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Old Jul 19, 2006 | 01:56 AM
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madman89's Avatar
madman89
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Joined: Jun 2005
Posts: 26
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From: central new york
Car: 1989 iroc z
Engine: 305 tpi
Transmission: 700r4
prom question
hey if i swap a 350tpi into my 305 tpi i know i need to chang the prom in the ecm. but is it necessary to change the ecm? also this might be a stupid question but where is the ecm located to swith the prom?
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Old Jul 19, 2006 | 02:30 AM
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firebirdjosh
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Joined: Oct 2004
Posts: 3,361
Likes: 1
From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Yes, you need a new prom. Its under the passenger side dash tucked way up near the A pillar.
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Old Jul 20, 2006 | 12:30 AM
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8Mike9's Avatar
8Mike9
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Joined: Jul 1999
Posts: 5,183
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Stock vs Stock, you need a different PROM, Knock sensor and injectors.
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Old Jul 20, 2006 | 12:45 AM
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madman89's Avatar
madman89
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Joined: Jun 2005
Posts: 26
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From: central new york
Car: 1989 iroc z
Engine: 305 tpi
Transmission: 700r4
would i need a different fuel pump as well?
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Old Jul 20, 2006 | 06:34 AM
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Fast92RS
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Posts: 600
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From: Old Bridge, NJ
Car: 1992 Camaro RS
Engine: 383 SuperRam
Transmission: 4L60
Axle/Gears: 3:23 Posi
Same fuel pump, but if you plan on making more power I would recomend a new walboro pump.
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