TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

I'm lost too lol. Over my head

 

Not terribly busy. I'm happy to chat if you'd like.

The graphs above are shown in grams (of airflow) per revolution of the crank. Formula is below:

[grams/sec measured by the MAF] * 60 / [RPM]

 

Quick question for you since we are on the cam gear topic. I think I asked you in a PM.......Do you take these and tune for them with HPtuner? Or does installing these not matter when you tune a truck? I guess I’m asking when you tune me up, if I install these afterwards. Will you have to retune me??

 

These are 100% safe to drop in on any truck with/without tune. However to really get the most of out of them a tune revision to account for the increased torque production would help. However, a revision wouldn't yield a whole lot. It's more for wringing every last bit out of the setup than anything mandatory.

 

I'm throwing bits of data up to illustrate my initial observations/first glance at your logs, and what I posted about those observations.

The addition of the gears in your setup did not yield typical results for what I see when typically tuning a truck with the addition of your gears. The airflow generally improves as seen in my N/A g/rev charts with the retarded cam gears. Your results show slightly less airflow (generally speaking) which is odd in-and-of itself. However your observed butt-dyno contests that. As does the fact you had some torque management stepping in and pulling back a little bit of timing (to reduce engine output) in the logs with your retarded gears which was not present in the log with stock exhaust cam timing. I'm going to have to dig through to see how that came to be.

In short, I'm really not ready to make any official statements on the addition of the retarded gears with the Kelford cams just yet. Still need to review.. But I want to keep everyone posted on what I'm seeing to keep things open and transparent.

 

Another thing that makes me a bit surprised to see this, is just how effing tight the stock fastener is on the end of the cam. Amazing there's any movement at all with the torque applied from the factory!

 

So are Kelby’s exhaust cam gears a different degree than what everyone has here? Or are we talking the intake side?

 

Kelby uses the same 3deg retard setup that APR/URD used/uses. So any of the comments/results here would carry over for the folks using the APR/URD gears. These are a fixed 3deg gear.

The intake side is a whole different animal which is a continuously variable setup (VVTi) which has a software limit of 0-80deg of advance. However, I don't believe the mechanism is capable of that range, nor would you really want to advance the intake cam that much.

Stock N/A Calibrations use 40deg of advance in certain cells. S/C Cal's have 35deg.

 

So I’ll be in need for a custom tune soon (I’ve got hp tuners on the shelf). I’ve got a salvage engine and I’m placing the kelford cams on it. I also have cam gears from Kel. Would you advise installing both at once or do cams first then gears later from a tuning stand point?

 

It's because there's just so much BOOST.

I did a 650km road trip this weekend and paid attention to my fuel economy. I got around 11l/100km (21mpg). That also included a bit of city driving. That's better than when I had a 2.0" pulley and no camshafts. I'm surprised to say the least.

I almost wonder if the new camshafts help the truck stay out of boost - I felt like I was barely hitting boost and almost never activated water/meth injection.

**Edit: I was wrong. I totally f***ed up the calculation at first. It's actually 14.7mpg.

 

If I could go from 14mpg to >20mpg I just might be able to justify the cams. That is amazing.

 

Oh shit. My bad. Totally Engineered that calculation wrong *facepalm*. We're talking 16l/100km. So 14.7mpg. Not terrible but definitely more in-line with what people see. So much for the cams being a fuel saver....

 

21mpg. Dude that's like a very generous extra 7 MPG over what you are actually making. Lol.

Facepalm and fail on your math Athlaos.

 

I'm an engineer. We leave real math up to the EITs and technologists.

 

I would’ve blamed it on the USA not using the metric system. Because measuring things by football fields or number of refrigerators is more relevant.

 

Anyone need an extra large LTR/front heat exchanger?

 

Oh so you're THAT guy that designs engines oil filters in the most obscure, and hard to reach places, then when you do, you make a giant pigsty all over the subframe, engine block and ground.

I got my pitchfork ready. Hahaha.

 

Until you successfully install performance camshafts without looking at a single write up online or the FSM, just keep talking while your words pass through me

 

We do that regularly here at my work Mijo. I did it on my LS2 years ago as a matter of fact. At the end of the day an engine is still nuts and bolts, if there isn't space to work on it without removing stuff then the stuff that needs to get removed gets removed. Lol.

 

I don’t know exactly what you said there. Your command of English is about as good as an engineer’s. Props!!