R32 / Nissan Non-replaceable uni joint best option?

[GTSBoy]

What/who is the go to for replacing uni joints on these things these days? I understand that Hardy Spicers will do them for..... a largish sum of money.

Is there a hack for this that people know about that I don't?

[Duncan]

In the tailshaft? Yeah I had mine swapped across to a larger, rebuildable uni, and it was not cheap for what must mostly have been a welding job. 

Would be good to hear there is an easier option...

[GTSBoy]

Yeah. I fear I am going to have to do the same. I don't have a massive problem with parting with cash. But would obviously prefer to spend on something sexier.

[Duncan]

Well, if you like spending money there are always aftermarket ally or cf options these days....

[GTSBoy]

Well, I clearly don't like the spending, and no matter what it's made out of, a tailshaft is not sexy. I shall likely just have to grit my teeth and do it.

[GTSBoy]

Eurgh. It gets worse. Looks like I also have to spend unsexy money on a new clutch. I haven't thrown a side strap off one in 10 or 11 years. But here we are again. I suspect that I won't get a free replacement this time.

[niZmO_Man]

Get a carbon shaft, they're sexy right?

[GTSBoy]

On 7/28/2023 at 9:16 PM, niZmO_Man said:

Get a carbon shaft, they're sexy right?

I refer you to...

On 7/27/2023 at 12:45 PM, GTSBoy said:

no matter what it's made out of, a tailshaft is not sexy

 

[GTSBoy]

Hmm. Weird shit and bad and good luck all occurring.

Clutch did not throw anything off. Apparently has about a 40-50 thou offset in the pressure plate alignment and a hot spot on one side of the flywheel, which probably go together. Interdarsting. Hopefully the clutch vibes will be solved.

Tailshaft is having surgery. New replaceable joints in its immediate future.

On the day before the car was to go to the workshop I boosted it away from a left turn at traffic lights and got about 2 seconds and 40m down the road before there was a soft poof noise and a flood of blue smoke. My poor old ceramic turbine had finally done the honourable thing and left the housing. Pieces were politely stopped by the cat.

It appears that the death of the turbo is my fault, and not from overboosting. My airbox has been a bit shit for a while. Has broken clips and doesn't close properly and the inlet to the turbo was filthy and it has eaten away at the comp wheel and caused imbalance and that is the most likley cause of death. Do not tell my wife.

Tao will be highflowing it with a BB cartridge and the standard Neo G3 profile. And this might start the wormhole of injectors and AFM upgrades and please do not tell my wife.

[MBS206]

On 8/19/2023 at 4:35 PM, GTSBoy said:

Hmm. Weird shit and bad and good luck all occurring.

Clutch did not throw anything off. Apparently has about a 40-50 thou offset in the pressure plate alignment and a hot spot on one side of the flywheel, which probably go together. Interdarsting. Hopefully the clutch vibes will be solved.

Tailshaft is having surgery. New replaceable joints in its immediate future.

On the day before the car was to go to the workshop I boosted it away from a left turn at traffic lights and got about 2 seconds and 40m down the road before there was a soft poof noise and a flood of blue smoke. My poor old ceramic turbine had finally done the honourable thing and left the housing. Pieces were politely stopped by the cat.

It appears that the death of the turbo is my fault, and not from overboosting. My airbox has been a bit shit for a while. Has broken clips and doesn't close properly and the inlet to the turbo was filthy and it has eaten away at the comp wheel and caused imbalance and that is the most likley cause of death. Do not tell my wife.

Tao will be highflowing it with a BB cartridge and the standard Neo G3 profile. And this might start the wormhole of injectors and AFM upgrades and please do not tell my wife.

Ahhh... The dreaded conversation of "But it needs to be replaced as they don't make the old parts any more, so we need to change them over..."

[GTSBoy]

10 minutes ago, MBS206 said:

Ahhh... The dreaded conversation of "But it needs to be replaced as they don't make the old parts any more, so we need to change them over..."

I'm trying to slide about 5% of the possibility into each phone call while I'm away!

[GTSBoy]

Non-sexy new tailshaft has eradicated the horrible driveline vibes.

Non-sexy new clutch has eradicated the horrible clutch specific driveline vibes.

Mildly sexy new turbo is..... um.... laggier than I had hoped. Boost onset appears to be very gradual now. There are all sorts of reasons why I can't test it thoroughly right now, so the verdict on that outcome is for the future.

[Kinkstaah]

Eradicating horrible driveline vibes, and horrible clutch vibes is definitely sexy.

What turbo was it? From where?

A lot of people's "My bigger turbo isnt as laggy" is also because they screw more boost into it in the middle, and get "more power at X rpm than before" which is not the same as lag anyway but...

[GTSBoy]

1 hour ago, Kinkstaah said:

What turbo was it? From where?

On 8/19/2023 at 4:05 PM, GTSBoy said:

Tao will be highflowing it with a BB cartridge and the standard Neo G3 profile.

My boost controller is still setup exactly as before on the stock turbo, keeping the gate shut until about 10 psi and delivering about 12 psi. That setup on the stocker gave boost starting at about 2k and as such there was noticeable extra torque in the 2-3k range. The highflow is really not interested in spooling down that low. When it comes on, around 3k, it starts to build reasonably rapidly. But the while thing is very much more progressive and linear, and I kinda prefer surfing around on the torque in higher gears, in traffic, which is where I drive it the most.

