For anyone who doesn’t have Instagram, here’s a highway pull. I believe it hit 426 hp or so in that pull.

 

Nice and thanks for the post

 

JLT intake is installed! Looks really good and the turbos are so loud it’s ridiculous. I will get some videos up tomorrow.

 

I bet they are!!! Looks Great!

 

Begs me to ask, why not remove the underhood insulation blanket? Even more sound? KM

 

Would that actually make them louder? What’s the insulation blanket for anyway, fire?

 

Looking good

 

Sorry guys, no video today, but I’ll get one soon. Promise.

 

My wife said the same thing about getting one up soon!!!!!

 

Here’s a short video of some intake sound. Not the best video. It’s also not full spool in that video either.

 

Here’s an interesting bit of information.

Basically what’s happening is during WOT, my wastegates were 100% closed, resulting in 22.5 psi. Not a bad thing, but here’s what was actually bad.

See this photo? (I took the actuator off the stage 2 turbo and am comparing it with my stock turbo wastegate actuator on my old stock turbo.) This is the wastegate actuator, shoved all the way till the wastegate is closed, and that’s how far the bolt sticks out for the preload.

Stage 2 Turbo’s Wastegate Actuator

Now, take a look at this picture. Here’s the stock wastegate off my old stock turbo. Look how far the threads stick out, there’s a lot less preload on the stock wastegates. So, I threw the stock wastegates onto the stage 2 turbos, and hopefully that fixes the problem.

Stock turbo’s Wastegate Actuator

 

Here’s another fun video.

 

nice ^

 

Filled up with 5 gallons of Ethanol and the rest with 91 today.

I don’t know what to say except, I have to find a way to run it more often.

Truck made 45lb/min and it was such a joy to drive. It’s wildly fast and just wants to hang out in the higher Rpms.

 

For those wondering, my boost PID in my datalog configuration was incorrect, and I used manifold gauge pressure, and boost was 26.11 psi.

 

I wonder if my engine would blow if I hit 26 instead of 15

 

Only one way to find out!!!!

 

His truck is now a tow-dedicated truck.
So even if he threw some money at tuning the beast, it's highly recommended to remove the performance tunes when towing. So I'm guessing he's not gonna bite. 🤣

 

Are you joking? Btw CRP told me these are the turbos that would be best for towing. 😂

 

Good guess

 

I won't need em til I need em !

 

It appears my boost PID is off on any number, because earlier it was 10 psi, but manifold gauge pressure said 14.3 psi once I converted it.

 

A tune specifically for towing is very different than what I meant when I stated:
"it's highly recommended to remove the performance tunes when towing"

Fellas chasing performance with Turbos and tunes and E85, 50, 40, 30..... Well, I don't think they are daily-ing a tow tune?

 

I think I forgot to mention it, but I did a 0-60 time the other day just on a random road, traction control off and advance trac off. I was in 4x4 and brake boosted it a little more this time, still not a super hard launch, and got 5.4 seconds. I think I could do it even faster, but I don’t really want to push my drivetrain too hard. My 0-30 was like just slightly over 2 seconds.

 

Matt do you have any insights on changes to mpg yet? Obviously not the top concern in a turbo swap, but I’ve been rather curious of the impact?

 

Yeah I do have some insights. I will say right off the bat, my mpg isn’t worse than before. On stock turbos and all tuned up, I was getting 16.5 mpg. On these turbos I’m getting 19 mpg. Why?
Here’s my theory. These big turbos take longer to spool up, so I can drive down the highway with less boost than before. In other words, the stock turbos efficiency was probably at its max with only 50-60% throttle and like 20 psi. These turbos have their most efficiency at much higher rpm so I think I’m burning less fuel, because I’m getting less air down low.

Before, on stock turbos, if I was going 30mph and I gave it 30% throttle I’d see like 25 or 26 lb/min.

On these big turbos, if I’m going 30 and I give it 30% throttle I only see like 20 or 22 lb/min.

But here’s the catch, it doesn’t feel any slower. I’m not sure if it’s because my torque is higher or what, but down low I’m making slightly less horsepower. But let me tell ya, up top, this thing is crazy.

On stock turbos it would pull really good off the line, and then when it got to 5000 rpm it would fall on its face and power would drop off.

On these turbos when it gets to 5000 rpm it pulls even harder. It does not drop off anymore. That’s why I was able to pull off a 6.3second 0-60 from a dig. Because up top it shaved off a lot of time.

Sorry, I got a little carried away in my answer to your question haha.

 

Ok guys I have some cool stuff for you to look at.
Here’s a WOT run locked in 3rd gear from 3000rpm to redline. I was a little scared cuz I ended up at almost 100 mph, but I needed to do it.

This chart is showing a lot of stuff but at the moment the orange is airflow

Here’s another graph showing Wastegate Percentage. You can see where it’s flat at the bottom it’s fully closed, then as it gets closer to redline it starts to open some, backing boost off to 18 psi or so. I’m not exactly sure why it’s backed off up top.

Heres the most interesting info to me in this log. First time testing out the Manifold Gauge Pressure DMR instead of the Boost PID. The Boost PID is not accurate and is completely off. You can see I have numbered a couple things.

#1- Boost is at around 21 psi, rpm was around 3500
#2- Here boost has jumped up to 26 psi and it holds it for a ways as you can see.
#3- At this point boost has dropped down to 18 psi, and if you scroll back and look at my wastegate percentage screenshot you can see the wastegate opens up right here. It’s also at around 5600 rpm right here.
#4- This is the rpm’s so you can see it versus boost.

 

Not trying to be critical, it is easy to clean up the graph and display the desired info.

I may know only enough about this stuff to be dangerous but never tire of the info available!

Far as the vac you are pulling yes there is quite a difference as my OEM is into boost by 17% throttle. That can go a long way to the better MPGs you get with the big turbos. An aspect not even considered by most!

 

Oh dang I didn’t even know. Thanks a lot! Yep, I honestly didn’t even consider it myself till I actually started driving. Then I immediately noticed they spooled up much slower. My guess is the stage 3s would get worse mpg because the exducer is smaller to make them spool faster. The stage 4s would probably get even better mpg, and I may upgrade to those eventually anyway.

 

I wouldn't be worried about the 3rd gear at 100 mph. My stock gen 1 3.5 3.55 6 speed holds 3rd all the way to speed limiter, about 107.

 

No no, I’m saying the speed scared me, I was on a road with a speed limit a lot lower than 100 lol. But yeah I should be the same as you then cuz I have a 3.55 as well and 6 speed trans.

 

If I remember correctly, the Manifold Gauge Pressure and the PSI readings come from different sensor in different parts of the system. Specifically, before and after the Throttle body. I'm not sure if that has an impact or not.

 

My datalog from saturday. I let off at 103 in 6th with 15.22psi.

 

That’s on your stock turbos right? I see you hit a max of 21 psi. Where was that in the rpm band?

 

Haven’t done any pics of the truck for a bit…
Removed the intercooler shutters today. I think it’s wise to keep them on in the winter to help reduce condensation, but I do have the “weep hole”. On the way home my IATs were only 10 degrees warmer than ambient. I’ve been seeing them at 88-100 degrees in 60-70 degree ambient temps. And the reason, is because they shutters are closed a lot of the time.