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Rb30 Block Modifications

felixy69

By felixy69,
in Engines & Forced Induction

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Dobz Experienced

Dobz

Posted
Posted (edited)

rb26 main crank journals are 2mm smaller on diameter compared to rb30 so it's anyones guess how you fit rb26 bearings in there. You don't need to do any special trickery to make rb30 blocks hold big hp except get it built properly with quality parts and a good tune.

Edited by Dobz
Gerg_R31 Mentor

Gerg_R31

Posted
Posted

all rb series have the same main journals, the main journals vary

to make a rb30 bottom end reliable

ARP main stud kit

H beam rods (usually the good ones come with ARP bolts)

Balance and weight match all conrods (some call it blue printing)

other then that they are pretty strong

rb30 cranks already have been nitrided from factory, which the hardness coating is 0.010" thick if you do a 10/10 main and big end grind advised to have it re nitrided

if your running nitro or methanol or both get the piston skirts "tough coated"

mawzy Enthusiast

mawzy

Posted
Posted

Just another question to add to this, but is it worth deburring/polish the inside of the block? Like Tidy up all the casting marks etc? or is this a waste of time? I have been told it helps oil to settle in the sump quiker. Same with oil return from head, and in round the oil filter feed.

rockabilly Rising Star

rockabilly

Posted
Posted (edited)

felix, just build it mate, lol

mine is a std block not painted, spool rods, cp,s,cometic h/g arp,s acl race bearings, done 3000miles on the motor since it sucked something in and did no5 big end, of that 3000 miles over 1000 miles are on track, i ran it in for 40 miles on mineral oil then it did 8 hours on the dyno and then i took it to zolder/spa and the ring all in one weekend.. mine makes 640bhp/556lbs @ all 4 on 1.5 bar..go for it..

Edited by rockabilly
STATUS Grand Master

STATUS

Posted
Posted
according to spoolup

they paint the inside with some kind of smooth paint so that the oil slips down faster.....worth looking into !

old v8 trick from the 70's

class F red insulating paint, its great until it peels, but peeling is not overly common. Commercial Diesel's have come factory with this coating for decades.

heres the gear (aussie dealer) if anyone wants to use it:

http://www.ppcco.com.au/fact_sheets/pi/pi_glyptal.pdf

N1GTR Grand Master

N1GTR

Posted
Posted

But yeah felix there are many threads on here with all info needed.

Don't overthink, quality parts and screw together-easy as

A good thread to read is MarkOs one, he went from 2.6 to 3.0 and basically kept a running journal as he went

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