LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 383 or LS1

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Old 05-15-2011 | 09:46 AM
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Originally Posted by ELTEE1
In my head the 383 conf seems like it it would run faster but i've seen members sig where h/c/i cars are only running high 12's and i've seen full exhaust ls1 cars with a lid and dr's get that. from that standpoint the lsx sound better but would the setup i listed above not make comparable power?
Anyone with a h/c/I ltl running high 12's either doesn't have the necessary driveline/suspension mods or just has no experience racing. I ran times below with just boltons and the hotcam, bone stock heads/intake at the time.
Old 05-15-2011 | 09:59 AM
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Just to put an LS1 into an LT1 car will cost you anywhere from $1500-$2000. There are a lot of parts you will need.

k-member= $450 for tubular
headers=$450
accessories=$250ish ebay
pcm=$150
wiring harness=$150ish
torque converter=$600
Not sure if the LT1 radiator will work either. The inlet and outlet might be in the wrong spot.
Old 05-15-2011 | 10:41 AM
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It's probably a lot more $$$ if you're an m6. Afaik you can't use the lt1 t56/clutch assembly with an ls1 either. At least with an a4 the trans will work in either car.
Old 05-15-2011 | 11:15 AM
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So a forged LT1 would be the best way to go
Old 05-15-2011 | 12:31 PM
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The only economical way to swap in an LS1 motor is if you have a donor car that you can rob everything from. That is the best way to do it.
Old 05-15-2011 | 09:05 PM
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Originally Posted by Camaroking1996
So a forged LT1 would be the best way to go
what would i need .30 over piston and h-beams? also would this cam be better in a 355 with p&p heads
Intake Duration at 050 inch Lift 231
Exhaust Duration at 050 inch Lift 239
Duration at 050 inch Lift 231 int./239 exh.
Advertised Intake Duration 282
Advertised Exhaust Duration 290
Advertised Duration 282 int./290 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.535 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.550 in.
Valve Lift with Factory Rocker Arm Ratio 0.535 int./0.550 exh.
Lobe Separation (degrees) 110
than a gm 846? it says it isn't computable compatable? why is this (110lsa?) once again sorry about questions.
Old 05-15-2011 | 10:04 PM
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Originally Posted by GREGG 97Z
It's probably a lot more $$$ if you're an m6. Afaik you can't use the lt1 t56/clutch assembly with an ls1 either. At least with an a4 the trans will work in either car.
An lt1 t56 will work with little modding. Youll need an LS1 t56 input shaft, clutch kit, and bellhousing.
Old 05-15-2011 | 10:06 PM
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Originally Posted by joelster
The only economical way to swap in an LS1 motor is if you have a donor car that you can rob everything from. That is the best way to do it.
He could use used parts and a truck motor. Thats what im doing.
Old 05-15-2011 | 10:49 PM
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Well if we knew your budget that would be a huge help like everyone is saying unless the car is an LSX car all the parts to just switch it over is going to cost quite a bit before you even get to modding the LSX motor.

But Call LE/AI depending on your budget on your choice and like said before if you have a 12 second H/C/I LT1 there is something wrong in the set up getting it to the ground you have to check the Traps of them cars and see what kind of number it should be CLOSE to running
Old 05-15-2011 | 11:17 PM
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LS1

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Old 05-15-2011 | 11:18 PM
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Originally Posted by Lawhead
Well if we knew your budget that would be a huge help like everyone is saying unless the car is an LSX car all the parts to just switch it over is going to cost quite a bit before you even get to modding the LSX motor.

But Call LE/AI depending on your budget on your choice and like said before if you have a 12 second H/C/I LT1 there is something wrong in the set up getting it to the ground you have to check the Traps of them cars and see what kind of number it should be CLOSE to running
a pretty low budget, what i'm considering is a forged 355 with the cam talked about above or gm 847 and having my friend's dad who owns a machine shop port the stock heads and put larger valves in. could he use a le/ai gasket and port them that far? and also is a 96 block interchangeable with everything else 95?
Old 05-15-2011 | 11:22 PM
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I still say ls because you have dependability and great power output. I found this thread and ive been running full force in swapping an ls in mine. https://ls1tech.com/forums/conversio...de-1500-a.html
Old 05-15-2011 | 11:31 PM
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Originally Posted by lethal bird
I still say ls because you have dependability and great power output. I found this thread and ive been running full force in swapping an ls in mine. https://ls1tech.com/forums/conversio...de-1500-a.html
i dont see a 5.3 putting down the torque a lt1 does. plus i wanna keep my 6speed, your guide was useless for my application.
Old 05-15-2011 | 11:32 PM
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Originally Posted by ELTEE1
a pretty low budget, what i'm considering is a forged 355 with the cam talked about above or gm 847 and having my friend's dad who owns a machine shop port the stock heads and put larger valves in. could he use a le/ai gasket and port them that far? and also is a 96 block interchangeable with everything else 95?
Well pretty low budget can mean lots of things lol

Not sure what you mean by gasket from LE or AI??

