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Location:
Sydney
Registered:
May 2002
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4AGE Experts Please! Ill buy you a beer! :)
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Tue, 01 July 2003 01:45
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ok,
Would a Jap spec Map sensored Blue top with tvis computer run a 100kw ae92 motor without T-Vis?
As stated.. Whoever can answer this gets beer... 
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Location:
Canberra
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Tue, 01 July 2003 01:51
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It should run, if you change over all the sensors. The mapping won't be spot on, but, it would be OK.
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Location:
Brisbane / Gold Coast
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Tue, 01 July 2003 08:17
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Yes, provided you swap the injectors over.
And what Ben said ... (Though I don't think the sensors are that different ... ?)
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Club Member
Location:
sydney
Registered:
May 2002
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Location:
Melbourne, Australia
Registered:
July 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Tue, 01 July 2003 23:42
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Im running an 86KW 4AGE in my sprinter using an 86KW ECU, and mine revs out to 8000RPM. Whats the story there?
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Wed, 02 July 2003 00:33
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Possibly because your ECU came from an RWD 4AGE?
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Wed, 02 July 2003 08:54
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My brothers car blew up a tvis motor last year, small fire from the oil pissing out the sump, apparently had something to do with no.4 conrod breaking. 
Anyways we needed to get it back on the road quick smart, a trip to the wreckers and a smallport was bought along with another engine loom. the other one perished in the fire.
Tvis motor out, smallport in, all the sensors were swapped to tvis ones. We were going to run the smallport injectors, but i'm lazy and didn't feel like changing the plug ends on the loom so we used tvis injectors.
So basically its a smallport running totally on tvis brain sensors and injectors. Car has been running in this config for about a year, doesn't ping, power is definately better than a tvis motor. This car get's flogged, third gearbox now.
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Club Member
Location:
sydney
Registered:
May 2002
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Location:
Melbourne
Registered:
May 2002
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 Re: 4AGE Experts Please! Ill buy you a beer! :)
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Thu, 03 July 2003 07:14
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Me too for those 4AGE experts!
My red top MAP sensored (AE92) 4AGE is running fairly ordinarily and using heaps of fuel.
I suspect it's because I've installed HKS "272" cams. Lumpy idle, revving up and down while idling, running rich at idle, nothing below 3000 etc etc.
Apart from a new ECU what can I do to make this thing more useable?
Do I need bigger injectors? the thing misses when you put the foot down from rest and when moving.
(I've got a cold air intake, filter, but factory cast iron manifold for what that's worth).
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Thu, 03 July 2003 09:51
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Methinks the cams is just too damned big for the stock box - having stuff all vacuum at idle/cruise means that it's gonna run bulk rich most of the time, hench the consumption and lack of response. You could try an interceptor, or do it properly and install an aftermarket box 
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Thu, 03 July 2003 10:43
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Maybe a fiddle with the cam timing might help things a tiny bit. I've always thought that 272s were the largest you could run on a stock computer. A intercepter box would make it smooth again, but fitted and tuned you're halfway towards full management anyway.
There are cheap ways of fooling the map sensor, but i'm not sure what it might do to part throttle response. Wide open throttle goes straight to throttle sensor and rpms, ignoring the MAP sensor.
A 4AGE with a stock computer will run without the TPS connected, but won't run without the MAP sensor connected. One thing I have thought of is to 'give' the computer what it wants to see when the TPS is closed and in the IDL position, through some transistors and voltage regulators. I'm not sure if it would work, but if someone needs a project.
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Club Member
Location:
sydney
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Thu, 03 July 2003 10:52
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From what i have seen the 272 should run without too much drama on the stock ecu, vacume to the MAP may be an issue depending on how much overlap you run, have you had the cams dyno tuned?? maybe a professional tune will solve all your problems if you havent done that allready, Ill assume that you havent had it tuned from you saying youre idle is lumpy, I recently was fortunate enough to play with a 265 cam and the engine ( after a lot of playing around) ran almost dead smooth which was quite a suprise , and it was on a factory ecu.
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE Experts Please! Ill buy you a beer! :)
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Thu, 03 July 2003 23:33
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thanks for your comments re the cams fellas.
I've had the cams timed and the shims adjusted professionally. The thing does seem to be running rich right the way across the range.
One thing I'm going to try is a variable resistor on the water temperature sensor to drop the mixture off at idle, but as I understand it this will have a decreasing effect as revs rise.
(I've read about this in the Toyota Performance Handbook FWIW).
Maybe a similar trick would work for the MAP sensor???
I've also got adjustable cam wheels, so would backing off the overlap help?
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