RB25 engine swap into 240SX

[nissanpower]

I would like to swap the skyline engine into a 240SX but i would like to ask you guys which year and model of a 240SX would make this swap easier to do.Thanks

Matt

[ss240]

gonna take a lot of work either way... might as well pick the one you like best for its looks

[MikeMurphy]

where in canada?

[S13Sil-line]

If you want power steering you might want to get a 92 or newer.

[IveBeenBad]

If you want power steering you might want to get a 92 or newer.

do you mean 91 or newer?

[S13Sil-line]

ya

[nissanpower]

I live in Regina Saskatchewan.

[Kaze]

i have a 90 and has powersteering :oface

[S13Sil-line]

It's more difficult to keep the power steering when you do the swap with an 89 or 90.

[karay240]

Powersteering aside, the AC will not work with a S14. There are ways of getting around it, but not worth it. It takes too much time and money, and I don't think any shop will wire the harness to make it work due to liability reasons. The AC on the S13 is controlled independently of the ECU, whereas the S14's AC controlls are integrated into the code. The only way to retain the AC for a S14 RB car is to run both ECUs (stock $ the RB) together in one car: one controlling the AC, and one controlling everything else. . . But since you live in Canada, I doubt that the retention of the AC is not on the top of your priority list.

If you don't care about the AC, I'd say go w/ the S14. True it costs more, but you get a whole lot more chassis rigidity. You'll need a lot of that once you start talking about high HP. That's why we chose the S14 over the S13 for our demo car.

Don't listen to anyone claiming that the swap is insanely difficult. If you actually get our mounts etc. it's just as easy as the SR swap. The only difference is that you're going to have to remove the crank pulley if you're planning on sliding it in from the top.

KennyUnderground Motorsports

[Kaze]

you will also need to change your stock fan, it wont fint, you need to do some custom mods as well.

S13 is WAY better choice for an RB than the S14, every single person i know out there gets the S13 for about any swap, CA, SR, RB. Just get suspension , ive seen s13's with SR at 500+ HP, so dont say that S13 wont handle HP, cuss you bet it will, has better weight distribution than an S14, and much lighter.

[karay240]

There is a SLIGHT torque difference b/w the RB and the SR, though. . . And yea, the S13 is lighter, and will somewhat handle a mildly tuned RB, but we're not "mildly" tuning our RB. Even with the S14, I know we're going to have to at least put a 8pt roll cage in there.One thing that persuades ppl on getting the S13 for their swap is the price. You're gonna have a whole lot more money left over for a sick swap if you get the cheaper car.

Another reason we chose the S14 over the S13 is for stability. Just like that dumb pontiac commercial said, "wider is better."

Kennyunderground motorsports

[Kaze]

LOL.......yeah that comercial is DUMB, like the statement ^_^

[karay240]

Why do you say that? Wouldn't you rather have a stable car? It's a proven fact that, if everything else is equal, the wider and longer wheel base, the more stability it has. On the other hand, the car with the shorter and narrower wheel base is going to be better at tight low speed cornering. Last time I checked the chassis of the S13 and 14 are pretty similar. Of course, there are ways of getting around this (different alignment, wide body, wider wheel etc), but if you do that w/ an already wider car, won't you end up where you started?

Why do you think it is that you don't see that many miata sized production cars with insane amounts of power with a 180mph+ top speed? The miata is a great car on a tight course (ex. autox), but even if you tuned the miata to 300hp I'd rahter drive a stock rx7 on a higher speed road course. And yes, you're right, compared to the rx7, the miata is rather pedesrian, and you could argue that the rx7 was made for that kinda stuff. But then, why didn't Mazda make the rx7 with a shorter and narrower wheel base if it would make it lighter? Just a thought. . .

[karay240]

And why would you be worried about the weight distribution? Isn't the long RB goning to fudge that up pretty good, anyway? If you're worried about weight distribution, get the SR. The RB swap is for people that are wanting to get more lowend torque and/or more reliable power, not handling. That's not to say that it kills the handling, in fact, it doesn't affect it nearly as much as I thought. I just had to bring up this fact since you started talking about weight distribution and a RB swap in the same thread.

[nissanpower]

Thanks guys for the overwhelming amount of info you guys have given me it'll make my decisions a whole lot easier now. And ya i could care less if I have A/C. It's a waste for the 3 months of summer we get anyways.

[S13Sil-line]

The weight difference isnt that much. I hate when people say that. It makes it seem like 1000 lbs more. Ask the majority of people who have done the swap. They can barely feel the difference if any at all.

[karay240]

Then what's the difference b/w the S13 and 14. That's the only reason I brought it up. I know that the weight difference isn't even noticable for novices. That's why I mentioned "it doesn't affect it nearly as much as I thought."

[S13Sil-line]

I'm talking about in the motors

[Eli]

um guys the weight difference between a s13 and s14 is nothing.Its something like The s13 stock weighs somewhere around 2750lbs the hatch back for that matter. the s14 is something like 2840lbs.

[Eli]

^the s14 is more rigid than the s13 however. . . I know fo sho cause keichi told me in DB

[karay240]

BTW, what I was saying about the RB messing up the weight distribution wasn't that there is a HUGE weight differehces. There is, however, a difference in where the front of the motor sits, and this is the part where many ppl complain about the weight distribution.Eli, you're right in saying that the S14 is more rigid than the S13. This especially true when comparing the S13 HB and the S14.