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| RE 1098 pistons https://www.ausmini.com/forums/viewtopic.php?f=5&t=96489 |
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| Author: | minivan60 [ Tue Dec 19, 2017 5:16 pm ] |
| Post subject: | RE 1098 pistons |
Hi all,I need advise.Im building 0'80" overbored 1098 to my van.I also have a nice 12G202 with bigger valves etc.It's been skimmed and the chamber volume is 24cc.I need to get compression ratio down to 10:1.My question is how much there is meat on top of these pistons? Is it possible machine dishes which are about 5cc? Cheers, Tomi |
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| Author: | drmini in aust [ Wed Dec 20, 2017 4:25 am ] |
| Post subject: | Re: RE 1098 pistons |
Don't machine the pistons, open the chambers out around the valves for better breathing. Edit And if running 98 fuel you can go to 10.5:1 or so. |
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| Author: | minivan60 [ Wed Dec 20, 2017 5:44 am ] |
| Post subject: | Re: RE 1098 pistons |
Thank's for reply.I dont know is there enough metal left for 5cc.I have to check piston to deck height. |
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| Author: | drmini in aust [ Wed Dec 20, 2017 5:48 am ] |
| Post subject: | Re: RE 1098 pistons |
You can make those chambers much bigger. [edit] When decking these old heads it's wise to stop at .075". The deck is thin in places with corrosion and won't clamp the gasket well if you rip more off. |
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| Author: | minivan60 [ Wed Dec 20, 2017 5:54 am ] |
| Post subject: | Re: RE 1098 pistons |
Ok.So i leave pistons alone and start to work with head. Thank's Doc. Tomi |
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