Sorry, I keep forgetting that not everyone knows Dave's setup:

http://www.customtacos.com/gallery2/...Mods_List3.JPG

It's all straight over-the-counter bolt-on. SC, 7th, headers, cat-back, 2.0" pulley, methanol, FTC...

 

So, based on the competing dynos, I couldn't help but make a little Mathcad sheet comparing the two... I realize it isn't a fair comparison since the Turbo system isn't really "dialed in" yet, but I thought I'd start here, and update the sheet when a dyno run comes out. It's in PDF format, so you guys know. I also realize the comparison starts at 3800 rpms (where TRDOldMan's dyno sheet starts) past the turbos huge torque spike, but I get the feeling it is too fleeting to make a large difference in the average horsepower values.

Supercharged vs. Turbocharged 3.4L V-6


What can I say, I'm a big nerd

 

Nice work! Feels like I need a math refresher course after reading that I will get up a dyno after I run it at 10 and 12 psi so we can compare more accuratley the two systems. Thanks for the sheet - A+ on this assignment for you!!

 

Well, what I'd REALLY like to see is a Dyno run from like 1500 or 2000 rpms up to red-line, to see the turbo kick-in in the torque. If you're pulling a couple of runs, try getting some data accross the entire RPM range

Hmm, I wonder if TRDOldMan has a dyno run that shows his power lower in the rpms? I'd like to be able to compare low-end torque and power delivery from 2000rpm-4000rpm more than anything

 

I will get a full dyno graph next time - I am sure I can get them for this run too. I will go ask tommorow.

 

That looks like promising stuff. Can't wait to see what it does at 12 psi.

 

Me neither! I have done the following modifications and going to take another run at 7 psi to see if I can better the results:

1. Ground off some weld boogers that were obstructing the down pipe right at the flange where it attached to the hot side of the turbo - about .25 inches worth!!

2. Fixed exhaust leaks at both sides of crossover pipe - one was big and one was small. Should dramatically increase spooling.

3. Installed a Split Second voltage clamp for my MAF. This will prevent the ecu from cutting the fuel when it sees all this boost blowing by it.

4. Installed an "O" shaped throttle body gasket instead of the stock "D" shaped one. Not quite sure why the stock one was installed back in the first place

5. Installed new URD port fueler. The old one I had was seeping a bit of fuel at the end plug and could not be rewelded (tried 4 times). URD, as always, took care of me though...

6. Replaced rear O2 sensor - old one was fried and was throwing a CEL. Don't think it will help performance but it it will be nice to not have the light on.

That's about it! Getting back on the Dyno next Tuesday so we will see what effects all this had!!

 

Greedy you got a pm in a sec...

 

ttt - dyno numbers?

Damn this makes me wanna go blow up my 3.0 4runner and start out with a 3.4! lol

 

The truck is in the body shop now getting the front end de-dinged and painted. Last time I ran it on the dyno at 5-6 lbs and got 250 hp. I tried to up the boost with the boost controller but went a little crazy and it boosted up to 15 lbs really quick and back fired. I didn't know at the time but it threw a CEL (it was already on for an unrelated issue) and the toyota ecu took out a batch of timing (8 degrees for a misfire on cylinders #1 & 2). This caused me to gain no more power even though we upped the boost to 10 lbs. We shut down the dyno session - I took it home and found out what had happened. Going back soon to get a HP & tQ number at 12 lbs. I will be sure to post it up!!

 

Has SpeedFactory started to produce these turbos yet?

 

Nope... Gregg's been updating the Custom Taco's thread more than here (that's more his home that YT) and it looks like Ricky (Mr. Speedfactory) just isn't biting as hard as folks would want him to.

The (current) bottom of the CT thread is here.

 

ok so im still wraping by brain around all the FI stuff...

but like someone else mentioned....

what the helll happens on the dino charts between 2500 and 3500

my poor 3.slow seat of the pants dyno says its pulls best between 3200 and 3700 If i keep my foot in it and pull all the way through 4500 you can really feell it flatten out/drop off above 4K.

while my seat of the pants and little 3.slow dont hold a candle to your 300hp setups...

still doesnt answer the question of whats going on durring most of the "normal" round town/wheeling rpms....

 

oh and your tranny is a A340 varriant no? (A340F i think?!?)

 

The turbo doesn't start spooling untill ~2000 rpm's or so so it is easy to keep it out of boost if you want. With no boost (positive pressure in the intake plenum), it drives just like it was naturally aspriated. If you want power down low, the S/C is the way to go. Mine does not make power untill I get up in the 2500 rpm range - but then it comes on like crazy.

 

Dont mind me. Im just subscribing to the tread. :pat:

 

or if you want power down low, power brake!

NOTHING is sexier than hearing a turbo spool up with a nice loud BOV....except having the loud drone of a throaty exhuast to go with the pssssSSSSSSSS-PSHTT!!-pppssssssSSSSSSSS-PSH-SH-SH-shsh....

 

i never surf the 3rd gen section so i just saw this thread. interesting stuff, looks like a top notch install. I definetly wanna see how solid a setup you can make it. From what i read you guys are using the stock mass-airflow setup with some sort of piggy back? I'm not at all familiar with the URD stuff but i see that name alot in regard to the 3.4 superchargers. How does the fuel system work?

I'm using a MAP-ECU which simulates the AFM (stock was a speed density, not mass-flow) signal to the ECU which is nice b/c i can take out the AFM completely. I have RC 550 injectors and an Aeromotive A1000 fuel pump. I'm actually installing the same wideband you have (innovative LC1) today and this weekend so i can finally tune the base fuel map i downloaded.

Last thing, i assume you guys located a internal oil pressure line in the block and drill/tap a port to feed the turbo oil and then drain it back to the pan. Thats the only way i could think to do it on a non-factory turbo engine, i know it's done alot i've just never inspected one up close.

good work so far ! Whenever i get mine on a dyno I'll post numbers up, but at the rate i get things done that could be next decade

 

Thanks - the set-up has proven pretty reliable so far after the initial bugs were figured out. Here is what I have in there for fueling:

Stock Injectors

URD port fueler - 6 additional 30# injectors in a sandwich plate between the upper and lower intake plenum.

Addional Injector Controller - Controls the 6 extra injectors depending on RPM and intake manifold pressure

255 lph walboro fuel pump

I am using the stock mass air flow sensor mounted between the intercooler and throttle body. THe only calibration I have hooked to that is a MAF voltage clamp - it holds the voltage coming from the sensor to an absolute amount so when under boost, no CEL is thrown

Timing is taken (or will be taken) out via a Split Second Fuel timing calibrator (FTC). I had this left over from my S/C install.

I also have a split second 02 sensor conditioner. This is triggered by manifold pressure as well and "tricks" the stock ecu to go into open loop even though i'm not at WOT. this allows me to put fuel in when in low boost (3-7 lbs) at part throttle via the port fueler without the stock system pulling out fuel from the stock injectors tryin to get back to 14.7:1.

The oil feed for the turbo comes out of the oil pressure sensor tap on the drivers side of the block. It is then fed straight out the bottom of the turbo and back into the oil pan on the passenger side.

It's been busy at my work so I have not had too much time to work on my truck and get it back to the dyno. I am installing my esc1 again this weekend - I had to send it back to split second to have it tested but it ended up being fine. I have re-worked some grounds and vaccuum tubing to hopefully fix the issue. Post up or PM me when you get some numbers! I would like to see how a turbo 3.0 runs!!

 

wow looks like alot of work and money .... i wanna see a dyno run soon