vehicle techies

Started by Kamakazi, September 17, 2008, 09:50:14 PM

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Kamakazi

September 17, 2008, 09:50:14 PM
alright, now where to begin.  i have a 1989 chev shortbox 4x4.  i have cooked the current 305tbi in it.  i have purchased a 1991 350tbi.  i have the necessary ecu for the 350 from another one of my vehicles.  but my question is:  is there really a difference between the 305 ecu and 350 ecu?  are they the same?  i have this feeling that only the tb is different to increase the amt of fuel to prevent leaning.   by looking at the system, i have the feeling the ecu just uses the 02 sensor to monitor the fuel rate.  heck i dont even think the engine monitors how much air the engine gets.  am i wrong with my assumptions?  if anyone can shed a light on my situation, i am all ears. :grin_nod:
98% of north americans that hit the ditch say "oh shit", the other 2% are from saskatchewan and say "hold my beer and watch this"


UncleBeaner

#1
September 17, 2008, 09:52:36 PM
Quote from: kamakazi on September 17, 2008, 09:50:14 PM
alright, now where to begin.  i have a 1989 chev shortbox 4x4.  i have cooked the current 305tbi in it.  i have purchased a 1991 350tbi.  i have the necessary ecu for the 350 from another one of my vehicles.  but my question is:  is there really a difference between the 305 ecu and 350 ecu?  are they the same?  i have this feeling that only the tb is different to increase the amt of fuel to prevent leaning.   by looking at the system, i have the feeling the ecu just uses the 02 sensor to monitor the fuel rate.  heck i dont even think the engine monitors how much air the engine gets.  am i wrong with my assumptions?  if anyone can shed a light on my situation, i am all ears. :grin_nod:

you are correct sir. are you building a hot rod tbi motor? i have a complete truck im parting out if you need soemthing
:beans:

Kamakazi

#2
September 17, 2008, 10:04:10 PM
im correct about the ecu :clap:.  apparently there are a handful of sensors that are cubic inch dependant but other than that its a straight bolt in.  im doing a rv cam, springs(retainers and locks of course), roller rockers, pushrods, lifters, timing gears, all new gaskets and head bolts.  as well as ceramic headers and  ??? hopefully side pipes.  im looking for interior pieces though :grin_nod:
98% of north americans that hit the ditch say "oh shit", the other 2% are from saskatchewan and say "hold my beer and watch this"


UncleBeaner

#3
September 17, 2008, 10:09:57 PM
Quote from: kamakazi on September 17, 2008, 10:04:10 PM
im correct about the ecu :clap:.  apparently there are a handful of sensors that are cubic inch dependant but other than that its a straight bolt in.  im doing a rv cam, springs(retainers and locks of course), roller rockers, pushrods, lifters, timing gears, all new gaskets and head bolts.  as well as ceramic headers and  ??? hopefully side pipes.  im looking for interior pieces though :grin_nod:

what color i have a complete mint tan interior for that style. why not do a lt4 build up. i found a great write up on let me find it
:beans:

UncleBeaner

#4
September 17, 2008, 10:15:05 PM
:beans:

Kamakazi

#5
September 17, 2008, 10:21:06 PM
awesome read, still goin through it but i know most of my questions will be answered
98% of north americans that hit the ditch say "oh shit", the other 2% are from saskatchewan and say "hold my beer and watch this"


UncleBeaner

#6
September 17, 2008, 10:25:14 PM
feel free to ask anything you need. ive messed with a lot of these motors
:beans:
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