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#1066807 - 06/14/20 01:54 PM Zz4 prom  
Joined: Nov 2007
Posts: 76
pitotes Offline
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pitotes  Offline
10+ Year
Member

Joined: Nov 2007
Posts: 76
chicago
what exactly does the zz4 prom chip do?
And does chip work with the 87,88 ss
Thanks

#1066809 - 06/14/20 02:45 PM Re: Zz4 prom [Re: pitotes]  
Joined: Aug 2007
Posts: 1,408
kevins88ss Offline
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kevins88ss  Offline
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Posts: 1,408
Southern Maine
Here's some info. I think it mostly kept off the Check Engine Light if you didn't run an EGR. Could be more to it I'm sure. Maybe Bitflipper can reply.

ZZ4 Prom Info

#1066810 - 06/14/20 03:29 PM Re: Zz4 prom [Re: pitotes]  
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Buick Runner Offline
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Buick Runner  Offline
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Dharma station 1 the Hydra
The ZZ4 chip has more aggressive timing advance and fueling curves and less aggressive spark knock retard. Overall, its a hotter tune.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1066812 - 06/14/20 04:09 PM Re: Zz4 prom [Re: pitotes]  
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pitotes Offline
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pitotes  Offline
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Joined: Nov 2007
Posts: 76
chicago
So i would see an improvement. I was just double checking.
I thought I read some where it wouldn't make much of a difference on the 87 and 88.
The 86 and lower would see improvement.

#1066813 - 06/14/20 05:17 PM Re: Zz4 prom [Re: pitotes]  
Joined: Jun 2004
Posts: 365
Bitflipper Offline
15+ Year
Bitflipper  Offline
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Joined: Jun 2004
Posts: 365
Las Vegas, NV
Not much more to say other than the for sale link. There are only a few left.

Customized ZZ4 EPROMs for sale


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