The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-31-2009, 10:56 PM   #1
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Question on LT1 motors?

I was just hoping to ask what is a LT1 motor?? I see they are thought after but why what is the difference from just a 350 4 bolt? I no on one of my post I said I have a 1993 Buick Road-master 5.7 motor and some one post back to bad it was not a 1994 Roadmaster cus they have a LT1 motor? Dose any one no if a 1995 Roadmaster wagon have the LT1??
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 01-01-2010, 08:10 AM   #2
63 & 64 Bowties
and a few others
 
Join Date: Jun 2007
Location: Blue Ridge Mountains of VA
Posts: 5,638
Re: Question on LT1 motors?

I'm probably not the right person to answer these questions. But, in the Caprice cop cars, 94 was the first year for LT1 (I've owned a 93 and a 94.) So, I'm assuming the Buicks were the same. 92 and older was a TPI. Someone correct me here if I'm wrong.
__________________
Bill US Army Vet -193rd Infantry
BlueRidgeMuscleCars.com

“The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi
63 & 64 Bowties is offline   Reply With Quote
Old 01-01-2010, 02:12 PM   #3
Atomsplitter
Registered User
 
Atomsplitter's Avatar
 
Join Date: Mar 2006
Location: Ontario
Posts: 514
Re: Question on LT1 motors?

The 1995 Roadmaster has the same engine that I'm using but mine is out of a 1995 Impala SS and yes they are LT1's. I have a picture of mine in my album.

Last edited by Atomsplitter; 01-01-2010 at 02:15 PM.
Atomsplitter is offline   Reply With Quote
Old 01-05-2010, 03:50 AM   #4
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Quote:
Originally Posted by 63 & 64 Bowties View Post
I'm probably not the right person to answer these questions. But, in the Caprice cop cars, 94 was the first year for LT1 (I've owned a 93 and a 94.) So, I'm assuming the Buicks were the same. 92 and older was a TPI. Someone correct me here if I'm wrong.
thanks for the info guys....... today I was told that my 93 buick roadmaster limited has the LT1 motor?? dose any one no for sure??? how can i fine out......
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 01-05-2010, 08:13 AM   #5
63 & 64 Bowties
and a few others
 
Join Date: Jun 2007
Location: Blue Ridge Mountains of VA
Posts: 5,638
Re: Question on LT1 motors?

Quote:
Originally Posted by 56ClassicTruck View Post
thanks for the info guys....... today I was told that my 93 buick roadmaster limited has the LT1 motor?? dose any one no for sure??? how can i fine out......
Look under the air cleaner. If you see what looks like an intake manifold and sorta looks like a carb, you have a Throttle body 350 which is still an excellent donor for your truck.
__________________
Bill US Army Vet -193rd Infantry
BlueRidgeMuscleCars.com

“The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi
63 & 64 Bowties is offline   Reply With Quote
Old 01-01-2010, 05:48 PM   #6
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 929
Re: Question on LT1 motors?

Quote:
Originally Posted by 56ClassicTruck View Post
I was just hoping to ask what is a LT1 motor?? I see they are thought after but why what is the difference from just a 350 4 bolt? I no on one of my post I said I have a 1993 Buick Road-master 5.7 motor and some one post back to bad it was not a 1994 Roadmaster cus they have a LT1 motor? Dose any one no if a 1995 Roadmaster wagon have the LT1??
i have a 97 vette motor in my 38 coupe and i really like it. if i had it to do over again i probably would have went with a vortech motor 5.3 or a 6.0 out of a late model chevy/gmc pickup. much more reliable and cheap hp.

when you ask whats the difference between a carbed 350 and an lt1 i assume you mean besides the obvious? such as fuel delivery for instance. not to mention the distributer located below the water pump. if you do decide to go the lt1 route make sure to get a later model motor, it will have the upgraded opti spark (vent hole) which will help in the notorious distributer failure
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 01-05-2010, 09:06 AM   #7
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 929
Re: Question on LT1 motors?

