Turbo Charging A Tundra!

Would one of those honeycomb intake inserts that "straighten" the air out over the MAF help? Supposed to make the readings from MAF less jumpy, and less likely to trigger a code. One of the s/c guys has it

 

Yes and those are used in the Stage 1 custom coupler as well as the Stage 2 piping to help smooth out the MAF. That is more a drivability fix as it cleans up the airflow so it doesn't cause the MAF reading to jump around. The MAX however is still the MAX when it comes to hitting 5v. The bigger the tube, the more air it takes to hit 5v, but with the stage 1 custom coupler, we can't go larger than the throttle body opening. Since Toyota in their infinite wisdom, didn't add a MAF/MAP combo like almost every other truck, we are stuck fighting with the MAF. If this was a GM LS engine, we could remove the MAF, switch to MAP and tune speed density and never have any of these issues...

 

If HP tuners could make a patch to the software, adding a custom map for an added MAP sensor, what a game changer, but we have been asking them about that for more than a year and they say it isn't possible... Maybe some pressure from the market?

 

Forgive my stupidity, but why can’t the maf be located between the air filter and the turbo? @TurboKits.com

 

It can, but then lose about 1/2 the filter size and have the complexity of recirculating the Blow Off Valve. And if the MAF tube isn't the correct size, you'll still run into MAX Volt issues.

 

Hey All, quick update, we have both our 2008 and 2014 test mules fully installed with the Stage 2 Intercooler set up. As soon as we have those custom MAF sensors. We'll dial in the tunes and get some results. In the meantime production parts are pouring in. We will have our Water Meth Kit as a stand alone purchase up on the site shortly and we have hot side piping, turbos, custom couplers, custom brackets, etc in stock. Should have our mandrel bent aluminum piping in soon as well. Getting closer everyone

 

Oh, just told our Water Meth kit is up on the site. Check it out and let us know if you have any questions. If any SC guys want to test out the kit, hit us up and we can work a test deal for you!

https://www.turbokits.com/2007-2021-tundra-5-7l-tk-water-meth-injection-kit.html

 

Morning all, quick update. The custom MAF sensor is doing it's job perfectly, we are up and over 6.5 PSI with the Stage 1 direct shot kit (we'll dial it back to ~4PSI for production for safety), but we are almost twice the expected boost for the Stage 1 and still have room on the high end of the voltage. We are now dialing it all in for smoothness, drivability and power and then we'll hit the DYNO. Also, we have gotten quite a few questions about the development of the kit and wanted to clarify. The MAF sensor issue was only for us to get this Stage 1, direct shot set up to work. It was never an issue with the Stage 2. The stage 2 is fully into a production cycle and we should have those kits available as soon as our mandrel bent piping comes in. We are taking this time in between to see if we can get this Stage 1 kit production ready. Anyway, that's the update for now. Still moving in the right direction. Thanks for all the support and questions!

 

Here is a visual representation of the MAF sensor voltage issue we have solved! This new sensor will be a heaven send for ANYONE needing extra voltage and flow from the MAF without having to do the MAF tube sample size dance. We'll make this available as a separate purchase on our site for the SC guys too!

Here is the stock sensor, in a 3.5" housing (3.4" ID) you can see it is maxing out the voltage at only 4K RPMs and about 2-3 PSI.



Here is our Upgraded sensor in the same truck, same MAF housing (3.5" housing (3.4" ID)), this one full rip, MAX RPMs and 4.5 PSI and only 4.25v, so has head room! Flowing 49lbs/min, quick math, 500HP from the motor, so should get us about 400 on the DYNO, exactly our goal for the stage 1. This is our turbo kit, stage 1 straight shot coupler, stock injectors, stock fuel pump, water meth and HP tuners tune.

 

I'm a tad confused - as always

I use a std Tundra intake 3.5"...I have a Harrop 2.65L - pushing 8psi-ish <when I ran the 80mm pulley> 477whp.

and I don't max the MAF till redline.

why is yours maxing the MAF @ 2psi?



speak slowly....I'm simply inquisitive.

 

Possibly the main difference is draw through, vs blow through. We have the MAF after the turbo, whereas the SC pulls through the MAF. Do you have a screen shot of the log, are you maxing voltage or did they rescale the MAF and let it ride the top voltage? Also, not talking trash on anything or anyone, just laying out all of the info we have seen during our development in hopes to be as transparent as possible as well as maybe help someone else down the road

 

maxing voltage.

my MAF has not been re-scaled.

and thanks for expounding. <hat tip>

assuming MAF is MAF - there is just such a large delta between your numbers & mine....and my brain can't draw a straight line between the 2.

maxing the MAF @ 2-3psi in ponderous to me. I'm not challenging y'all. I'm simply confused.

I run stock intake & exhaust.
so, I think I'm a fairly good candidate for comparisons - as variable have been minimized.

 

Yeah, then it's the difference between the induction type and the MAF location. We have always done BLOW THROUGH set ups, that way you can run the largest filter possible on the turbo and not have to worry about the BOV recirculation issue that comes with a draw through set up. Neither of these issues are a concern on SCs, due to how they install and function.

 

Y'all may get a kick out of this, disadvantage is it is rear mounted:
https://youtu.be/_7Mrho6uW3U?si=6kUB67UTF0J31gCX

 

Those are cool and I love the short cab Tundra, not very useful for most people, but I bet it would be a hell of a drag truck! I actually had an STS remote mount on an old 4Runner of mine, would ingest soo much water during heavy rain, it would stall and I'd have to come back and get it from whatever parking lot I made it to the next day... LOL.

