mr_rbman Posted June 13, 2005 Author Share Posted June 13, 2005 the big question is, was the bottom end built for a rb31DET, or an ET. if it was built for the latter the compression ratio will be too low nah its built for an RB31DET not a turbo bottom end as such, as long as i get the right head gasket the compression should be around the 8.5:1 which is what i'm after! the pistons are na pistons but they have also been ceramic coated too and seeing as i'm only after an absolute maximum of 300rwkw's i think i won't have anything to worry about with this bottom end, most of my money i intend on using for tuning! Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1405951 Share on other sites More sharing options...
mr_rbman Posted July 22, 2005 Author Share Posted July 22, 2005 Pics have obviously been added, i now have the head, once its been inspected i will be bolting everything together, shouldn't be too much longer now! Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1478438 Share on other sites More sharing options...
Angry Posted July 22, 2005 Share Posted July 22, 2005 nice pick up man .. gives me some scope on how much i should be lookin at getting my new project motor underway.. keeps up to date on the build man. .interested to see how u go.. Matt Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1478496 Share on other sites More sharing options...
StockyMcStock Posted July 22, 2005 Share Posted July 22, 2005 bore number 4 has rust on it and he painted over the nice brass welch plugs, as if you would! Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1479581 Share on other sites More sharing options...
mr_rbman Posted July 25, 2005 Author Share Posted July 25, 2005 bore number 4 has rust on it and he painted over the nice brass welch plugs, as if you would! ye i know its starting to get rust, was perfect before i got it, its all covered up with heaps of sheets but the cold weather is hurting it, i don't have a shed to put it in so how can i prevent this? You won't see the engine once its in the car so it doesn't bother me them being painted! Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1482786 Share on other sites More sharing options...
StockyMcStock Posted July 25, 2005 Share Posted July 25, 2005 carefully remove the surface rust with light grade sandpaper - try and mimic the finish of the honing already there. an oil stone would be best if you can get it, just take the very surface of it off. then coat the bores with oil. lots of oil. engine assembly lube would be better, it's a bit thicker and won't fall off the surface as easily. put the sump on and tape over the top face to keep air out, it won't rust. Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1483024 Share on other sites More sharing options...
mr_rbman Posted July 26, 2005 Author Share Posted July 26, 2005 cheers stocky, as always very helpful! Link to comment https://www.sau.com.au/forums/topic/76386-max-youd-pay-for-this-bottom-end-rb31det/page/2/#findComment-1484346 Share on other sites More sharing options...
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