late model small blocks like LT1's or LS1's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69C-owner · 09-18-2011, 03:07 PM

Anyone runnin this type of engine swap?
Posted via Mobile Device

EA69TRK · 09-18-2011, 04:56 PM

There are a few members who are running them if you go to the engine and drivetrain forum they have a whole sub forum for LSx swaps here's a link to the LS swap thread http://67-72chevytrucks.com/vboard/s...d.php?t=412159

hugger6933 · 09-18-2011, 06:52 PM

ls1.com has thousands of swaps unbeliveable amount of information there. I personally have done two swaps, A6.0 4l80e into my 68 lemans convert and a 5.3 4l60e into a 89 c-1500 silverado.

67C10BUB · 09-18-2011, 10:50 PM

Quote:

Originally Posted by 69C-owner

Anyone runnin this type of engine swap?
Posted via Mobile Device

I am.

Shon · 09-19-2011, 08:31 AM

all day every day

**Clyde65** · 09-19-2011, 09:50 AM

I am! 4.8/4l60e, 65 chevy SWB

usmcchevy · 09-19-2011, 01:41 PM

Lots of us here

Click here: http://67-72chevytrucks.com/vboard/s...d.php?t=457939

BR3W CITY · 09-19-2011, 02:53 PM

6.0 swapped here, and for reference I'm pretty sure its unfair to call an LT1 late model...that thing was ancient as soon as it started

Shon · 09-19-2011, 02:55 PM

Quote:

Originally Posted by BR3W CITY

6.0 swapped here, and for reference I'm pretty sure its unfair to call an LT1 late model...that thing was ancient as soon as it started

Get out o here!!
We have some healthy LT1s roaming around in the Upstate of SC...
one stock bottom end (132k) with H/C going 9s (1/4) with issues.
Several others getting it done too!!
Looking at getting one for my 88 LX Coupe so I can go to the LTx shootout!

BR3W CITY · 09-19-2011, 09:48 PM

running an LT1 is the mechanical equivalent to being lefthanded

68GMCCustom · 09-21-2011, 09:15 PM

the genII sbc LT1/LT4 swaps were hot several years ago. No days you're passing on power you could have by selecting one.

The gen III/IV sbc motors are the way to go. From 4.8L on up to 7.0L.... and more with the aftermarket LSX blocks.

BR3W CITY · 09-22-2011, 12:14 PM

Quote:

Originally Posted by 68GMCCustom

the genII sbc LT1/LT4 swaps were hot several years ago. No days you're passing on power you could have by selecting one.

The gen III/IV sbc motors are the way to go. From 4.8L on up to 7.0L.... and more with the aftermarket LSX blocks.

Doesn't the 8.1 still count as an lsx, or are we counting that as a Gen III/IV big block?

68GMCCustom · 09-22-2011, 09:49 PM

the 8.1 is a whole 'nother animal...and yes it would be considered a big block.

BR3W CITY · 09-23-2011, 03:55 PM

i know its a different block and motor altogether, but i guess it tends to get lumped into the same category on forums...

68GMCCustom · 09-23-2011, 09:37 PM

I think its more "vortec" then lsx.

clinebarger · 09-23-2011, 11:40 PM

Quote:

Originally Posted by BR3W CITY

6.0 swapped here, and for reference I'm pretty sure its unfair to call an LT1 late model...that thing was ancient as soon as it started

Whats so ancient about them??

69C-owner · 09-24-2011, 11:10 PM

Yay my thread got popular lol and Shon I like your style, I've always wanted to put a SBC in one of those fox bodies, right now I have a LT1 and a 4L60E i pulled out of a 95 Buick Roadmaster stationwagon, getting a 6speed from a trans am and rebuilding that LT1 then dropping both in my truck has crossed my mind a few times, i could get decent power out of the Pontiac 350 but id love getting good mpg's so I wont feel so bad at the gas station
Posted via Mobile Device

Ackattack · 09-27-2011, 12:56 PM

I think the achilies heal of the LT1 is the optispark. To me it just made it relatively unreliable.

BR3W CITY · 09-27-2011, 02:01 PM

Quote:

Originally Posted by clinebarger

Whats so ancient about them??

The biggest advance they had was reverse flow cooling...which wasn't even GM's design. Evans designed the system and GM put it into the LT1, then proceeded to get sued for it.
Then, as mentioned, the opti-spark...which was poorly designed from the get go. On top of that, guys have been converting SBC heads (MUCH OLDER tech) to work with the reverse flow cooling on the LT1, because they flowed better AND because so few people ever made heads for it. The tech was dead before it started,

clinebarger · 09-27-2011, 04:45 PM

Quote:

Originally Posted by BR3W CITY

The biggest advance they had was reverse flow cooling...which wasn't even GM's design. Evans designed the system and GM put it into the LT1, then proceeded to get sued for it.
Then, as mentioned, the opti-spark...which was poorly designed from the get go. On top of that, guys have been converting SBC heads (MUCH OLDER tech) to work with the reverse flow cooling on the LT1, because they flowed better AND because so few people ever made heads for it. The tech was dead before it started,

Ive owned several LT1s never had many Optispark problems...They last atleast 100K.
Iron LT1 & Iron Vortec heads share the same port design & flow VERY well. Then you got the LT4 head. I see no reason to adapt gen 1 heads to a LT1.

