Z32 300Zx With Vq30 Twin Turbo Conversion

[Boosted Zed]

More progress

[NA_Goodness]

Wouldn't the filters suck in a lot of hot air where they are? Or do you have scoops in the bonnet?

[Craved]

Looks good John, what the best place to get that gold foil heat shielding?

[Boosted Zed]

Looks good John, what the best place to get that gold foil heat shielding?

Bonnet scoops right there near ram pods.

Gold heat shield stuff from Summmit Racing in USA.

[Boosted Zed]

The new VQ30DETT motor compared to the old VG30DETT.

The new motor is running less boost and is on e70 while the VG is running more boost and octane booster

UAS has also recently begun using Computational Fluid Dynamics (CFD) software to aid us in designing elements of our aerodynamics package.

Unforunately time and cost constraints make a true to life simulation a difficut task to achieve, as ideally every component down to the smallest washer should be modeled into the software and then animated to garner accurate results.

STANDARD CAR

FULL CAR SIMULATION

The above two videos show the flow trajectories over the UAS Zed and a standard 300ZX respectively. Though the models are rough they are enough to indicate significant changes in aerodynamic downforce and drag. The figures in the above simulations showed the UAS Zed generated five times more downforce than the standard 300ZX at 200km/h.

To give the exact measurements that is an increase from approximately 50kg to almost 280kg. Drag also increased but only by a factor of two with the standard car measuring 100kg of downforce to the UAS car's 230kg.

The UAS rear wing is a fantastic example of how we use the software to aid our design despite our time constraints. By focusing on a small area in isolation, we can more clearly judge how changes will impact our drag and downforce characteristics.

REAR WING

In this instance it was found that adding a 15mm gurney strip to the larger lower rear wing increased the overall downforce by a significant amount ( ≈ 11%). This produces an extra 14kg of effective weight on the rear at 200kph, with only ≈3% increase in total rear wing drag.

We have also been able to generate numerical data using the program. Doing so allowed us to find a number of interesting results.

On straights, the wear wing of the UAS Zed has a tendancy to flex under the downforce load. This change in area has an impact on the overall downforce of the wing.

Using CFD analysis we were able to simulate a number of different instances. We simulated a straight wing, one with the top wing flexing to touch the lower and an instance of both flexing to the same degree. We did this at both 200km/h and 100km/h simulating a worst case scenario through high and low speed corners.

As can be seen from the tabulated data this flexing causes a drastic change in the dynamics of the wing. Both downforce and drag are significantly reduced as the wing starts to bend.

On straights this is beneficial as it has the same effect as the adjustable rear wing systems used in the 2011 formula 1 season, if to a lesser degree, reducing drag so we can achieve a higher top speed.

In low speed areas it is slightly more detrimental, however it should be noted that at these speeds overall downforce is significantly lower and as such flex is reduced causing a corresponding reduction in overall downforce lost.

[DaveO74]

Hey John forgive my ignorance but what is the big dip at the top of the blue line?

[Count Grantleyish]

Probably wheelspin on dyno?

[DJRIFT]

my take on it is that the red line is the new motor given the red line is less boost. if its the red line it comes on earlier and stronger but doesnt have the top end in it just yet.

its a good signe for an undeveloped engine so far.

[Boosted Zed]

Yes, the sudden drop was the wheels spinning on the dyno, too much negative camber with old road tyres and 18inch wheels with no side wall.

[fatz]

ohhh graphs this is awesome

can you do a CFD on the shape of a r31 just to confirm how awesome it is?

[sav man]

it would be roughly the same as a cfd model of a house

[fatz]

it would be roughly the same as a cfd model of a house

sporty like a sausage dog in a ninga outfit?

[zebra]

Bout time this car showed up in here.

Looking good

P.s How did you go with dick face from Soarer-Central?

[Boosted Zed]

UPDATE

Dry sump tank, Oil system now carries 15 litres of oil. Also electric powersteering pump mounted left rear in the car inside this custom box.

[Boosted Zed]

Check us out on the Superlap website. Ready for Pro Class

[Nur33]

Nice work John thats one hell of a weapon you have made there, looking forward to seeing how it performs, best of luck with superlap keep up the good work

[N1GTR]

What CFD program are you using?

[DJRIFT]

what brand of electric PS pump are you running? if you dont mind sharing.

[r33_racer]

toyota mr2 electric/hydraulic pump????

[bigmikespec]

toyota mr2 electric/hydraulic pump????

Or an Astra?