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I got a project with already installed carb and hei distributor. But never completed.
I got a fresh rebuilt LT1 that is bored .030 over and appears to be balanced and stroker pistons installed. Pulled a head to see pistons and appears stroker pistons installed. Motor is drilled at the crank, rods appear to be shaved, new cam, new heads. Only problem I have no info on any of it.
I'm a newbie to LT1!
Going to attach some pics of new motor for clarification.
The 4L60e is rebuilt with upgrades, I also have TCI Ez Tcu with TPS for it to install.
Help in clarification would be much Appreciated.
Need timing plug and Harmonic and flexplate yet figure out. I believe dampner is on back order, I believe I need 6.75"...
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Discussion Starter · #2 · (Edited)
View attachment 32749
View attachment 32748
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I got a project with already installed carb and hei distributor. But never completed.
I got a fresh rebuilt LT1 that is bored .030 over and appears to be balanced and stroker pistons installed. Pulled a head to see pistons and appears stroker pistons installed. Motor is drilled at the crank, rods appear to be shaved, new cam, new heads. Only problem I have no info on any of it.
I'm a newbie to LT1!
Going to attach some pics of new motor for clarification.
The 4L60e is rebuilt with upgrades, I also have TCI Ez Tcu with TPS for it to install.
Help in clarification would be much Appreciated.
Need timing plug and Harmonic and flexplate yet figure out. I believe dampner is on back order, I believe I need 6.75"...
I could use some knowledge from LT1 guys. Not sure if neutral flexplate or balanced is what I need.
I have read days worth on these lt1 platforms...
Please chime in, I'm not a novice wrencher, and I believe knowledge is Paramount!
Thanks
View attachment 32746
View attachment 32745
 

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The way to tell if lt1 has been converted to 383 is to measure the piston travel from tdc to bdc. If travel is 3.48" or there abouts, it's a 350.

If piston travel is in in the 3.65" to 3.75" range, then it would be a 383.
 

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Discussion Starter · #4 ·
The way to tell if lt1 has been converted to 383 is to measure the piston travel from tdc to bdc. If travel is 3.48" or there abouts, it's a 350.

If piston travel is in in the 3.65" to 3.75" range, then it would be a 383.
Ok. This is a start. I appreciate that info. WILL GET BACK TO YA.
I also have no idea if this crank was balanced with fkexplate or not. I got mixed answers about to go neutral balance or weighted.
This is why I love these forums.
 

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Discussion Starter · #5 ·
The stroke is 3.75"... Thanks for that. Im still unclear if I should use a weighted flexplate?
Not knowing if its balance with or without neutral flexplate
 
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