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Old 12-13-2016   #21
-=Jeff=-
 
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Join Date: Jul 2007
Location: Bartlett, IL
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Default Re: Stereo Upgrade Options

Only if you have C60 will it definitely be an issue


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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
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Old 12-13-2016   #22
2ljd
 
Join Date: May 2016
Location: Hawaii
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Default Re: Stereo Upgrade Options

Thanks for the info!

I have the C68...some of the posts I had looked over said it was the C68 that required the resistors.
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Old 12-13-2016   #23
-=Jeff=-
 
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Default Re: Stereo Upgrade Options

TSB attacted
Attached Files
File Type: pdf radio TSB.pdf (241.9 KB, 19 views)
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
NCM Lifetime Member #978
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Old 12-13-2016   #24
2ljd
 
Join Date: May 2016
Location: Hawaii
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Default Re: Stereo Upgrade Options

Cool, thanks!

Hopefully I don't have to use it, but good to have just in case.
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Old 12-14-2016   #25
cvette98pacecar
 
Join Date: May 2011
Location: Sydney, Australia
Posts: 2,479
Default Re: Stereo Upgrade Options

Quote:
Originally Posted by secondchance View Post
Try without any resistor first. I installed Alpine unit in my 91 back in 92 and installed Pioneer Avic Z140BH in 2012. Both time I did not use any resistor and no issue.
I have now done radios in 5 C4 I have not had any issue's where I needed to install resistors. All head Units are Avic 140 or 150BH.
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Old 12-14-2016   #26
george1945
 
Join Date: Aug 2016
Location: US Oregon
Posts: 74
Default Re: Stereo Upgrade Options

Just recently bought a 90 ZR1 for my wife. Picked it up in Michigan. Went directly to Heibecks shop for injectors and a through service and check. Decided since the Boise system was needing repairs, and the car is not a collectors piece, I would upgrade. For not a lot of cash you can repair the speaker amps, put in a new technology head with auxiliary Inputs, CD/DVD, backup camera and navigation. It is so clean it looks like it came that way.Problem solved. Will put the old unit on the shelf for now. Problem solved
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Old 12-14-2016   #27
george1945
 
Join Date: Aug 2016
Location: US Oregon
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Default Re: Stereo Upgrade Options

Forgot the blue tooth etc etc etc.
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