RB25DET in 300Z

Post by **AznRide** » Wed Apr 21, 2004 8:41 pm

Is the RB25DET bolts on to 300Z like SR into 240s? Anyone have any info on how to do this?

Post by **Onizuka** » Wed Apr 21, 2004 8:41 pm

There is a Z31 trim in japan that comes with the RB20DET (200ZR or something like that), i've never heard of the RB25 bolting up to any Z car though.

Post by **AznRide** » Wed Apr 21, 2004 8:41 pm

i thought nissan have the same chassis setup...weird. But I think i'm gonna do it anyways, the worst thing would be fabricating the mounts.

Post by **k6kicker** » Wed Apr 21, 2004 8:41 pm

this seems like a downgrade to me unless its goin in a z31...the vg30de(t) is a much better starting point then an rb25...also i wish you luck in tryin to fit the thing in there..the vg isnt an overly long motor and it BARELY fits in there. Tryin to lodge 3 more forward cylnders sounds like fun to me

Post by **NeedCAforS13** » Wed Apr 21, 2004 8:41 pm

RHD RB26DETT powered z31... Canadian legal and for sale for only $24k CAD...

http://www.importconcern.ca/broker/10080/

thats one bada$$ Z :ylsuper

Sean

Post by **Onizuka** » Wed Apr 21, 2004 8:41 pm

k6kicker wrote:also i wish you luck in tryin to fit the thing in there..the vg isnt an overly long motor and it BARELY fits in there. Tryin to lodge 3 more forward cylnders sounds like fun to me

That first picture i posted is a RB25 in a Z32

Post by **AznRide** » Wed Apr 21, 2004 8:41 pm

Well, the motor in my friend's Z32 is blown. The new motori s like 3G, and I hate working on the Z motor so might as well, try something new.

Post by **KaZ (VaBch)** » Wed Apr 21, 2004 8:41 pm

J-Spec Tuner wrote:That first picture i posted is a RB25 in a Z32

Ya, I was about to point that out... ^_^

Post by **Dramier** » Wed Apr 21, 2004 8:41 pm

Oh, it's been done alrite.

RB25DET in a Z31T, that is.

I don't know of any other ones in the US though. You can see pictures here:http://hybridz.org/nuke/module...m=116

We didn't use 200ZR mounts. Everything was custom fabricated.

Post by **k6kicker** » Wed Apr 21, 2004 8:41 pm

you can fit an rb in a rhd z32 but not in a lhd...note all the stuff that even had to moved, the resviours all all moved about, the battery, and i doubt that turbo would fit under a stock hood

Post by **MECPInstaller** » Wed Apr 21, 2004 8:41 pm

a good hammer or mallet and alil elbow grease to the hood and i'm sure it'll fit ........ who knows though i drive a 240 lol

Post by **NismoRb20S13** » Wed Apr 21, 2004 8:41 pm

i've got some pics of my z32 bay with a tape measure, and it would take some serious doing to get it in there,

there is exactly 27.5 inches of usable space from where the VG mounts to the transmission to the front rad. xmember.

Anyone have the measurements of an RB20 or rb25? i just need the length from rb flywheel to tip of the CAS and i'll tell you.

Post by **Zydeco** » Wed Apr 21, 2004 8:41 pm

No audio. Built for drag racing, high maintenance, not recommended for street use.magusta.

Post by **KaZ (VaBch)** » Wed Apr 21, 2004 8:41 pm

Yes it can be done, but there is VERY little room left in the engine bay... Radiator ends up where the A/C heat exchanger... plus its a LOT heavier than the VG and longer, so MORE weight forward of the front axles...

