RB26 -> S14

[SoOkY]

Im planning to do an engine coversion, R33 rb26dett engine with rb25det gear box into a s14 200sx.

Im planning to do the conversion myself, is there anything you guys think i should know?

Has anyone done this conversion?

Which engine cross member could i use or do i have to get it fabricated?

And also same question as above for the gear box cross member?

Does the gear box bolt straight up?

Thank for the help.

[SoOkY]

bump

[midnkight-lude]

bump

actually in the US. we have a kit that fits a rb25 or rb26 into a S14 aka 240sx here state side. i believe some1 also posted that he is droping a rb26 into a s14

[TTT]

have you checked out the legalities of this conversion?

I didn't think it was street legal..

[PHaT MR30]

umm i would imagine it was? my car was originally a CA18DET now its and RB25DETT. and there is tonnes of cars going round with this mod

[TTT]

is your car engineered?

[Nameless EJ6]

The majority of people who do this swap here in the US do it with a mount kit. I've never heard of the RB26 being mounted into the car with the RB crossmember.

I will be putting mine into an S13 soon, and I will be using a mount kit with a custom driveshaft.

[Sydneykid]

Hi Sooky, try the Silvia forums, this stuff is done and talked about all the time there.

From what I have seen you use a Cefiro front cross member as they are a Slivia platform that came standard with an RB20. So the cross member is designed to fit a RB into that chassis. The SR20 gearbox doesn't bolt up and it wouldn't handle the torque anyway. The conversions I have seen use an RB25DET (as in R33 GTST) gearbox with a spacer to bolt up the standard rear (gearbox) cross member.

Hope that points you in the right direction.

[SoOkY]

thanks for the replys,

so i can use the rb25 gearbox mount with rb25 gearbox cool.

then seems the only major part to get fabricated will be the driveshaft

[midnkight-lude]

thanks for the replys,

so i can use the rb25 gearbox mount with rb25 gearbox cool.

then seems the only major part to get fabricated will be the driveshaft

http://www.mckinneymotorsports.com/sale.php

this is one of the company in the US. thta had made a motor month kit for the car. i am unsure if this would work for you. but it has customdrive shaft to fit and everything.

do you guys have a KA engine or a ca18 or sr20??

cause we used the crossmember for the KA engine with the swap.

[fiendish_S14]

I am going to be swapping in a Rb25DET into my S14 and McKinney seems to be the only one right now who has a RB26 mount kit. Their kit lets you keep both turbos.

Get the driveshaft custom made at a local shop. The KA X-member should be fine if you get their mounts.

[midnkight-lude]

I am going to be swapping in a Rb25DET into my S14 and McKinney seems to be the only one right now who has a RB26 mount kit. Their kit lets you keep both turbos.  

Get the driveshaft custom made at a local shop. The KA X-member should be fine if you get their mounts.

there are a few other. i am waiting to hear about then before i think about using them if i do a similar swap.

now i am wondering if austria ues a KA similar cross member if they aren't. then this kit would be useless.

[SoOkY]

i dont think in australia i have to worry about the rear turbo not fitting as our cars are right hand drive.

We have only SR20det S14 in australia

[MSRB26]

I am nearly finished this conversion. It will pay to do your research though as there are a couple of little tricky bits but its nothing you can get around if you have the know how Its going to be ready very soon so i will let you know how it goes once its back on the road :D

[SoOkY]

So what tricky bit have you run into?

[ido09s]

R32 crossmember

Modify the gearbox crossmember

Modify the tunnel to fit the g/box as it is much chunkier than the SR box

modified tailshaft

plus some more little things once you actually get it in there.

I hope you know what you are doing when it comes to cars and have alot of $$$ & time if you want to do it properly.

[PHaT MR30]

Mine is

is your car engineered?

[Sydneykid]

Hi guys, I have no idea why people do this conversion. By the time you stick an RB into an S14 instead of the SR20DET it weighs more than an R32 GTST. I have weighed a couple and they came in over 1350 kgs, our R32 GTST with an RB31DET weighs 1245 kgs. Even an S13 is really not worth the effort.

In the US where they don't have SR20DET's I can understand it, but in Oz and NZ it baffles me.

[MSRB26]

Its called someone who wants copious amounts of power.. think about it, you go and spend your $30k on a bullet proof SR20DET, effectively your pushing it pretty hard to make 400rwkw and i dont care who has tuned it, you still have a time bomb on your hands. first car that coes to mind is DVLISH..... It either blows up or its only a matter of time before it get tired and needs a rebuild....

so instead you throw your $30k at an RB26 build and effectively have the pottential for 330rwkw with bolt ons...... ad some forgies, a nice set of rods and should have closer to 400rwkw. Take it to the next step and the possibilities are endless.

Now before you go telling me that the power as to be gotten to the ground, yes i already know this. Anyone that has been crazy enough to throw $25k at an RB26 S14 is not silly enough to leave standard suspension or the standard braking system..... its going to take some time and effort to sort it out but its time and effort that gets people the numbers in the end.

As for weight....i think the extra 100kgs will benefit the car in the long run anyway. According to the weigh bridge, my S14a weighed in at 1260 with half a tank of fuel and a stereo when the SR was fitted. Most of the weight added is in the gearbox anyway and its more central than front heavy. Doing these things right takes time, and time i have so its going to be quite interesting to see how she goes when back on the road.

can i ask how many RB26 S14's you have weighed Sydneykid??? as i know of no other S14 with an RB so far and am interested to see who else has done this conversion

[Nismo_Boy]

Hi guys, I have no idea why people do this conversion.  By the time you stick an RB into an S14 instead of the SR20DET it weighs more than an R32 GTST.  I have weighed a couple and they came in over 1350 kgs, our R32 GTST with an RB31DET weighs 1245 kgs.  Even an S13 is really not worth the effort.

In the US where they don't have SR20DET's I can understand it, but in Oz and NZ it baffles me.

Because Sr's are crap

PHaT MR30, pics of your conversion please.