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3 V  < 1 2 3  
> Rd28 -> Rb28det(t), RD28 26 RB28DETT
V
Exhaust
26.3.2009, 9:13
#41


?)


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Exhaust - 26.3.2009, 9:14


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"hey is this an sr20?"
"No, ca18.."
"oh CAA? Nice."
 
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dimas76
26.3.2009, 10:57
#42





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Exhaust
26.3.2009, 11:10
#43


?)


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RB30E


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"hey is this an sr20?"
"No, ca18.."
"oh CAA? Nice."
 
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dimas76
26.3.2009, 12:20
#44





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Short block . , , . . .


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+7 965 381 7912
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Exhaust
26.3.2009, 20:26
#45


?)


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"hey is this an sr20?"
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"oh CAA? Nice."
 
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tailor
27.3.2009, 17:11
#46


ck t scL! LD scHL wait...


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(Exhaust @ 26.3.2009, 6:13) *
... 2500 - 3 000 $ ...


?,... ...
2JZ ...


--------------------
6:57 1996. CNR33
[sale ]
tailor79()mail.ru
89168511248
 
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Exhaust
27.3.2009, 21:15
#47


?)


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"hey is this an sr20?"
"No, ca18.."
"oh CAA? Nice."
 
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k325ko
31.3.2009, 18:17
#48





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PSYHO
10.6.2016, 10:05
#49





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3.4L RD28 RB26
http://www.calaisturbo.com.au/showthread.php?t=277465
 
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15.6.2016, 8:41
#50





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RB30
 
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Ex1rcist
18.6.2016, 13:35
#51





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21.6.2016, 7:47
#52





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GTR .
 
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sparks
21.6.2016, 14:52
#53





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GTR .

?)


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Dunnlop
7.4.2018, 2:34
#54





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(dimas76 @ 16.1.2009, 10:16) *
.

RD28. , .
RB , , RD 25 26 .

85
83

, , , , , .

, . ().

34 28 .


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- , - .
 
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-=NeWT=-
10.4.2018, 21:42
#55





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olzlo
11.4.2018, 8:20
#56


BORODA FACTORY


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/DBD/
14.4.2018, 20:45
#57





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(olzlo @ 11.4.2018, 8:20) *
? 28 , , , , , , .


, , smile.gif
 
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olzlo
16.4.2018, 7:28
#58


BORODA FACTORY


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conversion rd28 into rb28 ,
 
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igorexanein
5.6.2018, 6:18
#59





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(olzlo @ 16.4.2018, 14:28) *
conversion rd28 into rb28 ,

, , ,
 
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frakzz
25.9.2018, 15:28
#60





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- 28 ? )


I bought an RD28 crank a few months ago too and can confirm what you've said about the dimensions.

There are two possabilities that would work with modifying the crank to fit an RB26 block that I came up with.

Option 1.... De-stroke the crank to 81-81.2mm while re-sizing the crankshaft rod journels to 48mm (from 50mm). Use RB26 rods (optionally with GTiR 19mm bearings, but with an undersize bearing to allow for more offset grind.. closer to 81mm).

Custom pistons with a 10cc dome, profiled to suit an RB26 and with a 27mm compression height would be used. This would give a positive deck of around 0.65mm, which you would combat with thicker head gasket, minimum 1.6mm to provide a 9:1 compresison ratio.

The pistons would also be designed to guide the rods, so the gudgens are shimmed to support the conrod small end side clearance of about 8-12 thou.

Rod ratio would be 1.5 which would limit your maximum safe rev limit by piston speed to about 8000 rpm. Provided its all balanced very nicely that is, and you have the supporting mods to suit.

Add a pair of 2860-5's and rev to a maximum of 8000 rpm and you'd have a very responsive 2850-2890cc engine. (86.5 or 87mm bores)

Option 2.... Basically as above, but using RB20 rods to allow a further decrease in the crankshaft stroke. 79-80mm is more possible then, and that in turn allows you some variation with the choice of other components.

Either allowing a 0 thou deck or use of more common 28mm compression height pistons, eg: HKS step 2 RB28 pistons. The 14cc dome profile would increase the compression a little to ofset the stroke decrease, and you could always use that to help optimse for running E85 fuel too.

Destroking the crankshaft to using a 45mm rod journel doesnt weaken the crankshaft as much as you might think, as the material overlap area between the mains and big ends is retained in a de-stroke. You would also reduce the rotating diameter of the crankshaft to be about 3mm above the rod journel, and consider knife edging it while your at it to reduce the rotating mass a little.

frakzz - 25.9.2018, 15:28


--------------------
2011: rb25det neo stock 280hp
2012: rb25det neo boostUP 350hp
2013: rb25det single garrett 3076 450hp
2015: rb26dett twin turbo hks 2510 550hp (1.8b)
2017: rb26dett twin turbo hks 2530 (GTX2860R mod)) 560hp (1.3b)
2018: rb26dett single GTX3582R 550hp (1.1b), 714hp (1.8b)
ER34 rb26dett
rb26 GTX2860R, HKS rb26, CAS, RS-R
 
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