Forum: C4 ZR-1 Technical Postings
10 Hours Ago
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Replies: 10
Views: 325
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Forum: C4 ZR-1 Technical Postings
15 Hours Ago
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Replies: 16
Views: 5,247
Re: Minimum Air Idle Adjustment
U want enough IAC steps so ECM has room to ?catch? idle drop, but not too many steps to where most of idle air is coming thru IAC opening. I typically shoot for 10-15 steps. One other step I do is to...
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Forum: C4 ZR-1 Technical Postings
1 Day Ago
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Replies: 10
Views: 325
Re: Best sounding cams
Yes it is. The video was b4 tuning. Makes u think of what GM could have done continuing to develop that platform. Its the way it should have come from the factory.
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Forum: C4 ZR-1 Technical Postings
1 Day Ago
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Replies: 10
Views: 325
Re: Best sounding cams
The sound of a cammed SBC is due to the necessity for high lift/ long duration to get the breathing. 4 valves do that for the LT5, so cam profile can be relatively mild in comparison for similar or...
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Forum: C4 ZR-1 Technical Postings
5 Days Ago
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Replies: 10
Views: 325
Re: Best sounding cams
Stage 1 Dr. Greekenstein cams, fully ported, headers, Xpipe, Magnaflow muffs w C6 Z06 NPP valves.
https://youtu.be/LYgBSTyLd9I?si=MGVLn-aDQA3kmJEn
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Forum: C4 ZR-1 General Postings
2 Weeks Ago
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Replies: 19
Views: 1,521
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Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 39
Views: 2,784
Re: Code 61 with secondary system removed?
I believe u are way ?overthinking? this. If ur objective is to keep the secondaries open in all conditions except idle and decel, then what was sent is what is working for many users. U will likely...
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Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 39
Views: 2,784
Re: Code 61 with secondary system removed?
Here's the conversion formula in the .xdf I have w the values calc'd from a stock $F0 BKKR bin. That's the conversion formula in the .xdf I sent you Brian.
The 10 and 104 value are what Haibeck uses...
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Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 39
Views: 2,784
Re: Code 61 with secondary system removed?
Todd,
I?ve not seen anything in the calibration to allow for two injectors ON in idle conditions. My sense is that altho the PW is halved between the two injectors,
Idle would require a PW that...
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Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 39
Views: 2,784
Re: Code 61 with secondary system removed?
You are giving the ECM conditions that it will virtually never see for it to close the secondaries. This also assumes u have the calibration set for FULL POWER always being ON. Finally I have my...
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Forum: C4 ZR-1 General Postings
3 Weeks Ago
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Replies: 19
Views: 1,521
Re: Aftermarket Head Unit Question
IIRC, I ran the wire down the left side under the door sill coverup into the hatch area where I did drill a small hole that gave me access to the area under the rear bumper cover. I made a small...
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 39
Views: 2,784
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 39
Views: 2,784
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Forum: C4 ZR-1 General Postings
3 Weeks Ago
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Replies: 19
Views: 1,521
Re: Aftermarket Head Unit Question
I installed a Pioneer AppRadio4 several years ago.No issue w fitting into stock radio opening. I love the iOS connectivity and added backup camera.
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Forum: C4 ZR-1 Technical Postings
05-14-2024
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Replies: 10
Views: 1,716
Re: High idle
I had that issue some years ago. My TB is bored to 63mm. I ended up buying Marc?s ?helper spring?. After all these years the return spring loses some of its closing power. Haven?t had that issue...
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Forum: C4 ZR-1 Technical Postings
05-14-2024
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Replies: 6
Views: 784
Re: Racetronix Injectors - any good?
Whichever injectors u select, I would highly recommend having them flow tested and then match the pairs. That made a significant difference for me in terms of idle, cruising smoothness, and mpg after...
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Forum: C4 ZR-1 Technical Postings
05-12-2024
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Replies: 4
Views: 635
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Forum: C4 ZR-1 Technical Postings
05-07-2024
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Replies: 11
Views: 2,078
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Forum: C4 ZR-1 Technical Postings
05-07-2024
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Replies: 11
Views: 2,078
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Forum: C4 ZR-1 Technical Postings
05-01-2024
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Replies: 18
Views: 4,001
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Forum: C4 ZR-1 Technical Postings
04-29-2024
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Replies: 18
Views: 4,001
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Forum: C4 ZR-1 General Postings
04-28-2024
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Replies: 6
Views: 1,899
Re: Dyno rip of 1994 #15
Graham,
Was it the puffs of smoke that gave it away for knock? My experience is that if there is detonation it likely occurs between 4500-5500rpm on a WOT pull.
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
04-26-2024
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Replies: 8
Views: 2,611
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Forum: C4 ZR-1 Technical Postings
04-16-2024
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Replies: 3
Views: 1,002
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Forum: C4 ZR-1 General Postings
04-10-2024
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Replies: 185
Views: 68,815
Re: Best Sounding Exhaust for the ZR-1
I don?t recall exactly. Its either the 12288 or the 12198. Both are SS dual 2.5?outlet/3? center inlet. The 288 is 14in. length and the 198 is 18in. I believe I may have used the 288s.
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