When did the Torpedo name disappear and same engines then became K&B?

I have a couple of identical looking .40's and some have Torpedo cast in to the side and others have K&B. The Torpedo have screws holding the crankcase in place whereas the K&B have Allen cap screws.


Wm.

....I had a couple K&B Torpedo .40's in the early 70's. They were about the hottest
engines around in their day. My guess the name and the engines disappeared around 1975.

FBD.

I agree w/ FBD...I have a couple of Series 71 "Torpedo" .40's and I don't think there were any other "Series" made in between those and the Series 75's, which have the K&B oval logo.
So I would say the Torpedo engines were probably made through 73-74?

I could not find mention of the name in advertisements past about 1970. The engines seemed to look the same in them, but only the K&B banner was present.

Many of the magazines used to include a paragraph about such corporate name changes, but could not find anything in the ones I have.

Wm.

They are basically the same...
The series 75's have a machined head so it is shiney...and the earlier ones have a cast appearance with the same (bead blasted? ) finish as the case.
I think most, if not all of the earlier ones also have a "stuffer" crank...(that's what I have heard it called ) where the counter weight looks like a completely round disc when viewed through the backplate opening, and it has a alum. ring shrunk around the outside of it.

AFAIK the pistons, sleeves, rods, etc. are the same...and all the #8011 parts will exchange.
The early "series 75" also had slotted (4-40 ) screws...I don't know exactly when they went to socket head cap screws...late 70's I think.