'57 270 HP Engine

[Greg K.]

Does anyone know when in the '57 production line the 270 HP engine was cut in?

[Richard M.]

Re: '57 270 HP Engine

Good question, I don't know the answer. But I want to know so I'm giving your post a bump to the top!

Rich
p.s. Welcome Greg!!! I just noticed it's your first post. Lots to learn here from a great group.

[Gary C.]

Re: '57 270 HP Engine

Greg,

AFAIK from 1st day of production 270 HP engines were available. 270 HP engines are in all of the early 1957 Chevrolet and Corvette literature I have.

2626S (front) and 2627S (rear) 1957 2x4 carburetors were introduced in October 1956 carburetor production date. Early 270 HP engines probably used 1956 2x4 carburetors 2419S and 2362S.

Gary
....

[Stuart F.]

Re: '57 270 HP Engine

I prefer the latter with the air idle, except the cross cut manifold of the 57 was a step in the right direction to address the lean cylinders condition of the 56 manifold. To do it right, you still must jack up the carbs with cross cuts another 1-1/4".

Having already developed the 225 and 240 hp 265CI engines in 56, it wasn't much of a leap to adapt the 2 x4's and solid lifter cam to the 283 CI.

Stu Fox

[Greg K.]

Re: '57 270 HP Engine

Great info. Really appreciate the help.