difference between neo 6 and r33 rb25det

[scottsi]

why does it make more power? bigger turbo? are the internals the same? does it have VTC aswell,a nd how much more difficult, if any, is it to swap into a s13 chassis, the reason im asking this is because venus auto sells r33 rb25dets for the same price as neo6 rb25det's, if the neo6 isnt much more difficult, id probably ratehr do that swap.

[Shocker]

Basically the neo 6 uses a pull type clutch, so the 300sx n/a clutch will not work on the neo, it also has stronger internals. I considered this option once.. and well pull type clutches are not cheap, and aftermarket is even more scarce for the neo than a s1 or s2. Wiring is different as well.
Modified by Shocker at 9:37 PM 11/3/2005

[scottsi]

how much more difficult is the wiring, and how much stronger are the internals?

[eh?]

Neo's supposedly have rb26 rods as per the Nissan FAST. Head has solid lifter like the rb26. No word yet on the pistons, but they are def not r33 pistons (different p/n's) As for wiring, go to my forum and ask for red240zenki, he's the only person I know of that has done the neo wiring his self.

[cvc9216]

Can you use an R34 longblock with R33 manifolds and wiring?

[Shocker]

I dont know about that.. ive never heard of any body doing it, then again there are like very very very few ppl who have actually swapped the neo into an S chassis, it took Mickenny like 6 months to get Panges wiring done, I researched it for a while, and just got discouraged with the lack of information out about it. just my opionon tho. Do you plan on wiring it up yourself? id imagine that could be the trickest part, and getting aftermarket parts for it as well if anything craps out on you... If i were you i would get into direct contact with the few ppl who own a neo 6 and get their personal information on it.

[240sxed]

Oh yes, theres a lot of internal differences, it has a cool little valve cover cover, that says straight 6 neo. and the turbo is different, its not like the cheap r33 ones where the wheel flies off past 12psi =T

[PANGES]

I have a neo6 rb25 in my 89 fastback.. I did'nt do my wiring myself so I can't give you any help on that. Sorry Took Mckinney over a year to do mine, but they were great about it so I got no complaints. I dont know about the other RB25er's here too, but my 3" mckinney downpipe did'nt fit, it had to be shortened about an inch also.

[PANGES]

Also, I've run the car several times on 14psi and i took the turbo off and checked it out and it seemed ok still.

[red240zenki]

Wiring isnt really that hard at all. I did my wiring in an S14 and it almost the same as the R33. There are few extra things that you have to wire in. It's also fairly straight forward in an S14 chassis compared to an S13. I personally dont like the wiring the S13. If you have anymore questions send me an email, [email protected] or start a thread on eh?'s site. I'm on there more than Nico. I'm also in the process of taking my engine apart. So we will find out what the differences internally are between R33 and R34 pretty soon. The only thing I dont like about is on the R34 is the TCS (traction control). It just adds to the wiring.

[PANGES]

I'm most likely going to be taking my RB apart around January too.

red240zenki: let me know how your tear down goes

[red240zenki]

Why are rebuilding your engine? I spun a rod bearing. Lack of oil pressure and high RPM's.

[Kansei240sx]

The thing i've heard about the NEO 6's and the difference between regular rb25det is, well on the RB25DET head, its got VTC which retards or advances the intake came, so variablly timed cam.

Neo 6's use variable valve and lift, in thier heads, which makes up for more of the power plus i've heard the compressions are different.

Now about the wheel flying off after 12 psi.... that would be a ceramic wheel turbine like on the RB20DET and the turbo that came on my SII RB25DET has a steel wheel and is a ball bearing unit GT28 turbine which can be boosted safely to 15 psi.

[eh?]

The thing i've heard about the NEO 6's and the difference between regular rb25det is, well on the RB25DET head, its got VTC which retards or advances the intake came, so variablly timed cam.

Neo 6's use variable valve and lift, in thier heads, which makes up for more of the power plus i've heard the compressions are different.

That's incorrect.The r33 rb25det has a single stage VTC soleniod. it's on around 1100 rpm and off at ~5500. The r34 has infintely variable vtc where it's advanced through out the rpm range.Also no RB has VVL. Neo doesn't mean VVL.

[Kansei240sx]

Ok, thanks for clearing that up, i knew the RB25 from the R33 has VTC on the intake cam, i just wasnt dead sure on the R34 RB25DET becuase thats what i've heard, i wasnt stating it for fact.