But...referring back to the "all sorts of reasons why I can't test it thoroughly right now", some of these are that I did not do the injectors or AFM at the same time, and the dyno is broken, so we could not satisfactorily prove that I am not running out of injector. I did give it a hit in 3rd gear (full throttle out to about 7k) and it feels like it has a fair bit of power up there. Given that I was at ~190rwkW before, and that is close to the max of the stock injectors, there is a solid chance that anything that feels faster in the top end is going to be using a lot more fuel and I therefore would be at some risk of blowing it up. I really shouldn't have even given it that hit.

I have to go do some logging in Nistune on the weekend to see if the duty cycle is worrying. In the meantime.... have to be a good boy, short shift and all that. Probably should use the enforced discipline of putting the boost controller on LO too, but that's still ~10 psi and it might still be more air flow than the injectors are good for. I don't want to just turn the boost controller off, because that will leave the gate flapping in the breeze and I'll never get any boost (and only 5 psi). Might be worth a look to see how sad it is, I suppose.

It's all a bit compromised right now, and I will no doubt have to go back to the Minister for War and Finance, cap in hand, and ask for permission to upgrade bits that didn't break! Then I'll probably find out the (040) fuel pump is old and weak and can't keep up, and the diff will need to be done again, and so on.

[GTSBoy]

Logs showed a few interesting things. I probably shouldn't have leaned on it as hard as I did with old fuel in it, because at other times this week I'm sure I heard an angry little man with a hammer. But anyway....I gave it a bit of curry and found:

• AFM truly maxing out at 5.1V. Just. Like, it only gets there at the very peak of the logs. It's not clipped at 5.1V at all.
• Injectors went to over 17ms and reached 86% duty cycle. So, the true limit on the stock stuff is the AFM, if you want to actualy know the load.
• Peak TP (in Nistune, the load index) was 192. My last column is 208. So....after a new AFM and injectors I have to hope that the total injection multiplier thingo does its job and I don't have to rescale.
• Neo boost sensor saw 13+ psi during pulls and peaked at >16 psi, probably when I started to close the throttle.

CEL is on. Bloody neutral switch has died. Was working until the gearbox came out. Grr.

Petrol is enormously expensive atm and I don't want to fill it, but I'm going to have to in a day or so. Then we'll see if it still rattles at odd times.

[joshuaho96]

8 hours ago, GTSBoy said:

Logs showed a few interesting things. I probably shouldn't have leaned on it as hard as I did with old fuel in it, because at other times this week I'm sure I heard an angry little man with a hammer. But anyway....I gave it a bit of curry and found:

• AFM truly maxing out at 5.1V. Just. Like, it only gets there at the very peak of the logs. It's not clipped at 5.1V at all.
• Injectors went to over 17ms and reached 86% duty cycle. So, the true limit on the stock stuff is the AFM, if you want to actualy know the load.
• Peak TP (in Nistune, the load index) was 192. My last column is 208. So....after a new AFM and injectors I have to hope that the total injection multiplier thingo does its job and I don't have to rescale.
• Neo boost sensor saw 13+ psi during pulls and peaked at >16 psi, probably when I started to close the throttle.

CEL is on. Bloody neutral switch has died. Was working until the gearbox came out. Grr.

Petrol is enormously expensive atm and I don't want to fill it, but I'm going to have to in a day or so. Then we'll see if it still rattles at odd times.

This is terrifying stuff. I put a Nismo collector for that sweet 2% power boost on and I've been arguing with some local owners for days that it's fine because after the CA emissions compliance cats the TP index never gets to 88. Even with the HKS turbos at 0.9 kg/cm^2 wastegate boost.

[GTSBoy]

Meh. I knew it would happen. The only question was whether I would have to turn the boost down a little or a lot. The above numbers come from running my controller on LO, which (setup on the original turbo) gave up a couple of psi LESS compared to the HI setting.

I had left it on HI for the first test drives, so it must have been exceeding the AFM limit and running close to or perhaps over 100% DC. That is what's scary. At least it didn't get too much of that.

It seems a lot softer with the lower boost setting, so....it clearly wants and needs more. Thus...

Injectors and AFM upgrade are on the short term plan now. But I have to go away again for a few weeks, so the car will sit.

Edited September 24, 2023 by GTSBoy
Added LESS, meaning about 9 psi, cf 11 or 12 on HI.

[Dose Pipe Sutututu]

Could do a R35 card MAF, post IC and short term bump up the injector base pressure to 4bar.

Just need to put in an arbitrary number for the injector flow rate, and adjust the latency till it idles at stoich with the O2 feedback off.

Or, PM me, I can help with sourcing parts for you. Just have a look on EFI Solution and tell me what you need 😎

[GTSBoy]

Thanks for the offers JDose. My bro-in-law is my mechanic and will sort me out for bits and pieces. He can get Xspurts at v.good prices.

R35 AFM is on the list. I already have a 3" tube adapter for it to go in the stock AFM location. Just need to cut out a flange from ally plate and TIG it on (It's currently bare tube at both ends).

With the injectors, because the ECU is Nistuned, I won't be going as big as 1000s, so we're thinking 525 - 725cc is the go. The smaller the better for not making the old Hitachi ECU bumble and fart at idle. 525s will almost certainly do for me, as I won't be getting near that much power. Realistically though, I'm reasonably confident that it will idle nice even with the 725s. I'll be lucky to do more than 250rwkW through my return flow cooler. That'll be more than enough powerz for how I use it. I'll probably tap out the old 040 fuel pump also.

Need to fix the dyno first though. It had a shit fit and it is a reeeeeeeally old DD, with the analogue control board. So it's not supported by DD anymore and we have to recalibrate the Ouija board so we can make contact with the right spirit/demon to get help for it.