davecara Posted July 31, 2023 Posted July 31, 2023 Anyone know the CR off the top of their head? Thinking of a cheap way to an N/A 1216 using bits I’ve already got Quote
davecara Posted July 31, 2023 Author Posted July 31, 2023 That’s too much work. I’ll find a used 1216 kit or pistons at least then. I’ve got a gsxr dot head and those RS38’s to use. Should be able to build something lively! Quote
clivegto Posted July 31, 2023 Posted July 31, 2023 7 minutes ago, davecara said: That’s too much work. I’ll find a used 1216 kit or pistons at least then. I’ve got a gsxr dot head and those RS38’s to use. Should be able to build something lively! Just fit the dot head to sumat it'll make you smile. Quote
davecara Posted July 31, 2023 Author Posted July 31, 2023 I knew I should grabbed that powerscreen lump off @Ben Slabby Quote
spiderpig Posted July 31, 2023 Posted July 31, 2023 3 hours ago, clivegto said: You need to deck the block. Or busa rods and base spacer? Quote
Duckndive Posted August 1, 2023 Posted August 1, 2023 (edited) 18 hours ago, davecara said: Anyone know the CR off the top of their head? Thinking of a cheap way to an N/A 1216 using bits I’ve already got I did real world sums on the 1216 "busa pistons" one I built using a 1100 Head "28cc" So if you substitute the 28cc "1100" chamber and use 23cc dot chamber into a calculator e.g. here https://www.summitracing.com/newsandevents/calcsandtools/compression-calculator You get 9.55:1............... Edited August 1, 2023 by Duckndive Quote
Duckndive Posted August 1, 2023 Posted August 1, 2023 For what its worth another Busa piston 1216 I have with a worked 1100M head made 129bhp on RS38s that were way out 1 Quote
davecara Posted August 1, 2023 Author Posted August 1, 2023 3 minutes ago, Duckndive said: For what its worth another Busa piston 1216 I have with a worked 1100M head made 129bhp on RS38s that were way out That looks promising! Quote
Duckndive Posted August 1, 2023 Posted August 1, 2023 33 minutes ago, davecara said: That looks promising! Yes even with the carbs being miles off it was fun That engine is now in the Zuma that I,m putting the Sims & Rohm kit on Quote
davecara Posted August 1, 2023 Author Posted August 1, 2023 Was that on busa rods too or just a low CR 1216 engine with headwork? Quote
Duckndive Posted August 1, 2023 Posted August 1, 2023 1 hour ago, davecara said: Was that on busa rods too or just a low CR 1216 engine with headwork? Just Busa pistons on GSXR rods ,,the head has some nice work done to it I'm not sure on cams "i think there stock" but I forgot to check when I had the cam cover off a couple years ago Quote
spiderpig Posted August 1, 2023 Posted August 1, 2023 I've a ported, skimmed dot head with reground cams going on slabby bottom, busa pistons and rods for pussy liquor when that builds finished. Will try measure the head volume over the weekend. 1 Quote
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