318 rebuild/upgrade

rumblefish360 said

Why would you think a performer would flow poorly on a 273 and or be out done by a older discontiued intake. Is it a C.I.D. thing?
I seldom if really ever see a company, like Edelbrock, go backwards in intake manifold design.

Click to expand...

Ask Edelbrock why they do Not list the 273 in
the engines the Performer fits. ;)

Maybe they discontinued the LD4B, because sales were low,
as the 273 engine was last built in 1969, the 318 was still being built
in 1989.

The Performer ports are larger than the 273.

I am using an LD4B intake on my 318,
because I wanted a small port intake. I drive my Valiant on the street.

I drove it to Carlisle last year,and got from 16-21 mpg,on the road,
depending on the speed I was going.
When I kept up with some fast moving Trucks, 80-90 mph i got the 16 ish
mpg. When I was in heavier traffic going 55-70 mph, I got 21 mpg.

The torker is not,nor was ever suggested for use on a 273,
it might bolt up,but the way it works will not be as good,
as on a larger engine.