Forum: C4 ZR-1 Technical Postings
12-15-2024
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Replies: 6
Views: 903
Re: Slave cylinder piston
It sounds to me like the pushrod for the slave missed the pocket in the clutch fork. Without anything to push against, the slave over extended and pushed out the piston.
There's 2 options on the...
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Forum: C4 ZR-1 Technical Postings
10-25-2023
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Replies: 12
Views: 8,095
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 12
Views: 5,645
Re: Mediocre A/C
I didn't read the entire thread, apologies if I'm regurgitating something that's been said already:
I've noticed the AC on mine works great at first, but the blower motor slowly loses oomph over...
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Forum: C4 ZR-1 Technical Postings
10-23-2023
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Replies: 12
Views: 8,095
Re: Limits of stock LT5 with boost?
Is that an issue with ethanol based fuels; IE pump E85?
I've tuned a couple hundred turbo charged V8 applications on my dyno and have never been able to push an ethanol based fuel into knock...
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Forum: C4 ZR-1 Technical Postings
09-07-2023
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Replies: 12
Views: 8,095
Re: Limits of stock LT5 with boost?
I appreciate it guys, thanks! If the head gaskets were resolved, anyone have an idea of what the next failure might be?
I'd like to talk to Grahm if possible, is he a member here? I met him...
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Forum: C4 ZR-1 Technical Postings
09-06-2023
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Replies: 12
Views: 8,095
Limits of stock LT5 with boost?
Is there a known failure mode when pushing a stock LT5 engine?
In a turbocharged application, if you kept turning up the boost / power until something broke, what do you think would fail?
What...
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Forum: C4 ZR-1 General Postings
11-21-2022
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Replies: 8
Views: 1,599
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Forum: C4 ZR-1 General Postings
11-20-2022
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Replies: 8
Views: 1,599
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Forum: C4 ZR-1 General Postings
08-12-2021
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Replies: 8
Views: 1,205
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Forum: C4 ZR-1 General Postings
08-12-2021
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Replies: 8
Views: 1,205
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Forum: C4 ZR-1 General Postings
08-11-2021
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Replies: 8
Views: 1,205
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Forum: C4 ZR-1 General Postings
08-11-2021
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Replies: 8
Views: 1,205
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Forum: C4 ZR-1 Technical Postings
08-11-2021
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Replies: 3
Views: 1,008
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Forum: C4 ZR-1 General Postings
08-11-2021
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Replies: 112
Views: 15,084
Re: Dyno Sheet Petition
I?m interested in a skunkworks style recovery mission of the data. Someone shoot me a message if clandestine skulduggery becomes an option.
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Forum: C4 ZR-1 Technical Postings
06-15-2020
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Replies: 38
Views: 6,254
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Forum: C4 ZR-1 Technical Postings
06-15-2020
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Replies: 38
Views: 6,254
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Forum: C4 ZR-1 Technical Postings
06-14-2020
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Replies: 38
Views: 6,254
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Forum: C4 ZR-1 Technical Postings
06-14-2020
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Replies: 20
Views: 8,662
Re: Rear main puking oil?
Around those years, the rear covers on LS engines had a casting porosity issue, the oil would ocassionally wick through the aluminum rear cover. I have only encountered the issue on 2010 and 2011...
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Forum: C4 ZR-1 Technical Postings
06-14-2020
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Replies: 6
Views: 4,554
Re: Clutch fluid a little low
For your third gear issues, this is from Bill at zfdoc.com:
Q) On my car I can power shift 2nd and 4th, but I'm having problems with 3rd. During normal driving going to 3rd does not feel as smooth...
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Forum: C4 ZR-1 Technical Postings
06-14-2020
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Replies: 6
Views: 4,554
Re: Clutch fluid a little low
Depending on the style of rubber gasket beneath your clutch fluid reservoir cap, that level may be alright. One style of rubber seal has a large cup that sits down into the reservoir; if that's what...
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Forum: C4 ZR-1 Technical Postings
06-08-2019
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Replies: 10
Views: 21,290
Re: Freon capacity for 91 ZR-1?
My FSM is tucked away in the attic with the other top to the car. I need to just go get the ladder and bring the FSM down - it doesn't do any good to anyone up in the rafters.
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Forum: C4 ZR-1 Technical Postings
06-08-2019
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Replies: 10
Views: 21,290
Freon capacity for 91 ZR-1?
I've been all over the web, and for whatever reason I can't seem to get an answer as to how much refrigerant (R12) my 91 ZR-1 will hold. I've checked the various stickers under the hood, none of...
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Forum: C4 ZR-1 General Postings
04-06-2019
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Replies: 31
Views: 2,801
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Forum: C4 ZR-1 General Postings
09-06-2018
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Replies: 14
Views: 1,717
Re: Took my 91 ZR-1 to the dyno today
It is a DRM 475 car. However, it's missing the headers that normally come with that package. I'm not sure how much power is being left on the table by continuing to use the stock exhaust manifolds....
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Forum: C4 ZR-1 General Postings
09-05-2018
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Replies: 14
Views: 1,717
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