R33 Rb30 Conversion

[Guilt-Toy]

Has anyone blown up their RB30DET yet or know anyone who has broken one for whatever reasons ?

[RIPS]

Only failier I know of is a guy who built his own motor, constantly over reved it and ran it lean, threw a rod.

[SmItLeR]

yeh - revving would be the only downside to these engines... what would be recommended as a general rev limit - 7000rpm ?

cheers

BRAD

[Fitzpatrick Speed Works]

7500 is cool but 7 would be even more safe!!!

[Jaws]

7500 is cool but 7 would be even more safe!!!

It's been said before that you don't need to rev it to make power.

I'm using a 25head with a GT35R (.82 housing)rated at 700 hp. The power is expected to drop around the 6400-6800 rpm mark so revving it past 7k is pointless.

[lwells]

Does anyone have weights for the RB25/26 bottom end compared to the RB30?

LW.

[Fitzpatrick Speed Works]

yes i would agree that with a 25 head with stock cams it will start to drop power past those revs casue a stock 25 is only setup to rev to 7 in the factory so the cams will be optimisesd for up to this region, the ability for an engine to make revs in the top end is all down to breathing and the cam specs have a lot to do with this!!!!! there is no point reving it if your making no power but as this wasnt stated i gave a rough indicatory remark to ehat the engine is capable of reving to!!!

[Sydneykid]

Does anyone have weights for the RB25/26 bottom end compared to the RB30?

LW.

Which weights?

[lwells]

Which weights?

Hi SK,

Not quite sure what you mean. I was basically just wondering how a complete RB30DET/T compares to a complete RB25DET/26DETT in terms of weight/mass.

Cheers,

Lucien.

[YO880]

Hi Guys,

quick question.. i am looking for a turbo for an RB30DE with RB25DE head (conversion is in progress)

would a T04 turbo be okay? i am looking for around 250rwkw

I found this one on ebay, would it be suitable? http://cgi.ebay.com.au/ws/eBayISAPI.dll?Vi...=ADME:B:DS:AU:6

Thanks guys, brilliant thread, fingers crossed i get through this conversion (which is step 1, step 2 is getting it into our Datsun 240K )

[discopotato03]

Joel , have enquired about the Power FC and was told the following . Price varies from $1200 - $1500 depending on the application . The RB20DET R32 version is not common and more expensive as not many were made . I understand that you used one and mat may have one for sale . can you breifly tell me of your experiences with it . Please excuse typo's as my delete key is stuffed .

Thanks joel and all A .

[Sydneykid]

Joel , have enquired about the Power FC and was told the following . Price varies from $1200 - $1500 depending on the application . The RB20DET R32 version is not common and more expensive as not many were made . I understand that you used one and mat may have one for sale . can you breifly tell me of your experiences with it . Please excuse typo's as my delete key is stuffed .  

Thanks joel and all  A .

I have an R32 GTST Power FC, had it for over 3 years, used the Commander for the first year and a half to tune it and a Datalogit for the last few months. It was on the RB20DET for the first year or so (ended up at 225 rwkw) then we put the RB30DET in it (RB30E bottom end with RB26 top end) and it handles the 400+rwkw just fine. Our race team dyno tuner had never seen a Power FC before, reckoned it wouldn't be as good as the Motec's we usually use. Now he is converted, mostly because they are so easy, they work straight out of the box, all the tricky stuff is done. Plug it in (5 minutes) and onto the dyno, where he just has to tune it for power. The Datalogit is worth it if you do lots of tuning, then more mods, then more tuning etc. I find the Commander very handy, replaces quite a few gauges and great for diagnostics.

I didn't worry about how much the R32 GTST Power FC cost, because I knew I could get my money if I ever sold it. They don't loose much, cause they are rare. With the Commander it cost me $1,400, I reckon I will get that back, so it only costs me bank interest to keep the PFC, that's $1400 X 4.99% = $1.35 per week.

I reckon that's a bargain.

[discopotato03]

Question for SK , can R32/33 GTR six throttle inlet system be fitted to R32 RB25DE head . Is the difference it makes worth the $1000 for a road car . Can it be made to work with RB20DET loom and sensors or the R33 single turbo loom and sensors .

Thanks A .

[discopotato03]

SK thanks for the above reply , do you know where I could buy one in Sydney . You've also answered another question - can it run the GTR inlet system . Was there any mixing and matching of sensors ?

Thanks again Adrian .

[Sydneykid]

Question for SK , can R32/33 GTR six throttle inlet system be fitted to R32 RB25DE head . Is the difference it makes worth the $1000 for a road car . Can it be made to work with RB20DET loom and sensors or the R33 single turbo loom and sensors .

Thanks  A .

No, bolt pattern is different, water jackets in different places. I have answered this question so many times, it's like Groundhog Day. Nissan didn't want people sticking RB26 stuff on RB25's, so they made it as hard as they could. They wanted to sell GTR's after all.

[Sydneykid]

SK thanks for the above reply , do you know where I could buy one in Sydney . You've also answered another question - can it run the GTR inlet system . Was there any mixing and matching of sensors ?

Thanks again  Adrian .

I bought my PFC off the forum. I used ALL of the R32 GTST sensors and the R32 GTST wiring harness. I carefully removed them, one by one, off the RB20DET and put them onto the RB30DET, that way I knew everything worked. The only thing I changed was the AFM, we used a Q45 AFM, the RB20/25 AFM wouldn't handle the airflow. The RB20DET already had 565 cc injectors, they went straight into the GTR fuel rail and inlet manifold. I just upped the fuel pressure with a Nismo adj FPR, the Bosch 044 handles it easily. I even used the RB20DET ignitor and coils.

I put the old RB20DET back in a while back while we built a new RB31DET, which is just about ready to go in. (Similar max power, but higher average power). I will follow the same simple rules, use EVERYTHING (from the RB20DET) that plugged into the standard wiring harness. Change as little as is absolutely necessary.

Hope that answered your questions

[Cubes]

Or alternatively you could purchase an AP PowerFC from Nengun or Greenline and have it landed in AUS for some where around $1500.

[predator]

yes, I have noticed this too joel actually it'll be $1200.. they don't impose any taxes on ECU's ..

[Cubes]

Depends if you want the hand controller

[drunkenmaster]

On another topic, does anybody have an opinion on what diff ratio would be ideal for the RB30 due to the increased torque?