Post by **Andrew300zx** » Wed Apr 21, 2004 8:41 pm

everything i've heard is that the engine is too heavy and cramped to be practical, you might as well go with the a NA to TT conversion, its as expensive if not more, but you'll get more power and keep the handling more balanced...no expert- just what i've heard

Post by **MECPInstaller** » Wed Apr 21, 2004 8:41 pm

Its the coolness factory though of having a rb26. I know If i had the cash i'd do it to my 240

Post by **Bruno240** » Wed Apr 21, 2004 8:41 pm

its a little different to do it to a 240sx. a 240sx four 4 cylinders forward when the 300zx has only 3. so the 240sx has more room. now im not a expect at 300zx's but it sounds like the Rb is heavier and doesnt fit as well. so good reasoning would tell u it would be worth the money to pay for a VG. and also the VG is legal.

Post by **Dramier** » Wed Apr 21, 2004 8:41 pm

And if you did some research on the capabilities of the VG, you would understand why the RB is a better decision.

The VG30 engine in the Z31's is just not a good platform to work with. They don't hold power, don't have any aftermarket, and are poorly designed engines imho.

I could have had a 400HP blueprinted and balanced VG30 for the price I have paid for the RB, but in my opinion, since that VG would be "maxed" out, and the RB is just getting warmed up at 400HP, it's really not even a decision. Sure, it doesn't fit easily, but the important part is that it DOES fit.

Post by **AZ-ZBum** » Wed Apr 21, 2004 8:41 pm

It doesn't sound like you did any research on the VG motors. There are a lot of people running over 400hp at the rear wheels. 400hp is not even close to maxed out. An S130 with a junkyard VG30 dynoed at over 700 rwhp and was quite happy there for the 80 plus dyno pulls while they were tuning it.

There is lots of support for the VG. It was in Nissan trucks and a few different Nissan cars for years.

Jim Wolf Technologies has several different HP packages from 350 to 500 with just bolt on parts (bigger injectors, Ford Cobra MAF, bigger turbo, and reprogrammed ECU).

And if you blow up the VG, you can just go down to the local junkyard and pick up another one for a couple hundred bucks. With an RB, you have to deal with the importers who may or may not have one. And if they do, the price is generally in the $1,000 and up range. Plus, since the motor was never in any US cars, it's not like there is a huge source of aftermarket and replacement parts available for it over here.

Post by **Dramier** » Wed Apr 21, 2004 8:41 pm

I am planning on building up the VG30ET I still have and putting it to the test. I guess a fast way to find out is just to do both and see which one performs better for the least bucks and most reliably, right?

I have never even heard of a VG30 putting down over 500HP, but that doesn't mean much because I don't live in an area where anybody touches VG30's.

Basically what I'm going to do is put bolt-ons on both engines, dyno, and see which one produces more horsepower at each "stage". Keep going until the first one blows without internals..

I took a risk gamb|ing on the RB being the better of the two engines, but I also kept the VG for backup -just in case- I was wrong.

As far as the aftermarket for RB's go, I have had much easier of a time getting RB parts than VG parts, and couldn't even find a shop willing to touch the VG when I first started this whole project. Perhaps had I known somebody who had built a VG30 with some horsepower, I might have had better knowledge to build the VG30, but that didn't happen. I have nothing against them at all, but I just don't think they are the best bet.

AZ, I have learned you are one of the people on the Z boards who actually knows alot about the cars, and I would definitly love to see some of the VG's you are talking about. But mostly due to the attitudes and opinions of some of the folks on the Z boards we both frequent, I grew frustrated and tired of even dealing with trying to find out about the VG30. There is more I would go on about, but I do not want to talk about other forums in this forum, since it wouldn't be fair to the other forums like that.

If you'd like to hear why I made the decisions I made, and what I'm talking about in regards to the Z forums, feel free to contact me via Aim.

By the way, as far as going down to the local junkyard goes.. I have yet to find a VG30 in a junkyard. Maybe I am just plain unlucky, but I have not been able to find one. The inability to locate a replacement VG30 to use as backup and to replace the stock VG30 I had to rebuild was a huge factor in why I made some of the decisions I did. There are alot more reasons, but I won't go into all of it on here.

