Why were engines called this?

[Clark K.]

Re: Why were engines called this?

Often, it's just a trim package. However, ZL-1 and Z-28 were examples of performance packages which included an engine unique to the package as well as other performance pieces, mostly suspension and brakes in the case of these two.

Duke and I each have a "Z-09" in addition to Sting Rays.
-Clark

[Tom P.]

Re: Why were engines called this?

Joe L. nailed it as usual.

Here's a link to RPO codes.

Another example: "M" is always used for transmissions.

http://www.nastyz28.com/gm-rpo-codes/

Chuck

And here's one of the best ever (not on Chuck's list), ZL-2, 70-72 Chevelle Cowl Induction hood!

[Clem Z.]

Re: Why were engines called this?

As a semi-interesting aside, persons wanting to buy the initial Z11 offering had to process their orders through Joe Pike for approval; not sure what kind of semi-official Review Board JP sent the applications through, but if you wanted one......

there is a fellow in punxy pa. that has 4 Z-11. 2 are former race cars and 2 are completely stock

[Clem Z.]

Re: Why were engines called this?

You are right. One of the four-wheel drive pick-ups had a Z-something decal on its flanks.

Z-71 what ever that means

[Joe L.]

Re: Why were engines called this?

Z-71 what ever that means

Z-71= "off-road chassis package" for C,K trucks

[Larry S.]

Re: Why were engines called this?

Z - 71 is an "Off road" package. I have a Suburban Z-71.

[Paul J.]

Re: Why were engines called this?

Z-71 what ever that means

Both Z-71 and Z-71 Off Road. The words "Off Road" are below the number. There's one of each in my driveway. As best as I can figure it's a heavy duty spring/shock/sway bar package, but all I'm sure about is it's real popular with the young guys.