The Death Trap - Street Build TRD Supercharged 2011 SR5

Im thinking i may just take everything apart, replace the plugs, replace injectors, check the cam gears and pretty much go through everything in the install and see if i can find a smoking gun. Idk what else to do.. ive wasted so much time and money on this terd. Its starting to bother me

 

Is your fpr good? Sorry don’t know if you checked it already, just been reading through here and I admit I may have skimmed through some. Just was the firsf thought that came to mind, I am not a mechanic though.

 

Just starting to bother you... I might be in a mental hospital if I was at the same point you're at. But yeah, I guess if it were me, I'd return it completely to stock, aside from reinstalling the stock cam gears, those could just be checked, then basically test all the parts in whatever capacity is possible, and re-do the installation.

 

On the same line as @Murphinator .... I have heard of fabled occurrences where the fuel filter can blow apart, sending fragments into the injectors that can cause all kinds of running issues. I actually switched to a Nissan filter, which has more durable metal components for filter elements.

 

Have not checked the fpr, any good tips on how to test it? I do have a fuel pressure gauge and it always reads 41-43psi, even when the truck is misbehaving.. appreciate the input!

 

Yeah this is probably my next step..

Does the nissan filter plug into the inline fuel filter kit that urd uses? Or how did you put yours on?

 

It basically does, yes. It’s not a perfect fit, so I did some hacking to make it all work. I’ll have to take some pictures of it if you’re interested, would be way easier to illustrate rather than describe.

 

You are running the wrong size belt. You need to be running a 69" style belt. If gates fleet runner series has the size available you can cut an extra rib or two or five off depending in what style they sell them in to fit your truck.

Go with a fleetrunner. Or RPM series. Better traction. Than standard and in your case it is super needed considering the size pulley you are running. I guarantee you have slippage right now new belt or not.

 

I think if you are reading consistent pressure then it is working correctly. Hope you get it figured out soon man, that would drive me insane not knowing what is wrong! Is it possible like an o2 sensor is flunking out and the ecu doesnt know what the afr actually is?

 

Okay. Good tip! Seems like a cheap way to get the most out of things.

 

Its wild what .4 or .5 inches of belt slack nets you in boost loss. I would imagine your blower is easily costing over 70hp alone just to turn it at WOT. That's a lot of duty to demand out a 5 rib serpentine if it is just slightly larger than it needs to be.

 

Do you have any tips for cutting ribs off so that the belt’s integrity is preserved?

 

Also - if I did this and suddenly went from 350hp to 420 at the wheels.... I’d have to buy you a case of beer. Or maybe flowers. Or something.

 

Flowers works, but I guarantee you that you'll easily reclaim .5 psi. In my case I gained back a consistent .8 psi... if not more..

 

Oh.... so 420 could be wishful thinking. Oh well. One can dream.

 

I am supposed to be at 415 base HP based upon the calculations I made. Wheel would be about 352.75HP assuming a 15% loss.

 

Thanks man, its starting to get me frustrated for sure.. Im not sure about the o2 sensor. could be the problem, but it seems like it should be throwing some kind of code if that's the case. Definitely something i'm going to look into either way, im running out of options at this point..

 

Definitely interested in some pics!

 

Were you able to datalog its current operational state?

Have you upgraded the fuel pump?

 

Yes I data logged the current state yesterday whenever it fell flat on it's face in 3rd gear.. Had roostfactor look at the data, and here's what he said:
"I did take a look at it and afr's are all over the place compared to commanded afr and both banks of afr's are different.
The injector duty cycle also is imbalanced between banks which correlates with the afr imbalance."

Waiting to hear back from Scott right now to see what he has to say.

Yes upgraded the fuel pump to walbro 255. Running the TRD 455cc injectors that came with the S/C