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a random question about different g13bb's

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446 views 15 replies 4 participants last post by  georgerousakis1963  
#1 ·
hello first proper post of many hopefully! I'm working on an engine swap in my little alto and for the purpose i'm using a g13bb out of a wagon r. This engine has about 74Bhp but i know that some g13bbs have 84bhp, i think those are the ones in the jimny's, I'm just wondering what the differences are in the two set up? is it a better manifold and exhaust system? or is it just to do with the mapping?

Cheers :D
 
#2 ·
I don't see that much more power just being made by changing the maps, you're going to need more airflow, so better intake & exhaust would be one way to approach it - a quick glance at the parts catalog shows the Jimny uses a different camshaft, so that's another possibility.
 
#8 ·
I think you may find theres subtle differences in head design, valve size, definitely cams and the rest of the internal bits.
Compression ratio varies between 10:1 and 11.5 which us a bit more than just a cam.