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Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

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Old 01-20-2008, 08:01 PM   #1
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Join Date: Dec 2007
Location: sedro-woolley,wa...near seattle
Posts: 16
Car: 91 camaro RS
Engine: 305 TBI
Transmission: auto
Axle/Gears: 89 2.77 BW 9-bolt disc possi

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is a 1990 350 LO5 a good place to start?

hello...i have a 91 RS 305 auto...77k like new/ runs great....i was wanting to find a motor to slowley rebuild on the engine stand for more power...i see on craigs i can buy a 90 350 4 bolt main LO5 engine for 300 obo...15k since rebuild....i have read on here you can inlarge the roller cam,biger injectors/or just raise the preshure,tuning and headers and intake and k&n...and you have a nice engine....sooo would this 350 be a good start?
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Old 01-20-2008, 09:56 PM   #2
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Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 41,988
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 10B-3.73/9"-3.89

Classifieds Rating: (14)

Passenger car LO5's had roller lifters, truck LO5's did not. The majority of LO5's were put in trucks, and the majority of them were not machined for roller lifters. So, that's a crapshoot there.

LO5 heads aren't anything to write home about, but they aren't totally worthless in a mild build.

What to do with LO3 TBI for a 350 is covered in the TBI forum.

K&N is a "must-don't" in my book.
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Old 01-20-2008, 10:02 PM   #3
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Join Date: Dec 2007
Location: sedro-woolley,wa...near seattle
Posts: 16
Car: 91 camaro RS
Engine: 305 TBI
Transmission: auto
Axle/Gears: 89 2.77 BW 9-bolt disc possi

Classifieds Rating: (0)
Re: is a 1990 350 LO5 a good place to start?

the motor is out of a caddi Brouhme...i'll ask if it has rollor Rockers...it does have a rollor cam...i asked
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Old 01-20-2008, 11:33 PM   #4
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Join Date: Jan 2005
Location: Hurst, Texas
Posts: 6,601
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears

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Re: is a 1990 350 LO5 a good place to start?

Quote:
Originally Posted by RlphKnndy496 View Post
the motor is out of a caddi Brouhme...i'll ask if it has rollor Rockers...it does have a rollor cam...i asked
If its the stock caddy engine it will have roller lifters and the 305 peanut roller cam for a grand total of 185 HP/300TQ. Good thing is, it will most likely have flat-top pistons for a 9.6:1 compression ratio with 65cc chambers.
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Old 01-20-2008, 11:45 PM   #5
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Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 41,988
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 10B-3.73/9"-3.89

Classifieds Rating: (14)

It certainly wouldn't have roller rockers from the factory. Roller lifters is as far as they went.
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Old 01-20-2008, 11:57 PM   #6
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Join Date: Jan 2005
Location: Hurst, Texas
Posts: 6,601
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears

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Re: is a 1990 350 LO5 a good place to start?

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Originally Posted by five7kid View Post
It certainly wouldn't have roller rockers from the factory. Roller lifters is as far as they went.
Until the late model 4.3 Vortec
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Old 01-21-2008, 12:07 AM   #7
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Join Date: Mar 2000
Location: Littleton, CO USA
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 10B-3.73/9"-3.89

Classifieds Rating: (14)

Which isn't an LO5.
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Old 01-21-2008, 12:07 AM
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