*Closed* 20% Off Supercharger Group Buy 2nd Gen 4.0 Engine

Mine is 11.5 @ WOT with the TRD tune.

 

You also don't JUST have the SC and tune...I'm at mid to high 10s right now...a couple more mods and I'll be in the 11s

 

So what you're saying is... I really just need more mods.



Sweet!!!!!

 

Just the SC, 2.85 pulley and 255 lph fuel pump.

 

Always thought the 6MT had a little too much rev hang between gears, but seems worse following S/C install.

Still getting used to different feel with S/C, but any other 6MT owners experience increased rev hang when shifting?

 

When will be the next GB?

 

Pulley alone will raise your AFR a bit

 

Yep. A speed shifter will help your shifts, but the rev hang is a bitch. Watch your clutch too, it can't handle the supercharger power very well.

 

Crap I'd hate to see my afr's with a stock pulley!

 

Circling back around to your original statement.

2.85 pulley + 255 pump + Bully Dog:
WOT = pegged @ 10 (10? 9? 8? IDK)

2.85 pulley + 255 pump + TRD tune:
WOT = 11.5

Same mods w/ each scenario.



Also with the Bully Dog, that was just the WOT being too rich. Part throttle was a whole different story. Going lean at times when it shouldn't. Staying in closed loop for WAY longer than it should. I'm sure if I had a controlled test environment I could have documented some other unusual behaviors.

Not trying to start an argument with you, my friend. I appreciate what you contribute on this forum. But in my case your statement about the TRD tune not being much better is incorrect. I agree the TRD tune is not PERFECT but I would definitely describe it as MUCH BETTER.

These are just one man's data points. Each truck can be slightly different. YMMV

 

I've been trying to figure my truck out. I'm idling at about 13.8 with my aem afr gauge. And just cruising its around there. When I first start in the morning it's right around 14.7 but after about 15 seconds it drops. Under boost I am running around 11.5 and drops lower some times haven't really boosted that much with high rpms. I no it should be idling at 14.7. But don't have any rich codes or anything else. Let me no what everyone thinks.

My mods: magnuson super charger with 2.85 pulley. 76mm throttle body. Airaid intake. Walboro 255. Doug thorley long tubes. Factory y pipe with magnaflow muffler. Catch can. I think that's everything.

 

Thats a new one. Wish I could help ya.

 

Bully Dog or TRD flash?

 

Trd flash sorry

 

How does it run?

Where in your exhaust system is your wideband O2 located?

Use your Mongoose and look at your short term fuel trims when the AFR gauge is showing 13.8 and see if the values are negative to see if the ECU is pulling fuel or adding.

First start in the morning my secondary air pump runs for about 15 seconds. Don't know if your truck has a secondary air pump, but that would explain the gauge showing leaner the first 15 seconds because the pump is injecting more oxygen into the exhaust stream.

Is there a way to calibrate your AEM wideband? Maybe your wideband is skewed to the rich side a bit. With your Mongoose, try looking at the lambda values for each bank and see what the ECU thinks lambda is.

 

I dont think he has a secondary pump. I think those were added around 2012, but could be wrong.

 

ya i dont have air pumps. and theres no calibration for aem gauges. seems to be running amazing. i have it mounted in my ypipe right next to my 02 sensor on the passenger side. in front of it coming in at another angle. o2 sensor is around 2 o'clock and the wide band is around 10 o'clock. ya ill have to hook up the scan tool and see whats going on. only thought would be due to the 76mm throttle body. getting more air and its dumping to much fuel

 

How big is the stock TB compared to your 76

 

Stock is 65mm

 

Finally read all of this. Wish I had before I installed the BD