Hello,
Does anyone know where I can find a price guide for a ZR1 convertible. Has anyone seen one trade hands? I am looking at a #'s matching project that has all of the ZR1 options. With out the tank sticker is there any way to no if this is a factory ZR1?
Thanks,
Tony

 

the door jam sticker has the engine code on it if it still has it.

 

Without the tank sticker or other documentation that can establish a paper trail...it's pretty tough to confirm a ZR1. A few options could be studied that are common to LT1s like a single fuel line and either the transistor ignition or the holes in its absence. This had been discussed and is readily available in the archives.

Probably the more interesting aspect here is that ZR1 was marketed as an off-road option...the configuration your looking at is an obvious on-road configuration with the convertible RPO. I mean...who would have bought an off-road roadster when the oxy moron thing to do is to be seen with the top down on the street?

Also ZR1s would not have power steering due to a 6 quart oil pan. The radiator was the all aluminum GM# 3007436...the part number is stamped on top of the radiator, has no radiator cap but has a hose that connects to an external aluminum surge tank installed on the passenger side inside fender. This feature is not unique to ZR1s but offers enough evidence to differentiate from clones.

It also included the J50 and J56 heavy-duty brake package and usually gets missed on clones. The brake pads have a turned over lip that faces the outside of the caliper...quite distinctive from the ordinary brake caliper pads.

That ought to get you started...let us know what you find out.

 

do you know what these cars are worth? Are they priced the same as LT1 ? I can't find anything in any books?
Thanks,
Tony

 

A ZR1 is going to be priced a lot higher tha na LT1 car of same quality. They are a lot rarer with only about 25 made in 70 and 8 in 71 and 20 in 72

 

[QUOTE

Also ZR1s would not have power steering due to a 6 quart oil pan. The radiator was the all aluminum GM# 3007436...the part number is stamped on top of the radiator, has no radiator cap but has a hose that connects to an external aluminum surge tank installed on the passenger side inside fender. This feature is not unique to ZR1s but offers enough evidence to differentiate from clones.
QUOTE]

Lt1's used a copper/brass filled from the radiator.

BTW.... ZR1's have M-22's, do not have a radio, or ignition shielding

 

Dennis,

True enough for the "regular" LT-1s, but 1970-1972 ZR-1 equipped Corvettes used an aluminum radiator with an external surge tank just as Tom (hunt4cleanair) described. In addition, The 1970 and 1971 ZR-1s were equipped with a steel fan shroud while the 1972 ZR-1 did not use a fan shroud.

Tony,

Any photos of the car or can you provide any details as to what equipment is on the car? It's tough to make any comments on what the car could potentially be based upon the information that you have given us so far.

Regards,

 

[QUOTE=Rowdy Rat]Dennis,

True enough for the "regular" LT-1s, but 1970-1972 ZR-1 equipped Corvettes used an aluminum radiator with an external surge tank just as Tom (hunt4cleanair) described. QUOTE]



Thought that's what I said. Who's car is this in the photo's?. Off road ZR1 on a california car? Guess you could have got one. Talk about oxy moron

 

If it is truely numbers matching it shouldn't be too hard to tell. ZR-1s had specific engine codes, CTV for 70, and all ZR-1s had M22. No other cars in 70 could be ordered with M22. Other unique features include the heavy duty suspension and brakes. All ZR-1s were radio delete. There should be no evidence of a radio or ignition shielding ever being installed. In addition ZR-1 could not be ordered with power windows, power steering, alarm, rear defrost, or custom wheel covers. Also, although LT-1s had no radiator expansion tank I think that ZR-1s did. As for value, I've seen few for sale. I would think the value would be significantly more than LT-1s. I'm just guessing, but I'd think at least $10-15k more than a similar LT-1.