swapping TBI 305 for TBI 350
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Joined: Jan 2002
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
swapping TBI 305 for TBI 350
besides the obvious motor swap, what will i need to change in order to keep the ECM happy? I'll be putting in a L98 that's been rebuilt with a factory cam in it. Nothing radical but the 305 is taking a crap, so i told my friend i'd swap them out. knock sensor different, different chip etc ??
Joined: Feb 2001
Posts: 13,777
Likes: 567
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by Benm109
IIRC, you need a 350 knock sensor, a 350 ESC module, and a 350 PROM/chip.
IIRC, you need a 350 knock sensor, a 350 ESC module, and a 350 PROM/chip.
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iTrader: (5)
Joined: Jan 2002
Posts: 13,622
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
350 prom chip out of caprices or ....?
any particular number that i'm looking for when looking through the yards? the 350 injectors are just a higher flow rate but same size. does it matter from a truck or car engine?
any particular number that i'm looking for when looking through the yards? the 350 injectors are just a higher flow rate but same size. does it matter from a truck or car engine?
Joined: Feb 2001
Posts: 13,777
Likes: 567
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by xpndbl3
350 prom chip out of caprices or ....?
any particular number that i'm looking for when looking through the yards? the 350 injectors are just a higher flow rate but same size. does it matter from a truck or car engine?
350 prom chip out of caprices or ....?
any particular number that i'm looking for when looking through the yards? the 350 injectors are just a higher flow rate but same size. does it matter from a truck or car engine?
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Joined: Mar 2004
Posts: 349
Likes: 1
From: CO
Car: 1990 Firebird
Engine: LS3
Transmission: 4L60E
I don't mean to hijack
how big of a differance does a 350 esc make vs a 305 esc? and who sells them cheap? the cheapest I've seen is GMPartsDirect.com for about fifty bucks.
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Joined: Mar 2002
Posts: 2,467
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From: The nation's capital
Car: 91 RS
Engine: 350 TBI
Transmission: 700R4
Also, don't forget to buy a nice aluminum bat to beat the snot out of your engine with.
Sorry, just venting because of my 3 month long engine swap.
Sorry, just venting because of my 3 month long engine swap.
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Joined: Aug 2004
Posts: 4,168
Likes: 3
From: Marietta, GA
Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks
Originally posted by Gunny Highway
Sorry, just venting because of my 3 month long engine swap.
Sorry, just venting because of my 3 month long engine swap.
Ugh.
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