RB25DET

[Red93coupe]

How hard is it to swap in a rb25 in a 1993 300zx n/a

[freakonaleash1187]

Not for the average mechanic. You have to be mechanically super-inclined. Search for it though, it has been covered many times.

[mahchu07]

In my opinion this is one of those things that you do to be "individual" if you can even call it that. It is very labor extensive, like freakonaleash1187 said you would need to know exactly what you're doing. Unless you have another car to be around in for a couple of weeks/months I wouldn't even attempt it, but it is one of those things that people look at and say wow. The engine is also rather expensive if you know anything about it, and you might even be better off investing the money into the VG30DETT if thats what you've got. It might even be just as powerful.

Booztd 3 has a couple of threads with pics of his installhttp://forums.nicoclub.com/zerothread/229487http://forums.nicoclub.com/zerothread/231621

Even posted a site with a forum dedicated to the RB install in a Z32.http://www.rbz32.com/

By the way, why the RB25 as opposed to the RB26DETT???

[nsrZ32]

By the way, why the RB25 as opposed to the RB26DETT???

Or better yet....why the smaller RB as opposed to the Twin Turbo VG30 that belongs in the car?

[Red93coupe]

Just wondering my friend has the car not me and he wants to put a turbo charged motor in it... so i was curious. Another question though i was searching the web and i came across a single turbo vg engine out of a zrd32 or something like that what is that all about?? Would it be a good swap for my friend???

[mahchu07]

Or better yet....why the smaller RB as opposed to the Twin Turbo VG30 that belongs in the car?

That's what I suggested before realizing he was working with the N/A.By the way nsr, with as little bias as possible, in the exact same platform(whatever it may be), tuned to their full potentials, which do you think would prevail? The RB26DETT or the VG30DETT???

In response to Red93Coupe's final question, I have been a pretty long time nissan enthusiast and have never heard of any single turbo vg engine. Has anyone else?

[nsrZ32]

That's what I suggested before realizing he was working with the N/A.By the way nsr, with as little bias as possible, in the exact same platform(whatever it may be), tuned to their full potentials, which do you think would prevail? The RB26DETT or the VG30DETT???

In a Z32 I'd just swap in the VG30DETT as I've seen RB swaps in Z32's and honestly, in the end the person pays a lot more money to make 600hp than they would with a VG when you add in the costs of the custom work, the huge price tag on the RB, etc. I think the RB26DETT might have more over all potential in most situations. But honestly, if we're talking big money race prepped motors......if you spent 35 grand on an RB26DETT and 35 grand on a VG30DETT, I'd bet any amount of money that they make damn near the same power.

I have been a pretty long time nissan enthusiast and have never heard of any single turbo vg engine. Has anyone else?

What about the VG30ET in the Z31's? Or in the Cima's in Japan?

[mahchu07]

What about the VG30ET in the Z31's? Or in the Cima's in Japan?

You're completely right. I forgot the Z31's only had a single turbo, and I only recalled the VH and VK in the Cima but they did have VG's as well as single turbo VG's. Correct me if I'm wrong but don't the new ones also have a single turbo VQ30?

I pretty much agree with you on the RB vs. VG. I always assumed they would be pretty much neck and neck and rethought my RB worship after a while. After all, there has to be some reason why the JGTC Skyline's were running V6's after so long instead of the Inline 6 RB.

[perana]

speeking from xperiance its not worth it.Ive recently done one for a mate and he had the motor rb30 with rb26 head.trust me I love conversions I live for it, if thats your reason go ahead just to see the outcome.But if u dont have any parts dont bother sell the car and buy a tt zx. some people swear by a vg30dett some swear at it I am one of the latter but I would never choose a rb over a vg.Why would u put a smaller engine in any way.These are the prices in new zealand dollars: rb25dett m/t $2500,ecu and wiring $3200,labour $1000,drive shaft $600,the rest of the parts we had in his shop. the car makes 392.5 on the wheels,my stock 99 nismo made 400 and all it costed was to turn the boost up.I'm not trying to discourge you but if u want to do a swap put a vh45 in,thats what I did.

[clickdoc]

i was just out at UltimateZ here in chicago and they were putting a skyline TT engine in a 240z -- looked pretty cool and the mounts & such were not too difficult -- or so the mechanic told me -- it was the first skyline motor i have ever seen in person -- even with the stock 280 hp it should really well considering how light the 240z is

[phanatikz32]

the rb motors are a good swap for lighter cars like s13's and 14's in my opinion but i dont think its that great of an idea in a z32. i mean if you think about it logically. the r33 is alot lighter than the z32 i believe the motor puts out less power in the skyline than the vgtt does in the z32. so why would you swap an engine from a lighter car that makes about 280-290 hp stock into a heavier car whose original motor would make more hp in the first place. the only reason i could think of to do this would be to be original. and you must be very talented to accomplish something like that .now if you want to be really ILL then do the opposite, drop a vg30dett into an r33 and see what happens

[phanatikz32]

also its gonna be a ***** to pass smog with that jdm inline 6

GOOD LUCK

[mahchu07]

the rb motors are a good swap for lighter cars like s13's and 14's in my opinion but i dont think its that great of an idea in a z32. i mean if you think about it logically. the r33 is alot lighter than the z32 i believe the motor puts out less power in the skyline than the vgtt does in the z32. so why would you swap an engine from a lighter car that makes about 280-290 hp stock into a heavier car whose original motor would make more hp in the first place. the only reason i could think of to do this would be to be original. and you must be very talented to accomplish something like that .now if you want to be really ILL then do the opposite, drop a vg30dett into an r33 and see what happens

The R33 is actually almost 400 lbs heavier than the Z32.

