4.3 liter GTR R33

[arnout]

only if you built the block decent. if it's stock block it's a time bomb when you turbocharge it

[arnout]

ok guys, here is the secret to my T56 swap. I have had a custom main shaft made. This is the main shaft of the T56 (Viper transmission) but with the output splines of the Skyline R32/R33 (5 speed) transfer case. Whole operation took almost a year and I am already fitting the engine with the stock 5 speed, as with this axle I now have to make an adapter to bolt the transfer case to the T56 viper transmission (which will take me another 6 months or so). Anyways, for all the people that asked how, here is how:

[Snowgasm]

Hi Arnaut,

Any updates on this project or has it come to a hold?

Am waiting in anticipation for some more pictures

\\

[englishrodder]

Originally Posted by arnout

And this should fit in the car:

Just seen this, interesting build.
Just checking you're not actually going to use the engine mounts like in the pics?......Hope they are just mock up ones....

[arnout]

yes everything is still mockup until I get all final pieces back from my lasercutter & cnc guy

[M SKinner]

arnout, who made the new mainshaft?

[n600hks]

good work loving it

[Marko R1]

that is nuts - very creative & the finished product will be out of this world

[kismetcapitan]

interesting - one piece (mainshaft) to make the Tremec swap possible (apart from adaptors of course). Making the Tremec possible for the GT-R would be wonderful - a big torque-capable transmission without having to go with a pricey sequential. The gearing does seem quite long though - I'd personally look into bigger diffs, 4.3:1 or possibly more?

This year I've suddenly gotten interested in V-8 engines. Realizing that they are shorter and a touch lighter than the RB26, that opens up a lot of possibilities. Better weight distribution. More displacement, lots more.

I hope to see more of these done, and possibly conversion kit parts so that everyone doesn't have to reinvent the wheel.

Well, here are my ideas: if the V-8 were dry-sumped, then couldn't the front diff be welded into a higher position (allowing for a lower and straighter mounting of the engine)?

With low-mount turbos, the intake filters could easily and simply extend forward under the bumper and well out of the engine bay. Exhaust is also very straightforward. Just attach pipes and exit out the sides - I don't see any benefit in merging the exhaust pipes after the turbos...is there? for twin turbos, I just can't think of any reason to siamese the pipes after the turbos.

Plus, side-exit exhausts are cool, especially when on each side

Intercooling would require a shorter radiator, so that the center collector for the intercooler can clear the top of the radiator and feed into the intake plenum.

What does the Toyota plenum look like, anyways? The VH41DE plenum looks horrific. Need something sexy like a Maserati plenum.

I would like to see a comfortable 800bhp out of such an engine, with a good torque curve for maximum streetability. Maybe something slightly bigger than GT-RS turbos.

The worry of course is the engine block. It can be sleeved of course, but then if we have to sleeve, might as well go with a VQ35 twin turbo. That V-6 has been successfully converted to AWD in a Z33, using Infinity G35x parts, and Cosworth does prepared kits.

But then, it doesn't sound like a V-8, and sound matters!

[arnout]

Kismet!
thnx for your big reply. I love feedback! Let me go through your comments:

Originally Posted by kismetcapitan

interesting - one piece (mainshaft) to make the Tremec swap possible (apart from adaptors of course). Making the Tremec possible for the GT-R would be wonderful - a big torque-capable transmission without having to go with a pricey sequential. The gearing does seem quite long though - I'd personally look into bigger diffs, 4.3:1 or possibly more?

yes correct, a T56 is a real nice unit with big gears and it's very cheap as well. Even when you buy new it's very affordable. There are a lot of flavors on the T56 if you take the viper transmission you can get a 0.7 and a 0.5 as the last two gears (yes double overdrive). A 4.11 is excellent final drive for a 6 in line engine, but 4.3 is also fine. 3.545 I will use on my V8. Also be aware that I am first putting the V8 engine in the car with the stock 5 speed of the skyline. The whole LHD conversion and V8 conversion with all the pipeworks is already taking a lot of resources (time, complexity and money) and I don't want to make the whole project too ambitious or it might never get finished.
Once I got the v8 conversion in the LHD body I will put a viper transmission in. Then I might also put it in the rear using the T56 design of the Z06. It all depends on the weight distribution of the car, I will corner weight it once it's finished.

This year I've suddenly gotten interested in V-8 engines. Realizing that they are shorter and a touch lighter than the RB26, that opens up a lot of possibilities. Better weight distribution. More displacement, lots more.

