Carburated MP112 1UZFE?

[Scottl]

Hi,

I'd like your advice on the following:

http://cgi.ebay.com/ebaymotors/MP11...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I'll eventually be building a 1UZFE for my Off-road competition car, I've planned on Supercharging her with a MP112 Supercharger. I just came across the above ebay ad and it's taken my eye. I've got a few questions which will help me make my mind on whether to go EFI or Carb.

1. How would I go about running a Carbed S/C on the 1UZFE?

2. Am I advantageous in doing this at all (Mainly to remove the hassle of computer systems and tuning)

3. Is the 1UZFE prone to ECU/EFI faults?

4. If I go the EFI route can I use the stock ECU with a TH400 gearbox and MP112 supercharger?

Thanks for your invaluable input guys.

Scott.

 

[JustenGT8]

It's a long way from A - buying an Ebay SC, to B - a running SC 1UZ.

If something as fundamental as wiring and running an ECU is seen as a 'hassle' perhaps you should be thinking about something a bit less 'challenging' for you?

 

[Scottl]

Hi Justen,

Thanks for your input, A - eBay just happens to be where I can pick a Carb'd MP112 up cheap. (I Don't even own a 1UZFE bloody engine yet mate, just in the research/window shopping/bargain hunting stage) B - It's a long and challenging way I'm sure and I plan to take it slow and learn as much as I can on the way, which Is why I joined this forum - to learn.

Now to explain/defend myself, The vehicle I'm currently building will be competing in events like the Australasian Safari, Desert Finke Race, Hyden 450, etc, I then plan to ship the car to Europe and tour/camp off-road for 12-18 months, Which after that I will retire the vehicle into my back shed, If it makes it that far. Most of the work, inlcuding fabrication and engine building will happen in my back shed.

The less things to go wrong the better, ie water in the electrics, shuts down whole bloody engine, race lost. Minor loss of torque, hp and economy has been anticipated, please let me know if it's a major not minor loss...

As I understand from what I have read the 1UZFE engine has a quiet technical EFI and ECU system which link the auto gearbox aswell.

I've found an old thread called "1UZFE + carburator = ?" where a member "MadPhil" who races stockcar who used a system from http://www.electromotive-inc.com

Here's what he posted:


"I run an electromotive HPX unit on my stockcar with a 600cfm Holley.
http://www.electromotive-inc.com

I replaced the standard crank trigger wheel with the HPX 3.5" wheel and mounted the HPX trigger in the same mount as the original Toyota.
I had a set of leads made with run to the rear of the engine.

I ripped off all the wiring and sensors from the engine. Now with HPX I only have 3 wires to control the whole ignition, + and - from the battery and 1 wire which goes to the crank trigger sensor. Its brillant.

The main unit has 4 coils and a control panel to adjust cranking advance, advance to 3000, and advance and retard for tuning up to 8000rpm.
Oh and it has a built in adjustable rev limiter.

At the time I think they were only $800US

Cheers
Phil

http://www.marxmotorsport.com"

This is the sort of system I'm looking for, But would love the answers of my first questions.

I'd like not to defend my self from now on Justen mate, I'm here to learn, Thanks for your understanding.

Input?

 

[cribbj]

Scott, I've run the 1UZ carbureted in naturally aspirated mode, and with a Ford EDIS8 ignition setup (changing the stock Toyota trigger wheel to a 36-1 tooth).

Also ran the same setup, but with 8 COP's in waste spark, fired from a pair of EDIS8's in parallel. I've got photos of the setup in my signature thread if you're curious. Look way back in the beginning.

It ran great both times, and I see no reason why a similar setup wouldn't work for you with the 'charger.

 

[-Nemesis-]

From what I hear elsewhere carbied 1UZ's are popular over in NZ, in their stock cars and boats etc (big power and big revs)

Though I don't think there's much reference to it on here.

The electrics of the 1UZ seems quiet intricate thanks to the donor car and all it's gadgets (massive harness.) If you went EFI and for the vehicle you're building (what btw?) I reckon go a quality aftermarket ECU and make a harness for what you need. There should only be a hand full of wires to run the whole engine, and you can dump the air flow meter which is probably one of the only unreliable electrical bits.

 

[JustenGT8]

It needs electrics period so no escaping that. Just do the ECU install well and you'll have less problems than trying to keep a carbie in tune.

The loss of mid range torque, throttle response and general driveability...not to mention economy..by going carbie will be significant.

A good after market ECU will cost you less than setting up a carbie anyways.

 

[Zuffen]

I ran the Australian Safari in a carburetted vehicle. We had more fuel problems than you could poke a stick at. Still won the National Division but only by driving in a pool of fuel for 5 days.

As Justen said do a good stock instal and it will run forever. If you want to be rid of the AFM fit a quality aftermarket ECU and it will be just as reliable.

All the sensors on the engine will work under water so if the ECU is mounted above your head and you can hold your breath (and feed the engine air) you can drive it wherever you want. Not that I would recommend it.

If I was building a vehicle for the use you say it would definitely be an EFI vehicle for a multitude of reasons.

 

[XR8tt]

I must say the stock cars make near 500 h.p n/a with ONE carb and they hit each other very hard and keep going.. In N.Z there would be some development with carb 1UZ's.. It's the rules they run under..
Been that way for 40 years..

 

[Scottl]

I ran the Australian Safari in a carburetted vehicle. We had more fuel problems than you could poke a stick at. Still won the National Division but only by driving in a pool of fuel for 5 days.

As Justen said do a good stock instal and it will run forever. If you want to be rid of the AFM fit a quality aftermarket ECU and it will be just as reliable.

All the sensors on the engine will work under water so if the ECU is mounted above your head and you can hold your breath (and feed the engine air) you can drive it wherever you want. Not that I would recommend it.

If I was building a vehicle for the use you say it would definitely be an EFI vehicle for a multitude of reasons.

Hi Zuffen,

And thanks for your invaluable reply, This is the sort of thing I was wanting to hear, from someone who had been there done that, There's no better advice than first hand.

- The idea of using a carby was to reduce the amount of thing's to go wrong while booting through the outback. I looked into a few systems that incorporated minimal wiring and sensors, one being the Ford EDIS8 system thanks to cribbj's suggestion. Now the more research I've done, There aren't many Aus Off road racers still running carbs for the same "reliabilty" issues I was worried about with Fuel injection.

If what you say is correct and the engine sensors are fine underwater, then that's that. EFI It will stay, I'll be using an aftermarket ECU, MP112, Turbo 400 gearbox w/ manual valve body and paddle shifts.

I thank everyone for there input, I think we can consider this thread closed.

:Flush: