rb25det vs. vg30dett

would it be possible to drop a rb25det in a z32? or how about a rb26dett and make the z32 awd.

Yes. But its like telling a really fine chic in a bikini top that her tit is hanging out. Why do it?

and I thought this was a 240sx forum

and I thought this was a 240sx forum

What were you thinking man? lol

nissanfanatic wtf dose that have to do with the question ???

uhhh he said "yes" as in you could drop one in so i think it answered the question if u ask me. anything is possible if u have money so its kind of a stupid post to begin with.

alright ya so no one ask anymore questions cuz the answer is "money"
might as well shut down the forum :naughty: j/p

nissanfanatic wtf dose that have to do with the question ???

Well basically, why would you want to put a RB into a Z32? too much work and no more potential, less in fact because of less displacement. Yes I said it, less displacement. Secondly, why would you want to put a VG30 into a Skyline? The car would have to be converted to RWD taking away one of the very great assets of the car, acceleration. Once again, MONEY would be needed to fabricate mounts because this swap probably isn't too common(I don't know why, it seems like a pretty good idea). So basically, its like telling a really hot girl that her boob is hanging out, no one in the right mind would do it. Understand or should I copy and paste this a few times? Post this in some other forum. It has nothing to do with the 240sx. And please, read my signature one more time.

RBs don't have less potential then VQs because of less displacement, RB26s have gone up to 1300hp and still have a streetable powerband, VQs have about 800 and are purely race cars. I'm not saying the VQ isn't as good an engine, I know it's a sick engine, I'm just saying RBs don't have less potential because less displacement.

any way to lighten up the z32

Replace stock parts with light weight ones (racing seats, carbon fiber body panels, etc.) and strip the interior.

RBs don't have less potential then VQs because of less displacement, RB26s have gone up to 1300hp and still have a streetable powerband, VQs have about 800 and are purely race cars. I'm not saying the VQ isn't as good an engine, I know it's a sick engine, I'm just saying RBs don't have less potential because less displacement.

Not VQ, VG30. VG30s mave more potential because "there is no replacement for displacement. Sorry, but a properly set up V8 will kill anything we have. VQs are in the new 350z. Why do you think supras make so much power when tuned correctly? Displacement is how much air is displaced by the engine, ergo more displacement, more power. Think of it like a waterhose compared to a firehose. If you were to pressurize(pretend its boost) the waterhose and the firehose to lets say 30psi each, the firehose is going to move more water. This is the same thing with engines.

Here's a formula for you to use.

HP*((boostpsi+14.7)/14.7)=HP with boost
run both the cars at 25psi

RB26DETT=756@25psi with no mods
VG30DETT=810@25psi with no mods
Stock RB26DETT is 280hp
stock VG30DETT is 300hp

Yeah, VG, sorry, but a little thing you don't know is that RB26DETT is like 340hp stock, it's tuned down because japanese laws don't allow a car to have more then 281hp.

Also, RBs can make just as much power as 2JZs.

boost also depends on the turbo size (back to the water hose analogy) what im saying is that 25psi on one turbo is not the same as 25psi from another, like the tiny turbos they use on busas vs a T78

now this is a touchy subject

I think the RB is a better race motor FACTORY.

The VG in the end does have more potential to make power

but its just not displacement, see you could make a SR20 make more power then a v8 easily, its all about the airflow. and im not just talking about boost or an exhaust.

Im talking about ported heads, oversized valves, cams, intake manifolds, all these things help out the actual airflow. If both engines had same type of cams and both heads flowed exactly the same amount of air, then displacement is the final factor in making power, so with all things exactly equal the VG will make more power. From the factory with just boost and computer mods I think the RB can flow more air.

just MHO.

the firehose was a good analogy, but it just compares displacement, what the engine can flow opened up. Now to put the heads and supporting elements into the mix, that would be like adding a tip to the hose.

Say the Rb26 has the smaller hose, but the tip of it is more straight through and a larger opening. The VG30 might be a bigger hose but the tip or nozzle on it is smaller so it wouldn't flow the same amount of fluid even with the greater sized hose.

Thats what I'm saying, if the same modifications are made on each engine, the VG will make more power. If you port the heads on each engine the same amount, then the VG is still going to make more power.

Also the fact that straight sixers are made to hold one big ass turbo, butit's tricky to get a single turbo on a V6.

yes you make a good point, not only is it tricky to put on a single turbo, but the way that its done REALLY dampens the airflow

I was under a Chevy 3500 turbo diesel we had in the shop and I was checking out the exhaust while I was under there. Picture this, and this is really shitty design lol

regular chevy type manifold on driver side, that goes level with its exhaust ports and then wraps around to pax side exhaust manifold

now picture how a regular chevy manifold exits out the back, on the pax side this is where the exhaust from the drivers side enters into the pax side manifold! You can imagine the turbulence this causes....then on top of the pax. side manifold is the turbo, which then exits via conventional downpipe

I would be pissed if I had a car with that type of exhaust setup

redline, these guys are right, there is no point in doing the swap. If you were to take the money you would spend swapping your motor with the skyline motor, and just drop it into the VG30, you would have WAY more power thatn you would with the RB.

By the way, anyone figured out why japan folks are swapping out 2JZ out of their supras and putting in RB26, I mean it doesn't make any sense to me, both inline 6, and I have always heard that the 2Jz was more powerful.

They like the RB's higher revs. At least that was the reason Top Secret had for doing it.