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5.3L Lm7 conversion queries

logan binns

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Hey. Im wondering if anyone can tell me whats involved in a swap from a blowen up ls1 engine in a vx, to a lm7 5.3l engine as i would like to turbo it in the future. Wanting to know if its a straight forward swap and if the ls1 ecu would run the 5.3 once retuned.thanks for your help.
 

_R_J_K_

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Most people here probably won't be able to help as these engines never came out in Australia (can't speak for NZ). I'd suspect it would be pretty straight forward and that you could use an LS ECU given they're from the same family and generation, probably worth trying to track down info about what kind of method they use to get their crank angle signal. There's a chance they use different sensors because they weren't used by Holden, in which case that would be a custom loom at the minimum. You'd also probably have to get an engine with all the ancillaries as they look like they mount differently to the LS1.

What makes you think this engine would be better to turbo than a LS1 though?
 

logan binns

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Most people here probably won't be able to help as these engines never came out in Australia (can't speak for NZ). I'd suspect it would be pretty straight forward and that you could use an LS ECU given they're from the same family and generation, probably worth trying to track down info about what kind of method they use to get their crank angle signal. There's a chance they use different sensors because they weren't used by Holden, in which case that would be a custom loom at the minimum. You'd also probably have to get an engine with all the ancillaries as they look like they mount differently to the LS1.

What makes you think this engine would be better to turbo than a LS1 though?
Hey thanks for your reply, in nz we havent got alot of these engines either. Thanks for the info about the c.a.s will look into it. The reason i would like the lm7 is due to the iron block and the unreal power being made in america with these engines with a standard bottom end over 1000hp in some cases. As long as they have 160 thou miles or more they hold together well from my research. They are very cheap in america and even imported here they are cheaper than our ls1's. But as you can imagine trying to find out info on swaps into holdens is difficult. Just trying to see what im in for.
 
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