kiwisuzuki1100nz Posted November 21, 2019 Posted November 21, 2019 Has anyone done their own head work? I mean casting clean up etc... and how successful was it? Any real dyno proof / photos? Quote
ELLESS Posted November 21, 2019 Posted November 21, 2019 Hi Kivi,I found these fotos on the I net. Are supposed to be very good. Good luck with the old cow! Quote
Gixer1460 Posted November 21, 2019 Posted November 21, 2019 Good pictures but fairly extreme for 'home porting'. All depends on use, ie. the above good for competition but epoxy work and shortened guides IMO really not good idea for a road bike long term. I've cleaned up a few heads - car and bike, and can't give conclusive improvement results as this work was usually done with other improvements not independently! Only advice i'd offer is don't go mad removing metal, just clean off flash and mold lines, blend manifolds / gaskets / ports to each other, semi rough grind finish to inlet port - exhaust can be more polished, watch out for the valve seats as easy to 'kiss' with the stone then they'll need cutting ! 3 Quote
dupersunc Posted November 21, 2019 Posted November 21, 2019 Focus on the combustion chambers. The valves on the 1100 are quite small, so there are good gains in unshrouding the valves. this obviously lowers the cr a bit, so skimming the head to get the cr back is worth while with stock pistons. Stick some old valves in the head to avoid damaging the seats Port wise, clean up the short side radius, and blend in the throat around the seats, and match the ports to the carb rubbers, make the ports, 0.5mm bigger than the boot for best flow The Pictures above are pretty good. Similar here, but slightly better imho. This head below made 156bhp on stock valves and a 1216cc kit. 5 Quote
ELLESS Posted November 21, 2019 Posted November 21, 2019 Nice pics Dunc, whit what carbs,cams and exhaust? Quote
dupersunc Posted November 21, 2019 Posted November 21, 2019 1 hour ago, ELLESS said: Nice pics Dunc, whit what carbs,cams and exhaust? Kent SUZ1 inlet. stock exhaust. can t remember the timing figures. Fcr41 carbs, micron 4-2-1 exhaust. ignitech ignition with quite a lot of advance. Quote
ELLESS Posted November 21, 2019 Posted November 21, 2019 Thank You,this is going too be expensive,but WTF you have one life. 1 Quote
Gixer1460 Posted November 21, 2019 Posted November 21, 2019 2 hours ago, dupersunc said: Kent SUZ1 inlet. stock exhaust. can t remember the timing figures. Fcr41 carbs, micron 4-2-1 exhaust. ignitech ignition with quite a lot of advance. Wow - seems my 1186 motor making 144hp wasn't too bad! M head with only port clean up, 36mm CV's, Dynojetted, std cams, Dyna 2000 and a 4-2-1 one off pipe set and V&H Supersport can. 2 Quote
kiwisuzuki1100nz Posted November 23, 2019 Author Posted November 23, 2019 Thanks everyone. Appreciate the comments. I'm gonna go ahead and give it a go. Impressive 144bhp with stock cams Quote
Boothy Posted November 24, 2019 Posted November 24, 2019 All this info is very good guys, but I cant help think that we are missing the main point here in this thread, sod all the porting and tuning and dyno figures. But god damn that Betty Rubble has a fantastic figure.. what an arse..... Thanks go to Gixer1460 for inadvertently pointing that out to me.... Quote
bluedog59 Posted November 24, 2019 Posted November 24, 2019 But Leela (Futurama) is fit all over. 1 Quote
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