Correct. Back in the days I always thought a V8 was heavier than a I6 but these days I learned V8's are ligther and generally speaking better. also if you build a V8 correctly you can also rev it up to 8000RPM easily. Which is normally sufficient in most applications!

Well, here are my ideas: if the V-8 were dry-sumped, then couldn't the front diff be welded into a higher position (allowing for a lower and straighter mounting of the engine)?

No not really. you cannot really mount the centre of the crank a lot lower, we're talking less than an inch. If you mount it much lower you have to mount the transmission also lower, but as you cannot lower the diff you need to put everything tilted into the body and that gets complex. Also the joints on the driveshaft don't like being too much angled.
The distance between the mid of the crankshaft and the mid of the front diff is also pretty much fixed, making the front driveshaft as horizontal as possible. If you angle the front driveshaft too much your constant velocity on one side of the shaft will become a sinus-velocity on the other side.

I don't see any benefit in merging the exhaust pipes after the turbos...is there? for twin turbos, I just can't think of any reason to siamese the pipes after the turbos.

the pulses of one bank will suck the pulses away from the other bank. Although if you really really design the exhaust manifold well, it's better to join the two outside pipes of one bank with the two inner pipes of the other bank. Making the pipes all equal length (which is normally pretty undoable) you will have a constant drive to the turbine. Balancing out the whole after the turbos is a good idea so I heard. Although on my neighbours monstertruck his V8 has 8 exhaust pipes, one for every cylinder.

What does the Toyota plenum look like, anyways? The VH41DE plenum looks horrific. Need something sexy like a Maserati plenum.

The toyota manifold is mainly designed for torque down low and in the middle. it stops filling the engine above 5500 to 6000 rpm. So you need to build one yourself with a bigger tank and shorter runners. Also regarding my choice of the Toyota V8 is only because it is cheap and I know toyota engines a lot better than nissans. It might be a good idea to also look at various LS engines (LS1,LS2 etc.) as those are also known to deliver..

I would like to see a comfortable 800bhp out of such an engine, with a good torque curve for maximum streetability. Maybe something slightly bigger than GT-RS turbos.

I was originally planning on using two turbos in the range of 61mm to 65mm inducer. So of the GT30 to GT35 type. I can easily do a sequential setup like the supra has with their exhaust valves. but then the other day I found a set of porsche 997 VTG turbos on ebay germany for pretty cheap. I scored those and planning on using them first, possibly with an upgraded compressor wheel to give it some more air. VTG is really nice!
Do you have pics of that 350Z that is converted to 4WD? Sounds very interesting. What kind of 4wd system does it have? fulltime or atezza alike?

[Pontio]

This is mental!

[SkylineGTRCy]

You're nuts!!!!! Love it.Finish it. Let us witness it

[kismetcapitan]

Damn Arnout, you sure know what you're talking about!

Both BMW and Audi are running 4 liter V-8s well over 8000rpm.

I just thought that the front diff might have some flexibility in mounting position (and therefore allow a lower engine mounting) if you used a custom dry-sump oilpan...but I forgot that one of the driveshafts goes through the oilpan, under the crank and out to the other side Well, that's a good idea for the next 3 wheel drive build you might do

I think (could be wrong) that the exhaust you're talking about would be for a single turbo on a crossplane V-8. I think the reason Ferrari went to flatplane V-8s was because cross-merging equal length pipes from both banks is nearly impossible, but getting equal length 4-1 pipes for each bank is doable.

Just because I'd want side-exit exhausts, I'd treat the exhausts as if I were running two inline-4s. On top of that, as for turbos...I'd have to go look at what the SR20 guys are choosing to make 400bhp engines.

I don't have any pictures of the 350Z but I read the thread on the US Nissan board. It's a full ATTESA setup, not just the hardware but the ATTESA computer as well. If I were in the States (with no access to legal Skylines), I'd have gone for that same kind of build - Z33, 800bhp VQ35DE twin turbo, AWD added from the G35x, and that Veilside body kit that the bad guy drove in Tokyo Drift

[kismetcapitan]

oh and getting the T56 to work in the Skyline would be so beautiful, because even new they cost peanuts, and are rated for 600lb/ft torque, and are 6-speeds. No downside in my book (other than not fitting!)

[Sub Boy]

This is a fantastic build Arnout!! I cant wait to see the finished car.

I haven't driven a Viper....But have driven many cars with Tremac T56s, And without being nasty....I've had smoother road rash!! They may be able to handle a bit of power, but are clunky, notchy horrid things.

....I hope you get your's to work better!