If you have a distributer in the back you don't have a LT1. If the spark plug wires go under the water pump, then you do have one.
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 01-05-2010, 11:13 AM   #8
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 929
Re: Question on LT1 motors?



here ya go, this is what an lt1 looks like. of course mine has the top and rail covers and dirty valve covers. but you get the idea
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 01-05-2010, 02:37 PM   #9
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Cool thanks guys!!!!! Man I love this site!!!! well got to go out and look...
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 03-24-2010, 03:26 AM   #10
Jonboy
Slots go on anything!
 
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
Re: Question on LT1 motors?

Quote:
Originally Posted by blackdiesel View Post


here ya go, this is what an lt1 looks like. of course mine has the top and rail covers and dirty valve covers. but you get the idea
Hey blackdiesel, what accessory setup is that? I have a similar one that came on my truck, and the idler pulleys squeak like crazy. Wondering where to source replacements from.

Another pecularity on these engines is that they seem prone to eat EGR valves. I have had to replace them on all of my B-bodies. I think it will just go away on my truck, though.
__________________
1974 Jimmy- 5.3/4L80e/NP241
Jonboy is offline   Reply With Quote
Old 01-05-2010, 06:51 PM   #11
Jonboy
Slots go on anything!
 
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
Re: Question on LT1 motors?

Another easy way to tell is that on the B body (Roadmaster, Caprice/Impala SS, Fleetwood) cars, the LT1 cars have dual exhaust. There is a 4.3 V8 (L99 I think) that looks identical, but is pretty much useless for performance. The B body LT1's are similar to the F (Camaro/Firebird) and Y (Corvette) engines, with the exception of the heads. B car engines are rated at 260 HP, and have iron heads. The F car engine is rated at 275 HP, and the Y car is 300. The only differences in the F & Y engines are the intake and exhaust packaging (and accessory drives), with the F car being a lot tighter to fit in the space.
__________________
1974 Jimmy- 5.3/4L80e/NP241
Jonboy is offline   Reply With Quote
Old 01-05-2010, 07:07 PM   #12
Atomsplitter
Registered User
 
Atomsplitter's Avatar
 
Join Date: Mar 2006
Location: Ontario
Posts: 514
Re: Question on LT1 motors?

Here's a bit of information on the changes in the 5.7 from 1993 to 1994.
--------------------------------------------------------------------
Year-to-year changes
1992: A 4-door sedan joined the Roadmaster wagon as an early 1992 model, carrying the 5.7 L TBI (Throttle-Body Injection) V8 engine that developed 180 hp. That engine also went into the Estate Wagon, replacing the 5.0 L.
1993: Window lockout feature and the addition of a new spoke wheel cover mid-year.
1994: A redesigned dashboard included a new instrument cluster, with climate controls mounted higher and a knee bolster below. Dual airbags were also installed. The 5.7L TBI is replaced with a detuned 5.7L LT1 engine from the Chevrolet Corvette. This LT1 had cast iron cylinder heads and produced 260 hp (194 kW) (40 less horsepower than the Corvette). A new electronically-controlled 4L60-E 4-speed automatic transmission replaces the 4L60.

---------------------------

Last edited by Atomsplitter; 01-05-2010 at 07:08 PM.
Atomsplitter is offline   Reply With Quote
Old 02-23-2010, 03:49 AM   #13
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Quote:
Originally Posted by Atomsplitter View Post
Here's a bit of information on the changes in the 5.7 from 1993 to 1994.
--------------------------------------------------------------------
Year-to-year changes
1992: A 4-door sedan joined the Roadmaster wagon as an early 1992 model, carrying the 5.7 L TBI (Throttle-Body Injection) V8 engine that developed 180 hp. That engine also went into the Estate Wagon, replacing the 5.0 L.
1993: Window lockout feature and the addition of a new spoke wheel cover mid-year.
1994: A redesigned dashboard included a new instrument cluster, with climate controls mounted higher and a knee bolster below. Dual airbags were also installed. The 5.7L TBI is replaced with a detuned 5.7L LT1 engine from the Chevrolet Corvette. This LT1 had cast iron cylinder heads and produced 260 hp (194 kW) (40 less horsepower than the Corvette). A new electronically-controlled 4L60-E 4-speed automatic transmission replaces the 4L60.

