Jump to content
SAU Community

Recommended Posts

OUCH!

and oi Chris.. You might provide the cable ties, but remember I'm the one that does the tieing! :(

oh, and I'm with thomas RB26!

This is a VERY complex discussion that can go on for ages, and will surely piss the rest of the whores off if we discuss it in this thread, but in a nutshell, all things being equal, a normal stroke RB26 is better for big power on street fuel than using an RB30 crank for the following reasons-

*The piston speed is lower at the same revs

*There is less side thrust exerted on the bores by the pistons, due to less conrod angular/side motion (less heat/friction)

*The Piston spends more time in the dwell state at TDC and BDC

*The Bore/Stroke ratio is much better (over-square engines like to rev harder)

Which helps, briefly, with the following

*Keeps frictional losses down (engine lasts longer, makes power more easily)

*Helps secondary balance

*Optimises manifold air speed at high revs

And blahdy, blahdy, blah. [/end rant]

Nissan could have made the engine 3L if they wanted to, but they didn't.

P.s 2JZ's and RB30's both have around 6800rpm limits from the factory, which is the same piston speed as an RB26 at 8000rpm.

  • Replies 240
  • Created
  • Last Reply

Top Posters In This Topic

Ouch... how much damage to the head (esp the combustion chamber on 6)?

Pretty respectable effort, haven't seen something that smashed for a long time!

Edit - that quote from R32R at the top of the page is wrong, very very wrong. I think he's got things crossed up.

Ouch... how much damage to the head (esp the combustion chamber on 6)?

Pretty respectable effort, haven't seen something that smashed for a long time!

Edit - that quote from R32R at the top of the page is wrong, very very wrong. I think he's got things crossed up.

That's what I thought too but I'm glad somebody more knowledgable than me said it first.

But but but, if RB30 bottom ends are so good, then why can't I get a crate engine with an RB30 bottom end shipped from Japan? (innocent look)

No one will do it for me! They all say something along the lines of, "Are you stupid?" (innocent look)

(...stupid for asking them to build it, not stupid for asking them to build one and send it)

Seriously though, I'd like to hear someone that is all for RB30's tell me why they're better. I have no idea.

..uhm..so as not to hijack mona's thread, this is for your benefit too moonie :huh::(

i've heard RB20DE
It will be sweet when it has the CA18DE in there, should be an animal,ooops I've said too much.........

Personally, I'd be going for an L16 and turbo, blowing through a decent sized carbie of some sort - 45mm Weber, Dellorto or SU, side-draught of course... :huh:

im sure u can cable tie it back together.. no biggy
Bit of gaffa tape and she'll be all good again..

Ahhh, cable ties and gaffa/electrical tape - the drift/drag/circuit racer's and mechanic's best friend! :(

Seriously though, that is some heavy duty damage. :rofl: Mona, you should keep the parts and display them somehow for memories. Ahhh, the good times!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Latest Posts

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...