big block? That's a good one! We are talking about boats...