---------------------------
do you have any info on 1995 buick roadmaster vin 1G4BN52P8SR415952?
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 02-23-2010, 06:46 PM   #14
cajundragger
Registered User
 
Join Date: Aug 2006
Location: louisiana
Posts: 1,008
Re: Question on LT1 motors?

as per wikipedia..

"General Motors' Generation II LT is a small block V8 engine. Making its debut in the 1992 Chevrolet Corvette, the new LT sought to draw upon the heritage of the ultimate small-block, the 1970 Chevrolet LT-1.
A significant improvement over the original Generation I V8 is the Generation II LT's "reverse cooling" system, allowing coolant to start at the heads and flow down through the block. This keeps the heads cooler, affording greater power through a higher compression ratio and greater spark advance at the same time it maintains higher and more consistent cylinder temperatures.
Some parts from the Generation II are interchangeable with the old Generation I engine. The interchangeable parts include the rotating assembly (crank shaft, pistons, and connecting rods) of the Generation I small block with the one-piece rear main seal. The LT uses a new engine block, cylinder head, timing cover, water pump, intake manifold, accessory brackets, and front-mounted "Optispark" distributor. Engine mounts and bell housing bolt pattern remain the same, permitting a newer engine to be readily swapped into an older vehicle."

"In 1992, GM created a new-generation small-block engine called the LT1, similar to the high-output Generation I LT-1 of the 1970s. It displaced 5.7 L (350 cu in) and was a 2-valve pushrod design. The LT1 used a reverse-flow cooling system which cooled the cylinder heads first, maintaining lower cylinder temperatures and allowing the engine to run at a higher compression than its immediate predecessors.
This engine was used in:
Y-body:
1992-1996 Chevrolet Corvette C4
F-body:
1993-1997 Chevrolet Camaro Z28 and SS
1993-1997 Pontiac Firebird Formula and Trans Am
B-body:
1994-1996 Buick Roadmaster
1994-1996 Chevrolet Caprice
1994-1996 Chevrolet Caprice Police Package
1994-1996 Chevrolet Impala SS
1994-1996 Chevrolet Caprice Wagon
1994-1996 Buick Roadmaster Wagon
D-body:
1994-1996 Cadillac Fleetwood
"
cajundragger is offline   Reply With Quote
Old 02-24-2010, 02:02 AM   #15
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Quote:
Originally Posted by cajundragger View Post
as per wikipedia..

"General Motors' Generation II LT is a small block V8 engine. Making its debut in the 1992 Chevrolet Corvette, the new LT sought to draw upon the heritage of the ultimate small-block, the 1970 Chevrolet LT-1.
A significant improvement over the original Generation I V8 is the Generation II LT's "reverse cooling" system, allowing coolant to start at the heads and flow down through the block. This keeps the heads cooler, affording greater power through a higher compression ratio and greater spark advance at the same time it maintains higher and more consistent cylinder temperatures.
Some parts from the Generation II are interchangeable with the old Generation I engine. The interchangeable parts include the rotating assembly (crank shaft, pistons, and connecting rods) of the Generation I small block with the one-piece rear main seal. The LT uses a new engine block, cylinder head, timing cover, water pump, intake manifold, accessory brackets, and front-mounted "Optispark" distributor. Engine mounts and bell housing bolt pattern remain the same, permitting a newer engine to be readily swapped into an older vehicle."

