305 to 350 or LS?
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From: Location, Location!
Car: 92 T/A 'vert
Engine: Mild .040 over L98 4 bolt mains
Transmission: Mostly stock 700R4, 2600 Vigilante
Axle/Gears: LS1 3.42
Re: 305 to 350 or LS?
350 is quick/easy/cheap. LS takes time/money/effort but yields outstanding power.
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From: williamstown,NJ
Car: 95 9C1,99 Sierra,90Sierra,00 sierra
Engine: TBI350,LM7,LT1,Vortec 350
Transmission: 700r4,4L60e,4L60e,4L80e
Axle/Gears: 10 bolt,14bolt,3:42,3:73,3:08,3:73.
Re: 305 to 350 or LS?
If this is a "project car" i would jump for the LS.
Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 305 to 350 or LS?
Originally Posted by jesse21
I got a 84 T/A 5.0..with a stock 305... Debating if I should swap a 350 or a LS engine???...
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: 305 to 350 or LS?
how much money do you have? how comfortable are you with wiring? LS swaps are hard to beat, but they do come at a cost
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Joined: Oct 2011
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From: San Fernando Valley,Los Angeles,CA
Car: 1984 Trans am
Engine: 305, V8, 5.0L
Re: 305 to 350 or LS?
O I see thanks for the advice but knowing 350 I would have to stay with carb engine and that's were I'm debating carb or fuelinject...
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From: San Fernando Valley,Los Angeles,CA
Car: 1984 Trans am
Engine: 305, V8, 5.0L
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From: San Fernando Valley,Los Angeles,CA
Car: 1984 Trans am
Engine: 305, V8, 5.0L
Joined: Mar 2000
Posts: 43,187
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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
"Los Angeles, CA". The only legal carb is the type your car came with.
$600 isn't much for an engine, unless you're willing to live with what you find used.
There is a tech article linked from the thirdgen.org homepage about swapping from auto to manual trans.
$600 isn't much for an engine, unless you're willing to live with what you find used.
There is a tech article linked from the thirdgen.org homepage about swapping from auto to manual trans.
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From: Ahead of you...
Car: 1984 LG4 Camaro
Engine: 350 Roller Motor
Transmission: Level 10 700R4
Axle/Gears: Strange 12 bolt 3.42
Re: 305 to 350 or LS?
A 350 will drop into the same spot as a 305 as they are the same block and use the same accessories and everything else. But a 350 will need more fuel, adjustments to carb & timing, and some other stuff to work 100%. A carbed 350 with some minor performance parts is going to be in the 275 to 300hp range.
An LS1/2/3 is going to be about 150lbs lighter, give you over 300hp in stock form (with proper tuning & a free flowing exhaust) and is a major upgrade - not talking cutting and welding, but a lot of things have to be changed.
An LS1/2/3 is going to be about 150lbs lighter, give you over 300hp in stock form (with proper tuning & a free flowing exhaust) and is a major upgrade - not talking cutting and welding, but a lot of things have to be changed.
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: 305 to 350 or LS?
good catch. being a Cali car, any engine swap is going to be more costly than most of us have to endure. if you decide to go LS1/2/3, you're going to need to get *all* of the emissions parts off the donor car
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From: Commerce Twp, MI
Car: '91 Camaro
Engine: LSx
Transmission: 4l60e
Axle/Gears: posi
Joined: Mar 2000
Posts: 43,187
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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
There's no such thing as an "emission-free state". There are states that don't do inspection/testing, but the emissions laws apply to all 50 of the United States.
Except California is allowed to have more stringent requirements than what the Feds impose.
Except California is allowed to have more stringent requirements than what the Feds impose.
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From: SoCal
Car: 91 Z28 Convertible, 2000 trans am
Engine: ls6, ls1
Transmission: 4l60e
Re: 305 to 350 or LS?
Keep the 305. As I said in another thread, it was recently rebuilt and as was the 700r4. Swaps don't come cheap and unless that 305 was shot, I wouldn't recommend a transplant. You have a nice car in great shape considering its age. Keep it that way. Wish I could have kept it.
Re: 305 to 350 or LS?
Joined: Sep 2005
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 305 to 350 or LS?
I lived in TN for MANY years. Probably more than you've been alive.
Yeah, there's some SERIOUS violators there.
Butt in the end, The Law Is The Law. OTOH enforcement (utterly nonexistent at the state level) is about 99% of it. So sure, in some places you can do whatever the hell you want and have pretty damn good odds of not getting caught; doesn't mean the laws don't "apply" or aren't there.
Great way to revive a thread that's been dead for almost 13 years.
Yeah, there's some SERIOUS violators there.
Butt in the end, The Law Is The Law. OTOH enforcement (utterly nonexistent at the state level) is about 99% of it. So sure, in some places you can do whatever the hell you want and have pretty damn good odds of not getting caught; doesn't mean the laws don't "apply" or aren't there.
Great way to revive a thread that's been dead for almost 13 years.
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From: Franklin, KY near Beech Bend Raceway, Corvette Plant and Museum.
Car: 1992 Pontiac Firebird
Engine: 5.0L L03 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: 305 to 350 or LS?
It absolutely is true.
1965 and down pre California emissions cars and 1967 and down pre Federal emissions cars you can run coal dust injection right on top of your dual quad tunnel ram with 1200 CFM Holley Dominators and ain't shat they can do about it emissions law wise. They might site you for obstruction of vision or too loud of a noise on a drive-by noise test with both 4 barrels WTFO.
1966 and up California emissions cars and 1968 and up Federal emissions cars they can fine you and put you in prison for as little as swapping to an open element breather on you valve cover.
It's called The Federal Clean Air Act and California had their version of it 2 years before the rest of the country did.
If you live in The United States of America then you are subject to Federal & State emissions laws.
Thanks for bringing a 13 year old thread back to life to tell us how wrong we all are.
1965 and down pre California emissions cars and 1967 and down pre Federal emissions cars you can run coal dust injection right on top of your dual quad tunnel ram with 1200 CFM Holley Dominators and ain't shat they can do about it emissions law wise. They might site you for obstruction of vision or too loud of a noise on a drive-by noise test with both 4 barrels WTFO.
1966 and up California emissions cars and 1968 and up Federal emissions cars they can fine you and put you in prison for as little as swapping to an open element breather on you valve cover.
It's called The Federal Clean Air Act and California had their version of it 2 years before the rest of the country did.
If you live in The United States of America then you are subject to Federal & State emissions laws.
Thanks for bringing a 13 year old thread back to life to tell us how wrong we all are.
Last edited by Airwolfe; Oct 12, 2024 at 08:20 PM.
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