TRD supercharger question

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bay_area4runner

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I'm planning to buy a super charger for my 3rd gen and I've come across a dilemma. From videos I've seen and threads I've read, I found that you can slap on a super charger on the stock fuel system without needing any type of tune or fuel system like the urd 7th injector.

I was wondering if anyone has this, just a stock 3.4 with a super charger and the stock fuel system. I'm in the Bay Area do elevation isn't much of a problem but I'm hoping that if I can run my stock 3.4 on a super charger, then I'll buy it asap and later on do the urd 7th injector.

Can anyone help me out? Who's got a stock 3rd gen with a super charger?

P.S preferably the 2nd gen super charger lol
 
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Literally just picked my new 4Runner up today, and it has the 2nd gen supercharger installed with no fueling and runs great! Quite the noticeable difference.
 
i recently installed sc w/o any additional mods. Change is noticeable but it's not much. I'm leaning heavily towards getting some type of tuning (most likely URD 7th injector) as next step. Only thing that concerns me is the smog check since it's not legal here in cali.
 
bay_area4runner said:
I'm planning to buy a super charger for my 3rd gen and I've come across a dilemma. From videos I've seen and threads I've read, I found that you can slap on a super charger on the stock fuel system without needing any type of tune or fuel system like the urd 7th injector.

I was wondering if anyone has this, just a stock 3.4 with a super charger and the stock fuel system. I'm in the Bay Area do elevation isn't much of a problem but I'm hoping that if I can run my stock 3.4 on a super charger, then I'll buy it asap and later on do the urd 7th injector.

Can anyone help me out? Who's got a stock 3rd gen with a super charger?

P.S preferably the 2nd gen super charger lol
Click to expand...

I'm running stock charger with stock fuel and runs fine from what I can hear. I'm over 4k ft elevation so I don't boost as much as sea level. A lot of people run the same combination. Stock charger wasn't the wow factor for me, even with 4.88 gears it's isn't something to talk about. It feels like where a stock 4runner should be at. I'm certainly not a stock rig though. What tires are you running? You lifted?
 
slimboiphat said:
i recently installed sc w/o any additional mods. Change is noticeable but it's not much. I'm leaning heavily towards getting some type of tuning (most likely URD 7th injector) as next step. Only thing that concerns me is the smog check since it's not legal here in cali.
Click to expand...

I was concerned about the Cali emissions too, I wonder if you could tune it where it can be legal?
 
slimboiphat said:
i recently installed sc w/o any additional mods. Change is noticeable but it's not much. I'm leaning heavily towards getting some type of tuning (most likely URD 7th injector) as next step. Only thing that concerns me is the smog check since it's not legal here in cali.
Click to expand...

Yeah, smog laws are tricky. So far the only things I have on it have CARB approval (Supercharger and Airaid intake).

2nd Gen black supercharger currently with no fuel mods. Works just fine. Toyota did design it you know, they probably know what they are doing on their own vehicles if I'd take a guess.
 
I have a first gen S/C with stock fuel system and runs fine.
As far as I know the first and second gens aren't different in performance, only look and how their setup. (Correct me if I'm wrong)
 
Put the S/C on mine at 210K miles without any fuel mods. Living in the midwest we don't have a lot of elevation. Haven't had a single problem. Agree with others that it's the amount of power it should have come with standard. But definitely worthwhile. Next is bigger tires though, but no mountain passes to bog it down
 
"Running fine" and "running far too lean" are being used synonymously in this thread. Interesting.

For those of you without fuel mods that are "running fine"... How are your fuel trims under boost?
 
A.Wilson013 said:
"Running fine" and "running far too lean" are being used synonymously in this thread. Interesting.

For those of you without fuel mods that are "running fine"... How are your fuel trims under boost?
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I admit that don't know exactly what they are because I haven't installed the proper equipment to measure. I can't imagine TRD offering these from the dealership if the fuel system wasn't up to par in stock form. I don't think they would would offer these if they knew that they would run lean. I bought a runner that had a supercharger on for 140k miles with no fuel mods and it still runs like new. I'm going to get the oil analyzed and dig a little deeper with the condition.

Please correct me if I'm wrong, is there common knowledge that these chargers run lean in stock form, or is it here say? I'm genuinely curious. I've read many people running chargers 100k Miles and never had any lean issues. Nearly every charged 4runner I see doesn't have any indication of fuel mods.

Did you experience this first hand with a stock 4runner? I have nothing against fuel mods, and more than likely will get them when I go to a smaller pulley, and perhaps I'm a bit ignorant with the situation, but I think it can go the other way as well.
 
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There seems to be a lot of variables because they are all considered high mileage engines. There's so many things that could be different about the engine's condition and whether or not there's vacuum leaks, injector inefficiences, old sensors, etc. Also, gen 1's reportedly create slightly more boost (no hard evidence though) and might require more fuel.

My engine is in the best shape I can possible get it, runs very strong for 200k+ miles. My fuel trims are high though, under boost with the air mods I've done they are pretty much tapped out. I do not have any high RPM pinging though, which is good. Running the ECT Power button full time has eliminated the little low RPM pinging I did get.

