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Post Info TOPIC: Researching the LO5 - 5.7 TBI
73SC


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Researching the LO5 - 5.7 TBI
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My latest engine acquisition is a 1993 LO5 so I have been searching the web taking in information like a sponge. Here's some of what I found.

LO5 is the second to last iteration of the 1955 small block. In 1994 the LT 1 was introduced in the B body (corrected by Astro Jet below) and although somewhat similar it can not be directly traced to the legendary 1955 small block.

LM1 5.7 4bbl were superseded with the LO5 powerplant after 1988.

1995 was the LO5 last year of designation switching in 1996 to L31 with addition of Vortec heads and intake making 255 HP and 365 lb-ft. then used exclusively in Trucks. (My GMC has this stump puller)

LO5 has 4 bolt mainbearing caps but uses centre bolt valve covers.

LO5 in stock form made from 180 to 210 HP and 290 to 310 lb-ft.

9C1 Police versions used free flowing Cats and roller lifters (correction from C1 below) plus L98 camshaft. GM conservatively rated this as 205 HP and 300 lb-ft.

Truck L05's were rated at 210 HP and 310 lb-ft and have a distinguished service record, dating their lineage to the original Chevy small-block V8 of 1955.




-- Edited by 73SC at 14:27, 2008-10-01

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
4SPEED427


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I think you likely mean roller lifters. The L05 cars had roller lifters, the L05 pickups had regular lifters. Go figure....

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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73SC


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Yes, as usual, the "parts counter" guy knows. wink

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
4SPEED427


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rofl.gif

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Astro Jet


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73SC wrote:

 In 1996 the LT 1 was introduced


small correction Ray, LT 1 was introduced in the 92 Corvette and the following year in the all new 4th gen F body.  It was basis for the new Impala SS in 94 - suprised that Carl 1 did not jump all over you regarding that point! biggrin




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Hillar

1970 LS4 (eventually an LS5) Laurentian 2dr hdtp
-and a bunch of other muscle cars...
73SC


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Astro Jet wrote:

73SC wrote:

 In 1996 the LT 1 was introduced


small correction Ray, LT 1 was introduced in the 92 Corvette and the following year in the all new 4th gen F body.  It was basis for the new Impala SS in 94 - suprised that Carl 1 did not jump all over you regarding that point! biggrin






Yes I was researching B bodies but that would be 94 wouldn't it. Can't rely on anything on the web anymore!

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
73SC


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Carl Stevenson wrote:

rofl.gif


Did it snow in Winnipeg ?



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
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4SPEED427


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Yup, took that pic this morning!

Actually, on a different thread someone mentioned hating snow pics.

You should never egg me on................

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
73SC


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Carl Stevenson wrote:

Yup, took that pic this morning!

Actually, on a different thread someone mentioned hating snow pics.

You should never egg me on................


Looks nice, looking forward to scenes like that.



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
Stephenzone


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Astro Jet wrote:

 

73SC wrote:

 In 1996 the LT 1 was introduced


small correction Ray, LT 1 was introduced in the 92 Corvette and the following year in the all new 4th gen F body.  It was basis for the new Impala SS in 94 - suprised that Carl 1 did not jump all over you regarding that point! biggrin


 


so whats the scoop on my 70 LT1 and i think grasshoppa is a little frosty this morning

 



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sTevE

55 GMC, 70 Pontiac 2+2 rag
Astro Jet


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Stephenzone wrote:

Astro Jet wrote:


73SC wrote:

 In 1996 the LT 1 was introduced


small correction Ray, LT 1 was introduced in the 92 Corvette and the following year in the all new 4th gen F body.  It was basis for the new Impala SS in 94 - suprised that Carl 1 did not jump all over you regarding that point! biggrin




so whats the scoop on my 70 LT1 and i think grasshoppa is a little frosty this morning


That's an LT-1 as opposed to LT 1.  That little dash makes all the difference!



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Hillar

1970 LS4 (eventually an LS5) Laurentian 2dr hdtp
-and a bunch of other muscle cars...
Stephenzone


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thanxs never knew that, just thought gm was trying to piss me off. its always been a bone of contention with me.

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sTevE

55 GMC, 70 Pontiac 2+2 rag
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4SPEED427


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Stephenzone wrote:

thanxs never knew that, just thought gm was trying to piss me off. its always been a bone of contention with me.


Don't let that bug you. Think how the 66 Impala 427/425hp guys feel sharing the L72 code with the 1.3 liter Geo Metro boys......

 



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
73SC


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RPO Decoder for late models

Try that decoder, I put in L88, L34, L48...thet're all 4 cylinders!!!

And that '70 LT1 is an original small block design while the LT-1 is a new design, being a reverse flow engine which allows coolant to cool heads first allowing for higher compression ratios and more HP..

-- Edited by 73SC at 16:25, 2008-10-01

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
65Camino


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I know it would go nicely into a certain 65 El Camino.

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Astro Jet


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73SC wrote:


And that '70 LT1 is an original small block design while the LT-1 is a new design, being a reverse flow engine which allows coolant to cool heads first allowing for higher compression ratios and more HP..

-- Edited by 73SC at 16:25, 2008-10-01


You've got it mixed up Ray, the LT-1 is the 1970 traditional small block design while the LT1 is the 1992 and up engine.  That new Caddy is making you so giddy you can't type straight any more.  Have you picked it up yet, or should I just look for various fresh burn-out marks throughout the streets of East York as evidence?


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Hillar

1970 LS4 (eventually an LS5) Laurentian 2dr hdtp
-and a bunch of other muscle cars...
73SC


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Astro Jet wrote:
You've got it mixed up Ray, the LT-1 is the 1970 traditional small block design while the LT1 is the 1992 and up engine.  That new Caddy is making you so giddy you can't type straight any more.  Have you picked it up yet, or should I just look for various fresh burn-out marks throughout the streets of East York as evidence?

Thank goodness I have you to help me out Hillar. As far as the Fleetwood goes they delivered it and it's at JB's until I sort out the retirement of the Buick. Now I have another problem, Mary wants it! She learned to drive on her Dad's big boats the last one was a 78 Park Avenue so she is quite at home tossing around 5,000 lbs. of Detroit iron. nod.gif



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Stephenzone


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65Camino wrote:


I know it would go nicely into a certain 65 El Camino.


sorry the LT-1 is in my 78 cj7 jeep




 



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sTevE

55 GMC, 70 Pontiac 2+2 rag
eeluddy


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Years ago I had a 71 Corvette with the LT-1 350. I'll never forget the sound of that engine. The forged pistons always had a distintive voice until it warmed up, along with the lifters it sounded like it was always out of oil. Another guy I knew then had a 72 LT-1 but it never had the same harmony.

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