ugh, i feel you there, its about 104 here right now. The only time ive ever had to let a sc cool down is during 1/4 races, heatsoaked = pulled timing = . Are you on the trd sc?

 

yea, turd s/c, 40 series slowmaster, and ported 5 inches post muffler

 

very nice setup! Makes me want to boosy my truck again oh and the trd sc is water-cooled stock just fyi

 

air to liquid cooled.. but do i need to worry about it overheated after that much driving? and do you know any performance chips lol

 

I wouldnt worry about over heating, youll have plenty of air going through both your radiator and your heat exchanger Here is food for thought. I had the 3.4L with an sc back in the day, even with raising boost i was still okay in the az heat (granted i had lots of ping, lol). I havent been in the performance chip game for awhile, but i had a chance to tune a sced xrunner with the map-ecu2 and we were able to knock out another 40hp on just a mild road tune. I know urd(ugh) was carrying a plug and play full standalone for the tacos that looked interesting, but i dont know if they still carry it.

 

would it be safe to downsize the pulley if i stayed in cooler climates to raise the boost?

 

just found urd's 2.825 pulley i want it 2psi boost at the max

 

Really should be asking these questions in the correct section, most of us here don't have a clue about your engine or what kind of mods it likes/needs.

 

this is a supercharger section right? its just the 05+ 4.0L new trd supercharger

 

No, this is the 96-2002/2004 toyota trucks section, you are looking for this section: https://www.yotatech.com/forums/f117/

We have totally different engines with different rules/methods for getting power. They will know a lot more about your engine in that section.

 

Modern supercharger systems are no worry in hot weather. The car's PCM will automatically dial back timing to compensate for higher intake air temps. No worries, just drive it and enjoy.

I've had mine on my 4Runner for over 4 years and it's the old 3.4L design that isn't even intercooled.

No issues.

 

thanks speedy, did you notice alot more power? even with the first gens?

 

Mine made 100 horse power more to the wheels than stock. So yeah...I noticed LOL.

 

wish i has a supercharge for my 3.4

 

I did finally get my URD 7th injector kit installed (minus the Walbro fuel pump), Denso IK22's gapped to 0.043" and a new Toyota fuel filter.

Wiring the AIC-T was pretty straight forward, it was the Innovate wideband that really created a mess of wires. The wideband controller needed switched power and ground, the gauge itself needed power and ground as well as a tap to a dash light for nighttime dimming and the oxygen sensor heater circuit needed a ground...basically the wiring goes three different directions leaving me with a quite a bit to try and loom behind the dash.


URD's preloaded map has helped the pinging quite a bit, however there's still some there I need to tune out. I understand I need to tune for fueling before timing, so I will leave the timing alone for the time-being.

My 4Runner is a manual transmission and things happen pretty quick in 1st and 2nd gear with AFRs at a scary mid-to-high 13s. In 3rd gear the AFRs stay in the low-13s until 4000 RPMs when they dip into the mid-12s to redline. I've only had the URD kit installed for 9 miles now, but it appears I need to up the fuel. I'm on the stock sc pulley. I haven't had the space to do a pull in 4th gear where the results will be more meaningful.

The AIC-T has a built-in boost enrichment function to lower AFRs to around 13.5:1 when in closed loop, but my 2000 model year is federal emissions and still has the narrowband sensor, so it looks like I cannot utilize that feature.

I read this thread in its entirety and I'm ready to play.

 

Get to work tuning, sounds like you need to add some fuel across the board. You want to start the tuning from the 11's and work your way leaner not the other way around. Good target AFR is 11.8:1 for pump gas alone.

For the ping under 3k rpm you will want to take some timing out, above 3k if the fueling is right it is not as big of a deal to get the timing right as the knock sensor is active.

 

It has been 9 miles since the battery was disconnected and the URD box was added, so I figure I will give it 20 miles or so to before I start messing with it. 11.8 is the number I had in mind too.

I think I will initially tune in 3rd gear since the top speed is a more reasonable 75 mph. This photo is from years ago when I was still NA, but it hits the speedlimiter in 4th before it hits redline:

 

That is the same way it is with the automatic, 3rd gear can only rev to around 5k.

I would add in some fuel pretty quick, it is not good at all to be that lean under WOT. Always better off starting off rich and leaning it out vs lean and adding fuel.

 

What Texas Ace said. Fatten her up then lean out as needed. I'm surprised cat over temp hasn't kicked in on some of your runs making it richer.

 

I had never heard of cat overtemp until I read all 44 pages of this thread, but I have not been beating on the truck...I have done about 3 third gear pulls just to see where I stand.

Has anyone made any observations about what a change in injector cell value of to 1.2 milliseconds versus 1.1 milliseconds does to AFR? In other words, for every increase in injector pulsewidth of 0.1, what does that equate to in AFR points? (In rough terms, of course.)

I pulled URD's preloaded map and the very first non-zero value (i.e. a value of 1.1) is not until 3000 RPMs and 4 psi. My max boost is 6 psi since I'm on the stock SC pulley and the largest value is a '1.2' from 4.5 psi to 6 psi between 4000 RPMs and redline. No wonder it's lean, I can't imagine values of 1.1 and 1.2 are doing much.