TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

What are you getting? 13 was about the average on mine, but also I don't have all sorts of overland and expo stuff on mine so weight might be hurting you on top of it all.

I used the supplied pump connector with the AEM pump and then just cut and soldered into the OE harness. Not much else you could do if you are on a time crunch.

 

yah figure it was easy. my solder game is crap so some connectors was what I was hoping for.

I was getting 10-11 mpg before the S/C but found my plugs were shot and needed a TB cleaning I would figure with the added power it would not be that bad. Even folks with 37's prob getting better than me.

My first couple tanks so far have been 6.5 and 7.5. No matter how yo look the overlanding crap should not drop it that much. My buddy with a stock S/C and 285's gets 14 mpg. Your getting something like that. truck is also regeared so hoping that its just not getting enough fuel at times and working harder. Engine def is producing a ton more heat which is to be expected but I was surprised at how much.

Also to note that at this mgp all of my heavy ass BAMF skids have been off some savings. I can try removing my rear tire and see but that big of a drop was not expected.

 

mind elaborating on this further?? How is it your getting up to speed sooner with a 2.8 pulley than with a 2.3 pulley??

 

It ran worse with the 2.3. Made more boost, but too much heat

 

ah...that makes sense then

 

Artificial fueling may be the key to running that pulley, but even then the PCM didn't seem to like the 2.3 pulley because it was not wanting to adjust the AFR down to 11.5ish without maxing out airflow and fueling tables apparently and it was also evident on the way it would stumble off the line intermittently and the way I would almost feel a random stumble at super partial throttle during driving at any speed.

 

have you calibrated your Speedo with hypertech. I bet you are getting 14-15. Your odometer isn’t recording accurate miles if you haven’t calibrated. You are traveling further than you think. Just like you are going faster than your speedo says.

 

Sweet......I’ll give these a shot when I do mine.

 

Full armor, cage, 37’s and 4.56 gearing and I get about 12.5-13 during daily driving. You have something going way wrong to be getting that low of mpg’s.

what tune are you running?

 

I have had the hypertech for 2 years. Its off a few still but not enough to cause that. Its close to accruate.

 

That is what I was thinking. I was thinking of you and your 37's when I commented. Big diff on our trucks is i have a bigger pulley, 35's and need a few supporting mods but that would not cause that big of a drop. I have TRD layered with some HP tune action from @JustDSM. Justin not sure if you saw anything that would lead to any fuel issues on the last log files?

Any ideas I can dig into? Would the fuel pump hurt that bad? I do know I need I need to replace but not to this extent.

 

He’s running your exact tune minus the trans. Somethings up.

 

Fuel pump would cause lean issues not overly rich. It needs to be done no doubt 100% but if you are actually getting low MPG there may be something in play that's hurting you. Poor aerodynamics will also cause a heavy hit on fuel economy. Like for example a tonneau or a topper or something may do more harm than good because it's changing the aerodynamics at the rear of the bed.

I'm just going off a mythbuster myth which was busted about the tonneau, not sure if the topper would cause the same, but my better intuition says yes.

You need an AFR gauge if you don't have it yet and a boost gauge to know what PSI you are running.

 

Anything that you can see in the last set of logs I sent? I can run another set but yah not sure where to check.

 

I don’t have mountains in my commute but we have to be close on aero and weight. I am 4.88 with 37s and get 14-15. The difference in 70 and 80 on the highway is as much as 2 mpg though. I try and avoid 10psi but sometimes duty calls. I am on 2.3 with aero motive pump. My aerodynamics ain’t great either.

 

Yah I hear you there. but I had all of this prior to the setup. a 30-50% drop is a bit much. I was getting 10-12.5 with my current tires and current setup. I was getting close to 14 with 285s. I did have a big drop last year before hand but after seeing plugs prob was a big part.

I am getting 8 PST on my Boost Gauge.

AFR should be soon. just got my gaskets and will get the bung welded. its already wired up.

 

Yah i doubt its a aerodynamics issues. I would have seen that already. Something else is up. Nothing I have is drastically different then most of the group. Even without the fuel pump I would not expect. Its not being driven much but is getting shit mpg =)

 

That's interesting. You're happy with the performance though? Not bogging or otherwise running funny?

I drove as conservatively as I could on a 800 mile highway trip a couple of years ago, with my 2.0" pulley, and I got 19mpg.

 

I am wanting some more from it for sure but it is nicer than before. I have some cut off which I attribute to the fuel pump. I was hoping or expecting that more power with re gear etc, the truck would wake up even more. I would be curious to see what someone else thought compared to driving their own. I have a couple buddies with M/T stock S/C trucks but no one with an AT immediately local.

Worst case I was expecting same MPG or slightly better due to the truck having more power to get it moving.

i can snap photo, clip, logs if anyone has any ideas.

 

I need to make this known. If you keep it under 72 you will get better gas mileage. Like as much as 10-15 miles per tank more.

Hey @nudavinci64 if you are going 80+ you need to bring it down to 70 or below. It makes that much of a difference.

You need to see where your AFRs are at under load because if something is funky the gauge will show it.