LT1 rebuild.
Thread Starter
Teching In
Joined: Jul 2012
Posts: 27
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LT1 rebuild. A few months ago I blew the 7th cylinder in my car.. Here are some pictures to make you all happy 
This is my 93 T/A lt1
This is what I found after removing the valve covers and the intake..
Now I have the engine and transmission out of the car..
The motor is almost ready for tear down. It will probably happen sometime tomorrow or within the next week. When I pulled the motor I looked into the 7th and found NO piston. It was completely gone! I figure the skirts of the piston broke then the piston head turned side ways and came up to smack the heads...
Now my question is.. what cam should I go for? I am having the machine shop pick out my piston heads and bottom end. I just want to hear what a good streetable cam would be and would give good hp/torque.
This is my 93 T/A lt1
This is what I found after removing the valve covers and the intake..
Now I have the engine and transmission out of the car..
The motor is almost ready for tear down. It will probably happen sometime tomorrow or within the next week. When I pulled the motor I looked into the 7th and found NO piston. It was completely gone! I figure the skirts of the piston broke then the piston head turned side ways and came up to smack the heads...
Now my question is.. what cam should I go for? I am having the machine shop pick out my piston heads and bottom end. I just want to hear what a good streetable cam would be and would give good hp/torque.
TECH Veteran
Joined: Apr 2008
Posts: 4,985
Likes: 112
before you jump into what cam....have the machine shop confirm if the block and crnk are salvageable. at best you will need a .030 bore which at that point a 355 or 383 if going to a stroker rotateing assembly.
I would send the heads to Lloyd elliott to determine if they are also salavageable and go on his advice from there and also a cam.
depending on the condition of block & heads will impact decisions on how to move forward.
you will need to decide if you want a NA or power adder motor and select the correct bottom end build to accomadate and then have LE do heads/cam package
I would send the heads to Lloyd elliott to determine if they are also salavageable and go on his advice from there and also a cam.
depending on the condition of block & heads will impact decisions on how to move forward.
you will need to decide if you want a NA or power adder motor and select the correct bottom end build to accomadate and then have LE do heads/cam package
TECH Regular
Joined: May 2013
Posts: 467
Likes: 2
From: Lincoln NE
before you jump into what cam....have the machine shop confirm if the block and crnk are salvageable. at best you will need a .030 bore which at that point a 355 or 383 if going to a stroker rotateing assembly.
I would send the heads to Lloyd elliott to determine if they are also salavageable and go on his advice from there and also a cam.
depending on the condition of block & heads will impact decisions on how to move forward.
you will need to decide if you want a NA or power adder motor and select the correct bottom end build to accomadate and then have LE do heads/cam package
I would send the heads to Lloyd elliott to determine if they are also salavageable and go on his advice from there and also a cam.
depending on the condition of block & heads will impact decisions on how to move forward.
you will need to decide if you want a NA or power adder motor and select the correct bottom end build to accomadate and then have LE do heads/cam package
Get the info from the shop on what they recommend BEFORE they buy. Many shops will lower compression on LT1s not comprehending how high the stock compression was or that performance builds should be over 11:1 for NA. Hell most heads/cam motors are over 11:1 on stock shortblock.
If they mention a cast new crank replacement walk away they are aiming to build weaker than stock.
I would strongly encourage you to just get a used LT1, it will be better than a budget halfassed average machineshop
rebuild".
If they mention a cast new crank replacement walk away they are aiming to build weaker than stock.
I would strongly encourage you to just get a used LT1, it will be better than a budget halfassed average machineshop
rebuild".
10 Second Club
Joined: Oct 2007
Posts: 2,630
Likes: 28
I wouldn't even waste time trying to repair that cylinder head when you can find stock heads for dirt cheap. Fixing all of those dings requires welding, machining, and heat treating. That's fine if it's an expensive set of aftermarket heads.
Banned
Joined: Jan 2013
Posts: 588
Likes: 0
From: Las Vegas
U can sleeve that cyl if needed to reuse that block. 'bout $200 most shops. And now is the time to have some fun building with all the goodies u wanted. U can nail your compression ratio to your cam (or cam to c.r. if u want) and build in good quench height for free power. Even with using stock heads a good 3 to 5 angle vlv job will add power and a good vlv spring is a must. Stroke is now your choice so get ready to crunch some numbers.
Sorry to see the bad news but thx for sharing as it helps us all and good luck with the rebuild,
cardo
Thread Starter
Teching In
Joined: Jul 2012
Posts: 27
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I all ready have spare heads guys. I have had them for a while. I know about the machine shop. A very close friend of mine has worked with maching for a few years and says the block will be 30 over and will need to be sleeved on a cylinder. How ever we are unsure on the crank. If the crank is good I am going to just keep stock, if it is bad. Well 383 time 
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Registered User
Joined: Aug 2013
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I all ready have spare heads guys. I have had them for a while. I know about the machine shop. A very close friend of mine has worked with maching for a few years and says the block will be 30 over and will need to be sleeved on a cylinder. How ever we are unsure on the crank. If the crank is good I am going to just keep stock, if it is bad. Well 383 time
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Registered User
Joined: Aug 2013
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I am not sure where u are located but i have a great condition stock bore LT1 long block with factory aluminum heads i will sell. complete from oil pan to intake needs only pistons and reassembly.good crank rods and camshaft. make offer
Thread Starter
Teching In
Joined: Jul 2012
Posts: 27
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Thank you for the offer but, I have a spare set of heads and intake ect from another long block that o picked up for 100 $.
355, 383, 94, 95, camaro, crankshaft, kit, ls1, lt1, lt1rebuild, master, performance, rebuild, salvageable, trans
