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Discussion Starter · #6 ·
The reason i'm asking is i'm planning a new drift car build for next year, making it a more focused machine than what i currently have. Weight loss is a major factor and i don't want to add any weight that doesn't need to be there, still only guessing can anyone tell me for sure which is lightest?
 

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Surely bhp is more important, or at least bhp per kilo?

Sorry I can't help on actual weights though, but logic says the '20 would be lightest...
 

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I have weighed all the RB26 stuff, I just never got into RB20 or RB25. Not that many of them here in the US, kind of a waste of time.

I would say the overall structure, the deck heights, and everything else is about the same so they should weigh about the same.

Not a light engine, and also a long and tall engine.

Going by weight and output - LS1.
 

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I would say the lightest RB block would be the RB25. It is definately lighter than the RB26 block, (having handled both) as the webs are thinner, but not by much.

And RB25 lighter than RB20 as it has bigger holes in it. 86mm vs 78mm :)
 
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