TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

How is the ovtune?

 

Thanks

 

@White lightning boosted get a good tune with ur meth kit so i can use it on my truck to please lol. im 2.6 right now too.

 

I have no idea. It would drop as far down to like 8.8 sometimes on part throttle. But at wide open throttle it was pretty much in a good AFR range. I wonder if it has to do with the open loop change during shifting affecting it.

 

I'll be glad to. I'm going 2.6 to start 2.5 if I'm rich. I really like the ovtune so far. Truck ran smooth with trd, but ovtune is noticeably a smoother power curve. From idle to redline. I just wish I was better with computers. That's the only hangup for me. I'm happy with how my meth settings are now. With some data logging and custom tuning I see big potential. The gains in tuning will be in timing and octane settings. Big tuning differences between 87 and 93 right? How about 93 at lower rpm and 105+ up top? I'll just have a safety net rpm. Like if the meth system went down I'd just not get on it past a given rpm of my choice. Get it tuned correctly and enjoy it. I dont want to over work a stock motor too much.

 

People pushing over 400whp is when problems start internally for stock 1gr-fe. Otherwise it’s a pretty strong motor. And that has been proven

 

@12TRDTacoma are you running all 4 cats?

 

Good goal to shoot for. 400 til its paid for. Then a stroke motor.

 

Most likely you were that rich due to open loop with throttle pedal. Since the ecu no longer is controlling afr and just sending a predetermined injector pulse width to the injector, the higher fuel pressure is dumping more fuel. That's fine for wot but in open loop at 1/2 throttle I could see why it would be rich.

 

Yes I am.

Yeah now that I think about it that makes sense in part throttle applications..

But then again why would it do that if the regulator is increasing fuel pressure based upon the amount of boost being applied to it at the time? (I hope I asked that in a way that makes sense)

 

Rich AFRs 6 psi at half throttle? Maybe I doubt it though. I mean the FPR mod gives more fuel but not that much to be at 8 or 9 AFR in open loop. That’s just stupid rich. But you can easily remove FPR mod and test that theory.

I’m surprise with a 2.3 pulley and under 1000ft you are only seeing 11 psi especially if you have all your cats and stock exhaust. I’m curious if you put your AFR sensor upstream from cats what your numbers would be.

I’m getting 7 psi at 5500/6000ft with headers custom ypipe all the way back.

 

8 or 9 AFR with cats?

 

I hit 11 psi with 2.6 pulley no cats. When it’s chilly out.

 

Remember boost is actually an indicator of how restrictive your engine is. An engine with more bottlenecks and more psi of boost may make the same power as the one with less bottlenecks and less psi of boost. So yeah while the higher number is cool for me to see, it's not everything at the end of the day.

One thing is for sure. I have slippage as of right now at the belt is for sure, because what I hit yesterday is not what I hit today. 10.2 PSI was what I saw max on a WOT run today as I was getting on the freeway. Needless to say I will be needing to replace my serpentine belt for a fresh one very soon if I want to take advantage of the smaller pulley. I am definitely leaving boost off the table right now because of it.

My 2.5 was capable of 11 psi as well but it was not a number I was consistently seeing on a semi regular basis when I would hammer the throttle. That number is more of a peak.

 

Just got some nitto nt05 today. Gotta Mount them up on Monday and try some 2 step launch’s and see if they stick. Also waiting for my Spare wheels to come back from powdercoating and order some drag radials. Because race truck

 

Does everyone running a full exhaust have afr #s go up and down constantly? Sh*[ makes me dizzy trying to read them.

 

I must have more bottle necks

DT long tubes & Y pipe, no cats, URD 3” Cat Back, 2.55” pulley.

It WAS like 35* F that morning though.

That’s also peak recorded by the gauge. Probably just hit 12 for a split second.

 

That’s my point! Yeah you’re right MAF makes the power. I just think a 2.3 pulley at low elevation with a stock exhaust plus 4 cats should have a much higher psi than 11. Also if your AFR sensor is down stream it’s going to be less accurate than a location upstream regarding the cats.

But belt slippage could cause some of this being lower psi. Although I don’t have it and my blower is spinning pretty close to the same as a 2.3 pulley. Maybe my larger diameter NST is helping reduce that

 

I forgot you got the larger NST's yeah that'll do it and bring you to higher boost levels.

Apparently I must be running fairly efficiently if my boost is coming a little lower.. which is okay. Even then 11 psi was just an initial run for me that was like first time I laid down the hammer so I was actually quite pleased with it for first time. The belt needs changing at this point. The 2.5 has stretched and despite the pulley wrap mod and the RIP mod already on the 2.3 nothing beats a belt with proper tension because I'm sure it is costing a bunch of HP to spin the blower now which obviously drives up rotational resistance... more rotational resistance would equal more belt slippage if not as tight as it should be.

 

Got stuff this weekend.