vladKraft

Its a problem I found him only offline through friends in laurel club, who participate in russian nismo club in another city, he selled car, dont want to say how it built, who buyed it and also behave like asshole. Tried to get drawings or photos of adapter plate and some more explanations, but no results. https://habarovsk.drom.ru/nissan/skyline_gt-r/36376520.html thats only link that i have

Found a project of build rd28 block rb, but owner dont go on contact. This is translated spec: -Based on rd28 block, RD28 crank with spline drive gears JUN oil pump, forged conrods from golf with machining. -Tomei 88 pistons. -Custom adapter plate for head, 2 external oil drains. -Headgasket Cometic, 1.5мм. Oil sump from rb. -Restrictors in head. Camshafts GREX 264, lift 9.15. -Balanced all crank mechanism. -Crank bearings ACL, Conrod bearings RD28 stock. -Compression ratio (measured) 9.15. Engine capacity 3027CC. Really want to know about his adapter plate. In fact there are a lot of rd blocks found used in drag race with concrete filled galleries.

-in cases of my friends they noticed 20/25 block difference, because they`re want to find difference if you drive interesting car. For what? For make plan of catched, or just bribery -yeah, troubles with measurements i found -interesting, but 45mm journal can make crank weaker, for long engines it`s problem. I think it can be usable in what i want to do(N/A) and also get more stroke, need to make calculations, because 3.4 liters rb strokers already exists, so i think it can fit in block

Hi, really interested, in Russia(sorry for my english) there is no rb30 at all, may be 30 in all country, of course not for sale. Also a problem with swap, because if i swap rb30 and engine got checked i lose registration. So i want to say a little words about ability of conversion. Some measurements: (rd28/rb30) block height same, stroke 83/85, piston compression height 46.5/32.5, conrod length 140/152.5(6 inches), bore 85/86, diam of crankpin 50/48, bottom width of conrod 24.77/21.8. Head bolt holes are in the same spots. No problem to grind down rd28 crankpin to get 85 stroke(and it also make crankpin diam same as rb30), but there is problem in conrod width, but exists technology to fix heavy duty cranks with plasma spraying, its hard, but posible to get all rb30 sizes on rd crank to fit conrods. About another variants of stroke and rod length dont checked, want to build n/a rb30de, with my calculations using stock rb25det pistons and head i`m get near 11,5 compression. Also about heads, they have different oil drain and some little differences in coolant galleries, this oil drains is the biggest problem of this conversion because cast iron is really hard to weld with saving durability, its unloaded part but can have some issues. Another way is to weld new oil drains to head and connect it to sump with hoses, this variant is much more easier, but now headgasket is problem. In conclusion, need to weld block surface to fit rb head(hardest part), need to plasma spray and grind down crank to fit rb30 conrods, for example maxpeedingrods, they are affordable(700$ for set) and easier to find