Advancing timing? & fox body computer upgrade?
12-14-2007, 09:46 PM
#1
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Advancing timing? & fox body computer upgrade?
I was browsing last night and came across a few posts on other forums about advancing the timing on an 87 to 95 5.0, as well as installing a fox body mass air computer into 94 and 95 gt's. Any one have any insight on either of these and how they are done? Worth it?
12-14-2007, 11:06 PM
#2
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
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RE: Advancing timing? & fox body computer upgrade?
to advance timing..pull the spout and bump base a few degrees no more than 14 to 15 max base and at that you'll have to run premium gas or it may ping..as far as the ecm swap on a 94-95....Pro-M I believe sells a complete wire harness conversion kit that allows you to use a 89 -93 ecm that is mass air capabile and I believe when I looked into this a while back...you'll need a 87-93 dizzy with tfi module on the side and a accompanying IAC too and there may be one or two more things too...contact PRO-M and the guy there will tell you all you need
12-15-2007, 12:29 AM
#4
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
RE: Advancing timing? & fox body computer upgrade?
the sn-95 ecm's were very sensitive to performance changes such as cams and were programmed like such to comply with tighter emissions laws that were put into effect at the time...using a mass air fox ecm allows a greater variety of cam swaps without the ecm's sensitivity to overcorrect for such changes inturn causing drivibility/idle issues
12-15-2007, 02:32 PM
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RE: Advancing timing? & fox body computer upgrade?
ORIGINAL: mjr46
to advance timing..pull the spout and bump base a few degrees no more than 14 to 15 max base and at that you'll have to run premium gas or it may ping..as far as the ecm swap on a 94-95....Pro-M I believe sells a complete wire harness conversion kit that allows you to use a 89 -93 ecm that is mass air capabile and I believe when I looked into this a while back...you'll need a 87-93 dizzy with tfi module on the side and a accompanying IAC too and there may be one or two more things too...contact PRO-M and the guy there will tell you all you need
to advance timing..pull the spout and bump base a few degrees no more than 14 to 15 max base and at that you'll have to run premium gas or it may ping..as far as the ecm swap on a 94-95....Pro-M I believe sells a complete wire harness conversion kit that allows you to use a 89 -93 ecm that is mass air capabile and I believe when I looked into this a while back...you'll need a 87-93 dizzy with tfi module on the side and a accompanying IAC too and there may be one or two more things too...contact PRO-M and the guy there will tell you all you need
12-15-2007, 02:37 PM
#7
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Join Date: Oct 2006
Location: Florida
Posts: 371
RE: Advancing timing? & fox body computer upgrade?
The spout is right by the distributor on the end of a small group of wires, if you are not sure how to tell where the timing is, it might be a good idea to have someone who has done it before help you, then you will know.
12-15-2007, 04:28 PM
#8
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RE: Advancing timing? & fox body computer upgrade?
You'll need a half inch socket, a timing light and a Chilton's manual. And yes, advancing the timing can be abig hp upgrade or a tiny one, depending on where the base timing is set now. Mine was set at 6* from the factory, and I gained what felt like 15-20 hp advancing it to 14*. Then summertime came around, and I quickly learned that 14* was too much for my car. 11* is about all she'll take in hot weather, so I leave it set there. Everyengine is a little different in this regard. Good luck.
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