switching engines
Thread Starter
Senior Member
Joined: Nov 2002
Posts: 638
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Car: 89 trans am
Engine: 355
Transmission: 700r4
switching engines
hey fellas. i've got a couple questions. i've got a stock LO3 305 (tbi for those who don't know off hand)
buying a 350 gm goodwrnech engine. carburated.
first question is.. if i stick with the tbi will the intake with the tbi on it fit on the 350 block?
next question is.. if i decide to go with the carburater which i don't really want to the only way i'll go to a carburater is if i have to... anyways i plan on eliminating the emissions and all the computer **** you don't need so will i need to get a carburated computer still?
now other then the computer i don't know what else you need to swap to carburated so let me know what else you need to switch to a carburated motor.
buying a 350 gm goodwrnech engine. carburated.
first question is.. if i stick with the tbi will the intake with the tbi on it fit on the 350 block?
next question is.. if i decide to go with the carburater which i don't really want to the only way i'll go to a carburater is if i have to... anyways i plan on eliminating the emissions and all the computer **** you don't need so will i need to get a carburated computer still?
now other then the computer i don't know what else you need to swap to carburated so let me know what else you need to switch to a carburated motor.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The Goodwrench 350 isn't carburated, but it is only emissions-legal for years when engines were carburated.
Your TBI intake won't fit directly on that engine, but by elongating the center two bolts on each side, you can bolt it down. Just for the record, it also has a two-piece rear main seal, so your flexplate won't fit it, either, and it doesn't come with one.
If you go carburated, it doesn't make a lot of sense to go computer-controlled. You'd have to find all the parts/harnesses/ECM from a donor car, or hope that someone who has converted to non-CC is giving you all you need and in good shape.
Non-CC aftermarket is fairly easy to accomplish. One wire to the vacuum/mechanical advance HEI distributor for power, one wire for the tach, power wire to electric choke. A little more complicated is rigging up torque converter lock-up capability, but there are kits available to accomplish that.
Your TBI intake won't fit directly on that engine, but by elongating the center two bolts on each side, you can bolt it down. Just for the record, it also has a two-piece rear main seal, so your flexplate won't fit it, either, and it doesn't come with one.
If you go carburated, it doesn't make a lot of sense to go computer-controlled. You'd have to find all the parts/harnesses/ECM from a donor car, or hope that someone who has converted to non-CC is giving you all you need and in good shape.
Non-CC aftermarket is fairly easy to accomplish. One wire to the vacuum/mechanical advance HEI distributor for power, one wire for the tach, power wire to electric choke. A little more complicated is rigging up torque converter lock-up capability, but there are kits available to accomplish that.
Thread Starter
Senior Member
Joined: Nov 2002
Posts: 638
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Car: 89 trans am
Engine: 355
Transmission: 700r4
man i hate engines. what do you mean by non cc?
ok.. so pretty much it would be easier to go carburated right?
i know my dad know how to eliminate all the computer stuff.. i'm a beginner at this stuff so just stick with my terms please lol.
so anyways once we were to eliminate all the computer stuff then that would be out of the way. my dad is very good with cars and he probably knows everything to do but i don't think he likes the idea of me doing alot of the stuff i do so if i like talk to him about it and pretend i know what i'm talking about he will do it... i already have distributors with the vacume advance because when we did my 84 trans am's 305 we eliminated the computer and put holly intake and carb on it and had to do something with the distributor.
edit: i was thinking about your post.. so pretty much i would need a distributor without all the wires.. and a carburator without all the wires? correct? plus eliminate the computer
also you seem pretty knowledgable in motors.. what if i were to just buy this crate motor and buy a carburator for it what all would i need to do to my car if i just bought this crate motor?
LINK:
http://www.jegs.com/cgi-bin/ncommerc...29&prmenbr=361
ok.. so pretty much it would be easier to go carburated right?
i know my dad know how to eliminate all the computer stuff.. i'm a beginner at this stuff so just stick with my terms please lol.
so anyways once we were to eliminate all the computer stuff then that would be out of the way. my dad is very good with cars and he probably knows everything to do but i don't think he likes the idea of me doing alot of the stuff i do so if i like talk to him about it and pretend i know what i'm talking about he will do it... i already have distributors with the vacume advance because when we did my 84 trans am's 305 we eliminated the computer and put holly intake and carb on it and had to do something with the distributor.
edit: i was thinking about your post.. so pretty much i would need a distributor without all the wires.. and a carburator without all the wires? correct? plus eliminate the computer
also you seem pretty knowledgable in motors.. what if i were to just buy this crate motor and buy a carburator for it what all would i need to do to my car if i just bought this crate motor?
LINK:
http://www.jegs.com/cgi-bin/ncommerc...29&prmenbr=361
Last edited by trans_am_ta_84; Dec 15, 2003 at 07:53 PM.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
That's a very good engine. A 650 or 750 Holley would work very well on it. It already has the distributor.
You'll need to rig up a way to lock up the torque converter. A higher stall torque converter would be a good idea to let this engine get up to its powerband right away. Should also have mentioned exhaust - replace it all, from engine to rear bumper with headers and high-flow stuff all the way back.
The engine won't "bolt right in", but there won't be anything insurmountable. The other problem you will have is the increase in power is going to require the proper supporting cast - suspension upgrades like sub-frame connectors, poly bushings instead of rubber, boxed control arms, etc.
By the way, "CC" means "computer controlled". So, non-CC means "not computer controlled".
You'll need to rig up a way to lock up the torque converter. A higher stall torque converter would be a good idea to let this engine get up to its powerband right away. Should also have mentioned exhaust - replace it all, from engine to rear bumper with headers and high-flow stuff all the way back.
The engine won't "bolt right in", but there won't be anything insurmountable. The other problem you will have is the increase in power is going to require the proper supporting cast - suspension upgrades like sub-frame connectors, poly bushings instead of rubber, boxed control arms, etc.
By the way, "CC" means "computer controlled". So, non-CC means "not computer controlled".
Thread Starter
Senior Member
Joined: Nov 2002
Posts: 638
Likes: 0
Car: 89 trans am
Engine: 355
Transmission: 700r4
hrm. alright i'm with you now. what kind of stall converter and specs should i get if i were to get that motor? what sort of stuff should i get to do the suspension upgrades? brand names and stuff.. best place to buy?
also i have a swet of headers, and i plan on getting ravin exhaust (i work at midas) and making my own 3 inch pipe.
edit: and by the way.. with that kind of power, and the stall converter, and 3.42's what kind of times do you think i'll be turning?
also i have a swet of headers, and i plan on getting ravin exhaust (i work at midas) and making my own 3 inch pipe.
edit: and by the way.. with that kind of power, and the stall converter, and 3.42's what kind of times do you think i'll be turning?
Last edited by trans_am_ta_84; Dec 16, 2003 at 02:02 PM.
Supreme Member
Joined: Dec 2003
Posts: 2,391
Likes: 1
From: Newark, DE
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
You could use a Goodwrench 350 and install the stock TBI unit on it. All you would need to make it work is a chip from a TBI 350 car. It should make it through emissions just fine. You will also need a 350 knock sensor, but that's about it. I did this swap in my '87 Blazer and it worked great. The TBI makes way better torque than a carb will anyway.
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