I wonder how is the idle with comp ratio of 15:1
even 13:1 ...I can't think of 1 engine that runs with this compression stock(honda K20 runs 12:1)

 

I've seen/heard Honda engines (B18) with 13.5:1, revving as high as 10,000 rpm. Had ITBs,ECU, custom header, sick *** cams and all the works. The beautiful thing is that it idled nice, if a little high. It idled about 1200 rpm

 

ya, but you can buy high rev valve train kits for hondas to rev that high. nobody has done this with a ralliart i don't think.