rb20de NEO head on rb20det???

[Kisorperformance]

found one for sale today, (head only) just wondering if anyone has swapped this head onto a standard 20det.... any benefits? what about sensors/ electronics??? is the intake cam advance mechanical or are they pcm controlled??

[Carl H]

no one stateside has swapped this head onto a det bottom end...it should bolt up in theroy but you'll need the ecu to control the cvtc...

[DrIft Ready]

F#%k the vtc the ports are huge.. putting cams in it anyway. get me the head and it will be on my rb in less then a month... also the nonturbo rb25 intakes are much better than the stock ones

[DrIft Ready]

im looking for that head too what the price u found it for....not forshure that it is a drict bolton but i know it will work....i found a rb20 neo for $900and yes u would need to run the neo ecu to have the vtc

[Kisorperformance]

ebay baby...... http://cgi.ebay.com/ebaymotors...ZWDVW

[Yellow4g63]

It's prob the guy I got my motor from. I was going to buy the Neo head but with Christmass right around the corner it's a no go. Then I also have 270cams in my head too lol.

[driftkidtt]

Have a few questions on this topic:

What are the mechanical differences between the NEO rb20DE head and the standard rb20det.....does the NEO have solid lifters and bigger valves?

what other advantages does the NEO have over standard...

[jdmser]

wouldn't you be able to run the stock ecu and a rpm switch for the vvl just like the ve swaps?

[devil_child]

in theory yeah i guess. there is an sr guy in town who just did it with an msd box.

[savman]

Sorry to dig this up from the dead...but google lead me here.

I'm wanting to put a RB20 NEO head on a RB20DET, just wondering if it easly fits up (vct aside). I'm building up an Engine for Targa Tasmania (tarmac rally that you probably han't heard of), and it seem cheaper/easier to put a NEO head on, than machine in solid lifters, port head....etc

Thanks

Ben

[Cjmartz2k]

All the RB20 Neo's were n/a and if the RB25 vs. 25 Neo motors are any indication, the bowl size is very different and you'd probably need to have custom pistons made to keep the CR in check. RB25 vs 25 Neo blocks are the same though, and same is probably true with the 20's, so I'd bet it'll bolt up just fine, VCT stuff aside.

[Yellow4g63]

Sorry to dig this up from the dead...but google lead me here.

I'm wanting to put a RB20 NEO head on a RB20DET, just wondering if it easly fits up (vct aside). I'm building up an Engine for Targa Tasmania (tarmac rally that you probably han't heard of), and it seem cheaper/easier to put a NEO head on, than machine in solid lifters, port head....etc

Thanks

Ben

You will need to block off the oil feed at the head. and tap a external feed and connect a oil feed to it.

[savman]

All the RB20 Neo's were n/a and if the RB25 vs. 25 Neo motors are any indication, the bowl size is very different and you'd probably need to have custom pistons made to keep the CR in check. RB25 vs 25 Neo blocks are the same though, and same is probably true with the 20's, so I'd bet it'll bolt up just fine, VCT stuff aside.

I don't see the CR being a problem. My mate runs a RB25DE+T, and all the CR changes come from the bottom end. Slightly higher CR would be nicer anyway.

So has anyone on here actually fitted a 20NEO head onto a 20DET? I'd seen a couple of threads floating the idea. In Theory it should work, as the as all RB25 head's fit onto RB25DET/RB30ET bottom ends (NEO's need vct blanked of corse). So you'd assume the RB20's would be the same.

Might just need to bite the bullet and find out.

[Cjmartz2k]

I'm just repeating what I've heard on skylinesaustralia.com, so take it for what it's worth, but according to them, it's not a little bit higher CR, it's a lot. Like 10.5:1+ kinda high.

[synergy]

Cj i dont belive it would change your CR judging by your own research. "Neo blocks and non neo blocks are the same." That would mean any difference in CR is due to the head not the block so any block (neo or not) with the NEO head would have the same CR.

Also if the blocks are the same and the displacement is also the exact same i would have to say that the CR would not change due to the heads volumes being the same. If the displacement is different by a few ccs or even more some simple math should get your final CR.

The biggest thing you would be worrying about is the additional functions of the neo head and the placement of the existing functions.

[Cjmartz2k]

Umm, no. Pistons are different neo to non-neo. Does that answer your doubts about what I said or you want me to get to typing?

[synergy]

well when you said blocks are the same i thought you meant rotating assembly.... Sorry thats just how i took it. grrr.

[Cjmartz2k]

The block is the same. They all have a "75T" cast into the side of them. The pistons have different shapes/pin heights which match the neo/non-neo head to get a 9:1 CR.

Now if I would have said a "short block" or "long block", I could understand your confusion.

[synergy]

no i totally understand. I know that alot of blocks are the same as it saves companys loads of money. And i know they use different pistons i was just trying to give this guy some ideas on how to figure it out. sorry cj.

[Cjmartz2k]

Gotcha. I saw the "Grrr." at the end of the last post and thought you were growling at me