C4 Zr-1

[Ron L.]

Re: C4 Zr-1

Ron,

Those black hats go crazy over the oil filter on a ZR-1. Better be original or they will faint!

JR

Are you serious?? well I hope its out on the grass then ..'cause they will be fainting.

[Ed H.]

Re: C4 Zr-1

Ron,

What area of the country do you live. I took my 93 to a Central Ca. chapter meet a couple of months ago, and the talent was very good. A number of C-4 master judges worked on my car, the deducts were right in line with the 2007 Regional in Leavenworth, Wa. You must have your car test PV'd prior to presenting. I went all the way to Denver in May, 08, and failed. It was my fault for assuming all was well.

[Ron L.]

Re: C4 Zr-1

Ron,

What area of the country do you live. I took my 93 to a Central Ca. chapter meet a couple of months ago, and the talent was very good. A number of C-4 master judges worked on my car, the deducts were right in line with the 2007 Regional in Leavenworth, Wa. You must have your car test PV'd prior to presenting. I went all the way to Denver in May, 08, and failed. It was my fault for assuming all was well.

\

You have to go thru PV nowdays before flight judging?? When did that start?

[Bill M.]

Re: C4 Zr-1

\

You have to go thru PV nowdays before flight judging?? When did that start?

Translation: You should test your car for a PV before you actually present the car for the PV test.

Make sure you discuss what to do for the PV with the Team Leader when you do your Regional. One example: the hatch struts need to be original for Flight Judging for full credit. They don't have to work perfectly. For the PV, they must work just like the day the car was new. You can substitute new ones for the PV; they don't have to be original.

[Ron L.]

Re: C4 Zr-1

Oh ok. Got it. I was gonna say, if you need a PV before Flight , alot of cars are gonna get bounced.

Ive ordered the maunals, etc. Its been like 12 years since ive done any NCRS stuff. Alot will come back quick to me. Some wont.

The car only has 4800 miles on it. Im sure its not gonna get 100%, but its so virgin, it would be hard to screw up too bad. I dont think the bladders work in the lumbar, and I need to replace the short side hood latch cable. What a piece of $&^# that design is. 60K for a car and they put that in for a latch release?? The battery is a replacement, but other than that, shes factory, including the tires. (hard as rocks)

That reminds me, can you get a correct battery nowdays?

[Tyler T.]

Re: C4 Zr-1

Ron,

Those black hats go crazy over the oil filter on a ZR-1. Better be original or they will faint!

JR

Who judges an 88 ZR-1, 84-89 or 90-93 judges? Car will be at National for its American Heritage award, it was reviewed at Winter regional and invited to National. It will be a long haul from Florida but it will give you West coasters a chance to see the oldest surviving ZR-1 built May/June 1987.

Tyler

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[Jim T.]

Re: C4 Zr-1

Reference the position of the oil filters on the ZR-1. Does the oil drain into the crankcase after the engine is shut off or is the filter the type that has a valve to prevent this?
What technique do ZR-1 owners use to keep from having a mess to clean up with each filter change?

[Bill M.]

Re: C4 Zr-1

The car only has 4800 miles on it. Im sure its not gonna get 100%, but its so virgin, it would be hard to screw up too bad. The battery is a replacement, but other than that, shes factory, including the tires. (hard as rocks)

That reminds me, can you get a correct battery nowdays?

My 18,000 mile '92 LT1 I had a replacement oil filter, battery, and windshield (ZR1 in an LT1!) and scored 97.6 at the Michigan Regional. I figure that I could get to about 99 if I fixed all the fixable issues. (I started at the Regional because the Michigan Chapter didn't have a Chapter meet in 2008.) Your car should do better; I lost half the windshield originality points.

Make sure you check your back-up lights. Mine used to work, but not at the Regional (a common 6-speed issue). You get bonus points for an NCRS decal, fire extinguisher, and battery switch. A C4 expert at the Michigan Regional suggested using a knife-blade type switch. I found one on-line made by Wirthco.

I haven't seen a correct battery available. Some experienced judges (who bought their C4s new) saved their original batteries and oil filters...

[Ed H.]

Re: C4 Zr-1

Ron,

Remember I said I failed my PV at Denver. The problem was both (R/L) lumbar inflation units. The motor has a very thin rubber piece that pumps the air into the lumbar units (3). MidAmerica has this part for little money. Removing and replacing is not difficult. I would purchase the two shop manuals from Chevrolet (1-Mech 2-Elec) The oil filter (PF-970C) is black. The label is grey with black letters, and has no bar code on the label. These are hard to find, but not impossable. I put my filter on, after my car has at least 8 hours of non driving time. This allows all the oil to drain back into the crankcase. Once home I remove the filter for the next judging round. Make sure your windshield wipers are original. the tips should look like the head of an arrow that has a rounded tip. Is your windshield delaminating around the edges. This is common in all ZRs. Take your hit and forget trying to replace it. The cost per judging point is not worth it. If you want some fun reading, find and purchase the book "Heart of the Beast", you will love it. Some great photos. I found mine on amazon.

[Terry M.]

Re: C4 Zr-1

Tyler -- for the American Heritage no judging team judges the car. Relax, you don't have to force a square peg into a round hole.

[James C.]

Re: C4 Zr-1

I have a 1990 Red on Red ZR-1. Scored 98.6. Docked for battery, floor mats? and a little oil and grease on engine. This car was well ahead of it's time from a technology prospect. All motor, no supercharger needed to get incredible performance. Jim

[Mark K.]

Re: C4 Zr-1

Are there many C4 Zr-1 owners in NCRS? I just bought a 4000 mile one thats a total time warp. Original everything, including the air in the tires.
It was locked away in a garage. (wonder if the tires which still have the nubs on them are any good. they arent cracked)

Going to try and prep it for maybe a judging deal this summer. Just wondered who all out there on this site is into these cars?

Its been like 10 or 12 years since I let my membership lapse,and sold my car) but now I re-upped and plan to get back into it.

I'm one of the 896 ZR-1 owners that NCRS won't judge (yet). I purchased my 95 ZR-1 last August. It's a red/red double Dunn head car with about 4500 miles. It really is a blast to drive. In acceleration it feels quite similar to my 67 435. Good luck with your Z, at some point they will be recognized as the great cars they are.

PS - Anyone know when the 94-96s will become NCRS eligible?

[Tyler T.]

Re: C4 Zr-1

Tyler -- for the American Heritage no judging team judges the car. Relax, you don't have to force a square peg into a round hole.

They looked at it real hard in Jan. Missed you this year.

Tyler

[Tyler T.]

Re: C4 Zr-1

Reference the position of the oil filters on the ZR-1. Does the oil drain into the crankcase after the engine is shut off or is the filter the type that has a valve to prevent this?
What technique do ZR-1 owners use to keep from having a mess to clean up with each filter change?

There used to be a anti drain back filters available but they have been discontinued. I let the car set overnight to drain before changing the oil. Also have some paper towels avail.

Tyler

[David M.]

Re: C4 Zr-1

Hi Ron, I own the 90 ZR-1 That was parked next to Bill Clupper's car in Marlborough in 2007 for Crossed Flags judging. There are plenty of people here that know ZR-1s. You should also check out www.zr1.net for Info. Good luck with the car.
Dave