[phanatikz32]

who told you that? im not sure about that my friend. a buddy of mine drives his sponsors r33 in drift events and without any weight reduction... the z32 2 seater weighs about 3299 lbs. stock right? my buddy's sponsor told me when they bought the r33 stock it weighed in at about 2900 lbs....

[evildky]

the 240Z is only 2400 lbs :p

takes a whole lot less power to be fast

[mahchu07]

who told you that? im not sure about that my friend. a buddy of mine drives his sponsors r33 in drift events and without any weight reduction... the z32 2 seater weighs about 3299 lbs. stock right? my buddy's sponsor told me when they bought the r33 stock it weighed in at about 2900 lbs....

The Z32 weighs in at about 3400 lbs. wet, and the R33 weighs about 3800 lbs. Now when your friend bought the car stock, how does he know it was completely stock? Everyones heard of various parts that heavily decrease the weight of a car, like rims. Did the car have the stock rims when your friend bought them? Stock suspension? If the car weighed 2900 when your friend bought it, it wasn't unmodified.

On another note, there is a guy named honad doing crazy weight reduction on his Z32 and it initially weighed in at almost 3300. Since this is only 100 lbs off of the claimed weight I wouldn't be able to agree with your friend happening to buy the magic R32 that was 900 lbs less that it was supposed to be.

[300ZXpearlwhip]

The Z32 weighs in at about 3400 lbs. wet, and the R33 weighs about 3800 lbs. Now when your friend bought the car stock, how does he know it was completely stock? Everyones heard of various parts that heavily decrease the weight of a car, like rims. Did the car have the stock rims when your friend bought them? Stock suspension? If the car weighed 2900 when your friend bought it, it wasn't unmodified.

On another note, there is a guy named honad doing crazy weight reduction on his Z32 and it initially weighed in at almost 3300. Since this is only 100 lbs off of the claimed weight I wouldn't be able to agree with your friend happening to buy the magic R32 that was 900 lbs less that it was supposed to be.

The R33 Skyline is around 1530 Kg multiply that by 2.2 (conversion to pounds) and that equates to around 3366 pounds

[mahchu07]

The R33 Skyline is around 1530 Kg multiply that by 2.2 (conversion to pounds) and that equates to around 3366 pounds

I'm going off of average numbers that I remember from reading different things over the years, so unless someone finds some reputable source or has pictures of a bone stock R33 on a scale everyone is simply going to throw out numbers.

[300ZXpearlwhip]

I'm going off of average numbers that I remember from reading different things over the years, so unless someone finds some reputable source or has pictures of a bone stock R33 on a scale everyone is simply going to throw out numbers.

Whatever you kept in that small memory bank over the years does not compensate for facts. I looked it up and the approximate weight is around 1496Kg; but please feel free to correct me when I am right.

Year 1995 Make Nissan Model Skyline R33 GT-R Engine Location Front Drive Type AWD Weight 3300 lbs | 1496.9 kg

Performance 0-60 mph 5 seconds. 1/4 Mile 13.60 @ 102.00 mph seconds. Top Speed 250 km/h | 155.4 mph Similar top speeds

Engine Engine Configuration S Cylinders 6 Aspiration/Induction Turbocharged Displacement 2569.00 cc | 156.8 cu in. | 2.6 L. Valves 24 valves. 4 valves per cylinder. Valvetrain DOHC Horsepower 275.00 BHP (202.4 KW) @ 6800.00 RPM Torque 271.00 Ft-Lbs (367.5 NM) @ 4400.00 RPM HP to Weight Ratio 12.0 LB / HP (Vehicles with similar ratio) HP / Liter 105.8 BHP / Liter Bore 3.40 in | 86.4 mm. Stroke 2.90 in | 73.7 mm. Compression Ratio 8.50:1 Fuel Feed Fuel Injected Electronic fuel injection Vehicles with similar horsepower and weight

[mahchu07]

That's good, one question. Where did you look it up???

I'm a military brat, I lived somewhere they have Skylines in abundance. I have friends that live in Kubasaki, Okinawa, Yokosuka, Yakota; friends that drive Soarers, Altezzas, and Skylines. This "little memory bank" has seen more JDM engines before I was 16 than you've probably seen in your life.

[phanatikz32]

dude your prob. right, but its not worth arguing about.... maybe my friend was wrong i mean after all the guy is like 21, young bucks make mistakes. he was prob. just boasting about his car... he has bee known to do that but either way... i still think the vg motor would be better to work with over an rb, taking the motor out is like taking out the soul of the car if you want to run an rb then just buy a damn skyline imo

[ArticDragon192]

Why An RB over a VG? Weight. Simplicity. Also, wouldn't the 25 be cheaper than the 26 to swap in since there's less swapping to do. For a 26 swap I'm pretty sure you need to source at least a 25 oilpan. Plus decent power can be made for the 25. Also, the 25 does power a pretty heavy car, so I don't see why is should be a swap that's can't be done on an NA

[300ZXpearlwhip]

That's good, one question. Where did you look it up???

I'm a military brat, I lived somewhere they have Skylines in abundance. I have friends that live in Kubasaki, Okinawa, Yokosuka, Yakota; friends that drive Soarers, Altezzas, and Skylines. This "little memory bank" has seen more JDM engines before I was 16 than you've probably seen in your life.

That makes me laugh.

[nsrZ32]

Thread locked.

Enough stupid childish behavior where you guys are claiming who has a bigger d!ck and who is more JDM.

Grow up.