Rb25DETT swap into 92 Q45

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

Has anyone ever attempted to swap a Rb25DETT or Rb26DETT into a Q45? I was thinking about it, and that would be an awesome engine for the Q.

Does anyone have any idea how easy or hard it would be to do thius swap? And would it be worth the trouble?

Would it be easier to turbo/supercharge the VH45de, then do do the swap?

Any idea how much it would cost?

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

How much does a Rb25/26DETT cost?

Post by **BoostFab** » Wed Jul 28, 2004 9:08 am

why take out the V8? why not go twin turbo ?

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

I would have to get a new exhaust fabricated to do that

Post by **rbsileighty** » Wed Jul 28, 2004 9:08 am

A turbo setup on the Q would cost about as much as a RB26DETT motor minus the swap. Unless you are running a custom TT setup on the 25... it is only a single turbo from the factory.

It would be a sick swap, but I would consider this instead unless you have a lot of $ to burn on a RB swap.

Q motor w/ forged pistons (pull the compression down to 8.5 from 10.2) and run a pair of big GT25's or small T3's and you'll put down somewhere in the neighborhood of 490-600 rwhp (ray hall turbo calc) when pushing 12-15psi. When putting out this kind of power... I would stop with the motor and start looking into the rest of the driveline. Be sure you can supply enough fuel and oil (oil's a concern since it's a NA car originally)...

You may spend almost the same as you would on a RB swap with this method... but your starting point will be way ahead with the VH.

Post by **SeVa-S13** » Wed Jul 28, 2004 9:08 am

There's a post about an RB26-powered President in the Infiniti forum a while back--neat idea. But I like the idea of the TT V8 more myself, plus you don't have to change any wiring.

Post by **Joe** » Wed Jul 28, 2004 9:08 am

PoorManQ45 wrote:I would have to get a new exhaust fabricated to do that

ROFL and you think thats gonna be harder/cheaper than swapping a RB25 in?

man you need to do ALOT of research!!

p.s. there is no RB25DETT. its a DET. only 1 turbo.

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

Is there a manual transmission that will fit on the VH moter?

Post by **IvoryJ30t** » Wed Jul 28, 2004 9:08 am

the Z32TT trans will need an adapter plate, and a spacer disc for the flywheel.

no manuals bolt up to the VH.

Post by **BoostFab** » Wed Jul 28, 2004 9:08 am

Kamin wrote:ROFL and you think thats gonna be harder/cheaper than swapping a RB25 in?man you need to do ALOT of research!!p.s. there is no RB25DETT. its a DET. only 1 turbo.

i 2nd that....

PoorManQ45: seriously though, the v8 on the q45 can put out some good #

this one in japan made 720 HP, even though it's swapped into a 240z, but it's still a Q45 (VH45 V8 motor): More info: click me

Post by **JonPowell** » Wed Jul 28, 2004 9:08 am

That car is awesome....note my avatar!

Post by **IvoryJ30t** » Wed Jul 28, 2004 9:08 am

PoorManQ45 wrote:I would have to get a new exhaust fabricated to do that

your gonna need a new exhaust fabricated for the RB, anyway.

Post by **Project240** » Wed Jul 28, 2004 9:08 am

Kamin wrote:ROFL and you think thats gonna be harder/cheaper than swapping a RB25 in?

man you need to do ALOT of research!!

I laughed my *** off.

And, I agree, that TT VH45 is SEX :fruit

Post by **masamunex03** » Wed Jul 28, 2004 9:08 am

look at thishttp://www.discountchips.net/2...l.mpg

read all of this, or just look for videos and dyno numbershttp://www.ufba.org/forum/index.php?topic=3476.0

replicate their design-its very simplehttp://ststurbo.com/

dont worry about the oil pump, patent pending my bumhttp://www.thinkauto.com/acata....html

http://www.northerntool.com/we...d=147

Laugh at everyone who told you otherwiseSee with eyes that are unclouded

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

Would the remote mount turbo system work on a Q?

Has anyone seen one of these kits before?

Is there enough room on the bottom of Q?

Post by **masamunex03** » Wed Jul 28, 2004 9:08 am

I'm sure it hasn't been done on a Q. The kit has been around for about 2 years. Though it looks like it may be very intolerable to the weather people drive their cars daily(read on forum). I love the sound of a Chevy Tahoe blowing off. Be a pioneer so everyone else can swing from the monkey tree. Cheers

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

LOL. Need moneyy to be a pioneer. Since the Q has dual exhaust, would I need to have both exhaust pipes flow into the turbo? Don't want uneven pressure on engine. Or better yet, how about a twinturbo system. That would be sweet.

Does anybody see any problems with the way this system works?

How hard do you think it would be to modifiy their kit?

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

masamunex03: The website says that the turbo system can hold up to the weather

Post by **masamunex03** » Wed Jul 28, 2004 9:08 am

I said it looks intolerable but the people who daily drive it(from what I've read) say it holds up fine. I'd say just use a Y pipe to the turbo. The only thing that you would really need from them is the oil pump. Maybe you can get it from them cheap. Or you can look into those sites I posted. Twins would just up the price. Just get a decent sized turbo that would suit your car well. From what I've read they use a smaller A/R housing to spool the turbo faster. I know the forum post is very long but it answers all types of questions. Also I would recommend you just fab it up yourself. Basically its just an exhaust connected to a turbo mounted close to the rear of the car. The turbo elbow/downpipe just exits the rear and the charge pipe goes to the intake. I don't endorse this system because its 3500 and frankly I'm cheaper than a girl with 80's hair hanging out on a corner chewin gum and whirling her purse around. Also I do not own an f-body and don't have the system. I like the idea, the simplicity, and the DIY friendly set up. Of course your going to have to get down under the car and see if you could actually find a nice mounting point. Along with all the other things that come with a conventional turbo set up in terms of sizing, and fuel management. But other than that it looks like this thread seems to have jumped out of the RB theme. Sorry about that.... Its whiskey for my men and beer for my horses. Support the Big N(pun). Don't watch DR. Phil.

Post by **PoorManQ45** » Wed Jul 28, 2004 9:08 am

I came to the conclusion that the the Rb swap would be a no go.

On their turbo system, they use the charge pipe as an intercooler. Would a special kind of piping have to be used to get this effect. Or, is it just the length of the pipe that causes the intercooling effect?

Can you give me any suggestions on turbos that could be used for a rear mount setup. I know how turbos work, it's just that I don't know much about them(If that makes sense).

Does anybody know if there is a place to put a turbo at the rea of the Q? Also, is there anyway to get the charge pipe from the turbo to the intake?

Rb25DETT swap into 92 Q45

Rb25DETT swap into 92 Q45

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