 

I was wondering about the water ingestion on these mid or rear mounted turbos.
The heavy rain "tests" I've seen on Youtube would indicate otherwise but glad to hear real world experience showing these can be problematic under certain conditions. I would imagine dust would be a problem on these too if folks go off road with their trucks.

 

Yeah and if you were a really deep mud offroad guy, well, you couldn't...

 

I saw someone with an STS rear-mount on their Tacoma that had the turbo intake routed into their bed...might be an option.

 

Yeah, since ours was on a 4Runner, we didn't have the option to tuck anything up higher. Was fun, but wasn't ideal

 

Got something for the 2UZ? I have a GX470 that I'm planning to boost and always like to check all the options

 

Nothing at this time, but would be a great project!

 

Hey Hey, Update and some good news,

Well, the weather has been crappy in CT, snow, snow, and more cold and snow. I think we saw a stretch of about 20 days without sun and wet roads. The good news, it has allowed us to really test this set up in extreme cold conditions, morning drives in the teens, full boosted 4WD runs up into the 100MPH range, in order to not spin 3rd gear on the cold roads in 2WD (we do not suggest this! LOL). We are happy to say, the custom sensor is doing the job perfectly. The truck runs amazing, super stout, and able to get an extra 0.5-1.0 PSI out of the upgraded MAF before 5v. To date, this is definitely the fastest Stage 1 set up in terms of feel on the street. The tune is spot on, drives like stock, but with an extra 100+HP and makes all the great turbo noises you'd want.

The not-so-great news... We did attempt to get on the DYNO Monday but had some issues with getting it to load the truck correctly. The normal DYNO we have used for years isn't wide enough with the 12" meats we have on this truck, so we went to another DYNO. Unfortunately, the loading logic caused it to almost stall it out in a 4th gear run, it wasn't allowing us to really get accurate #s. The tuner said, the silver lining with how the DYNO overloaded the truck, was that we have in effect, tested a full 4th gear run to 120MPH, basically towing a house! LOL... The cleanest run we got was putting the DYNO into AWD mode with front tires hanging off the rollers . It loaded it slightly better, and allowed a cleaner run, still way too much load tho. It made 463WHP and 510WTQ, those #s are definitely inflated to take into account the AWD losses, but if you pull them back to the expected drivetrain loss for 2WD, about 5-10% lower, it does put us right where we expect to be with this new stage 1 set up: 410WHP and 430-450WTQ at 4.5 PSI. Which is in line with what the 2008 and the 2021 made at the lower 3.5 PSI level and stock MAF sensor, if you add the extra PSI the new MAF allows.

Anyway, we picked up a set of stock steelies this morning from a local FB marketplace seller. We will be dropping the Tundra off to ECS performance in the next few days. This is the DYNO we have used on every project for the last 15 years (I personally have over 2000 runs on this DYNO with various vehicles and a few tractors ). It is also the same DYNO we used on the 2008 and the 2021 stage 1 tests. A Bonus, their head tuner, Paul, is the one who has tuned the trucks. So I am hoping to prove the numbers we expect shortly and be able to move onto Stage 2 testing.

At this point, other than proving the #s, which we are confident of and kind of already have with the 2008 and 2021... We are 10000% confident that the Stage 1 kit is ready to rock! Power is phenomenal feeling on the street, the tune is unbelievably solid and accurately using all the MAF points. If anyone wants to dip their toes into the world of FI Turbo Turdras. Hit us up!

2008 Tundra 5.7 Stage 1 DYNO - 3.5 PSI

2021 Tundra 5.7 Stage 1 DYNO - 3.5 PSI

2014 Tundra 5.7 Stage 1 DYNO 4.5-5 PSI *Coming Soon


Thanks again for all the messages, support, calls, emails, etc... We are hoping that the full transparency on the process will help give an inside look on what development takes.

 

Be really curious to see the 4.5-5psi run with an intercooler. I think that is gonna be the money setup.

 

y'all are accomplishing these numbers with 3.5psi - which takes me 8psi (blower) to do.

kudos!

 

Once we have the Stage 2, Intercooled set up on, 650cc Inj and Pump, we'll be able to push really whatever we want. However, PSI to PSI I don't expect there to be any difference in the power between the Stage 1 and Stage 2, if anything the Stage 2 will lose a bit of response due to the piping and intercooler. But since the Stage 1 runs water meth, I don't really expect to see any power differences. The real benefits of the Stage 2 are going to be larger injectors allowing more boost, cooler charge temps WITHOUT water meth and a higher HP capability.

 

400WHP and 450WTQ with the blower at 8 PSI? I thought the blowers where making closer to 500WHP (which is our goal with the Stage 2).

 

eh...477whp/518Tq @ 8.6 psi-ish

 

Yeah, you do lose a bit to spinning the charger, but those are solid #s. Hoping we see those at a lower boost level, which would make sense without the spinning losses. My guess is tho, the turbo will kill it on the Torque#s, probably closer to 550 Tq at 8-9 PSI. We'll see how everything holds together as we turn it up

 

Be careful not to blow those rusty things off the truck!!!!

 

Ha Ha, right, they will just be used on the DYNO and then back to the 305s