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Electronic Spark Timing (EST)

 
homer4555
V-6 Camaros rule!
Posts: 40
Joined: 12/08
Posted: 12/08/08 09:56 PM

Will a EST unit work on a vehicle outfitted with a V8 if originaly equiped for a V6,  if so, what other modifications/changes should be made.  

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chevelle83
I have an SS396 tatoo
Posts: 442
Joined: 10/08
Posted: 12/09/08 05:06 PM

what vehicle are you working on?  

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homer4555
V-6 Camaros rule!
Posts: 40
Joined: 12/08
Posted: 12/09/08 08:15 PM

87 chevy Pick up  

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homer4555
V-6 Camaros rule!
Posts: 40
Joined: 12/08
Posted: 12/09/08 08:22 PM

I want to swap out the 4.3L V6 for a 5.7L V8, but Im tring to keep from changing the computer, or wiring harness.  Someone told me to just change the PROM computer chip to read for a 5.7L.  Is it that Easy????  

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55Guy
Administrator
Posts: 1153
Joined: 07/06
Posted: 12/10/08 06:31 AM

You have to change the computer box, the V-6 box is different from a V-8 box.

Changing the engine compartment wiring harness is easy, it plugs into the firewall. Just find an '87-'96 V-8 truck and get the engine compartment harness, and get the computer box for an '87 350 truck.  

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