N1GTR Posted March 9, 2009 Author Share Posted March 9, 2009 Computer program Dave to design things/parts Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4467768 Share on other sites More sharing options...
shanef Posted March 9, 2009 Share Posted March 9, 2009 Yeh its mainly used for 2d based drawings. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4468006 Share on other sites More sharing options...
DCIEVE Posted March 9, 2009 Share Posted March 9, 2009 electronic drawing board essentially Would anyone like to share pick-up designs, in particular the external? Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4468037 Share on other sites More sharing options...
shanef Posted March 9, 2009 Share Posted March 9, 2009 electronic drawing board essentiallyWould anyone like to share pick-up designs, in particular the external? I posted some pics of a sump i had done recently but cant remeber where i posted them, so here's some of the actual external pickup Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4468054 Share on other sites More sharing options...
T04GTR Posted March 10, 2009 Share Posted March 10, 2009 cool! hey so with these fancy uber strong billet main girdles, how does one adjust the endfloat of the crank if they are all tied in with countersunk bolts? Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4468704 Share on other sites More sharing options...
Adriano Posted March 10, 2009 Share Posted March 10, 2009 Narrow the thrust bearing Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4469082 Share on other sites More sharing options...
R.I.P.S NZ Posted March 10, 2009 Share Posted March 10, 2009 cool! hey so with these fancy uber strong billet main girdles, how does one adjust the endfloat of the crank if they are all tied in with countersunk bolts? Someone has had there thinking cap on, I wondered how long it would take for that to pop up. Rob Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4469552 Share on other sites More sharing options...
T04GTR Posted March 10, 2009 Share Posted March 10, 2009 ahah yeah. was driving home and thinking of all the rb,s ive built and it reminded me that every one ive built had to have a tap here or there to get the 4 thou.. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4469615 Share on other sites More sharing options...
shanef Posted March 10, 2009 Share Posted March 10, 2009 Im not an engine builder but i have discussed this with one and like adriano says its adjusted via the thrust bearing thickness or width of the cap. The cradle has zero effect on it other than width/alignment of the middle cap. So it boils down to how good the machinist is. Does that sound about right to you rob? Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4469633 Share on other sites More sharing options...
T04GTR Posted March 10, 2009 Share Posted March 10, 2009 read the nisan workshop manual? yes. if the girdle is perfectly aligned, no probs if the crank is at factory size and not an auto, and every block is differant, a thou here a thou there... i can see this being an issue. unless you supply a full range of NISSAN main bearings. you could supply instructions on how to use an oil stone if it goes in to tight. but what if it goes in at 5 or 6 thou? im just saying that there needs to be a way that the girdle can be adjusted. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4469926 Share on other sites More sharing options...
proengines Posted March 10, 2009 Share Posted March 10, 2009 read the nisan workshop manual?yes. if the girdle is perfectly aligned, no probs if the crank is at factory size and not an auto, and every block is differant, a thou here a thou there... i can see this being an issue. unless you supply a full range of NISSAN main bearings. you could supply instructions on how to use an oil stone if it goes in to tight. but what if it goes in at 5 or 6 thou? im just saying that there needs to be a way that the girdle can be adjusted. You only need to "adjust" it to get the upper and lower thrust faces level with each other, not to take up extra clearance by using one thrust face of the upper bearing and the opposite thrust face of the lower. If it has too much clearance you need o/s thrust bearings. If the caps/girdle etc are set up in the right place and countersunk fasteners used it shouldn't be any more of a problem than in many other engines where the caps are doweled to the block, VQ35 for instance. BTW, to answer a question a page back about the lower bellhousing bolt holes, I have sumps welded up and re-drill the bottom bolt holes. It's a bit fiddly but not a massive problem. I'll take some photos of the next one. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4470471 Share on other sites More sharing options...
T04GTR Posted March 11, 2009 Share Posted March 11, 2009 cool. thanks for clearing that up. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4470984 Share on other sites More sharing options...
R.I.P.S NZ Posted March 11, 2009 Share Posted March 11, 2009 The cradle has zero effect on it other than width/alignment of the middle cap. So it boils down to how good the machinist is. So when the block is line bored you have to also machine the sides of the center cap on the cradle to exactly match the sides of the center main in the block? Rob Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4471781 Share on other sites More sharing options...
T04GTR Posted March 11, 2009 Share Posted March 11, 2009 that would be an interesting machine. whats a conventional iron/iron or alloy/alloy line bore usualy cost? Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4471803 Share on other sites More sharing options...
shanef Posted March 11, 2009 Share Posted March 11, 2009 So when the block is line bored you have to also machine the sides of the center cap on the cradle to exactly match the sides of the center main in the block?Rob The sides are machined to size on the cnc and then the radius' are cut on the line borer. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4471940 Share on other sites More sharing options...
R.I.P.S NZ Posted March 11, 2009 Share Posted March 11, 2009 The sides are machined to size on the cnc and then the radius' are cut on the line borer. Ok, so how do you know every block is going to have its center main faces in exactly the same place relative to the outer perimiter rail bolt holes you are using to spigot the cradle? Rob Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4472597 Share on other sites More sharing options...
T04GTR Posted March 12, 2009 Share Posted March 12, 2009 an exhange program may be a solution? Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4473352 Share on other sites More sharing options...
shanef Posted March 12, 2009 Share Posted March 12, 2009 Ok, so how do you know every block is going to have its center main faces in exactly the same place relative to the outer perimiter rail bolt holes you are using to spigot the cradle?Rob Would there be more than ~20thou variations between the blocks though? There's 20thou clearance around all the countersunk holes, so there is room to move in that. How do you go about that? Urs would be similar with the 4 bolt mains ur using. an exhange program may be a solution? yeh that's something i'm considering. Provide a bottom end with atleast bearings in and clearances set. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4473854 Share on other sites More sharing options...
T04GTR Posted March 12, 2009 Share Posted March 12, 2009 yeah. last thing you need is a bloke 100000kms away slaging your shit after hes paid good money and the f**ker locks up when its all tensioned down.. shane.. so your countersunk holes are oval? what about when its tightened? wont it centre itself being a taper? Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4473974 Share on other sites More sharing options...
T04GTR Posted March 12, 2009 Share Posted March 12, 2009 what about using shallow cap screws in a slight elongation? getting them tight would be a issue but.. Link to comment https://www.sau.com.au/forums/topic/259282-gtr-rb30-sump-adaptor-plates/page/3/#findComment-4473981 Share on other sites More sharing options...
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