I monitor my fuel trims using Torque Pro and a bluetooth adapter, it's pretty darn good for paying a total of $30. I do not know my AFR's though.
 
I bought a 1998 4runner that has had the Gen 2(black) blower on it since it was purchased new. It had 150k miles on it and was owned by the same woman since new. I have owned many vehicles over the years with blowers and turbos so I thought it would be fun to have a sleeper 4runner.

It runs good for a 4runner, not fast by any means, but I decided to put a boost gauge/wideband on it. Holy smokes, it runs lean(14:1) except at WOT, where it runs less lean - 13:1 maybe 12.8. It makes right at 8 psi. Couple that with the IAT sensor being in the MAF and I was thinking it would blow anytime because the IATs never show over ambient temp +15 degrees on the Ultragauge. The IATs at the blower discharge are probably 40-50 degrees higher. But it hasn't blown in 18 years and 150k miles. The engines must be fairly low compression to survive.

So, I am putting some 440cc injectors on it along with an AEM FIC-6 and the 2.1 pulley. I rebuilt the blower snout and sent the case off to High Speed Labs to have them change out the needle bearings. Should have it all back this week and I can get it all put back together and see how it runs.

So, yes these motors seem to tolerate lean conditions in stock configuration but I can tell you that I have a supercharged Chevy truck as well and if I ever see 13:1 on the wideband at any rpm it will be a bad day.
 
These engines really can take a beating. They are nothing flashy but at the end of the day, no matter what you do to them they keep running. Low oil, high temps, bad gas, etc. they just keep on running. Perhaps on other makes and models these issues might be of concern but these engines on the 4Runners are pretty much bulletproof.
 
This is the first time I've ever had a supercharger on a vehicle so I'm learning as I go. Being at a higher elevation has postponed my motavation for dipping into fuel mods. She runs great as is, but admittedly it's hard to say if you don't have proper tools to monitor it.

It's similar to people by passing the tranny cooler for a external cooler and not having a temp gauge to monitor if it's working or not. If you truly want to know if you need fuel mods, you need the proper gauges to measure what is going on.
 
Toy2play said:
I admit that don't know exactly what they are because I haven't installed the proper equipment to measure. I can't imagine TRD offering these from the dealership if the fuel system wasn't up to par in stock form. I don't think they would would offer these if they knew that they would run lean. I bought a runner that had a supercharger on for 140k miles with no fuel mods and it still runs like new. I'm going to get the oil analyzed and dig a little deeper with the condition.

Please correct me if I'm wrong, is there common knowledge that these chargers run lean in stock form, or is it here say? I'm genuinely curious. I've read many people running chargers 100k Miles and never had any lean issues. Nearly every charged 4runner I see doesn't have any indication of fuel mods.

Did you experience this first hand with a stock 4runner? I have nothing against fuel mods, and more than likely will get them when I go to a smaller pulley, and perhaps I'm a bit ignorant with the situation, but I think it can go the other way as well.
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They run lean. At higher elevations you may be "ok."

Just about any N/A car or truck, and modern ECU, converted to FI is going to run lean.

This engine wasn't built for FI. Therefore it's tuned from the factory to be NA. The fuel system and ECU were not meant for FI.

Can you fun it without mods? Yes.

Is it going to run lean? Yes.

TRD used to produce their own 7th injector and larger pulley, for this very reason.
 
slimboiphat said:
i recently installed sc w/o any additional mods. Change is noticeable but it's not much. I'm leaning heavily towards getting some type of tuning (most likely URD 7th injector) as next step. Only thing that concerns me is the smog check since it's not legal here in cali.
Click to expand...

bay_area4runner said:
I was concerned about the Cali emissions too, I wonder if you could tune it where it can be legal?
Click to expand...

i just smoged my 4runner with the S/C and urd 7th injector. passed with flying colors. doesnt hurt that i have the Carb Decal for the TRD S/C and TRD 7th Injector displayed on the vehicle during time of smog.

gamefreakgc said:
Yeah, smog laws are tricky. So far the only things I have on it have CARB approval (Supercharger and Airaid intake).

2nd Gen black supercharger currently with no fuel mods. Works just fine. Toyota did design it you know, they probably know what they are doing on their own vehicles if I'd take a guess.
Click to expand...

Toyota Did not design the S/C so get your facts Straight Sir. it Was Made By Magnuson. any yes they run lean. this is why i went with the 7th Injector. i was pinging Part Throttle and uphill. Even the 4.7 guys have this issue on the tundras and Sequoias.
 
SIKHILUXSURF said:
Toyota Did not design the S/C so get your facts Straight Sir. it Was Made By Magnuson. any yes they run lean. this is why i went with the 7th Injector. i was pinging Part Throttle and uphill. Even the 4.7 guys have this issue on the tundras and Sequoias.
Click to expand...

All the "guts" of superchargers are made by companies like Magnussen, Whipple, Eaton, etc. But TRD designed the pulley size, output, PSI, etc. to be specifically made for a 5VZ-FE engine.

Saying that the TRD supercharger was not designed by Toyota but by Magnussen is like saying that the 4Runner wasn't designed by Toyota but DENSO because it has DENSO parts in it.
 
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