Forum: C4 ZR-1 Technical Postings
11-15-2023
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Replies: 4
Views: 1,700
02 Sensors
For my LT 5/Camaro project I need two O2 sensors. The O2 sensor on the passenger side interferes with the oil pan on my 700 R4 transmission. I am looking for a shorter sensor. Who makes the best...
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 6
Views: 1,168
Re: Engine knock
Thank you Graham. Yes, the original flywheel, clutch and transmission have been removed and replaced with a flex plate and 700 R4 transmission. I?ve tried several times to download a video with...
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 6
Views: 1,168
Re: Engine knock
Thank you for your replies. Internally, the motor is stock. It does have the secondary delete modification, and long tube headers. Mark has provided calibrations for those.
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 6
Views: 1,168
Engine knock
I have been doing research on this subject, but have not come up with anything definitive. This motor came from a wrecked 91 ZR1 with only 17,000 miles on the odometer. It has been transplanted into...
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Forum: C4 ZR-1 Technical Postings
09-30-2023
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Replies: 9
Views: 2,090
Re: LT5 Crank to Flywheel bolt pattern ??
Way back in 2010, I needed a flex plate for my LT5 in a 67 Camaro project I was doing. I was installing a 700R4 transmission behind it. At that time, a company called Street and Performance, which I...
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Forum: C4 ZR-1 Technical Postings
09-20-2023
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Replies: 9
Views: 1,512
Re: Blue/Black ZF6 labels
Thank you all for the replies. So it seems there isn?t much difference in the two labels other than year specific. Possibly the black label is more desirable. Any ideas on the value of my...
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Forum: C4 ZR-1 Technical Postings
09-18-2023
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Replies: 9
Views: 1,512
Blue/Black ZF6 labels
Can somebody explain the differences between blue and black ZF6 speed transmission labels? Which is better or more desirable? I have a 91 ZR1 transmission with black label that was removed from a...
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Forum: C4 ZR-1 Technical Postings
09-16-2022
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Replies: 26
Views: 3,260
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Forum: C4 ZR-1 General Postings
09-03-2022
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Replies: 2
Views: 719
Re: ZR-1 sticker
That would be awesome. I will take some measurements tomorrow and get back to you. Thank you for your offer.
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Forum: C4 ZR-1 General Postings
09-01-2022
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Replies: 2
Views: 719
ZR-1 sticker
I believe I?ve purchased this vinyl sticker on this site but I?ll be darned if I can find it again. It?s been several years. Does anybody know where I can buy this ZR1 sticker?
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Forum: C4 ZR-1 Technical Postings
05-26-2022
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Replies: 4
Views: 616
Re: which gas
Yes, I mean regular 91 octane with ethanol. My injectors have been replaced with Jerry's FIC units. I don't have cats on the car as this motor is in a 67 Camaro. The problem with ethanol gas is it...
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Forum: C4 ZR-1 Technical Postings
05-26-2022
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Replies: 4
Views: 616
which gas
In my area, I have three choices of gasoline, Ethanol based 91 octane, non- ethanol 87 octane, and 100LL Avgas. Which would be the best fuel to use in my stock '91 LT5 that doesn't get driven a lot?...
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Forum: C4 ZR-1 Technical Postings
04-05-2022
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Replies: 4
Views: 730
Fuel Pressure. Where does it go?
I have a fuel pressure gauge installed on the fuel log at the schrader valve location. When the key is switched on, the pump (yes, singular) turns on and the gauge reads 43 psi. Without starting the...
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Forum: C4 ZR-1 Technical Postings
03-11-2022
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Replies: 49
Views: 4,490
Re: Fuel Pumps for my 92 ZR-1
I just checked with Summit and the Walbro pump that Marc suggests is out of stock at this time. It also states that the fuel pressure is only 43 psi, not the 85 psi Marc's article states. Is 43 psi...
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Forum: C4 ZR-1 Technical Postings
02-28-2022
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Replies: 18
Views: 1,804
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Forum: C4 ZR-1 Technical Postings
07-18-2021
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Replies: 21
Views: 2,198
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Forum: C4 ZR-1 Technical Postings
04-12-2021
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Replies: 7
Views: 1,338
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Forum: C4 ZR-1 Technical Postings
04-10-2021
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Replies: 7
Views: 1,338
Re: Battery Disconnect
Thank you for the replies. Paul, what you said is true but I wonder why some car makers say to connect another power source to the car when replacing batteries. Is it to simply keep the radio and...
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Forum: C4 ZR-1 Technical Postings
04-04-2021
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Replies: 7
Views: 1,338
Battery Disconnect
I have read that disconnecting the battery for storage, the ECU will loose all it's tuning memory and that a low fused power wire should be installed to prevent this from happening.. I know the radio...
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Forum: C4 ZR-1 Technical Postings
12-06-2020
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Replies: 11
Views: 1,208
Re: Replacing Dual Mass Flywheel - balancing?
I find this very interesting. I will have to check the original dual mass flywheel/clutch/ pressure plate that I have on the shelf to see what configuration it was from the factory. I removed it from...
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Forum: C4 ZR-1 Technical Postings
09-23-2020
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Replies: 28
Views: 2,322
Re: Anything unique about a LT-5 Alternator?
I am a little confused. My alternator died so I bought a kit to rebuild it. However, after installing it, it still was not producing voltage so I replaced it with a 250 amp Powermaster unit from...
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Forum: C4 ZR-1 Technical Postings
09-21-2020
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Replies: 24
Views: 2,275
Re: O2 sensor passenger side pita
[QUOTE=mhobtr;314225]I cut the wires at the sensor and installed a new Weatherpak connector. Plugged in the new sensor and looped the wires up and out of the way and was done.
Later, when i...
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Forum: C4 ZR-1 Technical Postings
09-21-2020
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Replies: 24
Views: 2,275
Re: O2 sensor passenger side pita
That's a good idea however I was told by the experts on this forum that the O2 wires need to be open to the atmosphere so they can sense the oxygen. I had to remove the heat protection wrapping from...
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Forum: C4 ZR-1 Technical Postings
09-07-2020
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Replies: 112
Views: 11,767
Re: Extreme rich condition
I just watched the entire data log which the previous still pictures were from. The BLM's, both left and right, started out as a constant 128 but half way through the test, they jumped down to a...
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Forum: C4 ZR-1 Technical Postings
09-06-2020
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Replies: 112
Views: 11,767
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