Jump to content
SAU Community

Recommended Posts

i just read somewhere the neo6 uses variable valve tech

why doesnt the rb? wouldnt it help dramatically with low rpm/cruise fuel consumption and high end open throttle power?

does have 2 turbos make it obsolete? wuldnt u get even more power?

if so, is it possible to adapt the vvt from the neo to the rb engine?

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/
Share on other sites

The R34 GTR's RB26DETT has VVT from my understanding.

Don't forget, the older generation RB26's are designed way back in the 80's with the R33 GTR's engine being more a improved version only, not a complete overhaul.

You may be able to but that would mean use the neo's head and changing ecu's. Not sure though.

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/#findComment-1071796
Share on other sites

the power output of the RB25DET neo and the RB26DETT might be the same on the nissan brochure but in real life they are quite different.

The RB26DETT revs higher and puts out 50Nm more torque. The stock power figure is probably closer to 250kw. Fujitsubo claim about 247kw for a stock BNR34 on their exhaust website.

I offer to put mine on any 4 wheel dyno. I dont know where the nearest one is.

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/#findComment-1072004
Share on other sites

is that figure at the flywheel??

It would be expected that the NEO wouldnt match the RB26 but it seems that the factory figures (obviosly changed for the jap power laws) are extremely inaccurate. Also comparing RW figures on the NEO and RB26 would be difficult as the cars run with differnet drive setups.

Sewid, if your gonna put your car on the dyno, could you disconnect the front driveshaft :D

I want to know what the power difference 4WD and RWD is with the same engine

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/#findComment-1072009
Share on other sites

Yeah both power figures are innacurate - the NEO probably makes more than 206kw as well. There was a gentlemans agreement between manufacturers in the 90s that limited power output to 280ps (206kw). This is why cars kept coming out faster and faster and with more and more torque but still had 206kw.

Figures are at the flywheel.

If i could find a 4wd dyno I would not remove the drive shafts as I never really plan on leaving the car like that so am not personally interested in its RWKW figure. Bit of a hassle and im too lazy is the real reason though :D

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/#findComment-1072013
Share on other sites

Isn't 206kw the limit for the gentlemen's agreement?

I don't believe that the RB26DETT has 206kw stock at all like sewid says it has more in stock form and I don't think any RB26DETT has VVT (NVCS - Nissan Variable Valve

Timing Control System) at all.

http://www.tomei-p.co.jp/_2003web-catalogu...haft-specs.html

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/#findComment-1072014
Share on other sites

any of you guys read wheels about a year ago when they compared an N1 R34 GTR with a Monaro GTS?

They put the GTR on a 4WD dyno and came up with 215kw at all 4 wheels. this equates to 300+ kw at the flywheel. Tho this is the N1 with bigger turbos and more boost, im guessing the figure of 250 kw for the normal GTR R34 would be about right.

I read that the japanese 206kw agreement is off due to other manufacturers (international) making cars with much more than this and they want to be able to keep up.

Link to comment
https://www.sau.com.au/forums/topic/54818-rb26dett-vs-neo6/#findComment-1072126
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Surely somebody has one in VIC. Have you asked at any shops?  Is this the yearly inspection or did you get a canary?
    • This is where I share pain with you, @Duncan. The move to change so many cooling system pieces to plastic is a killer! Plastic end tanks and a few plastic hose flanges on my car's fail after so little time.  Curious about the need for a bigger rad, is that just for long sessions in the summer or because the car generally needs more cooling?
    • So, that is it! It is a pretty expensive process with the ATF costing 50-100 per 5 litres, and a mechanic will probably charge plenty because they don't want to do it. Still, considering how dirty my fluid was at 120,000klm I think it would be worth doing more like every 80,000 to keep the trans happy, they are very expensive to replace. The job is not that hard if you have the specialist tools so you can save a bit of money and do it yourself!
    • OK, onto filling. So I don't really have any pics, but will describe the process as best I can. The USDM workshop manual also covers it from TM-285 onwards. First, make sure the drain plug (17mm) is snug. Not too tight yet because it is coming off again. Note it does have a copper washer that you could replace or anneal (heat up with a blow torch) to seal nicely. Remove the fill plug, which has an inhex (I think it was 6mm but didn't check). Then, screw in the fill fitting, making sure it has a suitable o-ring (mine came without but I think it is meant to be supplied). It is important that you only screw it in hand tight. I didn't get a good pic of it, but the fill plug leads to a tube about 70mm long inside the transmission. This sets the factory level for fluid in the trans (above the join line for the pan!) and will take about 3l to fill. You then need to connect your fluid pump to the fitting via a hose, and pump in whatever amount of fluid you removed (maybe 3 litres, in my case 7 litres). If you put in more than 3l, it will spill out when you remove the fitting, so do quickly and with a drain pan underneath. Once you have pumped in the required amount of clean ATF, you start the engine and run it for 3 minutes to let the fluid circulate. Don't run it longer and if possible check the fluid temp is under 40oC (Ecutek shows Auto Trans Fluid temp now, or you could use an infrared temp gun on the bottom of the pan). The manual stresses the bit about fluid temperature because it expands when hot an might result in an underfil. So from here, the factory manual says to do the "spill and fill" again, and I did. That is, put an oil pan under the drain plug and undo it with a 17mm spanner, then watch your expensive fluid fall back out again, you should get about 3 litres.  Then, put the drain plug back in, pump 3 litres back in through the fill plug with the fitting and pump, disconnect the fill fitting and replace the fill plug, start the car and run for another 3 minutes (making sure the temp is still under 40oC). The manual then asks for a 3rd "spill and fill" just like above. I also did that and so had put 13l in by now.  This time they want you to keep the engine running and run the transmission through R and D (I hope the wheels are still off the ground!) for a while, and allow the trans temp to get to 40oC, then engine off. Finally, back under the car and undo the fill plug to let the overfill drain out; it will stop running when fluid is at the top of the levelling tube. According to the factory, that is job done! Post that, I reconnected the fill fitting and pumped in an extra 0.5l. AMS says 1.5l overfill is safe, but I started with less to see how it goes, I will add another 1.0 litres later if I'm still not happy with the hot shifts.
    • OK, so regardless of whether you did Step 1 - Spill Step 2 - Trans pan removal Step 3 - TCM removal we are on to the clean and refill. First, have a good look at the oil pan. While you might see dirty oil and some carbony build up (I did), what you don't want to see is any metal particles on the magnets, or sparkles in the oil (thankfully not). Give it all a good clean, particularly the magnets, and put the new gasket on if you have one (or, just cross your fingers) Replacement of the Valve body (if you removed it) is the "reverse of assembly". Thread the electrical socket back up through the trans case, hold the valve body up and put in the bolts you removed, with the correct lengths in the correct locations Torque for the bolts in 8Nm only so I hope you have that torque wrench handy (it feels really loose). Plug the output speed sensor back in and clip the wiring into the 2 clips, replace the spring clip on the TCM socket and plug it back into the car loom. For the pan, the workshop manual states the following order: Again, the torque is 8Nm only.
×
×
  • Create New...