Yes it does say 8,000 rpm. I dont know what to tell you, except I have seen it. I guess my engine is modified. By the looks of the engine if it is modified it is all internal. I do not have the e-mail of the walk-around anymore. I dont usually save emails more than a month. I will send a request for the video and forward it to you.

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RB-Z31 RB30DET project. 400whp SS # 981 DD

That's a good looking engine. Take those pieces and clean them very well and powdercoat what you can. Since the RB25 is a rare swap of sorts, you need to make your car a flagship for the conversion. Make it clean and take your time and make sure you pay attention to what you're doing, cuz 10,000 newbies are going to Email you asking every little detail about the swap :)

There has been one other person that had this swap done, that is confirmed to be done and running. His name is Dramier Role from texas. He had a shop named Augusta Customs do the swap for him. I am trying to get ahold of him for more information, however he is very busy with school.

I am going to tackle this swap myself. I am sure it will be a challenge.

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RB-Z31 RB30DET project. 400whp SS # 981 DD

Here is a link to Dramiers car pics.

[forums.hybridz.org]

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RB-Z31 RB30DET project. 400whp SS # 981 DD

what happens on a miata does not apply here.

the OE knock sensor is 1) inaccurate and 20 year old technology and 2) does not yield more HP as it is a sensor that is largely ignored.

you cannot make the association of doubling the displacement = double the HP. in that instance a 8.3l V10 viper engine would be producing 1200hp.

Sorry red I forgot you know everything.

Once again you show your ignorance about engine tuning. A knock sensor is vital to engine tuning if you want to run different grades of gasoline. It is also vital for tuning if you change the injectors. That is why most people have thier pcm's re-flashed.

Here in Mi there is 110 octane available at the pumps. If you want to tune for 110 vs. 91 you will need a knock sensor. In Mi we have a lot of choices for fuel 86,87,89,91,92,93,94 and 110(depending on the gas station). I think in Az there are only a few choices 86,87,89 and 91. I think the highest you can get is 106 if you are lucky. I am sure you will correct me if I am wrong.

Who cares if a knock sensor is 20 year old technology. The internal combustion engine is over a century old technology in that. Who uses them anymore? Also I am sure most of the Z's on here still use a MAF? Why use it when you can use a MAP sensor.

You made the association of double the hp. I did not double the hp for a 3 liter, 50x2=100 not 75. I also did not double the displacement 1.6lx2=3.2l. Now I said that you could make about 75 hp less without the knock sensor with a 3.2l vs. with a knock sensor.

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RB-Z31 RB30DET project. 400whp SS # 981 DD

On the z31, all the OEM Detonation sensor does is pull a few degrees of timing when it senses some knocking. And suprisingly the ECU ignores the Detonation sensor when in boost...it's pretty much worthless...

"slave master and pedals 300"

"boost conroller 5-500"

WTf?^^

I think your thinking a bit expensive there. A new clutch master is like $30, and you could definetly get the brake and clutch pedals from someone parting their car out for ~$50 I'm sure.

Also $500 for a boost controller? I guess if you're looking for top of the line. But to get the performance, you're not going to need to spend that much.

$800 for an intercooler? Um...I don't think so. I think you can pretty much cut that cost in half if you're going to be making your own piping.


Good luck with the swap though...it looks nice and it's refreshing to have someone try something (relatively) original!!

I can thrash my friends 200ZR with an RB20DET with some big ass R33 turbo, in my pretty much bone stock VG30ET. It's ok for something different but the VG is better imho :)

I have gotten a a few quotes for the peday assy. all of which are 90 including shipping. But I will also need the line from the master to the slave, the slave and the master. That is if I were to go the VG route. As I am not doing. I already have the parts needed for my RB trans.

OK so the ecu ignores the knock sensor during boost. But in tuning you can pull more hp out of the engine with it rather than without it. That is my main reason for saying I needed it.

On the boost sensor aspect, anyone can spend 5 to 500, that is why I went with the median number. However I do not need a boost controller as one is built into my PCM. Another reason as to why no VG.

I was using Red's quote of 800 not mine. I already have mine its a greddy from a s13. It cost me 300 used.

Thanks,

I am sure it will be a lot of work and headaches.

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RB-Z31 RB30DET project. 400whp SS # 981 DD

85zx where are you located at? Just wondering if there are any legal 200ZR's in the US?

I have heard that the 200ZR's and 300ZR's are sloths, but never been in either.

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RB-Z31 RB30DET project. 400whp SS # 981 DD

So what would be a better engine to put into the 85-89 300zx? Vg30det or rb25? Let me know and send me some link to where i can buy this type of engine. Thanks.

