JimZRyd

Congrats on a Beautiful ride! Looks like it has been very well cared for !

Jim

Dominic Sorresso

We have a strong population of ZRs here in Chicagoland and nearby. We call ourselves the FBI(Fast BoyZ of IllinoiZ). So you'll have excellent support from not only Marc but many others. Some of the fastest ZRs are right here. Good bunch of people that are always pushing the envelope on this car. Look forward to meeting you in near future

chgc267

Jeff, Thanks again for the invite on Friday. It was great to meet you, Marc Haibeck and the others. You were a wealth of information and look forward to getting to know the rest of the Chicago guys!

Ed, mine is #3025 so it looks like ours may have been built on the same day.

It was a beautiful weekend in Chicago and I was able to enjoy taking in some of the sites. Here are a few more pics of my "new" ZR-1.

superramvette2

Nice!! I'll be joining the club when the right car comes around!

Dynomite

Very nice #3025.....I have the last 1990 sold to public #3032.
Just a heads up...you are missing the Air Injection Intake Hose

See Item #16 Minimum Restoration of a 1990 ZR-1

chgc267

Thanks for the heads up & link! Do they still make this hose or is this the only way to fix it? Looks simple enough. According to the link, this hose is "usually missing" ....Why is that? What effect does it have when it's missing?

Dynomite

That hose provides Filtered air to air injection which really only functions first few minutes after start up. I am guessing guys remove it to reduce clutter

I made up my own as cited (nice and clean straight fit). I think used hoses should be available from guys who removed Air Induction adding headers.

mike100

looks like all the air injection stuff is there to me.

Dynomite

mike100

interesting...1991-up is different. I can see why they simplified it- that's cluttered.

Dynomite

I am not even sure all 1990s are the same but I have two 1990s identical to this. Another 1990 did not have the port on the drivers side of the air filter box. I am also not sure how the original Air Injection Hose was installed.

Vette Daddy

Very nice!

phrogs

None of my 90s ever had this hose, and did not have the nipple on the aircleaner. Of my three 90s #354, 854 and 1908 did not have that.

dont recall seeing that on any of the cars I parted out over the years either 90-91 cars.

Dynomite

That would explain one of my 90's (number 2067) not having the connection on the air box......but......was that port on the side of the Air Induction Valve just left open or did it have a hose connected to it?

Two 90s did have the connection on the side of the air box with one of those having a cap on that connection. And the Air Box connection was definitely factory. White cap on Air Box Connector shown below. This is ZR-1 number 72 one of the first 90' sold to public. The other 90' with this connection was ZR-1 3032 the last 90' sold to public. Wonder what NCRS thinks about that



This is definitely one of those confusing situations. On the other 90' that did not have the connection on the Air Box (number 2067) I am not sure the port on the Air Induction Valve was open or had a hose leading somewhere. I happened to install headers and removed Air Induction on that 90' also installing the SS Air Box.

mike100

I think that 3rd port is just a vent to atmosphere when the air pump switches off. The air inlet to the electric turbine pump thing is that plastic vent with the foam filter material. Maybe GM was trying to keep it a closed system initially.

Dynomite

Whatever the purpose....apparently GM started out with it (90' number 72) and ended up with it (90' number 3032)

And it appears that number 3025 belonging to chgc267 did not have that hose or connection on the Air Box.

z06scentair

Nothing in the judging manual states it needs/should be there. #1964 does not have the hose nor the provision on the air filter housing.

Could it be a CA thing? Emission Monsters?

Dynomite

One will notice that with either 1990 (2067 or 3032) the Air Valve Connector in question is identical with a raised ring to accept a hose.

1990 (number 2067) not having the connection on the Air Box.


1990 (number 3032) with connection on Air Box.

z06scentair

Yep all that I have seen have had the barbed end to accept something, but have never seen the connection in the cleaner housing prior to the picture you posted.

Could this have been added at some point by someone?

Is this cleaner housing from an earlier L98 car?

Remember L98's were not as emissions friendly.

Only one sighting of such an animal makes me wonder.

Dynomite

No....unless someone else mixed L98 Air Boxes....but what is interesting....I have another 1990 (number 72) that is identical in terms of the Air Box Connection to the Air Box connection shown on 1990 number 3032. And.......that Connection on Air Box of number 72 had a make shift cap on it with no hose to the Air Valve....which is what started all this for me as I figured the hose was missing on number 72.

I do not recall such an Air Box connection on my L98 cars but will check.

Apologize to chgc267 for taking this thread in this direction but maybe we all can learn some things about abnormalities of the first 1990 ZR-1s. It prolly was a learning experience by GM. Some changes were obviously made in the 1991s regarding the charcoal Canister, Plenum, Injector Housings, Heads as we already are aware of.

It is also interesting chgc267 ZR-1 is one of the last ZR-1s off that assembly line in 1990 (number 3025).
A Very Nice LT5 to be sure