1UZ twin turbo

[Sciflyer]

Which is cheaper we'll never know then eh because i'm positive a simple TT setup would be easier one of those agree to disagree i think? Alot more turbo setups out there than twin SCs though

Twin SCs yes, but single SC vs TT im not so sure, theres quite a few Soarer guys running various twinscrew setups now.

Regardless, im doing research at the moment into a TT setup in my Soarer with two small turbos mounted low down towards the rear of the engine. It seems everyone who's bolted turbos onto an unopened 1UZ has had pretty spectacular results (you included!), basically the power of a serious 2JZ setup but with unmatched driveability at the same time.

But any FI setup if done right isnt cheap even supercharging so i figure might as well go TT, the difference in $ is really academic, its just the packaging and space constraints which need to be overcome first....

[Malicia]

I'm saving my pennies for an intercooled twinscrew setup

Would have it 6 months earlier if I wasn't going to the philippines again ....

[love ke70]

what he said /\/\/\/\

pro-stock is NA
funnycars/doorslammers are SC...

it depends on the classes...

what do you mean nearly all cars in drag racing are turbo?

maybe that was a bit of a sweeping explanation...but
camrydore...turbo
400 and watever cubic inch torana running very quick times, twins out the bonnet
went to jamboree, almost everything turbo.

i wonder what would happen if they removed the yokel-like rules of SC only and mech injection....

with the advent of good ball bearing turbos they have been able to cop the heat and extreme conditions in the engine bays of drag cars, and thus are becoming more prominent.
give it 5 years and see whats happening

[Earlyrolla]

There is a lot more to drag racing and the justification behind decisions for each class.

Both turbocharging and supercharging are allowed in many of the classes. The ruling is generally either mechanical (supercharger/turbocharger) OR chemical (nitrous oxide) supercharging. Superchargers designed for drag cars are reasonably efficient (a lot more than an SC14!). Supercharging provides instant throttle response and ease of tuning with mechanical injection.

Traditionally the fuel and ignition could not be controlled electronically or more specifically no closed loop control/feedback. With the introduction of new technology ANDRA has introduced new classes to cater for vehicles fitted with engine management systems. Ultimately as the sport progresses the number of vehicles with engine management systems and turbocharging will increase.

For higher boost levels the Eaton M90 would be too small for the 1UZ remembering that the M90 is 1.484L/rev, i.e. not that much bigger than the SC14.

A better fit would be the Eaton M112 at 1.857L/rev. Or even better again, one of the new Eaton TVS superchargers The M112 is much easier and cheaper to source.

The adiabatic efficiency for the new TVS superchargers is pretty damned close to Lysholm type superchargers. Compare a Lysholm or a TVS peak efficiency to a turbocharger compressor peak efficiency and you will see they are also very close. E.g. 75% for the TVS supercharger to 79% for a GT35R turbo.

Any sort of forced induction will benefit from intercooling. Obviously with higher boost levels, the potential benefit from intercooling will be greater.

Not sure how low in the engine bay the 1UZ sits but I am guessing trying to sandwich an intercooler between the supercharger and engine might result in bonnet clearance issues Just means it is time for a custom bonnet bulge

[oldcorollas]

the eaton site is getting more TVS info up.. are they available yet?

[JustenGT8]

Twin SCs yes, but single SC vs TT im not so sure, theres quite a few Soarer guys running various twinscrew setups now.

Regardless, im doing research at the moment into a TT setup in my Soarer with two small turbos mounted low down towards the rear of the engine. It seems everyone who's bolted turbos onto an unopened 1UZ has had pretty spectacular results (you included!), basically the power of a serious 2JZ setup but with unmatched driveability at the same time.

But any FI setup if done right isnt cheap even supercharging so i figure might as well go TT, the difference in $ is really academic, its just the packaging and space constraints which need to be overcome first....

For sure. Still not cheap, (single turbo would win again ) but for most UZ powered cars the single SC is an easier proposition to package. The SC potentially provides enough grunt for most, particularly street performance and i'd have no quams SCing a daily driver Soarer for example.

[Wildsupra]

Which is cheaper we'll never know then eh because i'm positive a simple TT setup would be easier one of those agree to disagree i think? Alot more turbo setups out there than twin SCs though

The twin turbo option is going to be difficult due to the lack of space along side the manifolds once installed in the JZA80, i would have to bring the turbos forward to give clearance which would increase lag due to manifold length before reaching the turbo.

Plus single turbo 1uz JZA80's have been done at least twice in WA that im aware of, i'd like to keep it a bit different.

Also going SC i can get the motor in and get the car engineered with the 1uz then start adding s/c after wards without having to remove motor and make manifolds etc.

I need to go look at some superchargers to get an idea on size and setup, and how i go about intercooling also. Wots a decent sized twin screw worth these days??
I want the ability to run up to 20psi, and yeah i will be using some sort of piggy back computer to look after fuel etc above 7psi

Cheers
Matty

[MWP]

From the summer nats piccy thread:

[JustenGT8]

The twin turbo option is going to be difficult due to the lack of space along side the manifolds once installed in the JZA80, i would have to bring the turbos forward to give clearance which would increase lag due to manifold length before reaching the turbo.

Plus single turbo 1uz JZA80's have been done at least twice in WA that im aware of, i'd like to keep it a bit different.

Also going SC i can get the motor in and get the car engineered with the 1uz then start adding s/c after wards without having to remove motor and make manifolds etc.

I need to go look at some superchargers to get an idea on size and setup, and how i go about intercooling also. Wots a decent sized twin screw worth these days??
I want the ability to run up to 20psi, and yeah i will be using some sort of piggy back computer to look after fuel etc above 7psi

Cheers
Matty

20psi...that's big boost for a roots SC.....too much boost for stock internals so i assume you have forgies in mind? maybe rods needed too? Once you have gone to that effort then make sure your piggy back is damn good and have the thing run fuel/ignition all the time. I'd be wiring an Autronic or equiv. I assume you want the stock ECU in place for AC, auto etc?

[Sciflyer]

Matty have a look around the Soarercentral forums, as i said there are at least a dozen or so guys running superchargers on thier 1uz's there and the z30 Soarer engine bay is similar to the z80 Supra

The reason im leaning towards TT rather than SC is because you cant run anything other than mild boost without intercooling, and to do that on a Eaton style SC means either a front-mount with a shitload of awkward pipework to it or a water-air cooler which means it aint all gonna fit under the bonnet....

A turbo or TT setup on the other hand lends itself to intercooling a bit better with the confines of the engine bay on a z80 Supra/z30 Soarer although dont get me wrong its still a tough ask.

Also as Justen said, 20psi is getting pretty serious.... do you have any idea how much power you want to make before throwing boost figures around because from the experience of a few people now it looks like you can get around 450-480rwhp on an *unopened* 1uz before internals start dying and it doesnt take anywhere near 20psi to reach that

[Earlyrolla]

the eaton site is getting more TVS info up.. are they available yet?

Not that I am aware of yet. I have been keeping an eye on the Harrop site as they are the Australian contact for Eaton.

20PSI, has someone been beaten by too many commodores and falcons lately

Autorotor, bit cheaper than a Sprintex if you want to go twin screw:
http://sprintex.com.au/Opcon_Autorotor.asp

[Wildsupra]

Matty have a look around the Soarercentral forums, as i said there are at least a dozen or so guys running superchargers on thier 1uz's there and the z30 Soarer engine bay is similar to the z80 Supra

The reason im leaning towards TT rather than SC is because you cant run anything other than mild boost without intercooling, and to do that on a Eaton style SC means either a front-mount with a shitload of awkward pipework to it or a water-air cooler which means it aint all gonna fit under the bonnet....

A turbo or TT setup on the other hand lends itself to intercooling a bit better with the confines of the engine bay on a z80 Supra/z30 Soarer although dont get me wrong its still a tough ask.

Also as Justen said, 20psi is getting pretty serious.... do you have any idea how much power you want to make before throwing boost figures around because from the experience of a few people now it looks like you can get around 450-480rwhp on an *unopened* 1uz before internals start dying and it doesnt take anywhere near 20psi to reach that

Im throwing up the idea of 20 psi as the max i would want to run, ive been told much different information to what you have said, a few people i have spoken to have claimed that 600-650hp is achievable on stock internals, obviously not going to last forever, but the cost of a 1UZ is minimal, so its going to be worth a try i guess it would also depend on a few things like the tune and efficiency etc etc.

I'l be using the UZZ30 halfcut etc as yes they are VERY similar to the JZA80 bay.
I'l be retaining stock ecu for Auto control as mentioned and also all the other things stock computers never have trouble with, e.g. idle, off boost performance, starting, etc etc piggy back will simply take over above 6 or 7psi. (and when i say piggy back i mean microtech or something, but only wired in as an additional controller not stand alone) I know of one person making 320hp @ the wheels on 9-10psi non intercooled, so i would hope 20psi on a semi efficient setup would yield somewhere between 500-600hp roughly.

I realise intercooling will be my biggest hassle, but hey i know it was never gunna be easy.

Cheers
Matty

[IN 05 NT]

bringing up the dead for further discussion

[Sciflyer]

Well he sold the halfcut so i dont think thats happening any more...

Brand new GT2560R ball-bearing Garratts are down to $1k....

[Wildsupra]

yep halfcut is sold, no longer going ahead, took a big side step and then another side step and now climbed over the fence to a whole new path......