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Location:
Adelaide
Registered:
June 2002
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 4.5 Litre Crown is alive
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Tue, 11 June 2002 03:26
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Got the animal started on the weekend. It was running at 2500 rpm at idle at first, so I figured that there was a vacum line off somewhere. Had a look-yep, I'd missed plugging up one of the redundant factory takeoff points. It still ran at about 2000-so I pulled the idle valve off. Looks like the toyota ones are open when there is no power-so we just put a rubber grommet between the piston and seat to plug it up. Put on the radiator-filled it up, and turned the key, and it settled down to silky smooth 590-650 rpm idle. Awesome. We jacked it up to test the trans-ie run it through all the gears and see if there was any vibrations present-none were though! It has the bark of a hemi six, with the volume of noise ecpected from such a big motor and the twincam buzzy sound when the throttle is blipped. Sounds fu*cken tough. The autronic was a dream to deal with during the startup process too-no complaints at all. Next thing is to hook up the exhaust (for the neighbours) and maybe get a day permit either this or next weekend. (Oh yeah-and a bonnet and a scoop)
Next comes the turbo...
Sean
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 4.5 Litre Crown is alive
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Tue, 11 June 2002 04:04
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Excellent Sean, should be horrific with the T04.
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Location:
Melbourne
Registered:
May 2002
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Re: 4.5 Litre Crown is alive
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Tue, 11 June 2002 06:44
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You are truly mad. What is the stock c/r of this engine, or have you lost the plot completly and gone for forgies? What do you aim to get, Kw's, out of such a daring venture? Why a Crown? Good luck!
Malkom
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Location:
Adelaide
Registered:
June 2002
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Re: 4.5 Litre Crown is alive
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Tue, 11 June 2002 07:47
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Malkom, to answer your last question first, because I can, because no one has done it before, because the MS-75 2-door looks relatively good (relative to the 4 door) and because the car is pretty heavy.
I haven't bothered with forgies because the level of metallurgical advancement used in modern engines is so good that late model stock pistons are commony capable of massive boost with no troubles.
The CR is 9:1, giving good response off boost, and still capable of dealing with reasonable boost without a comp drop (using good fuel of course) I know of a certain Landcrusher running 22 psi without a comp drop.
I'm not really chasing a massive power number, but more a huge torque reading. My friends 250 turbo cortina runs 11 psi, makes 150 rwkw, redlines at 4800-but runs 12.1 sec 1/4.
I wont quote a number, as I honestly have no idea how it will respond to the turbo-but I'm guessing pretty good at this stage.
Cheers
Sean
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Location:
Sydney
Registered:
June 2002
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Re: 4.5 Litre Crown is alive
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Tue, 11 June 2002 08:42
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Nice one, good to see people attempting unique conversions.
If it's anything like the 1uz, you'll probably be quite happy with it as is. For the time being anyway 
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 4.5 Litre Crown is alive
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Tue, 11 June 2002 10:59
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And the level of metallurgy is especially good when you are talking about modern Toyota engines
Sounds like an awesome car mate. Good on you. Have you got any more pics since the ones you put on the old forums?
I've heard a lot of people complain about the Autronic being hard to use. Have you found this to be tha case? You seem to speak highly of it so I'm guessing not. If you don't mind me asking, how much did the Autronic system set you back? Have you used the auto-tune feature?
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Location:
Adelaide
Registered:
June 2002
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Re: 4.5 Litre Crown is alive
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Wed, 12 June 2002 03:32
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Frank, the autronic set me back $1620. That got me the ECU, flying lead kit (meaning a loom that plugs into the ECU that is a mass of coloured wires with no plugs on the end. You also get the Autronic air temp sensor that is a custom unit built by them and a GM temp sensor. It also has the MAP sensor internal to the ECU. All that you need to do is use the wiring diagram and solder all the Autronic wires to the injector plugs and the throttle position sensor that came with the motor (most manufacturers throttle pos. sensors will work with the system) Also, you set up the dizzy according to the autronic specs (essentially meaning the sensors in the dizzy are in the right position) If you have a magnetic pick up dizzy or crank angle sensor you need a rluctor box to convert the signal to a square wave form for the autronic to read ($80), but if its hall effect they wire straight up to the computer.
There are a few other wires to hook up ie power, switched power, ground, fuel pump power etc, but thats all easy stuff.
Once its all wired up, you can begin to attempt to start it. The nice thing the autronic has is an 'overall fuel calibration multipier', which in english means that by increasing the overall number, you increase ALL the injector values. ie, if you have the overall fuel cal number set at 10, the fuel delivery at every point of the fuel maps is double what it would be if it was set to 5. Next trick is to roughly calculate the fuel cal number as described in the manual (piss easy) then remove a few points off it. Try to start it, and if it kicks and dies, increase the overall number a bit and try again. Do this a few times and it'll fire up-then adjust away-it's really very easy. The main drama seems to be that until Ray Hall Turbos in QLD (www.turbofast.com.au) started being involved with autronic, there wasn't really a manual for it. Now, if you purchase the autronic from Ray Hall, the price is fixed and it comes with a 100 page manual, and Ray Hall is very helpful with questions. The unit are 1800, but when I bought two, I got a 10% discount-which made them 1620 each, and I believe that if you buy more in a job lot, the discount gets bigger.
As for the auto tune-it was only another 240(about-from memory) for the chip, but you need the autronic oxy sensor and readout I believe, which is another few hundred, although you would save the amount of cash in dyno tunes in two or three trips tp the rollers anyway. The main reason I didn't get it was that tuning the car is fun! The autonic will interface and readout with most factory sensors, so you can tune it on the road yourself anyway.
The one thing you need to buy (that I forgot to mention) is a crappy old laptop to interface with the unit. The one I use cost $100. The battery died a while ago, so now we just have a couple of alligator clips that go to the car battery (the computer batt pack was about 12 V) and bingo-we can tune for as
long as we like.
I haven't got any new pics, as it still looks much the same in the bay, but now it runs. Once it has a hood and a scoop and is relatively re-assembled I'll post some more-I'll also put up the dyno results when I go down for the non-turbo baseline reading (1/4 mile baseline to follow)
Take it easy
Sean
[Updated on: Wed, 12 June 2002 03:34]
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 4.5 Litre Crown is alive
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Wed, 12 June 2002 10:59
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Thanks heaps for that dude, that was an awesome description. As for the pics, I had to go look at what an MS75 actually looks like The coupe one is yours right? 
Looks like I'll have to get a couple of people to buy Autronics with me. They seem pretty good. Thanks again.
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