Using AEM with the NEO motor? Can it be done?

[meet07]

I need a new engine and was considering purchasing a neo RB25det since they have come down on the prices over the years. I already have the AEM EMS and read that you have to swap out the CAS disk.

-Has anyone ever used AEM on a NEO Engine?
-And if so how?
-Does the series 2 black top CAS work without the disk?
-Will the disk even work with the newer style black CAS?

[RRRRB]

Im guessing on the CAS but i would assume it would work.. as people have swaped them between series of motors during camshaft swaps.

I would adapt your current Rb25 harness and ignition coils onto the NEO motor..

What happened to your old motor?

[chad b.]

You didn't tell us what EMS you have. Series 1 or 2? The RB25DET EMS part number is 6620.

[mixeds14]

Its may work since ue changing the complete harness, the s1/s2 n neo have different ecu plug so u wold have to anyways. N u will have to change some wires on the cas also

[meet07]

I don't even want to get into what happened to my old motor.....

I mean I have the series 1 harness and ill be using all the series 1 sensors plus the IAT and MAP so I should be good in that department. I considered changing out the cams but with the NEO engine having solid lifters and the series 1 having hydraulic, I would think the clearance on both would be different. I was thinking in order to make the series 1 cas work with the series 2 neo cams, they would need some sort of machining....And if that's the case then I would just purchase another series 1

I called AEM about the series 2 black top CAS working with the 1st AEM EMS but they didn't have much to say. I have the AEM 30-1621U

[RRRRB]

R33 series 1and 2 Cam angle sensors will not work with R34 NEO cams, the drive on the CAS and the end of the cams are different from the R33.

Series 1 and 2 R33 engines interchange CAS R34 NEO is whats different. Also, a common misconception when looking at Tomei's camshaft application sheet... ask me how i know..lol

[meet07]

Checked on SAU and they say that the neo cams don't interchange with the S1 or S2 head....Looks like this is a no go unless someone can confirm that it works...

[mixeds14]

Huh. Did they mention why.. I wonder if they said that b/c of the cas n one having hydrolic vs solid lifters....

[meet07]

There still giving there opinions .......I found me a RB25 series 1 setup tonight ;-)

Guess I'm back in business lol

[RRRRB]

NEO cams don't interchange because they are meant for solid lifter vs the the R33 hydro's

[meet07]

Ok I have seen a few cars with a rb25 neo running aem. Trying to find out what was done to make run. Hope its nothing major

[Yellow4g63]

They prob just used a S1 cas with the Neo key? If I remember right you can use a punch tool to get the pin out of the key? Hope that makes some kinda sense?

[mixeds14]

The neo has the half moon key type vs the s1, s2 have the star like key.. but are u saying changing out the shaft on the cas it self..

[Yellow4g63]

Yes sir


If the neo's shaft is the same you could just punch the S1 key out and use the neo shaft?

[meet07]

Have u had both side by side and measured? Looks like it would work. The neo cas shaft looks a lot longer than the S1 cas.

[mixeds14]

I have a spare cas for my neo at home. I will take a pic tonight when I get of work along with a measuring tape on the shaft n post it.. I look for the pin n see if it has one also..

[mixeds14]

I believe the cas are different, here's the pic to my spare one..

[meet07]

I wonder if a local machenist can make it work? Making the neo cas end slide onto s1 cas shaft?

[Yellow4g63]

It could still be possible. If you look at my pic and the pic of the neo CAS they look the same length to the bearing. If it has those 2 screws like the mitsu unit then you can swap the whole shaft out. You would need to get the bearing off 1st tho and I remember it been a pain in the a** lol. I didn't mess it up because the car runs with the AEM CAS disc.

[outlaw7]

Idk if this would be easier or even a viable option but rawbrokerage just started selling a haltech P&P specifically for the NEO, roughly the same price, might just be easier, unless you already have the AEM.

[meet07]

Idk if this would be easier or even a viable option but rawbrokerage just started selling a haltech P&P specifically for the NEO, roughly the same price, might just be easier, unless you already have the AEM.

Yeah I have the aem ems

[Coolwhip]

We do now carry the NEO specific Haltech's: http://www.rawbrokerage.com/haltech-pla ... -ht055105/

[meet07]

Spoke with a guy on Facebook forum. Found out that a SR20 CAS AEM disk will work?!?!? If you look at the 2, they both kinda look the same. Might have a winner

SR20 cas:


RB25det GTT CAS: