Originally I wanted to use 11.1:1 pistons, put it more on the level of the F20 honda engine. But then it runs into issues such as NOX emissions (which the F20 runs on a different emissions system so does the bimmer, I still use OBD1). The question isn't can the KA run on 91 octane with a compression of 10.5:1 (probably yes, will it pass smog... NO, would I have to worry about knock and ping...Maybe with the stock timing @20BTDC)... The key to designing a NA KA is also to fool the smog tech IMO. The greater the CR the greater risk of the engine not passing NOX. I've been studying this crap for a year to get it down right. Timing has much to do with passing smog as well as building an engine to new CR specs. You simply can't just build something and think it will pass. All that is aloud for me to pass smog in timing is +/- 3 degress from the 20BTDC (thats all I get to play with)....
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Originally Posted by Jeff240sx
Thinking Vinny's pull was 3rd gear?
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That isn't my dyno that is Scotts dyno, I'll find the link so you can see for yourself. He had high 14's in the 1/4mile, better times than the Acura RSX type-s, or the Sentra SE-R specV..... Now his engine is turbo charged......
Found it!!!! I rated it at 165. I guess the dyno was really 169...........
http://www.geocities.com/wssnider/240sxDYNO.html