Compound Turbos are slightly different to a belt driven supercharger -turbo system:o but am waiting with interest:eek: let the duel begin:clap2:
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Compound Turbos are slightly different to a belt driven supercharger -turbo system:o but am waiting with interest:eek: let the duel begin:clap2:
Clowns aside, here are the shaft and tension bolt pics. This shaft has been in for 7 years and 30,000km. It is showing signs that it warped enough during hardening to not run completely straight and has been fighting the central support bearing and the end in the LT230.
But no damage. Only enough marking to see what has been going on.
LT230 10 spline end, check out the polish on the outer splines. This is on approx half of the diameter. You can also see the freshly drilled 13mm tension bolt hole. This used to be a M8 thread for a puller.
http://www.aulro.com/afvb/attachment...1&d=1381997070
The central support bearing (in the back of the LT77 casing) used to be on the shoulder between the two sets of seal tracks. It has started to fret, showing that it had high load and was moving. The outer case of this bearing was also polished where it has been orbiting in the LT77 case and is now a loose fit where it used to press in.
http://www.aulro.com/afvb/attachment...1&d=1381997156
Here is the MSA input spline. This was EDM machined originally (aka spark eroded) and appears to be slightly off-centre also.
http://www.aulro.com/afvb/attachment...1&d=1381997373
Here is the tensioner nut which I just finished machining up (it was a productive evening) next to the shaft and cap screw that pulls it all tight. It's great having a little CNC. It took four minutes to cut that hex. Could have run faster but I'd rather watch it for an extra minute than have to start all over again.
http://www.aulro.com/afvb/attachment...1&d=1381997473
M24x1.5 thread to fit the MSA output shaft:
http://www.aulro.com/afvb/attachment...1&d=1381997530
Compound done correctly is not that far from what I am trying to achieve
Being a Supra owner and had the car since 07 when I first got it the stock setup was sequential turbo a very crude kinda compound in essence, Boost was instant with a lull mid rpm, Compound and twin charging don't suffer from this lull.
I am hoping for boost down low and boost in the upper rpm range hmmm guess that ain't a bad idea since that is what the D man want's
http://imageshack.us/scaled/landing/706/c8z2.jpg
It ain't a race nor am I competing ;) (I know I said bet) But I love a laugh and thank the guy that made it happen for me today.
Vm
And all fitted up:
http://www.aulro.com/afvb/attachment...1&d=1381997657
Bolted and tensioned:
http://www.aulro.com/afvb/attachment...1&d=1381997685
The solution to the centre bearing is simple. It'll be going back together without one. Less restraight and let it spin a fraction (likely half a mm) off centre if it needs to. The gearbox and transferbox will be much happier for it.
Now it's just the grind of bolting everything back up and test-driving to see if the solution has indeed been found.
I have no idea what you're talking about and I'm 100% sure you don't know what you're talking about either. The engines I have built are all running.Quote:
Originally Posted by VM_Motori
But try to force big boost into a high compression IDI diesel and yours won't be.
What exactly are you trying to acheive? Posting on the 4BD1 forum about your mighty VM diesel plans?Quote:
Originally Posted by VM_Motori
Of course it'll work, it's just like a Supra.:D:eek::confused::Rolling:
I have a newsflash for you. I'm not expecting you to understand it though. Turbo lag is because you've got the wrong turbo. Trying to fix it with a supercharger is like trying to fix a circuit board with a hammer.
I have 10psi boost by 1200rpm. Low end isn't a problem and I've recently found turbocharger combinations which will do that and still provide 32psi at 4000rpm on this engine.
Single turbo.
Recent revelations show there is no need to compound turbocharge a 4BD1T unless you live at 2000m altitude, have a modified injection pump or both.
I am 100% sure on who you are and what your about Big D ;)
Quote:
(rebuild #1)
Quote:
(rebuild #2)
Glad you got it running 3rd times a charm ;) no wait you went a 4thQuote:
(rebuild #3)
But
10,000 a year and needs a rebuild man my l200 motor got me 8yrs then sold it to a mate and is still running before he sold it and that was in my apprenticeship!Quote:
This rebuild lasted 3 years and 27,000km
Don't know what you did but I would expect alot more from a rebuild
Also might add since I know nothing and all, But to let a compressor wheel get to that state man do you ever check it regularly? I do, But what do I know!
Don't complain to me about being in the wrong forum bud we all know that you are a wizard on the VM engine and all!
Regards
So that's your footprints outside my bedroom window? Makes perfect sense. Stalk on the internet too.Quote:
Originally Posted by VM_Motori
Let's see.Quote:
Originally Posted by VM_Motori
Rebuild 1 and 2 were previous owners. Yep that's clearly my fault.
Rebuild 3 was aircleaner not fitting and dusting the engine. Again the damage happened before it was mine so obviously my shoddy workmanship.
Rebuild 4, wrong rings supplied. 27,000km.
Rebuild 5 is coming up due to a provent sucking oil out the sump and feeding it to the engine in large quantities.
But even then, my engine still runs fine while producing more power and torque than a VM ever will. It's probably also using less water in current state than a VM on a good day.
So no, you still don't know what you're talking about. Same engine and it's still running.
I'll bet those supra turbos see a whole lot of dust. It takes a real connoisseur of cars to drive an L200 for 8 years.Quote:
Originally Posted by VM_Motori
Complaining about you being here? Nope. Just watching and waiting. Make it good, in 24 hours you'll be on the ignore list with your mate.
Wrong part's OK
l200 yep first car started driving her a 15 on my licence btw was a great work horse to cart my bikes around on the weekend and do cash jobs moving people's stuff (love renter's)
Just a FYI my Vm uses no water ;) yeah I know you make more power torque ect ect this is not a measuring stick kinda thing is it?
I have my reasons for my interest's in what I do for my engine, I have a goal what is your's a hp race to the interwebs to say I can or I told you so?
Supra turbos hmm yeah they see alot of dust on the shelf.
Have to ask Dougal Why aluminium for the nut (saving weight}?:D
Thanks for the photos.
Ditto the aluminium? Is that vulcanising rubber locking it (the bits of blue)?
Given no bearing support, worth considering pegging like diff crowns, or like the steady on a lathe. Just off the shaft but there as an assist for excess bowing (if that were ever likely).