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

lt1 383 question

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Old Apr 7, 2011 | 05:04 PM
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so if i was to put a 383 shortblock on completly stock lt1 is there anything i need to do or does it bolt right up?
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Old Apr 7, 2011 | 05:16 PM
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well the block would bolt up as long as its a lt1 block (Gen 1 should bolt up also, but there are other issues with that)

not sure if that answers your question as its kinda vague and unclear
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Old Apr 7, 2011 | 06:31 PM
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What are you trying to accomplish?
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Old Apr 8, 2011 | 06:47 AM
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I suggest you do a search on this forum for "383" before you do anything else.
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Old Apr 8, 2011 | 08:38 AM
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Originally Posted by bizerk1
so if i was to put a 383 shortblock on completly stock lt1 is there anything i need to do or does it bolt right up?
If you buy a complete 383 shortblock (machined and assembled), it will bolt right in place where the old 350 was.
My guess is that you will want a larger cam and better heads to compliment it though.
The increase in displacement alone isn't worth a whole lot.
You'll also need a tune.


Now if we're talking about a long-block, yeah .. bolt it up and tune it.

Originally Posted by RamAir95TA
I suggest you do a search on this forum for "383" before you do anything else.
Research is a good thing ... buying a new motor isn't a cheap project.
Expect to spend a minimum of 5-10k on the project if it's done right.
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Old Apr 8, 2011 | 11:47 AM
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just cause if my bottom end is bad now I mine as well do 383 i figure then do it and get heads and cam in yr, what problems could there be or would it be ok . ILL do a search
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Old Apr 8, 2011 | 12:32 PM
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You could run a 383 on stock heads/cam, but don't expect any HP increase. In fact I'd be willing to bet you'd LOSE some.
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Old Apr 8, 2011 | 01:36 PM
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Originally Posted by bizerk1
just cause if my bottom end is bad now I mine as well do 383 i figure then do it and get heads and cam in yr, what problems could there be or would it be ok . ILL do a search
Nothing wrong with that at all, just don't expect it to be any faster than what you have now.
You could also consider a 355 bottom end.

In the end, it's not just about cubes, it's about the entire package.
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