Forum: C4 ZR-1 Technical Postings
5 Days Ago
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Replies: 13
Views: 365
Re: 90' Intermittent power - Spark problem
From what I gather, you say that the spark on #5 looks/sounds like it's more frequent than any of the adjacent cylinders at any given RPM, and provides no change to RPM when unhooked?
That coupled...
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Forum: C4 ZR-1 Technical Postings
6 Days Ago
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Replies: 2
Views: 205
Dreaded Upper Cam Chain Guide Failure
Last time I did my yearly oil change (a couple months after the pandemic hit,) I discovered steel glitter in the oil. I parked the car, set it up for hibernation, and haven't driven it since (except...
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Forum: C4 ZR-1 General Postings
6 Days Ago
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Replies: 77
Views: 27,877
Re: Mileage
Can't turn the ignition on right now to check. Haven't driven it in quite a while. Last time I looked, I think it was nearing 170,000mi. Marc went through the engine at around 124k, so does it still...
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Forum: C4 ZR-1 Technical Postings
01-24-2025
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Replies: 16
Views: 16,539
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Forum: C4 ZR-1 Technical Postings
07-26-2023
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Replies: 5
Views: 6,029
Re: Infinity Lube
The info in the advertisement sheet says "900 degree flash point." At the bottom in the fine print it says "believed to be accurate at time of issue."
MSDS says 270 degree flash point.
False...
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Forum: C4 ZR-1 General Postings
06-19-2023
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Replies: 4
Views: 2,092
Re: LT5-Powered 1958 Corvette Restomod
Aside from the horrendous headlights, they got rid of two of the '58s most defining features, the tail lights and the sail exit exhaust. I understand the want for restomodding (fuel injection, newer...
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Forum: C4 ZR-1 General Postings
12-18-2022
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Replies: 6
Views: 1,434
Re: Road&Track June 1990 - Mid-Engine ZR-1
I believe they started on the Indy (Later called the CERVIII) in 1986.
I personally think the Indy/CERVIII was a better looking car than this Bertone concept.
I've read that one of the...
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Forum: C4 ZR-1 General Postings
12-03-2022
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Replies: 12
Views: 2,099
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Forum: C4 ZR-1 General Postings
12-02-2022
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Replies: 12
Views: 2,099
Re: Corvette to become it's own "brand"
Aside from the original subject of the article, Sean Tucker needs to rethink his job as an author. Zora did not draw up, design, or create in any way- the original Corvette. This extreme flaw in the...
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Forum: C4 ZR-1 Technical Postings
03-29-2022
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Replies: 5
Views: 4,512
Re: 92 Tire Tube - How Much Weight Can It Hold ?
It can carry more than 30lbs... keep in mind it was indended to carry a front tire and wheel (Or just any regular tire and wheel on a non-ZR-1 C4.) This is why the "tracks" in the sides of the spare...
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Forum: C4 ZR-1 Technical Postings
03-14-2022
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Replies: 69
Views: 21,083
Re: Which coil pack do you have?
I have nothing against running the factory stuff, however you're the first person I've seen who said they had problems with magnecor wires. They do come with a lifetime defect warranty. I've had a...
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Forum: C4 ZR-1 Technical Postings
02-13-2022
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Replies: 69
Views: 21,083
Re: Which coil pack do you have?
My '92 had what appeared to be an original set when I replaced my injectors in '17. They all had cracked housings. I put MSD's in and so far haven't had any problems. After seeing this thread, I...
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Forum: C4 ZR-1 Technical Postings
01-26-2022
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Replies: 9
Views: 2,317
Re: EPROMS Deteriorate?
Yeah this sounds like BS marketing. I know it's not a ZR-1, but I've got an '87 Mazda RX-7 ECU with over 230k miles on it that still works like it was new.
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Forum: C7 ZR1 General Postings
12-22-2021
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Replies: 5
Views: 5,426
Re: LT6 dyno runs
I doubt they'd waste the paper. If they do archive any data from a dyno test, it would likely be stored on a database.
Sent from my BBF100-2 using ZR-1 Net Registry mobile app...
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Forum: C7 ZR1 General Postings
12-22-2021
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Replies: 5
Views: 5,426
Re: LT6 dyno runs
Seems highly doubtful.
These initial dyno runs are more for an internal final inspection and initial run-in, not for power output 'records.' They already know what the engine is supposed to make;...
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Forum: C4 ZR-1 General Postings
11-09-2021
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Replies: 12
Views: 1,884
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Forum: C4 ZR-1 General Postings
11-09-2021
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Replies: 12
Views: 1,884
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Forum: C4 ZR-1 General Postings
11-09-2021
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Replies: 2
Views: 706
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Forum: C4 ZR-1 General Postings
11-08-2021
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Replies: 12
Views: 1,884
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Forum: C4 ZR-1 Technical Postings
09-29-2021
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Replies: 7
Views: 2,395
Re: Chattering going into 1st/Reverse
The heat checking on the flywheel and pressure plate in your photos looks like it's only on one side. I bet if you put a dial test indicator on it you'd see a fair bit of runout. Either the flywheel...
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Forum: C4 ZR-1 Technical Postings
09-29-2021
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Replies: 13
Views: 2,662
Re: Throttle body uh-oh moment...
The screws had red loctite on them when I first removed them. I can't recall having ever disassembled an automotive throttle body that didn't have some sort of retention compound on the throttle...
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Forum: C4 ZR-1 Technical Postings
09-27-2021
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Replies: 14
Views: 2,358
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Forum: C4 ZR-1 Technical Postings
09-27-2021
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Replies: 56
Views: 15,266
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Forum: C4 ZR-1 Technical Postings
09-21-2021
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Replies: 13
Views: 2,662
Re: Throttle body uh-oh moment...
Don't get the wrong idea; it was pretty tedious and time consuming. It ate up what little free time I had this past weekend. It wasn't necessarily difficult unless you're impatient (which I've been...
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Forum: C4 ZR-1 Technical Postings
09-20-2021
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Replies: 13
Views: 2,662
Re: Throttle body uh-oh moment...
Upon further inspection of the throttle body, the wear on the pin wasn't the issue. I elected to leave the pin alone and instead concentrate on the throttle bores and butterfly plates where the...
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