Need some help

[mtcookson]

I'm swapping a VH45DE into my 75 280Z and am planning on turbocharging it. I'm trying to figure out what the best setup will be for the rear end.

 

I'm having a hard time deciding between the R200V and the R230. I already have the Q45 diff. since I just bought the whole car for the engine and such but can't seem to find definite info on some things.

 

I'm wanting to make probably at least 600 rwhp so its going to need to be quite strong. From what I've found so far it seems the Z32 R230 would be the strongest (next to the Armada R230) then likely the R200V would be next. It seems the R200V is supposed to have stronger axles but from a bunch of pictures I've seen, the R230 and R200V have the same bolt pattern for the CV's... is this true?

 

Another thing I'm trying to decide on is gearing wise. The R200V comes with a 3.538 ratio and the R230 a 3.692. Its a slight difference, but enough so that I can't decide which would be best.

 

In the end, I guess I'm basically trying to find out what would handle the power the best for my setup. I have another thread in the suspension forum trying to figure out what would be strongest there and that will likely be a big factor into what diff. I can use but any input would definitely be appreciated.

 

Before confusing myself more looking at all of the different setups I was basically considering this setup:

 

Definites - VH45DE with a turbo and a Z32 TT 5-speed

 

Most of the parts I was planning on getting were from MM:

 

Billet R230 CV adapter with custom axles (anyone know if this was designed for the true Z32 R230 or for the Q45 R200V commonly mistaken as a R230?)

Billet 280Z stub axles w/ 5x4.5 lug pattern

 

I was also thinking about getting their new rear control arms... but that's pending on what would be a good suspension setup. The 240SX rear end swap really caught my eye since you can use the coilovers and the Q diff bolts right up but I'm still very undecided on the whole setup.

 

Basically, I need it to handle the power but I definitely want to keep it an IRS. Any pointers?

[Guest scarab73]

Billet R230 CV adapter with custom axles (anyone know if this was designed for the true Z32 R230 or for the Q45 R200V commonly mistaken as a R230?)

Billet 280Z stub axles w/ 5x4.5 lug pattern

 

Basically, I need it to handle the power but I definitely want to keep it an IRS. Any pointers?

 

The cv adapter and moser axles were designed to accomidate either a R230 or a R200V, so says Ross at modern motorsports, with the amount of power you are going to be running the tires will most likely act as a fusible link, so I woulden't worry to much...

[karay240]

it's a common imstake to think that the R230 is stronger than the R200, anyways. The diff itself may be stronger (although I'm not sure), but the stub axles on the Z32 diff are the weak link, and I've talked to several Z shops in japan that convert to the GTR R200 (Escort's drag Z included)

[mtcookson]

So would you say the R200V with MM billet adapters, custom axles, and the billet stub axles would be a strong enough setup?

 

Then from there just basically build up the subframe to keep it all from twisting and such.

 

I'm thinking of settling with the R200V because for one, I already have it, but there seems to quite a few more options around if I use it. If I happened to go with the 240SX rear suspension I could fit that in there, there are already a bunch of mustache bars made for it... seems like the way to go. I just want to make sure I can build up the rear to handle the power.

 

Thanks for the help.

[karay240]

here's a little disclaimer: although the pumpkins are interchangeable, the GTR stub axles are different than the 240SX R200.

 

That being said, I'd say go w/ the 240SX diff, and IF you have any problems, then upgrade the internals and stub axles. There just isn't any reason to waste $$$ on stuff you don't need.

 

I really don't think that the diff is going to be the weakest link, anyway. Once you strengthen something, it's the next weakest link that breaks.

[mtcookson]

I was planning on using the Q45 R200V differential. From there I can bolt the Q45 hubs onto the 240SX subframe (from what I understand) then just get custom axles. That way the hubs would be the same and I'd have the 5 lug pattern that I want.

 

The thing I really like most about the 240SX setup is that I can use the 240SX coilovers from what I understand. I would so much love to use real coilovers over the sleeve type as the quality is just so much better and there are tons of choices. From there I'd just have to figure out how to make the front work out and improve it since, suspension wise, the front seems to be the weakest link in handling.

[karay240]

The use of the R200 diff alone will not allow you to use the hubs. the hubs bolt to a spindle/upright that bolt to control arm(s). This means that if you're wanting to use the 5 lug from the Q45, you'll need the nissan multilink subframe. There are other methods of 5 lug conversion, so I suggest going w/ that.

 

Besides, when mixing & matching shocks & springs from front to rear, you run the risk of the handling getting worse. This is especially true w/ coilovers for the 240SX. This is not to say that they are poor quality, they are just generally oversprung and overdampened even for the heavier 240SX much less on a 240Z that's much lighter. I'm almost positive that the balance b/w the front and rear will be horrible, and ride like crap.

 

just my $0.02

[mtcookson]

yeah, i was thinking about using the whole 240SX subframe per these threads:

http://forums.hybridz.org/showthread.php?t=96050

http://forums.hybridz.org/showthread.php?t=106726&page=1&pp=25

 

The other idea is stick with the stock rear and get the Modern Motorsports stuff to put in the Q45 R200V (using the appropriate mustache bar of course). Then from there just strengthening everything.