BR3W CITY · 09-28-2011, 10:52 PM

having not done the conversion myself I guess I can't really say firsthand, but there are countless threads on the subject. Same goes for machining SBC manifolds to fit the lt platform.

Ends up being kind of the stepchild motor. Its not the pioneer like the sbc, but it never got all the way to "modern fuel injected", quite like the ls series. I mean there are some cool TPI manifolds, and it was cool to get fuel injection before things like the Holley and Edel-broke stand alone systems came out in force.

09-18-2011, 03:07 PM	#1
69C-owner Registered User Join Date: Dec 2010 Location: Apison Tn Posts: 490	late model small blocks like LT1's or LS1's Anyone runnin this type of engine swap? Posted via Mobile Device __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=43855069 LWB Fleet 1994 Buick Roadmaster 1994 GMC Sonoma

09-18-2011, 04:56 PM	#2
EA69TRK Registered User Join Date: Jan 2009 Location: Sacramento,California Posts: 323	Re: late model small blocks like LT1's or LS1's There are a few members who are running them if you go to the engine and drivetrain forum they have a whole sub forum for LSx swaps here's a link to the LS swap thread http://67-72chevytrucks.com/vboard/s...d.php?t=412159 __________________ 1969 Chevy C10 Short Step -Project 2005 GMC Sierra Crew Cab 1500 -DD 2017 Laguna Orange Roadglide - Good Weather DD

09-18-2011, 06:52 PM	#3
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Re: late model small blocks like LT1's or LS1's ls1.com has thousands of swaps unbeliveable amount of information there. I personally have done two swaps, A6.0 4l80e into my 68 lemans convert and a 5.3 4l60e into a 89 c-1500 silverado.

09-19-2011, 08:31 AM	#5
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: late model small blocks like LT1's or LS1's all day every day __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

09-19-2011, 09:50 AM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: late model small blocks like LT1's or LS1's I am! 4.8/4l60e, 65 chevy SWB __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

09-19-2011, 01:41 PM	#7
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: late model small blocks like LT1's or LS1's Lots of us here Click here: http://67-72chevytrucks.com/vboard/s...d.php?t=457939 __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

09-19-2011, 02:53 PM	#8
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: late model small blocks like LT1's or LS1's 6.0 swapped here, and for reference I'm pretty sure its unfair to call an LT1 late model...that thing was ancient as soon as it started __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-19-2011, 09:48 PM	#10
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: late model small blocks like LT1's or LS1's running an LT1 is the mechanical equivalent to being lefthanded __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-21-2011, 09:15 PM	#11
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: late model small blocks like LT1's or LS1's the genII sbc LT1/LT4 swaps were hot several years ago. No days you're passing on power you could have by selecting one. The gen III/IV sbc motors are the way to go. From 4.8L on up to 7.0L.... and more with the aftermarket LSX blocks. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

09-22-2011, 09:49 PM	#13
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: late model small blocks like LT1's or LS1's the 8.1 is a whole 'nother animal...and yes it would be considered a big block. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

09-23-2011, 03:55 PM	#14
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: late model small blocks like LT1's or LS1's i know its a different block and motor altogether, but i guess it tends to get lumped into the same category on forums... __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

09-23-2011, 09:37 PM	#15
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: late model small blocks like LT1's or LS1's I think its more "vortec" then lsx. __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

09-24-2011, 11:10 PM	#17
69C-owner Registered User Join Date: Dec 2010 Location: Apison Tn Posts: 490	Re: late model small blocks like LT1's or LS1's Yay my thread got popular lol and Shon I like your style, I've always wanted to put a SBC in one of those fox bodies, right now I have a LT1 and a 4L60E i pulled out of a 95 Buick Roadmaster stationwagon, getting a 6speed from a trans am and rebuilding that LT1 then dropping both in my truck has crossed my mind a few times, i could get decent power out of the Pontiac 350 but id love getting good mpg's so I wont feel so bad at the gas station Posted via Mobile Device __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=43855069 LWB Fleet 1994 Buick Roadmaster 1994 GMC Sonoma

09-27-2011, 12:56 PM	#18
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,524	Re: late model small blocks like LT1's or LS1's I think the achilies heal of the LT1 is the optispark. To me it just made it relatively unreliable. __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

09-28-2011, 10:52 PM	#21
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: late model small blocks like LT1's or LS1's having not done the conversion myself I guess I can't really say firsthand, but there are countless threads on the subject. Same goes for machining SBC manifolds to fit the lt platform. Ends up being kind of the stepchild motor. Its not the pioneer like the sbc, but it never got all the way to "modern fuel injected", quite like the ls series. I mean there are some cool TPI manifolds, and it was cool to get fuel injection before things like the Holley and Edel-broke stand alone systems came out in force. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD



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