RB20DET and RB25DET help

Discuss the RB20, RB25 and RB26 series engines.
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nickgarthright
Posts: 7
Joined: Sat Aug 29, 2015 10:18 pm
Car: 1978 280z with RB20DET

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Hi, I was wondering if anyone had a spare or their rb20det or rb25det intake manifold off because I was wanting to design an adapter plate to allow the rb25 intake to be mounted because there seems to be a lot more affordable rb25 front mount manifolds. Also I live in Arizona so I'd just like to stop by get some measurements and be on my way lol. Thank you for checking this out!

Nick
[email protected]

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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
Contact:
Contact Yellow4g63

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You could order a gasket. Cometics sells intake manifold gaskets for the RB20 and 25 if that helps.
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nickgarthright
Posts: 7
Joined: Sat Aug 29, 2015 10:18 pm
Car: 1978 280z with RB20DET

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Thanks, that is a great idea but my dreams of mating a 25 intake to the 20 just got squashed because the injector size is different...
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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
Contact:
Contact Yellow4g63

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type is different too. RB20/RB26 uses top feed injectors while the RB25 uses sidefeed like the sr20's.
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