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Rb25de Neo Head Differences


R30gtN/A
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Hey people I just thought I would post this up to show you and to get your thoughts on using a Neo head for a RB30DET? here are some photos to show the differences between R33 early 25DE and Neo 25DE heads. And maybe this could help update the PDF?

Neo head with a R33 25DE head gasket sitting on

Neo25DEheadwithR3325DEheadgasket.jpg

Neo head with R33 25DE intake gasket on it

Neo25DEheadwithR3325DEintakegastket.jpg

Neo intake with R33 25DE intake gasket on

Neo25DEintakewithR3325DEgasket.jpg

Neo piston

Neo25DEpiston.jpg

R33 25DE head with Neo intake gasket on

25DER33headwithneo25DEintakegasketo.jpg

Neo chamber

Neo25DE.jpg

R33 25DE chamber

R3325DE.jpg

Both manifolds side by side

differencebetweenneoandr3325DEmanif.jpg

Edited by R30gtN/A
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Yea I was thinking the same thing, im just thinking of making a thrasher or a n/a RB30DE or something as its not for my car as I allready have a RB30DET built. So does anyone know if the turbo heads are different?

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  • 2 weeks later...

I wonder if the N/A neo head can be extensively ported to the turbo spec? ie if they are the same casting, one with smaller ports.

Only ask because i have a na neo head that i was going to use but i didnt expect that the ports would be different. I thought nissan kept everything the bloody same, at least they did with the r33 heads..

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  • 3 weeks later...
  • 5 years later...
  • 6 years later...
  • 9 months later...

Yeah all the same(ish) block, there are differences between turbo and non turbo blocks but only for oil feed and drain for the turbo and same for water.

 

Yes you can put a Neo DET head on a Neo 25DE block so long as you sort out the issues mentioned above.

Im doing the same thing right now.

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