Forum: C4 ZR-1 Technical Postings
20 Hours Ago
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Replies: 22
Views: 732
Re: Code 61 with secondary system removed?
Btw, to default the valet key to full power in 91+, it requires a one byte change in the program (not a calibration variable). When the ecu initializes at startup, you have to clear a bit (or set...
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Forum: C4 ZR-1 Technical Postings
20 Hours Ago
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Replies: 22
Views: 732
Re: Code 61 with secondary system removed?
Dom, you have to change it in the program code (not the calibration). It?s an instruction change to open at or above zero tps. As stock the instruction is ?above? zero. Is it necessary? No. But...
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Forum: C4 ZR-1 Technical Postings
1 Day Ago
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Replies: 22
Views: 732
Re: Code 61 with secondary system removed?
Scorp, if the light is on straight away then it?s likely already programmed to default to full power.
You should have a 1D table in your xdf file for port throttle open tps % versus rpm. That?s...
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Forum: C4 ZR-1 Technical Postings
1 Day Ago
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Replies: 22
Views: 732
Re: Code 61 with secondary system removed?
Dom, if somebody wanted to run the second injectors at zero tps, that?s possible too. I think it?s just one branch instruction (from >, to >=). Not that there is a compelling need to do that, but...
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Forum: C4 ZR-1 Technical Postings
1 Day Ago
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Replies: 22
Views: 732
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Forum: C4 ZR-1 Technical Postings
5 Days Ago
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Replies: 22
Views: 732
Re: Code 61 with secondary system removed?
I recommend not just turning the flags off but changing the voltage thresholds themselves also. There is a max vac for open and min for close, if I recall . I don?t have my notes right now though....
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Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 22
Views: 732
Re: Code 61 with secondary system removed?
scorp, those diagnostics are looking for min and max voltages at the port throttle vacuum sensor. They need to be changed if you have removed throttles and vac sensor.
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 18
Views: 3,015
Re: Is there a $F0 source/assembly file anywhere?
If I remember, the "ANHT" hac was more closely related to the LT5 code at the time. It almost seemed like the various operating code sections were pulled from a menu and inserted into whatever...
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 18
Views: 3,015
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 18
Views: 3,015
Re: Is there a $F0 source/assembly file anywhere?
Many many years ago I made a complete, fully commented disassembly of BFXB, and BMCB. Had the others partially complete but moved on to other things. Had full access to the source code to add,...
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 18
Views: 3,015
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
03-04-2024
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Replies: 0
Views: 170
FS- New RAM dual disc setup
FS: BNIB Ram force 9.5 dual disc clutch kit from Jerry's Gaskets. This is the organic friction disc version for 93-95 models. Includes lightweight billet aluminum flywheel. Never installed....
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
02-06-2024
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Replies: 7
Views: 579
Re: CP big bore 427 CDI pistons
I recognize those. Those were ordered for the original big bore motor that AES did for me back in 2009. They messed it up and didn?t order the valve reliefs I specified. Therefore they had to...
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Forum: C4 ZR-1 Technical Postings
10-15-2023
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Replies: 9
Views: 2,103
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
09-12-2023
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Replies: 0
Views: 364
Lightweight or DLC coated lifters
I bought extra sets of cam followers/lifters for some recent projects to get the unit cost down. As a result, I am offering these for sale:
VW/ Audi lightweight hydraulic followers. Made by INA...
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Forum: C4 ZR-1 General Postings
07-15-2023
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Replies: 0
Views: 428
GM dealer service records
Anybody have access to GM dealer service records? I have a 95 engine with unknown history but we know it was a warranty replacement early in its life. Have a VIN, but no way to lookup service...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
06-30-2023
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Replies: 0
Views: 348
WTB- 4.00" crankshaft
I am looking for a 4.00" stroke Bryant or Moldex crankshaft. If anyone has one they are willing to part with, please hit me up.
Todd
Pepmeierengines@yahoo.com
Sent from my iPhone using...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
05-26-2023
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Replies: 3
Views: 1,080
Re: Garage Sale
All the 4-bolt parts are now sold.
Thanks,
Todd
Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
05-21-2023
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Replies: 3
Views: 1,080
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
05-11-2023
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Replies: 3
Views: 1,080
Garage Sale
Garage Sale.... I am clearing out the shop. Let me know your interest.
-- Brand new 93-95 4-bolt factory block. Maybe the last one around? $2450
-- Brand new 93-95 front cover. $350
-- Brand...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
04-11-2023
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Replies: 0
Views: 292
New hardware order
Group buy for a) head studs $$1650, b) main studs 2-bolt $650, 4-bolt $1200.
Perimeter studs in stock also.
Todd
Sent from my iPhone using ZR-1 Net Registry...
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Forum: C4 ZR-1 Technical Postings
03-23-2023
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Replies: 3
Views: 835
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Forum: C4 ZR-1 Technical Postings
02-23-2023
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Replies: 18
Views: 2,874
Re: Secondaries indicator?
Nice work. I?ve also always wondered if the Full Power lamp is still in place on the later cars.
Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
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Forum: C4 ZR-1 Technical Postings
10-28-2022
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Replies: 9
Views: 978
Crankshaft cup plugs
What are your preferred methods for removing the old crank plugs and pressing in new ones? Does anyone have a tool for that?
Todd
Sent from my iPhone using ZR-1 Net Registry...
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
10-27-2022
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Replies: 3
Views: 597
Re: FS: billet camshafts
Down to my last set of cores. 2000 for the cores. Can be finished to custom specs.
Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
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