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88 300zx T-Top 3.0L V6
Original White, Power Everything, Leather, Electronic gauges,
Nissan S-Tune Badge, and more.

no, im not showing my ignorance, and i'm not saying I know everything, im providing you with useful information so you dont waste time or money. I'm sorry you think I'm an ass and am wasting your time. I dont know what your history is in engine tuning, but I understand bosch systems pretty damn well.

Look at the bosh system again

racinjitter, Australia here... Everything we get is JDM pretty much, the 200ZR is a very sexy car no doubt but after all it has a Skyline motor :P

I guess it depends on your situation. My VG engine is in very poor condition. I got a good deal on my RB so I took it. Red and Zbum would definately steer you to a VG30ET. I admit this is a stout engine. You can make good power with a VG. I would say if you have the skill to do a swap, hell why not? The RB can produce 500whp reliably on stock internals. Red or Z bum should be able to tell you what the VG internals can hold. But I believe that it can hold about 400 hp. There is a link posted by me for the company I went through out of Quebec earlier in this post. [www.sunrisejapanese.com] They are very friendly and definately honest. They carry more engines than they list. Just call their 800 number. He is french canadian so I hope you can understand broken english.

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RB-Z31 RB30DET project. 400whp SS # 981 DD

are you 100% sure that the 25 is forged? I've commonly heard 350ish whp max out of the stock engine.



Post Edited (Mar 26, 7:55am)

100% sure. I have seen a stock internal 25 do 580whp. Just turbo, fuel and tuning. The customer spent about 7k on everything including the car. If a RB20DET can put out about 400hp on stock internals, with a half a liter more and newer technology. 580 is realistic.

You are trying to steer me back to a VG, I have already bought a RB. I dont mind saving money. Time is no issue though.

I thought you would have more to say about engine tuning, thats all. I know my stuff when it comes to engine tuning. I was on the U293, U364, U377 projects for 2 years(Ford escape hybrid, and mariner hybrid model years 2005-2008). I spent plenty of time tuning in Yucca, Az at the proving grounds.

We used some bosch systems for our ME coolant pumps. I cant believe the problems that arose in 2002-2004 in testing with these parts. I was not around during these times, however I dealt with the codes database in which all diagnostics are run through. Thankfully bosch fixed the problems and havent had a problem since. Are you familiar with this system?

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RB-Z31 RB30DET project. 400whp SS # 981 DD

Ken pushed 450rwhp on stock internals with his VG30. I know others have hit similar numbers.

I had heard the RB25 is far inferior to the RB26 and only slightly superior to the RB20. But that's coming from the 240SX guys. And that was also when the rb25 was still just slightly less $$$ than the rb26. From my understandings of the engines, the RB25 is only a slightly updated version of the RB20. No huge design changes.

What they are capable of is mostly going to be based on how well you build it.

Obviously, the RB's straight 6 will rev smoother and higher than the VG. No denying that.

As far as what's the motor with the most potential? Well, the old adage still stands. There is no replacement for displacement. If I had to choose one motor over another, I'd pick the VG33. But the RB26 would be a very close second. Followed by the VG30, RB25, and RB20 (in that order).

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Disclaimer:
I'm not really an ass. I just play one on the internet.

My Website
The Z/SX Registry

no, im not trying to convert you. I dont care what you do. im just discussing. from what it sounds you have far more experience then I do with professional tuning. I am not familiar with the cooling system you are mentioning.

Zbum what about the RB30, SR's, VQ's, VH's and KA's? I know there is a ton of aftermarket for all except for the VH's so far. I know I left out the CA's they are under 2.0L though. I am pretty sure no one wants to put an L series in thier car aslo. The VH's are the largest displacement at 4.5L and 5.6L. I believe that this discussion would be better in the [www.hybridz.org] forums. I am sure there is more expertise there.

But anyhow Zdrift anything is possibly with enough money. You need to weigh out the pros and cons and decide for yourself. As you can see it will depend on what you want to do. Anything besides the VG engines will need some type of fabrication and a lot of time. Even with the VG's you may need some (but not serious) fabrication. Here is a nice discussion about your VG's [forums.hybridz.org] One of the Hybridz members RB25DET [forums.hybridz.org]. If that doesnt work because you are not a member try this [forums.hybridz.org] and look at J Taylors signature. 489whp.

So it seems that the VG30ET and the RB25DET are pretty well matched. Jason the owner of [www.redz31.com] Lives only 3 hours away from me. Grand Rapids or Kalamazoo? And he quotes 480whp. Maybe we will meet up and go terrorize some vettes? Only time will tell.

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RB-Z31 RB30DET project. 400whp SS # 981 DD