If he knows what hes doing he can port them for you probably won't see results that both LE and AI will show but never know there is a guy on another forum running mid 11's with a set of home ported heads so just because AI or LE doesn't do it doesn't mean it won't perform. But Call on of them companies to get a cam for sure tell them your goals and they will guide you in the right direction.

All LT1 blocks are interchangeable
Old 05-15-2011 | 11:52 PM
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Originally Posted by Lawhead
Well pretty low budget can mean lots of things lol

Not sure what you mean by gasket from LE or AI??

If he knows what hes doing he can port them for you probably won't see results that both LE and AI will show but never know there is a guy on another forum running mid 11's with a set of home ported heads so just because AI or LE doesn't do it doesn't mean it won't perform. But Call on of them companies to get a cam for sure tell them your goals and they will guide you in the right direction.

All LT1 blocks are interchangeable
thanks so much! by low budget i mean im 16 impatient and work for a landscaping company, but im selling my auto 94 z28 for hopefully $2k, i mean using the gasket they use on the intake and exhaust. My friends dad is doing it for free because i give his son a ride home ed. Everyone in the area brings their heads and blocks for dirt track cars and drag cars to so i guess he pretty good.
Old 05-16-2011 | 12:02 AM
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Originally Posted by Camaroking1996
Build your own stroker with stock crank... That will save you about 600-800 bucks.. And with that money you can put a bigger cam and heads on it and be faster than an Ls1
HUH?? how do you build a stroker with a stock crank??



The LS1 swap will cost you a good bit to do as there is a lot of misc...check out my build thread and it will give you a good idea...
Old 05-16-2011 | 12:07 AM
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LT1 heads like everyone on here is going to say are real touchy there are water passages you don't want to port to far and hit and such but like I said both AI and LE were at one time "small companies" that no one has ever heard of thats where I don't like close minded people on there is only 2 porters in the world here and no other will do.

but if you can get your heads put together for free thats a HUGE chuck of cash saved there

but going to need supporting mods

-Headers
-Roller rockers
- Push rods
-Guide plates
-Clutch
-Rear end because yours has a high chance to blow up as soon as you put a sticky tire on it some people they live for some not you might get lucky
-Gaskets
-Fluids
-Cam

List goes on and on it gets expensive I have about 4k in my set up going in my car now and bought the motor built H/C/I so you can see where it adds up with all the supporting mods. I'd get all them first then go find a blown up LT1 some where and start over on the stand while you can enjoy your car while you build the one on the stand.
Old 05-16-2011 | 12:19 AM
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Originally Posted by Lawhead
LT1 heads like everyone on here is going to say are real touchy there are water passages you don't want to port to far and hit and such but like I said both AI and LE were at one time "small companies" that no one has ever heard of thats where I don't like close minded people on there is only 2 porters in the world here and no other will do.

but if you can get your heads put together for free thats a HUGE chuck of cash saved there

but going to need supporting mods

-Headers
-Roller rockers
- Push rods
-Guide plates
-Clutch
-Rear end because yours has a high chance to blow up as soon as you put a sticky tire on it some people they live for some not you might get lucky
-Gaskets
-Fluids
-Cam

List goes on and on it gets expensive I have about 4k in my set up going in my car now and bought the motor built H/C/I so you can see where it adds up with all the supporting mods. I'd get all them first then go find a blown up LT1 some where and start over on the stand while you can enjoy your car while you build the one on the stand.
will my shorties work? I already have a block from a 96 so im gonna assemble a long block with the cam becuase i hate working on it because everything is so tight, the first thing im doing is getting a ram powergrip hd and some 3.73's im gonna weld up with a 7/8 rod, id have to buy the valves, what are some good brands? sodium? hollow? what would i need to do the 355 part just pistons, rod bearings, arp bolts all through the motor?
Old 05-16-2011 | 12:37 PM
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Originally Posted by ELTEE1
i dont see a 5.3 putting down the torque a lt1 does. plus i wanna keep my 6speed, your guide was useless for my application.
The guide doesnt have to be a 5.3, Im using a lq9 the guide is just to show you that its not as expensive as you would think and you can keep your 6 speed. The only difference in the lt1 and ls1 6speed is the input shaft is slightly longer, the clutch kit, and the bellhousing.
Old 05-16-2011 | 06:24 PM
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Originally Posted by lethal bird
An lt1 t56 will work with little modding. Youll need an LS1 t56 input shaft, clutch kit, and bellhousing.
Thats good to know, maybe its not as difficult as I thought it would be...


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