4A-FE AE92 dyno?

[awdark]

Does anyone have a dyno graph for the engine?

[EKam]

What do you need to know?

As with most Toyota engines with FE head, HP drops a lot right after hitting 5K range and torque starts dropping at 4K.

Sorry I don't have the graph for that engine.

[awdark]

Really?? According to what I pulled off of autotrader.com (link if it doesn't expire) for a 1991 Toyota Corolla sedan, these are the peak rpms:
* Horsepower: 102 @ 5800rpm
* Torque: 101 @ 4800rpm
Is the power drop due to the restrictive intake box? Maybe I should invest in a CAI.

In particular, I'm wondering, provided I'm willing to shift past redline up to the fuel cut, if I would be able to gain more power by shifting that late than I would if I were in the next gear (since I have a 3spd automatic with looonggggg gearing). I have no tach, but it seems that the auto tranny is shifting from 1st->2nd at around 4725 under full acceleration, which is actually optimal if your figures are correct and I've been adding extra wear bringing up the revs so high for nothing...

[ratboycom]

i usually shift about 5900 but thats with a 5 speed, in my 92, really taking it up to the fuel cut will not help at all because if the peak is about 6k then all you are doing is stressing the piss out of the motor, really the best thing to do is get rid of the 3 speed its built for economy and not speed (slush box)

[automatic]

My '92 will shift into 3rd at 75-80, right around 6K I figure, puts the engine rpms in a good place after the shift. The engine will be the last thing to go on this car, and it has a freshly rebuilt auto.
That auto does leave you looking for a bumper to grab onto some of the time, but then there's also a couple of good "kill zones" however.

I did a little headwork, foam motorcycle-type aircleaner, adjusted the fuel pressure, advanced the ignition timing, added another outlet to the muffler.

[toyotaspeed90]

Originally Posted by awdark

Really?? According to what I pulled off of autotrader.com (link if it doesn't expire) for a 1991 Toyota Corolla sedan, these are the peak rpms:
* Horsepower: 102 @ 5800rpm
* Torque: 101 @ 4800rpm
Is the power drop due to the restrictive intake box? Maybe I should invest in a CAI.

In particular, I'm wondering, provided I'm willing to shift past redline up to the fuel cut, if I would be able to gain more power by shifting that late than I would if I were in the next gear (since I have a 3spd automatic with looonggggg gearing). I have no tach, but it seems that the auto tranny is shifting from 1st->2nd at around 4725 under full acceleration, which is actually optimal if your figures are correct and I've been adding extra wear bringing up the revs so high for nothing...

those are NOT wheel hp figures...... that's rated at the crank.....

[MRQtwinturbo]

do u really need to dyno a car that only makes around 100hp........butt dyno should tell you that its slow....

[TekPhobia]

Originally Posted by awdark

Really?? According to what I pulled off of autotrader.com (link if it doesn't expire) for a 1991 Toyota Corolla sedan, these are the peak rpms:
* Horsepower: 102 @ 5800rpm
* Torque: 101 @ 4800rpm
Is the power drop due to the restrictive intake box? Maybe I should invest in a CAI.

Oh man...

The poor 4AFE doesn't breathe enough air for the airbox to be restrictive. Everyone has this idea that Toyota/Honda/etc. make their cars with restrictions and adding an air filter will some how free up extra HP that Toyota/Honda/etc were too stupid to realize.

You've already got a CAI, see behind your left headlamp?

Of course, if you remove the intake silencer, you'll get this deep sound under WOT that will equate to extra HP.

</rant>

-Tim

[Pineapple]

Shift at a rpm which after shift will put it at max torque RPM or a bit lower. My 3 spd auto shift at 6k all day long.
The FE's strength is torque. Any free flowing will remove that.
I have CAI, header, highflow catback with 2.25" pipe. On HWY it flies but it lagging on launch. It does respond really well when flooring it at any speed. It down shift and took off like a manual in 1/2 a sec.

[automatic]

The intake helped after removing the valve guide bosses from inside the intake ports, but stock, it probably wouldn't do a whole lot for you. You can't get your pinky finger past that point in the stock port.
I do my testing on this long, steep hill by my house, so far I'm up to 65 at the top, stock was barely 55.
Woohoo.
Got beat this AM by a new Matrix, I had some wheelspin, then hit the fuel cut on the 1-2 shift as the car wasn't fully warmed up yet. Would have been even otherwise.The freeway is a definately a more rewarding place to floor it.