Do L98 and LT1 Rotating Assemblies Interchange?
Do L98 and LT1 Rotating Assemblies Interchange? Hey guys. Sorry if this is a dumb question. I did search, BTW.
I have a stock low miles (32K) L98 Corvette shortblock that I'm putting into a 260Z. I want to convert this motor to a decent 383 as cheaply as I can... meaning little/no machine work, lightly used parts, and transplanted Edel. heads/intake, and roller rockers from my Gen1 SBC. I want forged rods and pistons so I can spray at least 100HP of giggle gas. I want at least 500 WHP including the nitrous.
My question isn't about the build, i.e. CR, induction, heads, cam, headers, NO2 systems, etc.
I just need to know if an LT1 rotating assembly will fit my L98 from a 1991 Corvette. The crank does have the large one piece seal.
I have a stock low miles (32K) L98 Corvette shortblock that I'm putting into a 260Z. I want to convert this motor to a decent 383 as cheaply as I can... meaning little/no machine work, lightly used parts, and transplanted Edel. heads/intake, and roller rockers from my Gen1 SBC. I want forged rods and pistons so I can spray at least 100HP of giggle gas. I want at least 500 WHP including the nitrous.
My question isn't about the build, i.e. CR, induction, heads, cam, headers, NO2 systems, etc.
I just need to know if an LT1 rotating assembly will fit my L98 from a 1991 Corvette. The crank does have the large one piece seal.
The crank will fit but is heavire than the LT1 piece and will not balance right. A 1pc rear main 305 crank is closer to the stock LT1 crank.
Rod,pistons, timing set(with EWP) ect will interchange.
The head will need to be converted for reverse cooling which is about 400 bucks and depending on which Edelbrock heads you have it probably isn't worth the money to do. The intake bolt pattern is different as well and will need to be addressed.
After all this work you will have a cobled together engine that if you are lucky will make as much power as a stock LT1.
I would just rebuild it with stock pieces.
Rod,pistons, timing set(with EWP) ect will interchange.
The head will need to be converted for reverse cooling which is about 400 bucks and depending on which Edelbrock heads you have it probably isn't worth the money to do. The intake bolt pattern is different as well and will need to be addressed.
After all this work you will have a cobled together engine that if you are lucky will make as much power as a stock LT1.
I would just rebuild it with stock pieces.
ALL: Thanks for your help!!
95ttoplt1: This is an LT1 rotating assembly going into an L98 block. Are you saying that this setup can't be properly balanced? Also, the L98 rear main is different than the LT1?
95ttoplt1: This is an LT1 rotating assembly going into an L98 block. Are you saying that this setup can't be properly balanced? Also, the L98 rear main is different than the LT1?
The LT1 assembley will work, I thought you were going the other way.
Putting a stock LT1 crank into you L98 block will not make a 383 though??
All the Short block pieces are interchangeable. The piston and rod assembley for an LT1 is lighter than a standard 350, more along the lines of the 305 bob weight. If you swap pistons rods and pistons as an assembley with the flex plate and balncer the balance shouldn't be a problem.
Is the LT1 a 383 already??
Putting a stock LT1 crank into you L98 block will not make a 383 though??
All the Short block pieces are interchangeable. The piston and rod assembley for an LT1 is lighter than a standard 350, more along the lines of the 305 bob weight. If you swap pistons rods and pistons as an assembley with the flex plate and balncer the balance shouldn't be a problem.
Is the LT1 a 383 already??
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Thanks everyone!! This is great news. The lighter components will make this a faster revving engine 
95ttoplt1: Yes... the rotating assembly is from a 383 LT1.
Now... I just need to make sure the assembly is for stock bore and bearings!!
95ttoplt1: Yes... the rotating assembly is from a 383 LT1.
Now... I just need to make sure the assembly is for stock bore and bearings!!
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