rb25det s1 and s2 block differences?

Discuss the RB20, RB25 and RB26 series engines.
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ricardo.benin
Posts: 19
Joined: Tue Dec 10, 2013 10:59 pm
Car: 1991 240sx

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Hi I have a bare block rb25det block and the guy I got it from said that the block is a s2 block is there any way for me to check if it is in fact a s2 block I can not seem to find any info. Also will a s1 rb25det cylinder head swap on a s2 block or the other way around.
Any help would be greatly appreciated.
Thanks
Richard

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Yellow4g63
Posts: 3718
Joined: Mon Jan 20, 2003 6:07 pm
Car: 95 Nissan RB20 240SX RB20
91 Nissan NX2000 VE power
95 Nissan 240SX Stock
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I'm no RB25DET expert but I'm sure the S1/S2 are the same block. The S2 didn't have a ignitor like the S1.
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ricardo.benin
Posts: 19
Joined: Tue Dec 10, 2013 10:59 pm
Car: 1991 240sx

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OK so I guess it does not matter what series head I put on.
Thanks
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