Post by **Rex** » Wed Apr 21, 2004 8:41 pm

Not sure what part of "Georgia, USA" you're in, but there's 2 guys named Buddy & Tommy that have a shop near Albany, and they have been in the Nissan game sine the early 80's. They had this old school bus yellow 510 that used to eat Mustang GT's all day.

They put a 300Z's V6 in it eventually not sure if it was a VG or not??

Post by **evildky** » Thu Sep 16, 2004 7:55 am

if it's a 30

Rex wrote:Not sure what part of "Georgia, USA" you're in, but there's 2 guys named Buddy & Tommy that have a shop near Albany, and they have been in the Nissan game sine the early 80's. They had this old school bus yellow 510 that used to eat Mustang GT's all day.

They put a 300Z's V6 in it eventually not sure if it was a VG or not??

if it's a 300z engine it's a VG, yeah there is a company that makes VG30ET swaps for 510 gotta love that

Post by **andrave** » Thu Sep 16, 2004 4:32 pm

what would swap into an infinti m30? it originally uses the vg30e but I'd sure like to at least put an ET in there... the vg30de would be even better.

Post by **AZ-ZBum** » Fri Sep 17, 2004 12:49 pm

Okay, I realize this thread is a lot old, but...

Draimer, if you look, there are several people now making over 400 rwhp in a VG30et with nothing more than different ECU (reprogrammed), turbo, injectors, and exhaust.

Names I can think of off the top of my head:Ken in AZ1SickZPeyman88tadam88ssdanny88serick88ss

Just to name a few. Plus, there are a few people in the process of building motors right now with much more potential.

And if you can't find a VG30, you haven't opened your eyes. They came in:Quest MinivansPathfindersTrucks300ZXsMaximas200SXsM30sand probably some other cars I can't think of right now.

andrave, short list:VG30ETVG30DEVG30DETTRB26DETTRB25DETRB20DET350V8

Any one of those motors will swap in. Most will take a bunch of time and a lot of money. Easiest to get more power would probably be the VG30ET. But you'll need a different front crossmember to mount the motor on. Not sure if the M30 uses the same basic mount as the Z31, so you may be SOL and have to fabricate your own.

Post by **evildky** » Fri Sep 17, 2004 9:15 pm

andrave wrote:what would swap into an infinti m30? it originally uses the vg30e but I'd sure like to at least put an ET in there... the vg30de would be even better.

4.5 V8 from aQ45 ? I have no idea if it would fit but it would be cool

Post by **andrave** » Sun Sep 26, 2004 2:21 pm

I was thinking bolt ints. The vg30de doesn't bolt into the z31, does it?if it does, it should bolt into mine. from the research I've done I believe my mounts at the same as those used on the 200sx SE v6, and IIRC, someone swapped the z31's vg20ET into one of those.

Post by **AZ-ZBum** » Tue Oct 05, 2004 8:07 am

The only motors that bolt into a Z31 are:VG20ETVG30EVG30ETVG30DERB20DETRB25DET

But to get anything other than a VG20ET, VG30E, or VG30ET to bolt into a Z31 you will need to get the appropriate crossmembers and motor mounts from Japan.

All North American Z31s came with VG30E or VG30ET motors. No VG20ET motor came in a North American Z31, but a couple have been imported from Japan.

Post by **AZhitman** » Tue Oct 05, 2004 9:58 am

Good info, Paul.

BTW, when are you gonna post up some pics of that sexy Z of yours?

Post by **AZ-ZBum** » Tue Oct 05, 2004 11:26 am

AZhitman wrote:Good info, Paul.

BTW, when are you gonna post up some pics of that sexy Z of yours?

already did that in the:Official NICO Z picture thread that's stickied at the top.

RB25DET in 300Z

RB25DET in 300Z

Re: (Rex)

Re: (andrave)

Re: (andrave)

Re: (AZhitman)

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