"In 1992, GM created a new-generation small-block engine called the LT1, similar to the high-output Generation I LT-1 of the 1970s. It displaced 5.7 L (350 cu in) and was a 2-valve pushrod design. The LT1 used a reverse-flow cooling system which cooled the cylinder heads first, maintaining lower cylinder temperatures and allowing the engine to run at a higher compression than its immediate predecessors.
This engine was used in:
Y-body:
1992-1996 Chevrolet Corvette C4
F-body:
1993-1997 Chevrolet Camaro Z28 and SS
1993-1997 Pontiac Firebird Formula and Trans Am
B-body:
1994-1996 Buick Roadmaster
1994-1996 Chevrolet Caprice
1994-1996 Chevrolet Caprice Police Package
1994-1996 Chevrolet Impala SS
1994-1996 Chevrolet Caprice Wagon
1994-1996 Buick Roadmaster Wagon
D-body:
1994-1996 Cadillac Fleetwood
"

WOW!!!! Thank you grate info!!!!!
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 03-17-2010, 01:50 AM   #16
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Well I just bout a 1994 Buick Roadmaster limited today as a donor for my 56 truck project for $750 and it runs grate...... hoping to use complete LT1 drive train posi rear and wire harness and AC, seats..
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 03-17-2010, 09:19 AM   #17
1952ssr
Registered User
 
1952ssr's Avatar
 
Join Date: Nov 2009
Location: Gainesville Georgia
Posts: 458
Re: Question on LT1 motors?

Quote:
Originally Posted by 56ClassicTruck View Post
Well I just bout a 1994 Buick Roadmaster limited today as a donor for my 56 truck project for $750 and it runs grate...... hoping to use complete LT1 drive train posi rear and wire harness and AC, seats..
Sounds like a good plan, my '52 has a LT1 / 4L60 & fuel tank from a '94 Z28, Cadillac fuel lines, and a roadmaster drive shaft.
1952ssr is offline   Reply With Quote
Old 03-19-2010, 01:00 PM   #18
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Quote:
Originally Posted by 1952ssr View Post
Sounds like a good plan, my '52 has a LT1 / 4L60 & fuel tank from a '94 Z28, Cadillac fuel lines, and a roadmaster drive shaft.
hey 1952ssr, would like to see some of your work on that.
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 03-17-2010, 02:10 AM   #19
63chevyll
gets board easy.......
 
63chevyll's Avatar
 
Join Date: Mar 2009
Location: Colorado Springs
Posts: 717
Re: Question on LT1 motors?

do you have a picture?
63chevyll is offline   Reply With Quote
Old 05-14-2010, 11:44 PM   #20
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

Quote:
Originally Posted by 63chevyll View Post
do you have a picture?
sorry I toke so long.
Attached Images
     
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 05-14-2010, 11:50 PM   #21
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

more
Attached Images
     
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 05-14-2010, 11:56 PM   #22
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

more
Attached Images
   
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Old 03-24-2010, 08:23 AM   #23
blackdiesel
Registered User
 
blackdiesel's Avatar
 
Join Date: Jan 2009
Location: Omaha, Arkansas
Posts: 929
Re: Question on LT1 motors?

Alan groves is the brackit maker that I used. and no EGR valve being used here.
__________________
'57 Chevy Pickup
'56 GMC LCF Cummins
'38 Chrysler Royal
'57 2wd change
http://67-72chevytrucks.com/vboard/s...light=speedway
blackdiesel is offline   Reply With Quote
Old 05-14-2010, 04:15 PM   #24
1952ssr
Registered User
 
1952ssr's Avatar
 
Join Date: Nov 2009
Location: Gainesville Georgia
Posts: 458
Re: Question on LT1 motors?

Here's some pictures for 56CT. I don't have any new ones with my headers on.
Attached Images
  
1952ssr is offline   Reply With Quote
Old 05-15-2010, 11:29 AM   #25
56ClassicTruck
Registered User
 
Join Date: Oct 2008
Location: SW,WA
Posts: 202
Re: Question on LT1 motors?

hey thanks 1952ssr are getting rid of the smog stuff, will you be using the AC, from it?Like to see what type off heads you will be using. What are all your plans for it?
__________________
1996 Dodge 3500 4x4
1977 F250 Camper specal 4x4
1956 Chevy 3100 truck
56ClassicTruck is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:06 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com