TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

I guess I’m frisky.

 

I think most of us are frisky here.

 

Pic of truck please. Details on weight adding mods especially. Tire size?

 

Yes. I have bumpers and full skids and I drove out of a 3rd gens life going up a hill not long ago.

 

The truck is heavy that’s for sure. I don’t expect it to be a race car but faster than a stock 3rd gen I would have hoped for. With the loss poor mpg lack of beating a 3rd gen. Trying to narrow it down. I just had @JustDSM sejd me a tune back to Tacoma MAF. Pulled the FJ tube for now. next will be trying stock S/C injectors. If that all pans out next would be cam gears or timing. Haven’t done full timing so hoping I don’t have to get that far into it. No backfiring, trucks not bogging but is not as preppy as the other 2.8 I drove last week.

I don’t have all my skids on but lots of steel, 315’s all the heavy crap that doesn’t do speed any favors. Truck is also regraded to 4.56 ( was done before I went to 315’s). I was thinking about pulling the rear tire and some stuff and see if it makes any difference.

I was thinking of finding a set of 17” wheels and stock tires and see how that pans out. I will surrender that these are some heavy tires.

 

What! That’s crazy talk! The only reason the 2.85 pulley was so popular was cause no one dared to cut the snout down. But once APR shaved one down with a CNC machine the game changed. And the APR 2.7/2.6 pulleys were born. The snout cutter came lil later and that really took off on XRU.

As for the 2.85 pulley being the best for these blowers? Sure for sea level and stock exhausts setups and cats. I agree with that.

But it’s a proven fact with actual data and dynos from the XRU days. That a 2.7 pulley or combo 2.85 and NST overdrive Kit put down more hp and torque through out all RPMs vs the 2.85 alone. The XRU community mostly had custom catless exhausts systems headers back for this proven data.

 

We both know that 2.8 pulleys for sea level is the most efficient that you will get out of this blower. This blower has been around for a while and I'm sure APR, URD and some of the other companies did some pertinent homework on this stuff to arrive to the pulley size of "2.85." There are other exterior mods you can do to get more juice out of the dragon, but at OE RPM and the size, they are perfect together. I cheat the 2.8 because there is more to the story than just a pulley swap alone including the near all NST OE sized lightweight pulley setup.

Going past sea level there are altitude variables which make running smaller pulley sizes the equal to running larger sizes at sea level. You just gotta spin the thing faster to make the same boost levels when you are up higher.

It's all bench racing to be honest. If you want to know what your real power level is, take it to the track. I'd love to race against some of you in like a "shootout" one day just for fun and for data collecting purposes.

 

Yep, you need gears man. Just looking at that thing makes me feel like going on a diet. Beautiful rig, but I bet it's damn heavy to boot!

 

They came up with 2.85 cause that was the smallest pulley swap you could do without cutting the TRD snout. There was no other science beyond that.

APR started the game for modifing the 4.0 TRD blower with the APRx1, exhaust cam gears, and 2.7 pulley. URD just started copying it over time.

 

Much like they copied the qwikchange pulley.

I don't know why there was such a fear to cutting the snout. Snout cutters had been available for the M90 since the early 2000s when the boosted Regal GS's, and GTP's were around.

 

Exactly!!

The TRD blower was very unique looking when it first came out in 2007 compared to all the other typical PD blowers. But APR CNCed one for the 2.7/2.6 pulleys about a year later. Remember nobody really knew what power levels the 1gr-fe could take on stock internals at the time either.

 

thanks but she is already running on 4.56 gears. Def wish I had 4.88. Its not perfect but def not running stock gearing thats for sure. 285's and 4.56 were perfect along with the OV tune at the time. I am hoping that its really just a heavy truck that will be stuck as a 7-8 second 0-60 time but will be able to move it around on the trails more easy. I was hoping for a bit more.

I have my AFR gauge in now and maybe ill get to the fuel pump this weekend for fathers day. Running the regular Tacoma TRD tube for now so that we can get some better baselines before digging any deeper.

 

Got the new trans cooler installed and took a trip this weekend to test it out. What a difference.

Previously the transmission always creeped up to 200 and beyond when I towed up steep grades or when off-roading in 4 low and making slow climbs.

With the CSF trans cooler mounted in the open above the skid plate plumbed through a 160 thermostat I never went over 185 all weekend. That includes towing our 3500 lb trailer from 5000’ up to 9000’ in 80-90 degree weather, stop and go traffic in 90 degree plus temps and some 4 low fun up in the mountains.

@Roostfactor thanks for testing this out and putting it out there as an option.

 

Your fuel pump is your Achilles heel Rob. That's what it is, and whatever is causing you to run pig rich as well.

 

Lets hope so. I am not discounting its holding me back thats for sure. If that solves all my problems the beers are on me. I know its but that drastic of a affect would be wild. Also prob will have some basic exhust work to get rid of some of the stock setup. Thats also prob not doing me any favors.

 

Well assuming everything is correct on your setup and your issue is fueling related then you are way ahead of the curve as far as mods go compared to others in base form running a 2.8.

 

Thats how I was looking at it. Take care of the FP and see where it stands.

 

I think that's the safest way to go about it without doing work you don't need to.

 

Dood! Look at that thing. The fact that you’d give just about any vehicle a run for its money is impressive.

So, relax Rob. You’re makin power just fine.

I feel better now.

 

haha yah I am going to go get it weighed and see where it stands. I would guess I have to be at least 800lbs over stock. I will say it does feel better was just hoping for more plus nothing to compare it to except one with a 2.8 I drove and it was much faster. With some internet help from this crazy group im over here figuring this shit out so thanks for answering my million questions.