RUNAMUCK Posted June 30, 2010 Share Posted June 30, 2010 Does anyone know what the casting numbers are on an RB25 head from an R32? I bought one off tardeme for an RB30 I'm going to slap together at some stage, but I wanna make sure what I have been sold an rb25 head, and not a shitty old RB20 head. Quote Link to comment Share on other sites More sharing options...
EvoBilly Posted June 30, 2010 Share Posted June 30, 2010 i don't know the casting numbers but you can tell if its a rb25 by measuring the diameter of combustion chamber rb20 is 78mm and the rb25 is 86mm Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted July 1, 2010 Author Share Posted July 1, 2010 Thanks mate! Thats what I needed to know. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted July 2, 2010 Author Share Posted July 2, 2010 just to add to this thread, I busted out the very-near calipers today, and had a measure up. Aaaaaaand, it was 86mm. So yay! I got what I paid for. Just gotta slap it on the RB30 I scored for free and do skids now. Oh, ftr, The casting numbers on it are; 08U 6 Quote Link to comment Share on other sites More sharing options...
Hemi Posted July 2, 2010 Share Posted July 2, 2010 damn beaten .. mean rb30's make me pants happy . Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted July 2, 2010 Author Share Posted July 2, 2010 And the shortblock was free, so it's double happy! Quote Link to comment Share on other sites More sharing options...
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